High frequency dynamic pressure measuring device and measuring method

Abstract

The present invention discloses a high-frequency dynamic pressure measuring device and a measuring method, the high-frequency dynamic pressure measuring device comprises a main container pressure measuring assembly arranged on the side wall of the main container and / or a steam generator pressure measuring assembly arranged on the steam generator; at least one of the main container pressure measuring assembly and the steam generator pressure measuring assembly comprises an external flange arranged on the side wall of the main container and / or the outside of the steam generator, a connecting flange penetrating the side wall of the main container and / or the steam generator, a cooling assembly and a high-frequency dynamic pressure sensor, the connecting flange is sleeved with the external flange and abuts against the outer end of the external flange; the high-frequency dynamic pressure sensor penetrates the connecting flange, and the cooling assembly is arranged around the periphery of the high-frequency dynamic pressure sensor. The high-frequency dynamic pressure sensor is locally cooled by the cooling assembly, the temperature of the liquid heavy metal near the measuring point is reduced, and the measurement of the high-frequency dynamic pressure in the high-temperature liquid heavy metal environment is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of liquid heavy metal reactor pressure measurement, and in particular to a high-frequency dynamic pressure measurement device and a measurement method. Background Art

[0002] In the case of a liquid heavy metal steam generator heat transfer tube rupture (SGTR) accident, once the steam generator heat transfer tube breaks, the high-pressure and low-temperature supercooled water in the secondary circuit is injected into the high-temperature liquid heavy metal in the primary circuit. Under the dual effects of flash evaporation and heating of the liquid heavy metal, a large amount of gas is generated instantly, causing the primary circuit to face the risk of overpressure. Therefore, in the experimental research of liquid heavy metal SGTR, high-frequency dynamic pressure measurement is crucial. Through high-frequency dynamic pressure measurement, the pressure response characteristics of the primary circuit are obtained and the pressure peak is captured to support the safety analysis of the fourth-generation liquid heavy metal reactor.

[0003] At present, in experimental research at home and abroad, the stable operating temperature of high-frequency dynamic pressure sensors in liquid heavy metals is about 350°C. As the temperature of liquid heavy metals increases, the corrosion resistance, insulation and sealing of high-frequency dynamic pressure sensors are greatly challenged, resulting in huge challenges for high-frequency dynamic pressure sensors to achieve long-term stable measurements in high-temperature liquid heavy metal environments. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high-frequency dynamic pressure measuring device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a high-frequency dynamic pressure measuring device, comprising a main container pressure measuring component arranged on the side wall of the main container and / or a steam generator pressure measuring component arranged on the steam generator;

[0006] At least one of the main container pressure measuring assembly and the steam generator pressure measuring assembly includes an external flange arranged on the side wall of the main container and / or the outside of the steam generator, a connecting flange penetrating the side wall of the main container and / or the steam generator, a cooling assembly and a high-frequency dynamic pressure sensor, the connecting flange is sleeved with the external flange and abuts against the outer end of the external flange; the high-frequency dynamic pressure sensor penetrates the connecting flange, and the cooling assembly is arranged around the outer periphery of the high-frequency dynamic pressure sensor.

[0007] In some embodiments, the cooling assembly includes an inlet pipe, a cooling ring, a top cover and an outlet pipe, and the inlet pipe, the cooling ring and the outlet pipe are connected in sequence; the outer side surface of the cooling ring is fixedly connected to the inner wall surface of the connecting flange, the top cover is connected to the inner side surface of the cooling ring and forms a cavity with the cooling ring for accommodating the probe of the high-frequency dynamic pressure sensor; the top cover is provided with a center hole connected to the cavity, and the center hole is opposite to the probe.

[0008] In some embodiments, the connecting flange includes a flange plate, a barrel section and a mounting section, and the two ends of the barrel section are respectively connected to the flange plate and the mounting section; the flange plate presses against the external flange to achieve limiting, the barrel section is partially sleeved inside the external flange, and the barrel section is partially inserted into the side wall of the main container and / or the top flange of the steam generator; the mounting section is inserted into the side wall of the main container, and / or the mounting section is arranged inside the steam generator.

[0009] In some embodiments, in the steam generator pressure measurement assembly, the connecting flange further comprises an extension cylinder extending axially along the cylinder section, and two ends of the extension cylinder are respectively fixedly connected to the cylinder section and the mounting section.

[0010] In some embodiments, the connecting flange further comprises a heat-insulating sleeve extending along the axial direction of the barrel section, and the heat-insulating sleeve is sleeved on the outer circumference of the barrel section, the extension barrel and / or the installation section.

[0011] In some embodiments, the thermal insulation sleeve is provided with an internal space, and the internal space is evacuated or filled with thermal insulation material.

[0012] In some embodiments, the mounting section is provided with a first mounting hole for accommodating the inlet pipe, a second mounting hole for accommodating the outlet pipe, and a third mounting hole for accommodating the high-frequency dynamic pressure sensor, the first mounting hole, the second mounting hole, and the third mounting hole penetrate axially along the mounting section, and the second mounting hole is provided between the first mounting hole and the third mounting hole.

[0013] In some embodiments, the high-frequency dynamic pressure sensor includes a probe, a connecting section and a cable, the two ends of the connecting section are respectively connected to the probe and the cable, the connecting section is plugged and fixed to the third mounting hole, the probe extends out of the third mounting hole and is partially or completely placed inside the chamber, and the cable extends along the axial direction of the cylinder section and is externally connected to a power supply.

[0014] In some embodiments, the cross-section of the cooling ring is a quadrilateral, and the contact surface between the cooling ring and the connecting flange is a plane.

[0015] In some embodiments, the length of the outlet pipe is greater than the axial length of the mounting section and less than the axial length of the connecting flange.

[0016] The present invention also constructs a high-frequency dynamic pressure measurement method, using any of the high-frequency dynamic pressure measurement devices described above;

[0017] The high-frequency dynamic pressure measurement method comprises: connecting and fixing a main container pressure measurement component through a side wall of the main container, and sealingly connecting a peripheral side of the main container pressure measurement component to a wall surface of the main container;

[0018] The steam generator pressure measurement assembly passes through the top flange for connection and fixation, and the peripheral side of the steam generator pressure measurement assembly is sealed and connected to the top flange, and the bottom position of the high-frequency dynamic pressure sensor of the steam generator pressure measurement assembly is close to or flush with the height of the pre-broken position of the heat transfer tube;

[0019] Passing coolant through the cooling assembly of the main container pressure measuring assembly and the cooling assembly of the steam generator pressure measuring assembly respectively;

[0020] Finally, the pre-break is blasted, and the high-frequency dynamic pressure sensor of the main container pressure measuring assembly and the high-frequency dynamic pressure sensor of the steam generator pressure measuring assembly respectively measure the high-frequency dynamic pressure at their respective locations.

