Material SCC crack propagation measuring device for high-temperature water environment

Abstract

The embodiment of the invention discloses a material SCC crack propagation measuring device for a high-temperature water environment, the material SCC crack propagation measuring device comprises an outer sleeve shell, a pressure detection assembly and a force load adjusting assembly, the outer sleeve shell comprises a shell and a loop connecting flange, and the force load adjusting assembly comprises a first force applying assembly and a second force applying assembly. A sample can be arranged in the outer sleeve shell, one end of the sample is connected to the pressure detecting assembly, the other end of the sample is connected to the first force applying assembly and the second force applying assembly, then the sample is connected to external equipment through the loop connecting flange, and high-temperature and high-pressure water is supplied into the outer sleeve shell through the external equipment; meanwhile, stress can be applied to the sample through the first force application assembly and the second force application assembly, then the high temperature and stress state of the sample can be simulated externally, the force load of the sample can be collected in real time through the pressure detection assembly, the state simulation of the sample is more reliable, and then the SCC crack propagation measurement of the material is facilitated.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of reactor and research reactor material irradiation test, in particular to a material SCC crack propagation measuring device for high-temperature water environment. BACKGROUND

[0002] The nuclear device structure is complex, involves multiple materials, and the corrosion cracking (Stress Corrosion Cracking, SCC) performance change of the material under the high-temperature, water chemistry and other working conditions of the nuclear power plant is a key problem affecting the safety and service life of the nuclear device. The crack generated can expand without any premonition, causing the metal component to suddenly break down and fail, resulting in a serious accident.

[0003] At present, for the measurement of the crack propagation behavior of the material in the reactor, the original detection method is to rely on the post-irradiation off-line inspection, but the off-line test is difficult to obtain the synergistic effect of the material SCC high-energy ray (such as neutron) irradiation environment influencing factors in the reactor, and the evolution law of the close correlation process between the material SCC and time, stress load and irradiation environment, which is not conducive to revealing the performance evolution mechanism of the material.

[0004] The key factors involved in the material SCC crack propagation characteristics are the provision of the force load and the measurement of the crack depth change. Due to the limitation of the reactor test hole size and the research reactor irradiation test loop, and the harsh environment in the reactor, it is very difficult to study the creep characteristics of the material in the reactor. Before the in-reactor test application of the material SCC crack propagation measuring device, the off-line simulation of the in-reactor high-temperature, high-pressure water working condition measuring device and method verification test must be carried out for the material SCC crack propagation measuring device. To evaluate the feasibility and rationality of the designed material SCC crack propagation measuring device. As a support for the functional verification influence analysis of the post-reactor radioactive environment. Therefore, before carrying out the in-reactor research, a set of off-line test simulation device for measuring the material SCC crack propagation on-line is needed to carry out the off-line high-temperature, high-pressure water test. SUMMARY

[0005] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. This part of the present application does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor to try to determine the protection scope of the claimed technical solution.

[0006] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, the embodiment of the present application proposes a material SCC crack propagation measuring device for high-temperature water environment, which comprises:

[0008] a casing and a circuit connecting flange connected to the casing, the circuit connecting flange being communicated to the casing;

[0009] a pressure detecting assembly connected to one end of the casing;

[0010] a force load adjusting assembly, at least part of which is arranged in the casing at one end of the casing away from the pressure detecting assembly, the force load adjusting assembly comprising a first force applying assembly and a second force applying assembly, a test sample being arranged in the casing, one end of the test sample being connected to the pressure detecting assembly and the other end being connected to the first force applying assembly and the second force applying assembly, the first force applying assembly and the second force applying assembly being capable of independently applying stress to the test sample.

[0011] In one possible implementation, the force load adjusting assembly comprises:

[0012] the first force applying assembly comprises a force compensation sleeve, a force compensation bellows, an end face cover and a sealing end cover, one end of the force compensation sleeve being connected to the sealing end cover, the end face cover being movably connected to one end of the force compensation bellows, the force compensation sleeve, the force compensation bellows, the end face cover and the sealing end cover forming a first sealed space;

[0013] the first force applying assembly comprises a force applying bellows, a center rod guide end cover, a guide rod end cover and a center guide rod, the force applying bellows being arranged in the force compensation sleeve and connected to the sealing end cover, the outer ring of the center rod guide end cover being connected to the force compensation sleeve, the guide rod end cover being arranged at the end of the force applying bellows, one end of the center guide rod being connected to the guide rod end cover and the other end passing through the center rod guide end cover and the force compensation bellows and being connected to the end face cover, the sealing end cover, the force applying bellows and the guide rod end cover forming a second sealed space.

