Shock resistance test device and method for steam generator in high-temperature pressurized environment

Abstract

The invention discloses a steam generator impact resistance test device and method in a high-temperature pressurized environment, relates to the technical field of steam generators, and aims to solve the problem that in the prior art, impact resistance research on a steam generator under the conditions of high temperature, high pressure and boiling phase-change heat transfer is insufficient. In the device, the steam generator equivalent model is installed on the vibration impact device, the steam generator fixing support is used for supporting the steam generator equivalent model, and the water supply system, the steam generator equivalent model and the drainage system are sequentially communicated. The device is further provided with a water supply flow sensor, a water supply pressure sensor, a drainage pressure sensor and a vapor-liquid two-phase flowmeter. The method comprises the following steps: adjusting each device to a set operation working condition, enabling the device to operate and process a stable stage, starting the vibration impact device, starting to collect data signals of each sensor, closing each device after vibration is finished, and repeating the steps to carry out a multi-working-condition vibration impact test.

Description

Technical Field

[0001] The invention relates to the technical field of steam generators, and in particular to research on the impact resistance of steam generators. Background Art

[0002] Steam generators are hub equipment that connect the primary and secondary circuits in power plants and power systems. Their heat transfer tubes not only serve as the pressure-bearing boundaries of the primary and secondary circuits, but also bear the role of transferring energy from the primary side to the secondary side. Therefore, higher requirements are placed on their safety and reliability. During operation, the internal flow field and heat transfer process of the steam generator are complex and changeable. Forced convection heat exchange occurs between the primary side and the heat transfer tube inside the tube, and the fluid elasticity easily causes vibration of the heat transfer tube; the secondary side outside the tube is a steam-liquid two-phase mixed working medium, which undergoes convection, subheated boiling, and nucleate boiling heat transfer with the heat transfer tube. Once affected by external load impact, the flow field flow and heat transfer are disordered, resulting in fluctuations in the outlet parameters of the steam-liquid two-phase; the structure causes stress damage, resulting in damage to the heat transfer tube, resulting in a relatively harsh working environment for the heat transfer tube. At present, experimental research on the impact resistance of steam generators is still insufficient, and related research is only based on the flow-induced vibration test or sway motion test of the steam generator unit tube bundle. In addition, traditional research on the impact resistance of power plants or power equipment is mostly focused on cold-state research, while there are fewer studies on the impact resistance of steam generators under high temperature, high pressure, and boiling phase change heat. This leads to unclear flow-heat-solid coupling mechanisms of steam generators under external impact loads, unclear thermal-hydraulic characteristics, and difficult prediction of response characteristics.

[0003] In the face of complex external shock environments (such as earthquakes, explosions, collisions, ocean movements, etc.) and to meet the increasingly superior requirements for equipment shock resistance, clarifying the impact of high temperature, high pressure, and boiling phase change heat transfer on the shock resistance of steam generators under external shock loads will become one of the main research directions in the shock field. In order to support the design optimization and safety assessment of the thermal-hydraulic characteristics and key weak structures of steam generators under external shock loads, and to promote the development of shock resistance standards in complex environments, it is urgent to provide further test data support through steam generator shock resistance tests under fluid-heat-solid multi-field coupling. Summary of the invention

[0004] The purpose of the present invention is to meet the development needs of the prior art and to provide a steam generator impact resistance test device and method under a high temperature and pressurized environment.

[0005] The present invention discloses a steam generator impact resistance test device under high temperature and pressurized environment, comprising a vibration impact device, a steam generator equivalent model, a steam generator fixed bracket, a water supply system, a drainage system, a water supply flow sensor, a water supply pressure sensor, a drainage pressure sensor and a steam-liquid two-phase flow meter; the steam generator equivalent model and the steam generator fixed bracket are both installed on the vibration impact device, the steam generator equivalent model is located at the center of the steam generator fixed bracket and is supported by the steam generator fixed bracket; the water supply system, the steam generator equivalent model and the drainage system are connected in sequence, the water supply flow sensor and the water supply pressure sensor are arranged between the water supply system and the steam generator equivalent model, and the drainage pressure sensor and the steam-liquid two-phase flow meter are arranged between the steam generator equivalent model and the drainage system.

[0006] Optionally, the vibration impact device includes a vibration impact table, a vibration impact table tooling frame and a vibration impact table control cabinet; the vibration impact table control cabinet is used to control the vibration impact output of the vibration impact table; the vibration impact table tooling frame is installed on the vibration impact table, and the steam generator equivalent model is installed on the vibration impact table tooling frame.