[0021] By implementing the present invention, the following beneficial effects are achieved:

[0022] The high-frequency dynamic pressure measuring device of the present invention measures high-frequency dynamic pressure through a high-frequency dynamic pressure sensor. The cooling component is arranged around the outer periphery of the high-frequency dynamic pressure sensor. The high-frequency dynamic pressure sensor can be locally cooled by the cooling component, and the temperature of the liquid heavy metal near the measuring point can be reduced, thereby ensuring the measurement of high-frequency dynamic pressure in a high-temperature liquid heavy metal environment.

[0023] The high-frequency dynamic pressure measurement method of the present invention uses a high-frequency dynamic pressure measurement device; the high-frequency dynamic pressure measurement method comprises: connecting and fixing a main container pressure measurement component through the side wall of the main container, and the peripheral side of the main container pressure measurement component is sealed and connected to the wall of the main container; the steam generator pressure measurement component is connected and fixed through the top flange, and the peripheral side of the steam generator pressure measurement component is sealed and connected to the top flange, and the bottom position of the high-frequency dynamic pressure sensor of the steam generator pressure measurement component is close to or flush with the height of the pre-break position of the heat transfer tube; passing coolant through the cooling component of the main container pressure measurement component and the cooling component of the steam generator pressure measurement component respectively; finally, blasting the pre-break, and the high-frequency dynamic pressure sensor of the main container pressure measurement component and the high-frequency dynamic pressure sensor of the steam generator pressure measurement component respectively measure the high-frequency dynamic pressure at their respective locations. The cooling components of the main container pressure measuring component and the steam generator pressure measuring component can locally cool the high-frequency dynamic pressure sensor and reduce the temperature of the liquid heavy metal near the measuring point, thereby ensuring the normal measurement of the high-frequency dynamic pressure in the high-temperature liquid heavy metal environment. The high-frequency dynamic pressure at the rupture position is measured by the high-frequency dynamic pressure sensor of the main container pressure measuring component, and the high-frequency dynamic pressure in the main container is measured by the high-frequency dynamic pressure sensor of the steam generator pressure measuring component, which can be used for safety analysis of the high-temperature liquid heavy metal environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 is a structural schematic diagram of a high-frequency dynamic pressure measurement device according to a first embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the pressure measurement assembly of the main container;

[0027] Figure 3 yes Figure 2 Schematic diagram of the structure of the connecting flange;

[0028] Figure 4 yes Figure 1 A schematic diagram of the structure of the steam generator pressure measurement assembly;

[0029] Figure 5 yes Figure 4 Schematic diagram of the structure of the connecting flange;

[0030] Figure 6 yes Figure 4 Another structural schematic diagram of the steam generator pressure measurement component. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0032] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0034] The high-frequency dynamic pressure measuring device of the present invention is used for measuring pressure in a high-temperature liquid heavy metal environment, such as measuring pressure in a simulated liquid heavy metal SGTR accident, wherein the following is a partial structure for creating a high-temperature liquid heavy metal environment, such as a simulated liquid heavy metal SGTR accident: including a main container 300, a main container flange 400, a steam generator 500, a top flange 600, a heat transfer pipe 700 and a high-frequency dynamic pressure measuring device. The main container 300 is sealedly connected to the main container flange 400, the steam generator 500 is installed through the main container flange 400 and placed in the main container 300, and the top flange 600 is connected to the top of the steam generator 500 and pressed against the upper part of the main container flange 400. The heat transfer pipe 700 is connected and fixed to the top flange 600 and extends along the axial direction of the steam generator 500, and the heat transfer pipe 700 is provided with a pre-break 800. Liquid heavy metal is respectively contained in the interior of the main container 300 and the steam generator 500 to simulate the liquid heavy metal environment in the reactor. The pre-break 800 is broken to simulate a liquid heavy metal SGTR accident. It can be understood that simulating a liquid heavy metal SGTR accident is only one use scenario of the present invention and is not intended to limit the high-frequency dynamic pressure measurement device and high-frequency dynamic pressure measurement method of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1 Embodiment 1 of the present invention discloses a high-frequency dynamic pressure measuring device, including a main container pressure measuring assembly 100 disposed on the side wall of a main container 300 and a steam generator pressure measuring assembly 200 disposed on a steam generator 500 .

[0037] See also Figure 2 The main container pressure measurement assembly 100 penetrates the side wall of the main container 300 and is connected and fixed, and the peripheral side of the main container pressure measurement assembly 100 is sealed and connected to the wall surface of the main container 300. Among them, the main container pressure measurement assembly 100 includes an external flange 1-1 arranged on the side wall of the main container 300, a connecting flange 2-1 that penetrates the side wall of the main container 300, a cooling assembly 3-1 and a high-frequency dynamic pressure sensor 4-1. The connecting flange 2-1 is sleeved with the external flange 1-1 and abuts against the outer end of the external flange 1-1. The high-frequency dynamic pressure sensor 4-1 penetrates the connecting flange 2-1, and the cooling assembly 3-1 is arranged around the outer periphery of the high-frequency dynamic pressure sensor 4-1.

[0038] Specifically, a through hole is provided on the side wall of the main container 300, and the external flange 1-1 is provided on the peripheral side of the through hole and fixedly connected to the outside of the side wall of the main container 300, for example, by welding or screwing. The connecting flange 2-1 is fixedly inserted into the through hole and sealed against the wall of the through hole, and the connecting flange 2-1 is partially pressed against the external flange 1-1 to achieve axial limitation of the connecting flange 2-1.

[0039] The cooling assembly 3-1 is used to cool the high-frequency dynamic pressure sensor 4-1, and includes an inlet pipe 31-1, a cooling ring 32-1, a top cover 33-1 and an outlet pipe 34-1. The inlet pipe 31-1, the cooling ring 32-1 and the outlet pipe 34-1 are connected in sequence. The outer side surface of the cooling ring 32-1 is fixedly connected to the inner wall surface of the connecting flange 2-1, and the top cover 33-1 is connected to the inner side surface of the cooling ring 32-1 and forms a chamber 35-1 with the cooling ring 32-1 for accommodating the probe 41-1 of the high-frequency dynamic pressure sensor 4-1. The top cover 33-1 is provided with a central hole 36-1 connected to the chamber 35-1, and the central hole 36-1 is opposite to the probe 41-1.

[0040] The inlet pipe 31-1 is connected to an external coolant source and has a length greater than the axial length of the connecting flange 2-1. The length of the outlet pipe 34-1 is greater than the axial length of the mounting section 23-1 and less than the axial length of the connecting flange 2-1. The outlet pipe 34-1 is short so that the high-speed airflow flowing out of the outlet pipe 34-1 can cool the cable of the high-frequency dynamic pressure sensor 4-1.