[0014] In one possible implementation, the force load adjusting assembly comprises:

[0015] at least two gas inlet and outlet pipes, the two gas inlet and outlet pipes being respectively communicated to the first sealed space and the second sealed space.

[0016] In one possible implementation, the SCC crack propagation measuring device for high temperature water environment further comprises:

[0017] a support ring arranged in the casing for supporting the force load adjusting assembly;

[0018] At least two connecting shafts and at least two force rods, the connecting shafts and the force rods are divided into two groups, one end of the sample is connected to the force load adjusting assembly through one group of connecting shafts and force rods, and the other end is connected to the pressure detecting assembly through another group of connecting shafts and force rods;

[0019] In an available embodiment, a fixing washer is arranged at the connection between the sample and the force rod;

[0020] A screw nut is arranged to pass through the fixing washer and the force rod, and then screwed on the sample.

[0021] In an available embodiment, the pressure detecting assembly comprises:

[0022] An electrode end cover is sealingly connected to one end of the outer shell away from the force load adjusting assembly;

[0023] A pressure sensor fixing block is connected to the electrode end cover;

[0024] A pressure sensor adapter block is arranged to be connected to the sample;

[0025] A pressure sensor is connected to the pressure sensor fixing block and the pressure sensor adapter block.

[0026] In an available embodiment, the outer shell further comprises:

[0027] Measuring combination connecting flanges are arranged at both ends of the shell, and the measuring combination connecting flanges are arranged to sealingly connect with the force load adjusting assembly and the pressure detecting assembly.

[0028] In an available embodiment, the SCC crack propagation measuring device for high-temperature water environment further comprises:

[0029] An armored signal cable comprises an insulation layer, an armored outer shell, a current core wire, an inner device cable adapter, an outer device adapter, and at least two shielding soft wires, the insulation layer is sleeved on the current core wire, the armored outer shell is arranged on the insulation layer, the inner device cable adapter is arranged at one end of the armored signal cable and sealingly connected to the armored outer shell, the outer device adapter is connected to the sample through one shielding soft wire, the outer device adapter is arranged at the other end of the armored signal cable and sealingly connected to the armored outer shell, and the outer device adapter is arranged to pass out of the SCC crack propagation measuring device for high-temperature water environment through another shielding soft wire.

[0030] In one feasible implementation, the force load adjustment assembly further includes:

[0031] The cable enters and exits through the sealed tube, and the shielded flexible cable connected to the external adapter is transmitted through the sealed tube.

[0032] In one feasible implementation, the material SCC crack propagation measurement device for high-temperature water environments further includes:

[0033] A sealing head assembly, wherein the sealing head assembly is connected to the cable inlet / outlet sealing pipe and the gas inlet / outlet pipe of the force load adjustment assembly;

[0034] The sealing head assembly includes: a sealing head connector, a sealing head gasket, a sealing head sealing pad, a sealing head gland, a clamping nut, a stainless steel connecting pipe, and a compression fitting.

[0035] One end of the ferrule connector is connected to the stainless steel connector, and is used to connect to the cable inlet / outlet sealing pipe or the gas inlet / outlet pipe;

[0036] The sealing head connector is located at the other end of the stainless steel pipe, the sealing head gasket and the sealing head gasket are located inside the sealing head connector, the sealing head cover is pressed onto the sealing head gasket, and the clamping nut is connected to the sealing head connector.

[0037] Compared with the prior art, the present invention has at least the following beneficial effects:

[0038] The SCC crack propagation measurement device for materials in a high-temperature water environment provided in this application includes an outer shell, a pressure detection component, and a force load adjustment component. The outer shell includes a housing and a loop connection flange. The force load adjustment component includes a first force application component and a second force application component. Based on this, during use, the sample can be placed inside the outer shell, with one end of the sample connected to the pressure detection component and the other end connected to the first and second force application components. Then, it is connected to an external device through the loop connection flange. The external device supplies high-temperature and high-pressure water into the outer shell, while the first and second force application components apply stress to the sample. This allows for the simulation of the sample's high temperature and stress state externally. The pressure detection component can collect the force load of the sample in real time, making the simulation of the sample's state more reliable and facilitating the measurement of SCC crack propagation in materials.