[0007] Optionally, the steam generator equivalent model includes a steam generator base, an electric heating element, an electric heating element base, a plurality of U-shaped tubes, a plurality of support plates, a plurality of insulating rubber buckles at the bottom of the U-shaped tubes, a plurality of built-in spiral metal heating rods, magnesium oxide insulating material, a metal edging shell, a hot and cold end partition plate, a water branch pipe, and a cleaning drain pipe; the electric heating element is installed on the electric heating element base, the electric heating element base is installed inside the steam generator base, the plurality of built-in spiral metal heating rods are fixed on the electric heating element, the plurality of built-in spiral metal heating rods are respectively embedded in the plurality of U-shaped tubes, and the built-in spiral metal The magnesium oxide insulating material is filled between the heating rod and the U-shaped tube; the plurality of support plates are used to support the plurality of U-shaped tubes, the ends of the plurality of U-shaped tubes are embedded in the steam generator base, and the insulating rubber buckles at the ends of the U-shaped tubes are wrapped around the ends of the U-shaped tubes; the support plates are fixed to the inner wall of the metal-rimmed shell, the bottom of the metal-rimmed shell is fixed to the steam generator base, the metal-rimmed shell is respectively connected to the water supply branch pipe and the cleaning and drainage pipe, a visualization window is provided on the side wall of the metal-rimmed shell at a position corresponding to the elbow of the U-shaped tube, and the hot and cold end partition plate is fixed on the center line of the U-shaped tube.

[0008] Optionally, the electric heating element includes an electric heating element anode and an electric heating element cathode, and the electric heating element anode and the electric heating element cathode are both fixed on the electric heating element base; the two ends of the built-in spiral metal heating rod are respectively an anode end and a cathode end, and the anode end and the cathode end are respectively fixed on the electric heating element anode and the electric heating element cathode; the anode end and the cathode end correspond to the hot end and the cold end of the U-shaped tube respectively.

[0009] Optionally, the steam generator fixed bracket includes a bracket body, a steam-liquid two-phase flowmeter support frame, several layers of support frame cover plates and a metal-edged shell circular fixing plate; the bracket body includes a plurality of support rod assemblies evenly arranged along the circumferential direction, and a plurality of support frames are arranged on the inner side of each support rod assembly from top to bottom, one side of the support frame cover plate is fixed to the end of the support frame, and the other side of the support frame cover plate is fixed to the side wall of the metal-edged shell, a steam-liquid two-phase flowmeter support frame is fixed to the top end of one of the support rod assemblies, and the steam-liquid two-phase flowmeter support frame is used to support the steam-liquid two-phase flowmeter, and the metal-edged shell circular fixing plate is in a circular ring shape, and the metal-edged shell circular fixing plate is fixed to the top support frame.

[0010] Optionally, the water supply system includes a water supply tank, a preheating device, a centrifugal variable frequency water pump, a flow control valve and a water supply temperature sensor; a water supply hole and a water supply tank observation port are provided on the top of the water supply tank, and the water supply hole is used to connect to an external water source; the water supply tank is connected to the preheating device, and the preheating device is connected to the water inlet of the centrifugal variable frequency water pump, the water supply temperature sensor is arranged between the preheating device and the centrifugal variable frequency water pump, the water outlet of the centrifugal variable frequency water pump is connected to the flow control valve, and the flow control valve is connected to the steam generator equivalent model.

[0011] Optionally, the drainage system includes a drainage water tank and a drainage water tank supporting bracket; the drainage water tank supporting bracket is used to support the drainage water tank, and the drainage water tank is provided with a drainage hole, and the drainage hole is connected to the steam generator equivalent model.

[0012] Optionally, the vibration shock table control cabinet is also used to provide working power for the steam generator equivalent model.

[0013] The test method of the steam generator anti-impact test device under the above-mentioned high-temperature pressurized environment includes: step one: determining the control parameters of the steam generator equivalent model according to the high temperature, high pressure and boiling phase change boundary conditions of the steam generator, and adjusting the water supply system according to the operation setting condition requirements so that the drainage pressure reaches the operation setting condition, starting the preheating device in the water supply system to the operation setting condition, starting and adjusting the steam generator equivalent model until the water supply is heated to a saturated liquid state, so that the water supply is heated and undergoes a boiling phase change to generate steam, and the steam mass flow rate accounts for a fraction of the total mass flow rate to the operation setting condition; step two: after the steam generator equivalent model meets the operation setting condition requirements, the steam generator anti-impact test device is operated continuously for 5 to 10 minutes to ensure the operation process of the steam generator anti-impact test device Whether it is in the steady-state stage; Step three: When the boiling phase change of the steam generator equivalent model is stable and meets the set operating conditions, start the vibration impact device, and simulate the behavior process of the internal flow field thermodynamics and external structural mechanics of the steam generator under impact conditions by inputting a three-way external load waveform; Step four: Collect the data signals of each sensor, and transmit all data signals to the computer in real time for processing; Step five: After the single-condition vibration impact test is completed, turn off the power of the vibration impact device, the steam generator equivalent model and the water supply system, and remove the remaining boiling water in the steam generator equivalent model; Step six: Repeat steps one to five to carry out multi-condition vibration impact tests until all test data are collected, and restore the stress condition of the steam generator equivalent model under vibration impact conditions based on the collected data.