[0041] The cooling ring 32-1 is a pipe connected end to end, and the cross section of the cooling ring 32-1 is a quadrilateral. The contact surface between the cooling ring 32-1 and the connecting flange 2-1 is a plane, so that the cooling ring 32-1 can be in close contact with the connecting flange 2-1 and increase the contact area between the coolant and the connecting flange 2-1, that is, increase the heat exchange area. To be precise, the cooling ring 32-1 is a hollow ring structure, and the flow cross section is a quadrilateral. The inner diameter of the cooling ring 32-1 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-1, that is, the diameter of the opening is as close as possible to the outer diameter of the high-frequency dynamic pressure sensor 4-1, which can reduce the temperature of the probe 41-1 of the high-frequency dynamic pressure sensor 4-1 and its vicinity.

[0042] The cooling ring 32-1 is arranged to protrude from the inner wall surface of the side wall of the main container 300, and the top cover 33-1 is naturally arranged to protrude from the inner wall surface of the side wall of the main container 300. The top cover 33-1 can change the flow field of the liquid heavy metal, so that the liquid heavy metal flows around the main container pressure measurement component 100, and prevents the high-temperature liquid heavy metal from entering the chamber 35-1 of the cooling component 3-1, thereby heating the probe 41-1 of the high-frequency dynamic pressure sensor 4-1. A center hole 36-1 is arranged at the center position of the top cover 33-1, and the liquid heavy metal can enter the chamber 35-1 of the cooling component 3-1 through the center hole 36-1. When the pressure in the liquid heavy metal domain fluctuates, the pressure wave can be transmitted through the center hole 36-1 to the probe 41-1 of the high-frequency dynamic pressure sensor 4-1.

[0043] See also Figure 3The connecting flange 2-1 is used to fix and install the cooling assembly 3-1 and the high-frequency dynamic pressure sensor 4-1, and includes a flange 21-1, a barrel section 22-1 and a mounting section 23-1. The two ends of the barrel section 22-1 are respectively connected to the flange 21-1 and the mounting section 23-1. The flange 21-1 presses against the external flange 1-1 to achieve positioning, and the barrel section 22-1 is partially sleeved inside the external flange 1-1, and the barrel section 22-1 is partially inserted into the side wall of the main container 300. The mounting section 23-1 is inserted into the side wall of the main container 300.

[0044] The mounting section 23-1 is provided with a first mounting hole 231-1 for accommodating the inlet pipe 31-1, a second mounting hole 232-1 for accommodating the outlet pipe 34-1, and a third mounting hole 233-1 for accommodating the high-frequency dynamic pressure sensor 4-1. The first mounting hole 231-1, the second mounting hole 232-1, and the third mounting hole 233-1 penetrate the mounting section 23-1 axially, and the second mounting hole 232-1 is provided between the first mounting hole 231-1 and the third mounting hole 233-1. The inner diameter of the first mounting hole 231-1 is slightly larger than the outer diameter of the water inlet pipe, the inner diameter of the second mounting hole 232-1 is slightly larger than the outer diameter of the outlet pipe 34-1, and the inner diameter of the third mounting hole 233-1 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-1.

[0045] The high-frequency dynamic pressure sensor 4-1 is used to measure the high-frequency dynamic pressure in the main container 300, and includes a probe 41-1, a connecting section 42-1 and a cable 43-1. The two ends of the connecting section 42-1 are respectively connected to the probe 41-1 and the cable 43-1. The connecting section 42-1 is plugged and fixed to the third mounting hole 233-1. The probe 41-1 extends out of the third mounting hole 233-1 and is partially or completely placed inside the chamber 35-1. The cable 43-1 extends along the axial direction of the barrel section 22-1 and is externally connected to a power supply. Preferably, the connecting section 42-1 is screwed and fixed with the third mounting hole 233-1, and the third mounting hole 233-1 includes a threaded section with an inner diameter slightly larger than the connecting section 42-1 and a limiting section with an outer diameter slightly larger than the probe 41-1, the inner diameter of the limiting section is smaller than the inner diameter of the threaded section, the threaded section is used to be screwed and fixed with the third mounting hole 233-1, and the limiting section is used to limit the installation depth of the high-frequency dynamic pressure sensor 4-1 entering the third mounting hole 233-1 and allow the probe 41-1 to pass through and accommodate part of the probe 41-1. The limiting section and the threaded section are not shown in the figure.

[0046] See also Figure 4, the steam generator pressure measurement assembly 200 is connected and fixed through the top flange 600, and the peripheral side of the steam generator pressure measurement assembly 200 is sealed and connected to the wall of the top flange 600. Among them, the steam generator pressure measurement assembly 200 includes an external flange 1-2 arranged outside the steam generator 500, a connecting flange 2-2 that passes through the steam generator 500, a cooling assembly 3-2 and a high-frequency dynamic pressure sensor 4-2. The connecting flange 2-2 is sleeved with the external flange 1-2 and abuts against the outer end of the external flange 1-2. The high-frequency dynamic pressure sensor 4-2 passes through the connecting flange 2-2, and the cooling assembly 3-2 is arranged around the outer periphery of the high-frequency dynamic pressure sensor 4-2. The bottom position of the high-frequency dynamic pressure sensor 4-2 is close to or flush with the position of the pre-break 800, and can accurately measure the high-frequency dynamic pressure when the pre-break 800 breaks. The pre-break 800 refers to a pipe wall that is easy to burst or break and is pre-set at the corresponding position of the heat transfer tube 700. The specific position is set according to actual needs. Later, blasting or breaking operations are performed when necessary. The specific operations are not the focus of the present invention and will not be described in detail here. Among them, the external flange 1-2 of the steam generator pressure measurement component 200 can be other flange structures outside the top flange 600. Figure 6 As shown, the external flange 1 - 2 of the steam generator pressure measurement assembly 200 may also be directly replaced by the top flange 600 , which is specifically set according to actual needs.

[0047] In some embodiments, the top flange 600 is provided with a through hole extending through the top flange 600 in the axial direction, and the external flange 1-2 is provided on the peripheral side of the through hole and fixedly connected to the top flange 600, for example, by welding or screwing. Alternatively, the external flange 1-2 is the top flange 600, and the connecting flange 2-2 is fixedly inserted into the through hole and sealed against the wall of the through hole, and the connecting flange 2-2 is partially pressed against the top flange 600 to achieve axial limitation of the connecting flange 2-2.