[0039] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 A schematic structural diagram of a material SCC crack propagation measuring device for a high-temperature water environment, provided in this application;

[0042] Figure 2 A schematic structural diagram from another angle of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application;

[0043] Figure 3 A schematic structural diagram of the outer shell of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application;

[0044] Figure 4 A schematic structural diagram of the force load adjustment component of a material SCC crack propagation measurement device for a high-temperature water environment according to an embodiment of this application;

[0045] Figure 5 A schematic structural diagram of the force load adjustment assembly of a material SCC crack propagation measurement device for a high-temperature water environment according to an embodiment of this application, from another angle;

[0046] Figure 6 A schematic structural diagram of the sealing head assembly of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application;

[0047] Figure 7 A schematic structural diagram of the sealing head assembly of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application, from another angle;

[0048] Figure 8 A schematic structural diagram of an armored signal cable for a material SCC crack propagation measuring device in a high-temperature water environment, provided in this application;

[0049] Figure 9 A schematic structural diagram of the external adapter of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application;

[0050] Figure 10A schematic structural diagram of the internal cable adapter of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application;

[0051] Figure 11 A schematic structural diagram from another angle of a material SCC crack propagation measuring device for a high-temperature water environment according to an embodiment of this application;

[0052] Figure 12 for Figure 11 A magnified view of a portion of point A in the middle.

[0053] in, Figures 1 to 12 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0054] 1 Outer shell, 2 Fixing washer, 3 Connecting shaft, 4 Force rod, 5 Sample, 6 Pressure sensor fixing block, 7 Force load adjustment assembly, 8 Support ring, 9 Tightening nut, 10 Electrical end cap, 11 Pressure sensor, 12 Pressure sensor adapter block, 13 Spiral wound gasket, 15 Sealing head assembly, 16 Armored signal cable;

[0055] 101 Housing, 102 Circuit connection flange, 103 Measurement assembly connection flange;

[0056] 701 End face cover, 702 Force compensation bellows, 703 Center rod guide end cover, 704 Center guide rod, 705 Guide rod end cover, 706 Sealing end cover, 707 Force compensation sleeve, 708 Gas inlet / outlet pipe, 709 Cable inlet / outlet sealing pipe, 710 Force application bellows;

[0057] 151 Sealing head connector, 152 Sealing head gasket, 153 Sealing head gasket, 154 Sealing head gland, 155 Compression nut, 156 Stainless steel connecting pipe, 157 Compression fitting.

[0058] 161 Insulation layer, 162 Armored shell, 163 Current core wire, 164 Internal cable adapter, 165 External adapter, 166 Shielded flexible connector;

[0059] 1651 Outer adapter protective sleeve, 1652 Filler layer, 1641 Inner adapter protective sleeve, 1642 Sealing layer. Detailed Implementation

[0060] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0062] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0063] Considering that nuclear structural materials are highly susceptible to stress corrosion cracking (SCC) under the combined effects of high temperature, high pressure, complex stress loads, corrosion, and neutron radiation, which greatly threatens the safety, economy, and service life of nuclear power plants, this paper addresses the current lack of measurement methods for key parameters of SCC crack propagation in in-reactor environments and the insufficient supporting technologies.

[0064] like Figures 1 to 12 As shown, based on this, this application proposes a material SCC crack propagation measurement device for high-temperature water environment, comprising: an outer shell, the outer shell including a housing 101 and a loop connection flange 102 connected to the housing 101, the loop connection flange 102 being conductive to the housing 101; a pressure detection component, the pressure detection component being connected to one end of the outer shell; a force load adjustment component 7, at least a portion of the force load adjustment component 7 being disposed within the housing 101, located at the end of the outer shell opposite to the pressure detection component, the force load adjustment component 7 including a first force application component and a second force application component, a sample being disposed within the outer shell, one end of the sample being connected to the pressure detection component, and the other end being connected to the first force application component and the second force application component, both the first force application component and the second force application component being capable of independently applying stress to the sample.

[0065] The SCC crack propagation measurement device for materials in a high-temperature water environment provided in this application embodiment includes an outer shell, a pressure detection component, and a force load adjustment component 7. The outer shell includes a housing 101 and a loop connection flange 102. The force load adjustment component 7 includes a first force application component and a second force application component. Based on this, during use, the sample can be placed inside the outer shell, with one end of the sample connected to the pressure detection component and the other end connected to the first and second force application components. Then, it is connected to an external device through the loop connection flange 102. The external device supplies high-temperature and high-pressure water to the outer shell. At the same time, the first and second force application components can apply stress to the sample, thereby simulating the high temperature and stress state of the sample externally. The pressure detection component can collect the force load of the sample 5 in real time, making the simulation of the sample state more reliable and facilitating the measurement of SCC crack propagation in materials.

[0066] The material SCC crack propagation measurement device for high-temperature water environment provided in this application embodiment includes a force load adjustment component 7 comprising a first force application component and a second force application component. Both the first force application component and the second force application component can independently apply stress to the sample. This configuration allows the sample to elongate or contract through both the first force application component and the second force application component. The force load can be superimposed and adjusted, expanding the range of force load generation on the sample 5. The overall pressure range can be doubled, greatly increasing the accuracy of material SCC crack propagation measurement.