[0014] Optionally, the step six uses a six-degree-of-freedom external load input boundary simulation method to restore the stress condition of the steam generator equivalent model under vibration and impact conditions.

[0015] The steam generator impact resistance test device under high temperature and pressurized environment of the present invention can simulate the operating state of the steam generator under high temperature and high pressure conditions when it is impacted. Through this test device, the thermal-hydraulic characteristics of the steam generator under external impact load conditions and the influence of high temperature and high pressure boiling phase change heat transfer on the impact resistance of the steam generator can be clarified, providing a basis for the safety assessment of the steam generator and the design optimization of key weak structures.

[0016] This leads to unclear fluid-heat-solid coupling mechanism, unclear thermal-hydraulic characteristics, and difficult prediction of response characteristics of steam generators under external impact loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram showing the principle of a steam generator anti-shock test device under a high temperature and pressurized environment according to an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a vibration impact device in a steam generator anti-impact test device under a high temperature and pressurized environment according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of the structure of a steam generator equivalent model in a steam generator anti-shock test device under a high-temperature pressurized environment according to an embodiment of the present application is shown, wherein (a) is the exterior of the steam generator equivalent model, and (b) is a schematic diagram of the internal three-dimensional structure of the steam generator equivalent model;

[0020] Figure 4 Shows Figure 3 (b) Schematic diagram of the enlarged structure of part A;

[0021] Figure 5 A schematic structural diagram of the end of a built-in spiral metal heating rod in a steam generator impact resistance test device under a high temperature and pressurized environment according to an embodiment of the present application is shown;

[0022] Figure 6 A schematic structural diagram of a support plate in a steam generator anti-shock test device under a high temperature and pressurized environment according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic diagram of the three-dimensional structure of a steam generator fixing bracket in a steam generator anti-shock test device under a high temperature and pressurized environment according to an embodiment of the present application is shown;

[0024] Figure 8 A three-dimensional structural schematic diagram of a water supply system in a steam generator anti-shock test device under a high temperature and pressurized environment according to an embodiment of the present application is shown;

[0025] Fig. 9 A three-dimensional structural schematic diagram of a drainage system in a steam generator anti-shock test device under a high-temperature pressurized environment according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions, or operations is inherently mutually exclusive in some way.

[0028] In view of the problems that the prior art has insufficiently studied the impact resistance of steam generators under high temperature, high pressure and boiling phase change heat transfer conditions, resulting in unclear flow-heat-solid coupling mechanism, unclear thermal-hydraulic characteristics and difficult prediction of response characteristics of steam generators under external impact loads, the present invention provides a steam generator impact resistance test device and method under high temperature and pressurized environment, which can simulate the impact resistance process of steam generators under high temperature, high pressure and boiling phase change heat transfer conditions, provide data support for the study of flow-heat-solid coupling mechanism and thermal-hydraulic characteristics of steam generators under external impact loads, and provide a basis for the prediction of the response characteristics of the steam generator.

[0029] Figure 1 The schematic diagram of the principle of a steam generator anti-shock test device under high temperature and pressure environment according to an embodiment of the present application is shown. Figure 1 As shown, the steam generator shock resistance test device under high temperature and pressurized environment of the embodiment of the present application includes a vibration impact device 1, a steam generator equivalent model 2, a steam generator fixed bracket 3, a water supply system 4, a drainage system 5, a water supply flow sensor 9, a water supply pressure sensor 10, a drainage pressure sensor 11 and a steam-liquid two-phase flow meter 12.

[0030] The steam generator equivalent model 2 is located at the center of the steam generator fixing bracket 3, and the steam generator fixing bracket 3 is used to support the steam generator equivalent model 2. The bottom of the steam generator equivalent model 2 and the bottom of the steam generator fixing bracket 3 are fixed to the vibration impact device 1 by anchor bolts, and the vibration impact device 1 is used to provide vibration impact according to a preset waveform and load the vibration impact onto the steam generator equivalent model 2.

[0031] The steam generator equivalent model 2 is used to simulate a real steam generator. The steam generator equivalent model 2 is equipped with a water supply system 4 and a drainage system 5, and sensors are arranged in the water supply system 4 and the drainage system 5 to measure the working conditions of the steam generator equivalent model 2. The water supply system 4 preheats the external water source and then transports it to the steam generator equivalent model 2. The water discharged from the steam generator equivalent model 2 enters the drainage system 5.