[0048] The cooling assembly 3-2 is used to cool the high-frequency dynamic pressure sensor 4-2, and includes an inlet pipe 31-2, a cooling ring 32-2, a top cover 33-2, and an outlet pipe 34-2. The inlet pipe 31-2, the cooling ring 32-2, and the outlet pipe 34-2 are connected in sequence. The outer side surface of the cooling ring 32-2 is fixedly connected to the inner wall surface of the connecting flange 2-2, and the top cover 33-2 is connected to the inner side surface of the cooling ring 32-2 and forms a chamber 35-2 with the cooling ring 32-2 for accommodating the probe 41-2 of the high-frequency dynamic pressure sensor 4-2. The top cover 33-2 is provided with a center hole 36-2 connected to the chamber 35-2, and the center hole 36-2 is opposite to the probe 41-2.

[0049] The inlet pipe 31-2 is connected to an external coolant source and has a length greater than the axial length of the connecting flange 2-2. The length of the outlet pipe 34-2 is greater than the axial length of the mounting section 23-2 and less than the axial length of the connecting flange 2-2. The outlet pipe 34-2 is short so that the high-speed airflow flowing out of the outlet pipe 34-2 can cool the cable of the high-frequency dynamic pressure sensor 4-2.

[0050] The cooling ring 32-2 is a pipe connected end to end, and the cross-section of the cooling ring 32-2 is a quadrilateral. The contact surface between the cooling ring 32-2 and the connecting flange 2-2 is a plane, so that the cooling ring 32-2 can be in close contact with the connecting flange 2-2 and increase the contact area between the coolant and the connecting flange 2-2, that is, increase the heat exchange area. To be precise, the cooling ring 32-2 is a hollow ring structure, and the flow cross-section is a quadrilateral. The inner diameter of the cooling ring 32-2 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-2, that is, the diameter of the opening is as close as possible to the outer diameter of the high-frequency dynamic pressure sensor 4-2, which can reduce the temperature of the probe 41-2 of the high-frequency dynamic pressure sensor 4-2 and its vicinity.

[0051] The top cover 33-2 is a plate-like structure and has the same shape as the cross-sectional structure of the cooling ring 32-2. It can change the flow field of the liquid heavy metal, so that the liquid heavy metal flows around the steam generator pressure measurement assembly 200, and prevents the high-temperature liquid heavy metal from entering the chamber 35-2 of the cooling assembly 3-2, thereby heating the probe 41-2 of the high-frequency dynamic pressure sensor 4-2. A center hole 36-2 is set at the center position of the top cover 33-2, and the liquid heavy metal can enter the chamber 35-2 of the cooling assembly 3-2 through the center hole 36-2. When the pressure in the liquid heavy metal domain fluctuates, the pressure wave can be transmitted through the center hole 36-2 to the probe 41-2 of the high-frequency dynamic pressure sensor 4-2.

[0052] See also Figure 5 The connecting flange 2-2 is used for fixing and installing the cooling assembly 3-2 and the high-frequency dynamic pressure sensor 4-2, and includes a flange 21-2, a barrel section 22-2 and a mounting section 23-2. The two ends of the barrel section 22-2 are respectively connected to the flange 21-2 and the mounting section 23-2. The flange 21-2 presses against the external flange 1-2 to achieve position limiting, the barrel section 22-2 is partially sleeved inside the external flange 1-2, and the barrel section 22-2 is partially inserted into the side wall of the steam generator 500, and the mounting section 23-2 is arranged inside the steam generator 500.

[0053] The mounting section 23-2 is provided with a first mounting hole 231-2 for accommodating the inlet pipe 31-2, a second mounting hole 232-2 for accommodating the outlet pipe 34-2 and a third mounting hole 233-2 for accommodating the high-frequency dynamic pressure sensor 4-2. The first mounting hole 231-2, the second mounting hole 232-2 and the third mounting hole 233-2 penetrate axially along the mounting section 23-2, and the second mounting hole 232-2 is provided between the first mounting hole 231-2 and the third mounting hole 233-2.

[0054] The high-frequency dynamic pressure sensor 4-2 is used to measure the high-frequency dynamic pressure in the steam generator 500, and includes a probe 41-2, a connecting section 42-2 and a cable 43-2. ​​The two ends of the connecting section 42-2 are respectively connected to the probe 41-2 and the cable 43-2. ​​The connecting section 42-2 is plugged and fixed to the third mounting hole 233-2. The probe 41-2 extends out of the third mounting hole 233-2 and is partially or completely placed inside the chamber 35-2. The cable 43-2 extends along the axial direction of the cylinder section 22-2 and is externally connected to a power supply.

[0055] In some embodiments, in the steam generator pressure measurement assembly 200, the connection flange 2-2 further includes an extension cylinder 24 extending axially along the cylinder section 22-2, and the two ends of the extension cylinder 24 are respectively fixedly connected to the cylinder section 22-2 and the installation section 23-2. Correspondingly, the inlet pipe 31-2 and the cable 43-2 are respectively increased by the same length as the extension cylinder 24. Among them, the axial length of the extension cylinder 24 is related to the position of the pre-break 800 of the heat transfer tube 700, that is, the overall length of the connection flange 2-2 makes the position of the probe 41-2 close to or flush with the position of the pre-break 800.

[0056] The connecting flange 2-2 also includes a heat-insulating sleeve 25 extending along the axial direction of the barrel section 22-2, and the heat-insulating sleeve 25 is sleeved on the outer periphery of the barrel section 22-2, the extension barrel 24 and / or the installation section 23-2. For example, the heat-insulating sleeve 25 is sleeved on the outside of the barrel section 22-2 and the extension barrel 24, and can isolate the heating effect of the high-temperature liquid heavy metal and the air space on the cable 43-2 and the coolant of the high-frequency dynamic pressure sensor 4-2; the heat-insulating sleeve 25 is sleeved on the outside of the installation section 23-2, and can isolate the heating effect of the high-temperature liquid heavy metal and the air space on the probe 41-2 and the coolant of the high-frequency dynamic pressure sensor 4-2. Generally, the heat-insulating sleeve 25 is provided with an internal space, and the internal space is evacuated or filled with thermal insulation materials to achieve heat insulation.

[0057] Embodiment 2:

[0058] The second embodiment of the present invention discloses a high-frequency dynamic pressure measurement device, which can be used for pressure measurement at a single location in a high-temperature liquid heavy metal environment, such as pressure measurement inside the main container 300 .

[0059] The high frequency dynamic pressure measuring device comprises a main container pressure measuring assembly 100 disposed on the side wall of the main container 300. Figure 2 The main container pressure measurement assembly 100 penetrates the side wall of the main container 300 and is connected and fixed, and the peripheral side of the main container pressure measurement assembly 100 is sealed and connected to the wall surface of the main container 300. Among them, the main container pressure measurement assembly 100 includes an external flange 1-1 arranged on the side wall of the main container 300, a connecting flange 2-1 that penetrates the side wall of the main container 300, a cooling assembly 3-1 and a high-frequency dynamic pressure sensor 4-1. The connecting flange 2-1 is sleeved with the external flange 1-1 and abuts against the outer end of the external flange 1-1. The high-frequency dynamic pressure sensor 4-1 penetrates the connecting flange 2-1, and the cooling assembly 3-1 is arranged around the outer periphery of the high-frequency dynamic pressure sensor 4-1.