[0067] The SCC crack propagation measurement device for materials in high-temperature water environments provided in this application embodiment can be used to simulate the high-temperature, high-pressure, and water environment conditions of an off-core reactor, and to conduct key technology verification such as controllable stress loading and DCPD method for material crack propagation. It can obtain the measurement technology functions and performance data of material SCC crack propagation under conditions such as high-temperature water scouring, and lay the foundation for in-core measurement technology. It has good practicality, advanced technology and broad market prospects.

[0068] like Figures 1 to 3 As shown in the following example, in order to ensure the efficient supply of high-temperature water, there can be two loop connection flanges 102, and in order to ensure the sealing effect, a spiral wound gasket 13 can be provided at each loop connection flange 102.

[0069] like Figures 4 to 5As shown, in one feasible embodiment, the force load adjusting assembly 7 includes: a first force applying assembly including: a force compensation sleeve 707, a force compensation bellows 702, an end face cover 701, and a sealing end cover 706. One end of the force compensation sleeve 707 is connected to the sealing end cover 706, and the end face cover 701 is movably connected to one end of the force compensation bellows 702. The force compensation sleeve 707, the force compensation bellows 702, the end face cover 701, and the sealing end cover 706 form a first sealing space; the first force applying assembly includes: a force applying bellows 710, a center rod guide end cover 703, and a guide... The force-applying bellows 710 is disposed inside the force-compensating sleeve 707 and connected to the sealing end cap 706, with the outer ring of the center rod guide end cap 703 connected to the force-compensating sleeve 707. The guide rod end cap 705 is disposed at the end of the force-applying bellows 710. One end of the center guide rod 704 is connected to the guide rod end cap 705, and the other end passes through the center rod guide end cap 703 and the force-compensating bellows 702 and is connected to the end face cap 701. The sealing end cap 706, the force-applying bellows 710 and the guide rod end cap 705 form a second sealing space.

[0070] In this technical solution, the structural composition of the force load adjustment component 7 is further provided. The force load adjustment component 7 includes: an end face cover 701, a force compensation bellows 702, a center rod guide end cover 703, a center guide rod 704, a guide rod end cover 705, a sealing end cover 706, a force compensation sleeve 707, a gas inlet / outlet pipe 708, a cable inlet / outlet sealing pipe 709, and a force application bellows 710. Among them, one end of the force-compensating bellows 702 is welded and sealed to one end of the movable end cap 701 and one end of the central guide rod 704, and the other end is welded to the central rod guide end cap 703; the outer ring of the central rod guide end cap 703 is welded to one end of the force-compensating sleeve 707, and the inner ring passes through the central guide rod 704; the other end of the force-compensating sleeve 707 is welded to the sealing end cap 706; the sealing end cap 706 is also welded and sealed to one end of the force-applying bellows 710; the other end of the force-applying bellows 710 is welded and sealed to the movable guide rod end cap 705 and then connected to the central guide rod 704; the sealing end cap 706 has multiple through holes, which are welded and connected to multiple gas inlet / outlet pipes 708 and cable inlet / outlet sealing pipes 709 respectively.

[0071] One of the gas inlet / outlet pipes 708, the sealing end cap 706, the force-applying bellows 710, and the guide rod end cap 705 form a second sealed space as a second force-applying component. The gas inlet / outlet pipe 708 is connected to a high-pressure gas regulating system. Gas is filled into or released into the second sealed space through the high-pressure gas regulating system, causing the force-applying bellows 710 to expand or contract, generating an adjustable force load, which is transmitted to the force-bearing rod 4 through the central guide rod 704. Another gas inlet / outlet pipe 708, together with the end cap 701, force-compensating bellows 702, center rod guide end cap 703, sealing end cap 706, and force-compensating sleeve 707, forms a first sealed space as a first force application component. This other gas inlet / outlet pipe 708 is also connected to another path of the high-pressure gas regulating system. Gas is introduced or released into the first sealed space through the high-pressure gas regulating system, causing the force-compensating bellows 702 to expand or contract, further generating an adjustable force load. This load is directly transmitted to the force-bearing rod 4 through the end cap 701, acting on the sample 5. The cable inlet / outlet sealing pipe 709 is used for the passage and sealing of multiple armored signal measurement cables for the material crack propagation potential drop measurement mechanism.