[0032] The sensors include a water supply flow sensor 9 , a water supply pressure sensor 10 , a drainage pressure sensor 11 and a gas-liquid two-phase flow meter 12 .

[0033] The water supply flow sensor 9 and the water supply pressure sensor 10 are arranged between the water supply system 4 and the steam generator equivalent model 2. Specifically, the water supply system 4 and the water supply flow sensor 9 are fixedly connected by flange means, the water supply flow sensor 9 and the water supply hose 6 are fixedly connected by flange means, the water supply hose 6 and the water supply pressure sensor 10 are fixedly connected by flange means, and the water supply pressure sensor 10 and the steam generator equivalent model 2 are fixedly connected by flange means.

[0034] The drainage pressure sensor and the steam-liquid two-phase flow meter are arranged between the steam generator equivalent model and the drainage system.

[0035] A drainage pressure regulating valve 8 is arranged between the steam generator equivalent model 2 and the drainage system 5 . The steam generator equivalent model 2 and the drainage pressure regulating valve 8 are fixedly connected by a flange, and the drainage pressure regulating valve 8 and the drainage system 5 are connected by a drainage hose 7 .

[0036] The exterior of the steam generator equivalent model 2, the water supply hose 6 and the drainage hose 7 are all wrapped with rubber-plastic heat insulation material.

[0037] like Figure 2 As shown, the vibration impact device 1 includes a vibration impact table 101, a vibration impact table tooling stand 102, and a vibration impact table control cabinet 103. The vibration impact table control cabinet 103 is connected to the vibration impact table 101 through a vibration impact table control cable 104. The vibration impact table control cabinet 103 provides a control signal to the vibration impact table 101, and the vibration impact table 101 outputs vibration impact under the drive of the control signal. The vibration impact table tooling stand 102 is installed on the vibration impact table 101 through anchor bolts, and the steam generator equivalent model 2 and the steam generator fixed bracket 3 are installed on the vibration impact table tooling stand 102.

[0038] like Figure 3 (a) and Figure 3As shown in (b), the steam generator equivalent model 2 includes a steam generator base 201, an electric heating element 202, an electric heating element base 204, a plurality of U-shaped tubes 205, a plurality of support plates 206, a plurality of insulating rubber buckles 215 at the bottom of the U-shaped tubes, a plurality of built-in spiral metal heating rods 213, magnesium oxide insulating material 214, a metal edging shell 207, a hot and cold end partition plate 210, a water supply branch pipe 211 and a cleaning and drainage pipe 212.

[0039] In one implementation, there are nine U-shaped tubes 205, which are divided into three rows, and two adjacent rows of U-shaped tubes 205 are arranged in a staggered manner. Accordingly, there are also nine spiral metal heating rods 213, and eighteen insulating rubber buckles 215 at the bottom of the U-shaped tubes.

[0040] Nine built-in spiral metal heating rods 213 are respectively embedded in the nine U-shaped tubes 205, and the space between them is filled with magnesium oxide insulating material 214. Figure 5 As shown, the two ends of the built-in spiral metal heating rod 213 are respectively an anode end 2003 and a cathode end 2004. Figure 4 As shown, the electric heating element 202 includes an electric heating element anode 2001 and an electric heating element cathode 2002, and the electric heating element anode 2001 and the electric heating element cathode 2002 are fixed to the electric heating element base 204 by bolts. The anode end 2003 and the cathode end 2004 of the built-in spiral metal heating rod 213 are welded to the electric heating element anode 2001 and the electric heating element cathode 2002 respectively. The two ends of the U-shaped tube 205 are respectively a hot end 2005 and a cold end 2006, and the hot end 2005 and the cold end 2006 correspond to the anode end 2003 and the cathode end 2004 of the built-in spiral metal heating rod 213 respectively. The working power supply of the electric heating element 202 can be provided by the vibration shock table control cabinet 103, and the electric heating element 202 is connected to the vibration shock table control cabinet 103 through the electric heating element control cable 203. The end of the U-shaped tube 205 is wrapped with an insulating rubber buckle 215 at the bottom of the U-shaped tube. The insulating rubber buckle 215 at the bottom of the U-shaped tube can play an insulating role between the U-shaped tube 205 and the electric heating element 202 .

[0041] The support plate 206 is provided with holes adapted to the nine U-shaped tubes 205. Figure 6 As shown. Figure 3 In the embodiment, there are three layers of support plates 206 , and nine U-shaped tubes 205 pass through the three layers of support plates 206 , with a gap of 3.00 mm being left between the U-shaped tubes 205 and the support plates 206 .