[0060] Specifically, a through hole is provided on the side wall of the main container 300, and the external flange 1-1 is provided on the peripheral side of the through hole and fixedly connected to the outside of the side wall of the main container 300, for example, by welding or screwing. The connecting flange 2-1 is fixedly inserted into the through hole and sealed against the wall of the through hole, and the connecting flange 2-1 is partially pressed against the external flange 1-1 to achieve axial limitation of the connecting flange 2-1.

[0061] The cooling assembly 3-1 is used to cool the high-frequency dynamic pressure sensor 4-1, and includes an inlet pipe 31-1, a cooling ring 32-1, a top cover 33-1 and an outlet pipe 34-1. The inlet pipe 31-1, the cooling ring 32-1 and the outlet pipe 34-1 are connected in sequence. The outer side surface of the cooling ring 32-1 is fixedly connected to the inner wall surface of the connecting flange 2-1, and the top cover 33-1 is connected to the inner side surface of the cooling ring 32-1 and forms a chamber 35-1 with the cooling ring 32-1 for accommodating the probe 41-1 of the high-frequency dynamic pressure sensor 4-1. The top cover 33-1 is provided with a central hole 36-1 connected to the chamber 35-1, and the central hole 36-1 is opposite to the probe 41-1.

[0062] The inlet pipe 31-1 is connected to an external coolant source and has a length greater than the axial length of the connecting flange 2-1. The length of the outlet pipe 34-1 is greater than the axial length of the mounting section 23-1 and less than the axial length of the connecting flange 2-1. The outlet pipe 34-1 is short so that the high-speed airflow flowing out of the outlet pipe 34-1 can cool the cable of the high-frequency dynamic pressure sensor 4-1.

[0063] The cooling ring 32-1 is a pipe connected end to end, and the cross section of the cooling ring 32-1 is a quadrilateral. The contact surface between the cooling ring 32-1 and the connecting flange 2-1 is a plane, so that the cooling ring 32-1 can be in close contact with the connecting flange 2-1 and increase the contact area between the coolant and the connecting flange 2-1, that is, increase the heat exchange area. To be precise, the cooling ring 32-1 is a hollow ring structure, and the flow cross section is a quadrilateral. The inner diameter of the cooling ring 32-1 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-1, that is, the diameter of the opening is as close as possible to the outer diameter of the high-frequency dynamic pressure sensor 4-1, which can reduce the temperature of the probe 41-1 of the high-frequency dynamic pressure sensor 4-1 and its vicinity.

[0064] The cooling ring 32-1 is arranged to protrude from the inner wall surface of the side wall of the main container 300, and the top cover 33-1 is arranged to protrude from the inner wall surface of the side wall of the main container 300. The top cover 33-1 is a plate-like structure and has the same shape as the cross-sectional structure of the cooling ring 32-1. It can change the flow field of the liquid heavy metal, so that the liquid heavy metal flows around the main container pressure measurement component 100, and prevents the high-temperature liquid heavy metal from entering the chamber 35-1 of the cooling component 3-1, thereby heating the probe 41-1 of the high-frequency dynamic pressure sensor 4-1. A center hole 36-1 is set at the center position of the top cover 33-1, and the liquid heavy metal can enter the chamber 35-1 of the cooling component 3-1 through the center hole 36-1. When the pressure in the liquid heavy metal domain fluctuates, the pressure wave can be transmitted through the center hole 36-1 to the probe 41-1 of the high-frequency dynamic pressure sensor 4-1.

[0065] See also Figure 3 The connecting flange 2-1 is used to fix and install the cooling assembly 3-1 and the high-frequency dynamic pressure sensor 4-1, and includes a flange 21-1, a barrel section 22-1 and a mounting section 23-1. The two ends of the barrel section 22-1 are respectively connected to the flange 21-1 and the mounting section 23-1. The flange 21-1 presses against the external flange 1-1 to achieve positioning, and the barrel section 22-1 is partially sleeved inside the external flange 1-1, and the barrel section 22-1 is partially inserted into the side wall of the main container 300. The mounting section 23-1 is inserted into the side wall of the main container 300.

[0066] The mounting section 23-1 is provided with a first mounting hole 231-1 for accommodating the inlet pipe 31-1, a second mounting hole 232-1 for accommodating the outlet pipe 34-1, and a third mounting hole 233-1 for accommodating the high-frequency dynamic pressure sensor 4-1. The first mounting hole 231-1, the second mounting hole 232-1, and the third mounting hole 233-1 penetrate the mounting section 23-1 axially, and the second mounting hole 232-1 is provided between the first mounting hole 231-1 and the third mounting hole 233-1. The inner diameter of the first mounting hole 231-1 is slightly larger than the outer diameter of the water inlet pipe, the inner diameter of the second mounting hole 232-1 is slightly larger than the outer diameter of the outlet pipe 34-1, and the inner diameter of the third mounting hole 233-1 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-1.

[0067] The high-frequency dynamic pressure sensor 4-1 is used to measure the high-frequency dynamic pressure in the main container 300, and includes a probe 41-1, a connecting section 42-1 and a cable 43-1. The two ends of the connecting section 42-1 are respectively connected to the probe 41-1 and the cable 43-1. The connecting section 42-1 is plugged and fixed to the third mounting hole 233-1. The probe 41-1 extends out of the third mounting hole 233-1 and is partially or completely placed inside the chamber 35-1. The cable 43-1 extends along the axial direction of the barrel section 22-1 and is externally connected to a power supply. Preferably, the connecting section 42-1 is screwed and fixed with the third mounting hole 233-1, and the third mounting hole 233-1 includes a threaded section with an inner diameter slightly larger than the connecting section 42-1 and a limiting section with an outer diameter slightly larger than the probe 41-1, the inner diameter of the limiting section is smaller than the inner diameter of the threaded section, the threaded section is used to be screwed and fixed with the third mounting hole 233-1, and the limiting section is used to limit the installation depth of the high-frequency dynamic pressure sensor 4-1 entering the third mounting hole 233-1 and allow the probe 41-1 to pass through and accommodate part of the probe 41-1. The limiting section and the threaded section are not shown in the figure.

[0068] Embodiment three:

[0069] Embodiment 3 of the present invention discloses a high-frequency dynamic pressure measurement device, which can be used for pressure measurement at a single location in a high-temperature liquid heavy metal environment, such as internal pressure measurement of a steam generator 500 .