[0072] Based on this, by nesting and coupling the force-compensating bellows 702 and the force-applying bellows 710, a second sealed space is formed inside the force-applying bellows 710 and the guide rod end cap 705, and a first sealed space is formed inside the force-compensating bellows 702, the central rod guide end cap 703, the sealing end cap 706, and the force-compensating sleeve 707. These two independent spaces allow for individual control of the gas pressure in each space via a high-pressure gas regulating system. This causes both the force-applying bellows 710 and the force-compensating bellows 702 to expand or contract, generating an adjustable, superimposed force load that extends the range of force loads applied to sample 5. Simultaneously, because the pressure bearing capacity of the bellows is limited due to the pressure difference between the inside and outside of the bellows, controlling the two independent spaces ensures that the pressure of a single bellows always meets the pressure bearing range, effectively doubling the overall pressure range.

[0073] like Figures 4 to 5 As shown, in one feasible embodiment, the force load adjusting assembly 7 includes at least two gas inlet / outlet pipes 708, which are respectively connected to the first sealed space and the second sealed space. This arrangement facilitates the output or extraction of gas into the first sealed space and the second sealed space, and facilitates the control of the first force applying assembly and the second force applying assembly.

[0074] like Figure 2 As shown, in one feasible embodiment, the material SCC crack propagation measuring device for high-temperature water environment further includes: a support ring 8, which is disposed inside the outer shell and is used to support the force load adjustment component 7.

[0075] In this technical solution, a structural composition of a material SCC crack propagation measuring device for high-temperature water environment is further provided. The material SCC crack propagation measuring device for high-temperature water environment may also include a support ring 8, and a force load adjustment component 7 may be inserted through the support ring 8. The support ring 8 can support and guide the force load adjustment component 7, thereby making the movement of the force load adjustment component 7 more accurate and the fixation more stable.

[0076] like Figure 2 As shown, in one feasible embodiment, the material SCC crack propagation measuring device for high-temperature water environment further includes: at least two connecting shafts 3 and at least two force rods 4. The multiple connecting shafts 3 and force rods 4 are divided into two groups. One end of the sample is connected to the force load adjustment component 7 through one group of connecting shafts 3 and force rods, and the other end is connected to the pressure detection component through another group of connecting shafts 3 and force rods.

[0077] In this technical solution, a sample fixing method is further provided. The material SCC crack propagation measuring device in a high-temperature water environment can also include at least two connecting shafts 3 and at least two force rods 4. One end of the sample is connected to the force load adjustment component 7 through a set of connecting shafts 3 and force rods, and the other end is connected to the pressure detection component through another set of connecting shafts 3 and force rods. Based on this, the sample fixing is more standardized, and the stress applied to the sample is more accurate, which can better measure the material SCC crack propagation.

[0078] like Figure 2 As shown, in one feasible embodiment, a fixing washer 2 is disposed at the connection between the sample and the force-bearing rod 4; a tightening nut 9 is used to pass through the fixing washer 2 and the force-bearing rod 4, and then screwed onto the sample. This arrangement makes the sample fixation more reliable.

[0079] like Figure 2 , Figure 11 and Figure 12 As shown, in one feasible embodiment, the pressure detection assembly includes: an electrode end cap 10, which is sealed to one end of the outer shell away from the force load adjustment assembly 7; a pressure sensor fixing block 6, which is connected to the electrode end cap 10; a pressure sensor adapter block 12, which is used to connect to the sample; and a pressure sensor 11, which is connected to the pressure sensor fixing block 6 and the pressure sensor adapter block 12.

[0080] In this technical solution, the structural composition of the pressure detection component is further provided. The pressure detection component may include an electrode end cap 10, a pressure sensor fixing block 6, a pressure sensor adapter block 12, and a pressure sensor 11. The electrode end cap 10 can encapsulate the outer shell. The pressure sensor fixing block 6 and the pressure sensor adapter block 12 facilitate the fixing of the pressure sensor 11 and establish the connection between the pressure sensor 11 and the sample. The pressure sensor 11 can collect the force load acting on the sample 5 in real time.

[0081] like Figure 3 As shown, in one feasible embodiment, the outer casing further includes: a measuring combination connection flange 103, which is disposed at both ends of the housing 101 and is used for sealing connection with the force load adjustment assembly 7 and the pressure detection assembly.

[0082] In this technical solution, the structure of the outer shell is further provided. The outer shell may include a measuring combination connection flange 103. The measuring combination connection flange 103 facilitates the sealing connection between the outer shell and the pressure detection component and the force load adjustment component 7, thus ensuring airtightness.

[0083] In some examples, the outer casing may include a housing 101, a loop connection flange 102, and a measurement combination connection flange 103. The loop connection flange 102 and the measurement combination connection flange 103 are welded to the housing 101. The loop connection flange 102 is used to connect to the high-temperature water loop test system via bolts, providing water inlet and outlet. The measurement combination connection flange 103 is used to fix to the force load adjustment assembly 7 and the electrode end cap 10 via bolts.