[0042] The U-shaped tube 205 and the support plate 206 are both located inside the metal-wrapped shell 207. The outer side of the support plate 206 is welded to the inner wall of the metal-wrapped shell 207. The bottom of the metal-wrapped shell 207 is fixed to the steam generator base 201. The electric heating element base 204 is located inside the steam generator base 201. The bottom of the metal-wrapped shell 207 on one side is welded with a water delivery branch pipe 211, and the bottom of the other side is welded with a cleaning drainage pipe 212. A visualization window 208 is provided on the metal-wrapped shell 207 at a position corresponding to the bending part of the U-shaped tube 205. The bottom of the metal-wrapped shell 207 is connected to the steam generator base 201 through an inlet flange splice 209. The inlet flange splice 209 is fixed to the upper surface of the steam generator base 201 by bolts, and the bottom of the metal-wrapped shell 207 is welded to the upper surface of the inlet flange splice 209.

[0043] The hot and cold end partition plate 210 is located at the center of the U-shaped tube 205, the two sides of the hot and cold end partition plate 210 are welded to the support plate 206, and the bottom of the hot and cold end partition plate 210 is welded to the upper surface of the steam generator base 201. The external water source is transported to the steam generator equivalent model 2 by the water supply system 4, and flows through the gaps between the nine U-shaped tubes 205 and between the nine U-shaped tubes 205 and the three-layer support plate 206.

[0044] like Figure 7 As shown, the steam generator fixing bracket includes a bracket body, a steam-liquid two-phase flow meter supporting bracket 302, a plurality of supporting bracket cover plates 303 and a metal-rimmed outer shell circular fixing plate 304.

[0045] The support body includes four support rod assemblies 301, which are evenly arranged in the circumferential direction, and the steam generator equivalent model 2 is located at the center of the four support rod assemblies 301. The bottom of the outer side of the support rod assembly 301 is triangular to improve the stability of the support rod assembly 301. Three support frames 3011 are arranged in sequence from top to bottom on the inner side of the support rod assembly 301, and the support frame cover plate 303 is fixed to the end of the support frame 3011 by bolts. The metal edging shell circular fixing plate 304 is fixed to the top support frame 3011 by bolts. The support frame cover plate 303 is welded to the metal edging shell 207 of the steam generator equivalent model 2.

[0046] The vapor-liquid two-phase flowmeter support frame 302 is welded to the top end of one of the support rod assemblies 301 , and the vapor-liquid two-phase flowmeter 12 is fixed to the vapor-liquid two-phase flowmeter support frame 302 via a flange.

[0047] like Figure 8 As shown, the water supply system 4 includes a water supply hole 401, a water supply tank 402, a water supply tank observation port 403, a water supply pipe 404, a preheating device 405, a centrifugal variable frequency water pump 406, a flow control valve 407 and a water supply temperature sensor 408.

[0048] The water supply hole 401 is welded to the top of the water supply tank 402 as a connector between the external water source water pipe and the water supply system 4. A water supply tank observation port 403 is provided on the top of the water supply tank 402 for observing the internal situation of the water supply tank 402. The edge of the water supply tank observation port 403 is welded to the water supply tank 402.

[0049] The water supply tank 402 is fixedly connected to the inlet of the preheating device 405 by means of a flange, the outlet of the preheating device 405 is fixedly connected to the water supply temperature sensor 408 by means of a flange, the water supply temperature sensor 408 is connected to the inlet of the centrifugal variable frequency water pump 406 by means of a hose, the outlet of the centrifugal variable frequency water pump 406 is connected to one end of the water supply pipe 404, the other end of the water supply pipe 404 is fixedly connected to the inlet of the flow control valve 407 by means of a flange, the outlet of the flow control valve 407 is connected to one end of the water supply hose 6, and the other end of the water supply hose 6 is connected to the steam generator equivalent model 2.

[0050] like Fig. 9 As shown, the drainage system 5 includes a drainage hole 501, a drainage water tank 502, a drainage water tank observation port 503, and a drainage water tank support bracket 504;

[0051] The drainage water tank 502 is placed above the drainage water tank support bracket 504. The drainage hole 501 is welded on the drainage water tank 502, and the drainage hole 501 is connected to the steam generator equivalent model 2 through the drainage hose 7. The drainage water tank 502 is provided with a drainage water tank observation port 503 for observing the internal situation of the drainage water tank 502.

[0052] The steam generator anti-shock test device under high temperature and pressurized environment of the embodiment of the present application integrates the vibration impact device, the water supply and drainage system, and the steam generator equivalent model into one, aiming to establish a complete steam generator anti-shock test environment. The steam generator anti-shock test device has a high degree of integration and can simulate the operating state of the steam generator under various working conditions to ensure the comprehensiveness and accuracy of the test.

[0053] By means of the steam generator impact resistance test device of the present invention, testers can conveniently conduct impact resistance tests on steam generators without the need to construct other complex systems, which can not only improve test efficiency but also reduce test costs.