[0070] The high frequency dynamic pressure measuring device comprises a steam generator pressure measuring assembly 200 disposed on a steam generator 500. Figure 4, the steam generator pressure measurement assembly 200 is connected and fixed through the top flange 600, and the peripheral side of the steam generator pressure measurement assembly 200 is sealed and connected to the wall of the top flange 600. Among them, the steam generator pressure measurement assembly 200 includes an external flange 1-2 arranged outside the steam generator 500, a connecting flange 2-2 that passes through the steam generator 500, a cooling assembly 3-2 and a high-frequency dynamic pressure sensor 4-2. The connecting flange 2-2 is sleeved with the external flange 1-2 and abuts against the outer end of the external flange 1-2. The high-frequency dynamic pressure sensor 4-2 passes through the connecting flange 2-2, and the cooling assembly 3-2 is arranged around the outer periphery of the high-frequency dynamic pressure sensor 4-2. The bottom position of the high-frequency dynamic pressure sensor 4-2 is close to or flush with the position of the pre-break 800, and can accurately measure the high-frequency dynamic pressure when the pre-break 800 breaks. The pre-break 800 refers to a pipe wall that is easy to burst or break and is pre-set at the corresponding position of the heat transfer tube 700. The specific position is set according to actual needs. Later, blasting or breaking operations are performed when necessary. The specific operations are not the focus of the present invention and will not be described in detail here. Among them, the external flange 1-2 of the steam generator pressure measurement component 200 can be other flange structures outside the top flange 600. Figure 6 As shown, the external flange 1 - 2 of the steam generator pressure measurement assembly 200 may also be directly replaced by the top flange 600 , which is specifically set according to actual needs.

[0071] Specifically, the top flange 600 is provided with a through hole extending through the top flange 600 in the axial direction, and the external flange 1-2 is provided on the peripheral side of the through hole and fixedly connected to the top flange 600, for example, by welding or screwing. Alternatively, the external flange 1-2 is the top flange 600, and the connecting flange 2-2 is fixedly inserted into the through hole and sealed against the wall of the through hole, and the connecting flange 2-2 is partially pressed against the external flange 1-2 to achieve axial limitation of the connecting flange 2-2.

[0072] The cooling assembly 3-2 is used to cool the high-frequency dynamic pressure sensor 4-2, and includes an inlet pipe 31-2, a cooling ring 32-2, a top cover 33-2, and an outlet pipe 34-2. The inlet pipe 31-2, the cooling ring 32-2, and the outlet pipe 34-2 are connected in sequence. The outer side surface of the cooling ring 32-2 is fixedly connected to the inner wall surface of the connecting flange 2-2, and the top cover 33-2 is connected to the inner side surface of the cooling ring 32-2 and forms a chamber 35-2 with the cooling ring 32-2 for accommodating the probe 41-2 of the high-frequency dynamic pressure sensor 4-2. The top cover 33-2 is provided with a center hole 36-2 connected to the chamber 35-2, and the center hole 36-2 is opposite to the probe 41-2.

[0073] The inlet pipe 31-2 is connected to an external coolant source and has a length greater than the axial length of the connecting flange 2-2. The length of the outlet pipe 34-2 is greater than the axial length of the mounting section 23-2 and less than the axial length of the connecting flange 2-2. The outlet pipe 34-2 is short so that the high-speed airflow flowing out of the outlet pipe 34-2 can cool the cable of the high-frequency dynamic pressure sensor 4-2.

[0074] The cooling ring 32-2 is a pipe connected end to end, and the cross-section of the cooling ring 32-2 is a quadrilateral. The contact surface between the cooling ring 32-2 and the connecting flange 2-2 is a plane, so that the cooling ring 32-2 can be in close contact with the connecting flange 2-2 and increase the contact area between the coolant and the connecting flange 2-2, that is, increase the heat exchange area. To be precise, the cooling ring 32-2 is a hollow ring structure, and the flow cross-section is a quadrilateral. The inner diameter of the cooling ring 32-2 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-2, that is, the diameter of the opening is as close as possible to the outer diameter of the high-frequency dynamic pressure sensor 4-2, which can reduce the temperature of the probe 41-2 of the high-frequency dynamic pressure sensor 4-2 and its vicinity.

[0075] The top cover 33-2 is a plate-like structure and has the same shape as the cross-sectional structure of the cooling ring 32-2. It can change the flow field of the liquid heavy metal, so that the liquid heavy metal flows around the steam generator measurement assembly 200, and prevents the high-temperature liquid heavy metal from entering the chamber 35-2 of the cooling assembly 3-2, thereby heating the probe 41-2 of the high-frequency dynamic pressure sensor 4-2. A center hole 36-2 is set at the center position of the top cover 33-2, and the liquid heavy metal can enter the chamber 35-2 of the cooling assembly 3-2 through the center hole 36-2. When the pressure in the liquid heavy metal domain fluctuates, the pressure wave can be transmitted through the center hole 36-2 to the probe 41-2 of the high-frequency dynamic pressure sensor 4-2.

[0076] See also Figure 5 The connecting flange 2-2 is used for fixing and installing the cooling assembly 3-2 and the high-frequency dynamic pressure sensor 4-2, and includes a flange 21-2, a barrel section 22-2 and a mounting section 23-2. The two ends of the barrel section 22-2 are respectively connected to the flange 21-2 and the mounting section 23-2. The flange 21-2 presses against the external flange 1-2 to achieve position limiting, the barrel section 22-2 is partially sleeved inside the external flange 1-2, and the barrel section 22-2 is partially inserted into the side wall of the steam generator 500, and the mounting section 23-2 is arranged inside the steam generator 500.

[0077] The mounting section 23-2 is provided with a first mounting hole 231-2 for accommodating the inlet pipe 31-2, a second mounting hole 232-2 for accommodating the outlet pipe 34-2, and a third mounting hole 233-2 for accommodating the high-frequency dynamic pressure sensor 4-2. The first mounting hole 231-2, the second mounting hole 232-2, and the third mounting hole 233-2 penetrate the mounting section 23-2 axially, and the second mounting hole 232-2 is arranged between the first mounting hole 231-2 and the third mounting hole 233-2. Among them, the inner diameter of the first mounting hole 231-2 is slightly larger than the outer diameter of the water inlet pipe, the inner diameter of the second mounting hole 232-2 is slightly larger than the outer diameter of the outlet pipe 34-2, and the inner diameter of the third mounting hole 233-2 is slightly larger than the outer diameter of the high-frequency dynamic pressure sensor 4-2.