[0084] like Figures 8 to 10 As shown, in one feasible embodiment, the material SCC crack propagation measuring device for high-temperature water environment further includes: an armored signal cable 16, which includes: an insulation layer 161, an armored shell 162, a current core wire 163, an internal cable adapter 164, an external adapter 165, and at least two shielded flexible connectors 166. The insulation layer 161 is sleeved on the current core wire 163, and the armored shell 162 is sleeved on the insulation layer 161. The internal cable adapter 164 is located at one end of the armored signal cable 16 and is sealed to the armored shell 162. The external adapter 165 is connected to the sample through one shielded flexible connector 166, and the other end of the armored signal cable 165 is sealed to the armored shell 162. The external adapter 165 extends out of the material SCC crack propagation measuring device for high-temperature water environment through another shielded flexible connector 166.

[0085] In this technical solution, considering the SCC crack propagation measurement method, the Direct Current Potential Drop (DCPD) method, which involves applying current to the metal sample 5 and observing the change in potential to achieve real-time monitoring of crack dynamic growth, is a relatively ideal measurement method in complex environments such as high temperature, high pressure, and strong radiation within a reactor. Therefore, the SCC crack propagation measurement device for materials in high-temperature water environments can also include an armored signal cable 16. The armored signal cable 16 can be used to acquire crack change signals from the sample. A schematic diagram of the armored signal cable 16 is shown below. Figure 5 As shown, the cable, serving as the carrier for current transmission between the DC voltage acquisition system and the cracked sample 5, is a multi-layered, densely armored, high-temperature resistant, waterproof, and insulated cable. It includes an insulation layer 161, an armored outer shell 162, a current core wire 163, an internal cable adapter 164, an external adapter 165, and a shielded flexible connector 166. The insulation layer 161 is an inorganic mineral insulating material with good insulation properties, typically MgO or Al2O3. The armored outer shell 162 is a corrosion-resistant, high-temperature resistant Inconel nickel armored outer shell, typically Inconel 600 or stainless steel. The current core wire 163 is a high-temperature resistant, radiation-resistant nickel-based core wire, typically Inconel 601. The armored cable achieves dense armor through pull-out diameter reduction.

[0086] External adapter 165 of the device, structural diagram as shown below Figure 9 As shown, it includes an outer adapter protective sleeve 1651, a filling layer 1652, and a shielded flexible wire 166. After the shielded flexible wire 166 is welded to the current core wire 163, it is protected by the outer adapter protective sleeve 1651. One end of the outer adapter protective sleeve 1651 is welded and sealed to the armor shell 162. The shielded flexible wire 166 and the current core wire 163 are protected and welded through the sleeve, and epoxy resin is filled to seal and fix the sleeve, ensuring the sealing and protection of the welded parts.

[0087] Cable adapter 164 inside the device, structural diagram as shown below Figure 10 As shown, it comprises an inner adapter protective sleeve 1641 and a sealing layer 1642. Its characteristic is that the exposed current core wire 163 extending from the armored signal cable 16 is protected by the inner adapter protective sleeve 1641, with one end welded and sealed to the armored outer shell 162, and the other end sealed and fixed by high-temperature glass sintering, thus achieving the cable's high-temperature resistance and waterproof insulation functions.

[0088] During the testing process, the components used to measure the crack propagation of the material include: crack current wiring, sample 5, force rod 4, and connecting shaft 3. Both ends of sample 5 are fixed to force rod 4 via connecting shaft 3. The open side of sample 5 is connected via four crack current wiring connections, which are respectively connected to armored signal cables 16. Armored signal cables 16 extend from the sealing head assembly 15 through the outer shell 1, and further measure the output voltage of sample 5 via a potential measuring device. By collecting voltage changes, the crack changes in sample 5 under force load are measured, thus achieving online measurement of crack propagation.

[0089] like Figure 4 and Figure 5 As shown, in one feasible embodiment, the force load adjustment assembly 7 further includes a cable inlet / outlet sealing tube 709, through which the shielded flexible cable 166 connected to the external adapter is routed out. This arrangement facilitates the sealed outgoing of the armored signal cable 16 via a material SCC crack propagation measuring device for high-temperature water environments.