[0054] The steam generator shock test is carried out using the steam generator shock test device under the high temperature and pressure environment. The test process mainly includes the test preparation stage, the test implementation stage and the test end stage. In the test preparation stage, it is necessary to conduct a comprehensive inspection of each device of the test device and set the test parameters; in the test implementation stage, multi-condition shock tests are carried out; at the end of the test, the equipment is disassembled and safely stored.

[0055] (1) Test preparation stage

[0056] Step 1: According to the structure of the above-mentioned steam generator impact test device, install and arrange the vibration impact device 1, steam generator equivalent model 2, steam generator fixed bracket 3, water supply system 4, drainage system 5, water supply hose 6, drainage hose 7, drainage pressure regulating valve 8, water supply flow sensor 9, water supply pressure sensor 10, drainage pressure sensor 11, steam-liquid two-phase flowmeter 12 and rubber-plastic insulation materials to construct the water supply and drainage circuits of the test device to ensure that all equipment and components are connected normally during the test.

[0057] Step 2: Fill the water into the water supply tank 402 through the water supply hole 401 in the water supply system 4, observe the water level at the observation port 403 of the water supply tank, manually open the flow control valve 407 and the drainage pressure regulating valve 8, control the water supply flow to the maximum gear through the flow control valve 407, control the drainage pressure to the minimum gear through the drainage pressure regulating valve 8, start the centrifugal variable frequency water pump 406, and discharge the air inside the steam generator equivalent model 2 through continuous water supply to ensure that the air is emptied from the inside of each equipment and component during the test.

[0058] Step 3: Start the preheating device 405 in the water supply system 4, adjust the heating power of the preheating device 405, and observe the water supply temperature sensor 408 to ensure that the water supply can be preheated to 50-90° C. during the test.

[0059] Step 4: Start the electric heating element 202 in the steam generator equivalent model 2, heat the nine U-shaped tubes 205 through the electric heating element 202, and raise the water supply in the steam generator equivalent model 2 to a saturated liquid state, ensuring that the water supply in the steam generator equivalent model 2 undergoes a boiling phase change and generates steam.

[0060] Step 5: Adjust the centrifugal variable frequency water pump 406 and the drainage pressure regulating valve 8 in the water supply system 4 to control the drainage pressure, adjust the electric heating element 202 in the steam generator equivalent model 2 to control the heating power, observe the value of the drainage pressure sensor 11 to ensure that the drainage pressure at the outlet of the steam generator equivalent model 2 can be controlled at 0-5atm, observe the value of the steam-liquid two-phase flowmeter 12 to ensure that the steam mass flow rate at the outlet of the steam generator equivalent model 2 can be controlled to account for 10%-40% of the total mass flow rate.

[0061] Step 6: Observe the condensation and drainage conditions of the drainage tank 502 in the drainage system 5 to ensure that the drainage can be smoothly condensed and discharged to the outside.

[0062] (2) Experimental implementation phase

[0063] Step 1: After the test preparation phase, the test boundary construction method is used to determine the control parameters such as temperature, pressure and flow according to the boundary conditions of the steam generator such as high temperature, high pressure, and boiling phase change, so as to simulate the thermal hydraulic behavior of the steam generator under the real working environment through accurate temperature, pressure and flow control systems. According to the requirements of the operation setting conditions, the centrifugal variable frequency water pump 406 and the drainage pressure regulating valve 8 in the water supply system 4 are adjusted to control the drainage pressure to the operation setting conditions, the preheating device 405 in the water supply system 4 is started to the operation setting conditions, and the electric heating element 202 in the steam generator equivalent model 2 is started and adjusted until the water supply is heated to a saturated liquid state, and the water supply is heated to produce steam after the boiling phase change, and the steam mass flow rate accounts for the total mass flow rate to the operation setting conditions.

[0064] Step 2: After the operating conditions are met, run the test device for 5 to 10 minutes and observe the test device to determine whether the operation process is in a steady state, such as whether the sensor parameters such as water supply pressure, water supply temperature, water supply flow, drainage pressure, and vapor-liquid phase ratio are stable.

[0065] Step 3: When the boiling phase change of the steam generator equivalent model 2 is stable and meets the set operating conditions, the vibration shock table 101 is started through the vibration shock table control cabinet 103 in the vibration shock device 1, and the behavior process of the internal flow field thermodynamics and external structural mechanics of the steam generator under impact conditions is simulated by inputting a three-way external load waveform.

[0066] Step 4: Starting from the initial vibration of the vibration impact table 101, use the data acquisition system to obtain data signals such as pressure, temperature, flow, etc. at each measuring point (i.e., the signals of each sensor), and transmit all data signals to the computer in real time for signal filtering and time-frequency domain conversion processing until the vibration impact process is completed and data signal acquisition is stopped.