[0078] The high-frequency dynamic pressure sensor 4-2 is used to measure the high-frequency dynamic pressure in the steam generator 500, and includes a probe 41-2, a connecting section 42-2 and a cable 43-2. ​​The two ends of the connecting section 42-2 are respectively connected to the probe 41-2 and the cable 43-2. ​​The connecting section 42-2 is plugged and fixed to the third mounting hole 233-2. The probe 41-2 extends out of the third mounting hole 233-2 and is partially or completely placed inside the chamber 35-2. The cable 43-2 extends along the axial direction of the cylinder section 22-2 and is externally connected to a power supply. Preferably, the connecting section 42-2 is screwed and fixed with the third mounting hole 233-2, and the third mounting hole 233-2 includes a threaded section with an inner diameter slightly larger than the connecting section 42-2 and a limiting section with an outer diameter slightly larger than the probe 41-2, the inner diameter of the limiting section is smaller than the inner diameter of the threaded section, the threaded section is used to be screwed and fixed with the third mounting hole 233-2, and the limiting section is used to limit the installation depth of the high-frequency dynamic pressure sensor 4-2 entering the third mounting hole 233-2 and to allow the probe 41-2 to pass through and accommodate part of the probe 41-2. The limiting section and the threaded section are not shown in the figure.

[0079] In some embodiments, in the steam generator pressure measurement assembly 200, the connection flange 2-2 further includes an extension cylinder 24 extending axially along the cylinder section 22-2, and the two ends of the extension cylinder 24 are respectively fixedly connected to the cylinder section 22-2 and the installation section 23-2. Correspondingly, the inlet pipe 31-2 and the cable 43-2 are respectively increased by the same length as the extension cylinder 24. Among them, the axial length of the extension cylinder 24 is related to the position of the pre-break 800 of the heat transfer tube 700, that is, the overall length of the connection flange 2-2 makes the position of the probe 41-2 close to or flush with the position of the pre-break 800.

[0080] The connecting flange 2-2 also includes a heat-insulating sleeve 25 extending along the axial direction of the barrel section 22-2, and the heat-insulating sleeve 25 is sleeved on the outer periphery of the barrel section 22-2, the extension barrel 24 and / or the installation section 23-2. For example, the heat-insulating sleeve 25 is sleeved on the outside of the barrel section 22-2 and the extension barrel 24, and can isolate the heating effect of the high-temperature liquid heavy metal and the air space on the cable 43-2 and the coolant of the high-frequency dynamic pressure sensor 4-2; the heat-insulating sleeve 25 is sleeved on the outside of the installation section 23-2, and can isolate the heating effect of the high-temperature liquid heavy metal and the air space on the probe 41-2 and the coolant of the high-frequency dynamic pressure sensor 4-2. Generally, the heat-insulating sleeve 25 is provided with an internal space, and the internal space is evacuated or filled with thermal insulation materials to achieve heat insulation.

[0081] Embodiment 4:

[0082] Embodiment 4 of the present invention discloses a high-frequency dynamic pressure measurement method, which uses the high-frequency dynamic pressure measurement device of embodiment 1 to measure pressure in a high-temperature liquid heavy metal environment, such as simulating pressure measurement in a liquid heavy metal SGTR accident.

[0083] The high-frequency dynamic pressure measurement method includes: the main container pressure measurement component 100 is connected and fixed through the side wall of the main container 300, and the peripheral side of the main container pressure measurement component 100 is sealed and connected to the wall surface of the main container 300. The steam generator pressure measurement component 200 is connected and fixed through the top flange 600, and the peripheral side of the steam generator pressure measurement component 200 is sealed and connected to the top flange 600, and the bottom position of the high-frequency dynamic pressure sensor 4-2 of the steam generator pressure measurement component 200 is close to or flush with the position of the pre-break 800 of the heat transfer tube 700. The cooling component 3-1 of the main container pressure measurement component 100 and the cooling component 3-2 of the steam generator pressure measurement component 200 are respectively passed through the coolant. The coolant can be water.

[0084] Finally, the pre-break 800 is blasted, and the high-frequency dynamic pressure sensor 4-1 of the main container pressure measurement assembly 100 and the high-frequency dynamic pressure sensor 4-2 of the steam generator pressure measurement assembly 200 respectively measure the high-frequency dynamic pressure at the location. It can be understood that the high-frequency dynamic pressure sensor 4-1 and the high-frequency dynamic pressure sensor 4-2 can be used normally before the pre-break 800 is blasted, and the pressure at the location can be measured at any time or continuously.

[0085] The high-frequency dynamic pressure measurement method simulates a liquid heavy metal SGTR accident in a reactor through a main container 300, a main container flange 400, a steam generator 500, a top flange 600 and a heat transfer tube 700 provided with a pre-break 800. When a liquid heavy metal SGTR accident occurs, that is, when the pre-break 800 ruptures, the high-frequency dynamic pressure at the location can be measured by the main container pressure measurement component 100 and the steam generator pressure measurement component 200 respectively. Through the high-frequency dynamic pressures at the two locations, the pressure response characteristics of a single circuit are obtained and the pressure peak is captured to support the safety analysis of the fourth-generation liquid heavy metal reactor.

[0086] By implementing the present invention, the following beneficial effects are achieved:

[0087] The high-frequency dynamic pressure measuring device of the present invention measures high-frequency dynamic pressure through a high-frequency dynamic pressure sensor. The cooling component is arranged around the outer periphery of the high-frequency dynamic pressure sensor. The high-frequency dynamic pressure sensor can be locally cooled by the cooling component, and the temperature of the liquid heavy metal near the measuring point can be reduced, thereby ensuring the measurement of high-frequency dynamic pressure in a high-temperature liquid heavy metal environment.

[0088] The high-frequency dynamic pressure measurement method of the present invention can locally cool the high-frequency dynamic pressure sensor through the cooling components of the main container pressure measurement component and the steam generator pressure measurement component, and reduce the temperature of the liquid heavy metal near the measurement point, thereby ensuring the normal measurement of the high-frequency dynamic pressure in the high-temperature liquid heavy metal environment. The high-frequency dynamic pressure at the breach position is measured by the high-frequency dynamic pressure sensor of the main container pressure measurement component, and the high-frequency dynamic pressure in the main container is measured by the high-frequency dynamic pressure sensor of the steam generator pressure measurement component, which can be used for safety analysis of the high-temperature liquid heavy metal environment.

[0089] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A high-frequency dynamic pressure measuring device, used for measuring pressure in a high-temperature liquid heavy metal environment, characterized in that: It comprises a main container pressure measuring assembly (100) arranged on the side wall of the main container (300) and / or a steam generator pressure measuring assembly (200) arranged on the steam generator (500); At least one of the main container pressure measurement component (100) and the steam generator pressure measurement component (200) comprises an external flange (1-1, 1-2) arranged on the side wall of the main container (300) and / or the outside of the steam generator (500), a connecting flange (2-1, 2-2) penetrating the side wall of the main container (300) and / or the steam generator (500), a cooling component (3-1, 3-2) and a high-frequency dynamic pressure sensor (4-1, 4-2), wherein the connecting flange (2-1, 2-2) is sleeved with the external flange (1-1, 1-2) and abuts against the outer end of the external flange (1-1, 1-2); the high-frequency dynamic pressure sensor (4-1, 4-2) penetrates the connecting flange (2-1, 2-2), and the cooling component (3-1, 3-2) is arranged around the outer periphery of the high-frequency dynamic pressure sensor (4-1, 4-2).