[0090] like Figure 6 and Figure 7 As shown, in one feasible embodiment, the material SCC crack propagation measuring device for high-temperature water environment further includes: a sealing head assembly 15, which is connected to the cable inlet / outlet sealing pipe 709 and the gas inlet / outlet pipe 708 of the force load adjustment assembly 7; wherein, the sealing head assembly 15 includes: a sealing head connector 151, a sealing head washer 152, a sealing head gasket 153, a sealing head gland 154, a clamping nut 155, a stainless steel connecting pipe 156, and a ferrule fitting 157; wherein, one end of the ferrule fitting 157 is connected to the stainless steel connecting pipe 156 for connection to the cable inlet / outlet sealing pipe 709 or the gas inlet / outlet pipe 708; wherein, the sealing head connector 151 is disposed at the other end of the stainless steel connecting pipe 156, the sealing head washer 152 and the sealing head gasket 153 are disposed inside the sealing head connector 151, the sealing head gland 154 is pressed onto the sealing head gasket 153, and the clamping nut 155 is connected to the sealing head connector 151.

[0091] In this technical solution, the material SCC crack propagation measuring device for high-temperature water environment may also include a sealing head assembly 15. By setting the sealing head assembly 15, the circuit and air circuit can be sealed. Specifically, the sealing head assembly 15 includes: a sealing head connector 151, a sealing head gasket 152, a sealing head gasket 153, a sealing head cover 154, a clamping nut 155, a stainless steel connecting pipe 156, and a ferrule fitting 157. The stainless steel connecting pipe 156 is connected at one end to the ferrule fitting 157 and at the other end to one end of the sealing head connector 151 by welding. The sealing head gasket 152 and the sealing head gasket 153 are arranged in layers inside the sealing head connector 151 with the sealing head gasket 152 at both ends and the sealing head gasket 153 in the middle, and are held in place by the sealing head cover 154. The other end of the sealing head connector 151 has an external thread that can match the internal thread of the clamping nut 155. The sealing head connector 151, the sealing head gasket 152, the sealing head gasket 153, the sealing head cover 154, the clamping nut 155, the stainless steel connecting pipe 156, and the ferrule fitting 157 all have internal through holes. After the armored signal cable 16 passes through, tightening the clamping nut 155 pushes the sealing head cover 154 and the sealing head gasket 152 to squeeze the sealing head gasket 153 and clamp the cable, thus achieving water pressure boundary sealing.

[0092] Considering that the device and method for measuring SCC crack propagation in reactor materials require high temperature and high pressure water resistance, this invention designs an outer shell 1 structure that allows the loop connection flange 102 to be directly connected to the test high temperature water loop test system via bolts. By adjusting the high temperature water loop test system, the high temperature water pressure and temperature of the reactor are simulated, and the measurement device and method are tested and verified.

[0093] Considering the requirements of in-pile SCC crack propagation measurement devices and methods, remote control of the force loading mechanism is needed to generate high stress loading. This invention provides a force load adjustment component 7, in which the stress loading mechanism is coupled and installed inside the outer shell 1 of the crack propagation measurement device. Through the force load adjustment subsystem, high-pressure gas is remotely adjusted externally to act on the force compensation bellows 702 and the force application bellows 710, forming a stress load that acts on the sample 5, thus achieving in-pile stress adjustment. Furthermore, by nesting and coupling the force-compensating bellows 702 and the force-applying bellows 710, a second sealed space is formed inside the force-applying bellows 710 and the guide rod end cap 705, and a first sealed space is formed inside the force-compensating bellows 702, the central rod guide end cap 703, the sealing end cap 706, and the force-compensating sleeve 707. These two independent spaces allow for individual control of the gas pressure in each space via a high-pressure gas regulating system. This causes both the force-applying bellows 710 and the force-compensating bellows 702 to expand or contract, generating an adjustable, superimposed force load that extends the force load range applied to sample 5. Simultaneously, because the pressure bearing capacity due to the pressure difference between the inside and outside of the bellows is limited, controlling the two independent spaces ensures that the pressure of a single bellows always meets the pressure bearing range, thus doubling the overall pressure range.

[0094] The force load applied to specimen 5 can be acquired in real time by pressure sensor 11. By connecting multiple leads to specimen 5, and using cable inlet and outlet pipes and sealing heads to pass through the sealed armored cable, a stable current is provided to monitor the potential change caused by crack propagation in specimen 5 in real time, thereby realizing online measurement of crack depth.

[0095] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0096] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0097] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A material SCC crack propagation measuring device for high-temperature water environments, characterized in that, include: An outer casing, the outer casing including a housing and a circuit connection flange connected to the housing, the circuit connection flange being conductive to the housing; A pressure detection component, wherein the pressure detection component is connected to one end of the outer shell; A force load adjustment assembly, at least a portion of which is disposed within the housing, located at one end of the outer shell opposite to the pressure detection assembly, the force load adjustment assembly includes a first force application assembly and a second force application assembly, a sample is disposed within the outer shell, one end of the sample is connected to the pressure detection assembly, and the other end is connected to the first force application assembly and the second force application assembly, both of which are capable of independently applying stress to the sample.