[0067] Step 5: After the single-condition vibration impact test is completed, the vibration impact table 101 is turned off through the vibration impact table control cabinet 103 in the vibration impact device 1, and the electric heating element 202 in the steam generator equivalent model 2 is further turned off, the preheating device 405 in the water supply system 4 is turned off, the centrifugal variable frequency water pump 406 in the water supply system 4 is turned off, and the cleaning drain pipe 212 in the steam generator equivalent model 2 is opened to drain the remaining boiling water in the steam generator equivalent model 2.

[0068] Step 6: Repeat steps 1 to 5 to carry out multi-condition vibration and shock tests until all test tasks and data collection tasks are completed.

[0069] (3) End of the trial

[0070] Step 1: After repeating and completing the multi-condition vibration shock test according to the external shock scenario, check the data retention records and the list of various test equipment, turn off all electrical equipment, and remove the boiling water / wastewater flowing in the water supply system 4, drainage system 5, and steam generator equivalent model 2.

[0071] Step 2: Disassemble the vibration impact device 1, steam generator equivalent model 2, steam generator fixed bracket 3, water supply system 4, drainage system 5, water supply hose 6, drainage hose 7, drainage pressure regulating valve 8, water supply flow sensor 9, water supply pressure sensor 10, drainage pressure sensor 11, steam-liquid two-phase flowmeter 12 and rubber-plastic thermal insulation materials, and store them in corresponding storage locations.

[0072] Step 3: Analyze the collected data to obtain the stress condition of the steam generator equivalent model 2 under vibration impact. Specifically, the six-degree-of-freedom external load input boundary simulation method can be used to restore the stress condition of the steam generator under external impact load, so as to accurately evaluate the impact resistance of the steam generator under external impact load.

[0073] According to the above process, testers can conduct the impact test of steam generator in an orderly manner to avoid confusion and omissions during the test. This test process can improve the standardization and scientificity of the test and ensure the accuracy and repeatability of the test results. The six-degree-of-freedom external load input boundary simulation method is used to restore the stress condition of the steam generator under external impact load, providing a favorable basis for the design optimization and safety assessment of steam generators in complex environments.

Claims

1. A steam generator impact test device under high temperature and pressure environment, characterized in that: It includes a vibration impact device, a steam generator equivalent model, a steam generator fixing bracket, a water supply system, a drainage system, a water supply flow sensor, a water supply pressure sensor, a drainage pressure sensor and a steam-liquid two-phase flow meter; The steam generator equivalent model and the steam generator fixed support are both installed on the vibration impact device, and the steam generator equivalent model is located at the center of the steam generator fixed support and is supported by the steam generator fixed support; The water supply system, the steam generator equivalent model and the drainage system are connected in sequence, the water supply flow sensor and the water supply pressure sensor are arranged between the water supply system and the steam generator equivalent model, and the drainage pressure sensor and the steam-liquid two-phase flowmeter are arranged between the steam generator equivalent model and the drainage system.

2. The steam generator impact resistance test device under high temperature and pressure environment as claimed in claim 1, characterized in that: The vibration impact device comprises a vibration impact table, a vibration impact table tooling stand and a vibration impact table control cabinet; The vibration shock table control cabinet is used to control the vibration shock table to output vibration shock; The vibration shock table tooling frame is installed on the vibration shock table, and the steam generator equivalent model is installed on the vibration shock table tooling frame.

3. The steam generator impact resistance test device under high temperature and pressure environment as claimed in claim 1, characterized in that: The steam generator equivalent model includes a steam generator base, an electric heating element, an electric heating element base, a plurality of U-shaped tubes, a plurality of support plates, a plurality of insulating rubber buckles at the bottom of the U-shaped tubes, a plurality of built-in spiral metal heating rods, magnesium oxide insulating materials, a metal edging shell, a hot and cold end partition plate, a water delivery branch pipe, and a cleaning and drainage pipe; The electric heating element is mounted on the electric heating element base, the electric heating element base is mounted inside the steam generator base, the plurality of built-in spiral metal heating rods are fixed on the electric heating element, the plurality of built-in spiral metal heating rods are respectively embedded in the plurality of U-shaped tubes, and the magnesium oxide insulating material is filled between the built-in spiral metal heating rods and the U-shaped tubes; The plurality of support plates are used to support the plurality of U-shaped tubes, the ends of the plurality of U-shaped tubes are embedded in the steam generator base, and the insulating rubber buckles at the ends of the U-shaped tubes are wrapped around the ends of the U-shaped tubes; The support plate is fixed on the inner wall of the metal-rimmed shell, the bottom of the metal-rimmed shell is fixed on the steam generator base, the metal-rimmed shell is connected with the water supply branch pipe and the cleaning and drainage pipe respectively, a visualization window is provided on the side wall of the metal-rimmed shell at a position corresponding to the elbow of the U-shaped tube, and the hot and cold end partition plate is fixed on the center line of the U-shaped tube.