2. The high-frequency dynamic pressure measuring device according to claim 1, characterized in that: The cooling assembly (3-1, 3-2) comprises an inlet pipe (31-1, 31-2), a cooling ring (32-1, 32-2), a top cover (33-1, 33-2) and an outlet pipe (34-1, 34-2); the inlet pipe (31-1, 31-2), the cooling ring (32-1, 32-2) and the outlet pipe (34-1, 34-2) are connected in sequence; the outer side surface of the cooling ring (32-1, 32-2) is fixedly connected to the inner wall surface of the connecting flange (2-1, 2-2); the top cover (33-1, The top cover (33-1, 33-2) is connected to the inner side surface of the cooling ring (32-1, 32-2) and forms a chamber (35-1, 35-2) with the cooling ring (32-1, 32-2) for accommodating the probe (41-1, 41-2) of the high-frequency dynamic pressure sensor (4-1, 4-2); the top cover (33-1, 33-2) is provided with a center hole (36-1, 36-2) connected to the chamber (35-1, 35-2), and the center hole (36-1, 36-2) is opposite to the probe (41-1, 41-2).

3. The high-frequency dynamic pressure measuring device according to claim 2, characterized in that: The connecting flange (2-1, 2-2) comprises a flange plate (21-1, 21-2), a barrel section (22-1, 22-2) and a mounting section (23-1, 23-2); the two ends of the barrel section (22-1, 22-2) are respectively connected to the flange plate (21-1, 21-2) and the mounting section (23-1, 23-2); the flange plate (21-1, 21-2) presses against the external flange (1-1, 1-2) to achieve position limiting; the barrel section (2 The outer flange (1-1, 1-2) is partially sleeved on the outer flange (2-1, 22-2), and the barrel section (22-1, 22-2) is partially inserted into the side wall of the main container (300) and / or the top flange (600) of the steam generator (500); the mounting section (23-1, 23-2) is inserted into the side wall of the main container (300), and / or the mounting section (23-1, 23-2) is arranged inside the steam generator (500).

4. The high-frequency dynamic pressure measuring device according to claim 3, characterized in that: In the steam generator pressure measurement assembly (200), the connecting flange (2-1, 2-2) further comprises an extension cylinder (24) extending axially along the cylinder sections (22-1, 22-2), and two ends of the extension cylinder (24) are respectively fixedly connected to the cylinder sections (22-1, 22-2) and the mounting sections (23-1, 23-2).

5. The high-frequency dynamic pressure measuring device according to claim 4, characterized in that: The connecting flange (2-1, 2-2) also includes a heat-insulating sleeve (25) extending axially along the barrel section (22-1, 22-2), and the heat-insulating sleeve (25) is sleeved on the outer periphery of the barrel section (22-1, 22-2), the extension barrel (24) and / or the installation section (23-1, 23-2).

6. The high-frequency dynamic pressure measuring device according to claim 5, characterized in that: The heat-insulating sleeve (25) is provided with an internal space, and the internal space is evacuated or filled with heat-insulating material.

7. The high-frequency dynamic pressure measuring device according to claim 3, characterized in that: The mounting sections (23-1, 23-2) are provided with first mounting holes (231-1, 231-2) for accommodating the inlet pipes (31-1, 31-2), second mounting holes (232-1, 232-2) for accommodating the outlet pipes (34-1, 34-2) and third mounting holes (233-1, 233-2) for accommodating the high-frequency dynamic pressure sensors (4-1, 4-2); the first mounting holes (231-1, 231-2), the second mounting holes (232-1, 232-2) and the third mounting holes (233-1, 233-2) penetrate axially along the mounting sections (23-1, 23-2); the second mounting holes (232-1, 232-2) are provided between the first mounting holes (231-1, 231-2) and the third mounting holes (233-1, 233-2).

8. The high-frequency dynamic pressure measuring device according to claim 7, characterized in that: The high-frequency dynamic pressure sensor (4-1, 4-2) comprises a probe (41-1, 41-2), a connecting section (42-1, 42-2) and a cable (43-1, 43-2); two ends of the connecting section (42-1, 42-2) are respectively connected to the probe (41-1, 41-2) and the cable (43-1, 43-2); the connecting section (42-1, 42-2) is plugged and fixed to the third mounting hole (233-1, 233-2); the probe (41-1, 41-2) extends out of the third mounting hole (233-1, 233-2) and is partially or completely placed inside the chamber (35-1, 35-2); the cable (43-1, 43-2) extends along the axial direction of the barrel section (22-1, 22-2) and is externally connected to a power source.

9. The high-frequency dynamic pressure measuring device according to any one of claims 2 to 8, characterized in that: The cross section of the cooling ring (32-1, 32-2) is a quadrilateral, and the contact surface between the cooling ring (32-1, 32-2) and the connecting flange (2-1, 2-2) is a plane.

10. The high-frequency dynamic pressure measuring device according to any one of claims 3 to 8, characterized in that: The length of the outlet pipe (34-1, 34-2) is greater than the axial length of the mounting section (23-1, 23-2) and less than the axial length of the connecting flange (2-1, 2-2).

11. A high-frequency dynamic pressure measurement method, characterized in that: Use the high-frequency dynamic pressure measuring device according to any one of claims 1 to 10; The high-frequency dynamic pressure measurement method comprises: a main container pressure measurement component (100) is connected and fixed through the side wall of the main container (300), and the peripheral side of the main container pressure measurement component (100) is sealed and connected to the wall surface of the main container (300); The steam generator pressure measurement assembly (200) passes through the top flange (600) and is connected and fixed, and the peripheral side of the steam generator pressure measurement assembly (200) is sealed and connected to the top flange (600), and the bottom position of the high-frequency dynamic pressure sensor (4-2) of the steam generator pressure measurement assembly (200) is close to or flush with the position of the pre-break (800) of the heat transfer pipe (700); Passing coolant through the cooling component (3-1) of the main container pressure measurement component (100) and the cooling component (3-2) of the steam generator pressure measurement component (200), respectively; Finally, the pre-break (800) is blasted, and the high-frequency dynamic pressure sensor (4-1) of the main container pressure measurement assembly (100) and the high-frequency dynamic pressure sensor (4-2) of the steam generator pressure measurement assembly (200) respectively measure the high-frequency dynamic pressure at their respective locations.

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