2. The material SCC crack propagation measuring device for high-temperature water environment according to claim 1, characterized in that, The force load adjustment component includes: The first force application component includes: a force compensation sleeve, a force compensation bellows, an end face cap, and a sealing end cap. One end of the force compensation sleeve is connected to the sealing end cap, and the end face cap is movably connected to one end of the force compensation bellows. The force compensation sleeve, the force compensation bellows, the end face cap, and the sealing end cap form a first sealing space. The second force application assembly includes: a force application bellows, a center rod guide end cap, a guide rod end cap, and a center guide rod. The force application bellows is disposed inside the force compensation sleeve and connected to the sealing end cap. The outer ring of the center rod guide end cap is connected to the force compensation sleeve. The guide rod end cap is disposed at the end of the force application bellows. One end of the center guide rod is connected to the guide rod end cap, and the other end passes through the center rod guide end cap and the force compensation bellows and is connected to the end face cap. The sealing end cap, the force application bellows, and the guide rod end cap form a second sealing space.

3. The material SCC crack propagation measuring device for high-temperature water environment according to claim 2, characterized in that, The force load adjustment component includes: At least two gas inlet and outlet pipes are provided, which are respectively connected to the first sealed space and the second sealed space.

4. The material SCC crack propagation measuring device for high-temperature water environment according to claim 1, characterized in that, Also includes: A support ring is disposed inside the outer shell and is used to support the force load adjustment assembly; At least two connecting shafts and at least two force-bearing rods are provided, and the plurality of connecting shafts and force-bearing rods are divided into two groups. One end of the sample is connected to the force load adjustment assembly through one group of connecting shafts and force-bearing rods, and the other end is connected to the pressure detection assembly through another group of connecting shafts and force-bearing rods.

5. The material SCC crack propagation measuring device for high-temperature water environment according to claim 4, characterized in that, A fixing washer is disposed at the connection between the sample and the force-bearing rod; Tighten the nut, which passes through the fixing washer and the force bar, and then screws it onto the sample.

6. The material SCC crack propagation measuring device for high-temperature water environment according to claim 1, characterized in that, The pressure detection component includes: An electrode cap is sealed to one end of the outer shell that is opposite to the force load adjustment assembly. A pressure sensor mounting block, wherein the pressure sensor mounting block is connected to the electrode end cap; A pressure sensor adapter block, which is used to connect to the sample; A pressure sensor, which is connected to the pressure sensor mounting block and the pressure sensor adapter block.

7. The material SCC crack propagation measuring device for high-temperature water environment according to any one of claims 1 to 6, characterized in that, The outer shell also includes: A measuring assembly connecting flange is disposed at both ends of the housing, and the measuring assembly connecting flange is used for sealing connection with the force load adjustment assembly and the pressure detection assembly.

8. The material SCC crack propagation measuring device for high-temperature water environment according to any one of claims 1 to 6, characterized in that, Also includes: An armored signal cable, comprising: an insulation layer, an armored outer shell, a current core wire, an internal cable adapter, an external adapter, and at least two shielded flexible connectors. The insulation layer is sleeved on the current core wire, and the armored outer shell is disposed on the insulation layer. The internal cable adapter is disposed at one end of the armored signal cable and is sealed to the armored outer shell. The external adapter is connected to the sample via one shielded flexible connector, and the other end of the armored signal cable is also sealed to the armored outer shell. The external adapter extends out of the material SCC crack propagation measuring device for high-temperature water environments via another shielded flexible connector.

9. The material SCC crack propagation measuring device for high-temperature water environment according to claim 8, characterized in that, The force load adjustment component further includes: The cable enters and exits through the sealed tube, and the shielded flexible cable connected to the external adapter is transmitted through the sealed tube.

10. The material SCC crack propagation measuring device for high-temperature water environment according to any one of claims 1 to 6, characterized in that, Also includes: A sealing head assembly, wherein the sealing head assembly is connected to the cable inlet / outlet sealing pipe and the gas inlet / outlet pipe of the force load adjustment assembly; The sealing head assembly includes: a sealing head connector, a sealing head gasket, a sealing head sealing pad, a sealing head gland, a clamping nut, a stainless steel connecting pipe, and a compression fitting. One end of the ferrule connector is connected to the stainless steel connector, and is used to connect to the cable inlet / outlet sealing pipe or the gas inlet / outlet pipe; The sealing head connector is located at the other end of the stainless steel pipe, the sealing head gasket and the sealing head gasket are located inside the sealing head connector, the sealing head cover is pressed onto the sealing head gasket, and the clamping nut is connected to the sealing head connector.

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