4. The steam generator impact resistance test device under high temperature and pressure environment as claimed in claim 3, characterized in that: The electric heating element comprises an electric heating element anode and an electric heating element cathode, and the electric heating element anode and the electric heating element cathode are both fixed on the electric heating element base; the two ends of the built-in spiral metal heating rod are respectively an anode end and a cathode end, and the anode end and the cathode end are respectively fixed on the electric heating element anode and the electric heating element cathode; the anode end and the cathode end correspond to the hot end and the cold end of the U-shaped tube respectively.

5. The steam generator impact resistance test device under high temperature and pressure environment as described in claim 1, characterized in that: The steam generator fixing bracket comprises a bracket body, a steam-liquid two-phase flowmeter supporting bracket, a plurality of supporting bracket cover plates and a metal-edged outer shell circular fixing plate; The bracket body includes a plurality of support rod assemblies evenly arranged along the circumferential direction, and a plurality of support frames are arranged on the inner side of each support rod assembly from top to bottom. One side of the support frame cover is fixed to the end of the support frame, and the other side of the support frame cover is fixed to the side wall of the metal-rimmed shell. A vapor-liquid two-phase flow meter support frame is fixed to the top end of one of the support rod assemblies, and the vapor-liquid two-phase flow meter support frame is used to support the vapor-liquid two-phase flow meter. The circular fixing plate of the metal-rimmed shell is in a circular ring shape, and the circular fixing plate of the metal-rimmed shell is fixed to the support frame on the top layer.

6. The steam generator impact resistance test device under high temperature and pressure environment as claimed in claim 1, characterized in that: The water supply system includes a water supply tank, a preheating device, a centrifugal variable frequency water pump, a flow control valve and a water supply temperature sensor; The top of the water supply tank is provided with a water supply hole and a water supply tank observation port, and the water supply hole is used to connect to an external water source; The water supply tank is communicated with the preheating device, the preheating device is communicated with the water inlet of the centrifugal variable frequency water pump, the water supply temperature sensor is arranged between the preheating device and the centrifugal variable frequency water pump, the water outlet of the centrifugal variable frequency water pump is communicated with the flow control valve, and the flow control valve is communicated with the steam generator equivalent model.

7. The steam generator impact resistance test device under high temperature and pressure environment as claimed in claim 1, characterized in that: The drainage system comprises a drainage water tank and a drainage water tank supporting support; The drainage water tank supporting bracket is used to support the drainage water tank. The drainage water tank is provided with a drainage hole, and the drainage hole is connected to the steam generator equivalent model.

8. The steam generator impact resistance test device under high temperature and pressure environment as claimed in claim 1, characterized in that: The vibration shock table control cabinet is also used to provide working power for the steam generator equivalent model.

9. A test method for a steam generator shock resistance test device under a high temperature and pressurized environment according to any one of claims 1 to 8, characterized in that: include: Step 1: Determine the control parameters of the steam generator equivalent model according to the high temperature, high pressure and boiling phase change boundary conditions of the steam generator, and adjust the water supply system according to the set operating conditions so that the drainage pressure reaches the set operating conditions, start the preheating device in the water supply system to the set operating conditions, start and adjust the steam generator equivalent model until the water supply is heated to a saturated liquid state, so that the water supply is heated to a boiling phase change to generate steam, and the steam mass flow rate accounts for a fraction of the total mass flow rate to the set operating conditions; Step 2: After the steam generator equivalent model meets the requirements of the set operating conditions, the steam generator anti-shock test device is operated continuously for 5 to 10 minutes to ensure whether the operation process of the steam generator anti-shock test device is in a steady state stage; Step 3: When the boiling phase change of the steam generator equivalent model is stable and meets the set operating conditions, the vibration impact device is started to simulate the behavior process of the internal flow field thermodynamics and external structural mechanics of the steam generator under impact conditions by inputting a three-way external load waveform; Step 4: Collect data signals from each sensor and transmit all data signals to the computer for processing in real time; Step 5: After the single-condition vibration impact test is completed, turn off the power of the vibration impact device, the steam generator equivalent model and the water supply system, and remove the remaining boiling water in the steam generator equivalent model; Step 6: Repeat steps 1 to 5 to carry out multi-condition vibration and impact tests until all test data are collected, and restore the stress condition of the steam generator equivalent model under vibration and impact conditions based on the collected data.

10. The method according to claim 9, characterized in that The step six uses a six-degree-of-freedom external load input boundary simulation method to restore the stress condition of the steam generator equivalent model under vibration and impact conditions.

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