Thermoelectric potential measuring device for nuclear power plant pipeline

Abstract

The utility model discloses a thermoelectric force measuring device for a nuclear power plant pipeline. The thermoelectric force measuring device comprises a detector, a probe positioning assembly and an elastic band used for surrounding the pipeline in the circumferential direction. The detector comprises a probe which abuts against the pipeline so as to carry out thermal electromotive force measurement. A positioning cavity is formed in the probe positioning assembly, and the detector is detachably arranged in the positioning cavity; one end of the positioning cavity is through so as to be used for abutting against the pipeline when the probe is used for measuring; the two ends of the elastic band are installed on the probe positioning assembly respectively and located on the two opposite sides of the positioning cavity respectively. And at least one end of the elastic band is detachably connected with the probe positioning assembly. According to the invention, the time for operators to approach the pipeline can be shortened, and the irradiation dose of the operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a nuclear power plant pipeline thermoelectric potential measuring device. Background Art

[0002] The primary circuit piping in a nuclear power plant is one of the plant's three safety barriers. When exposed to high temperatures, piping materials can experience performance degradation due to thermal aging. As one of the most critical components in a nuclear power plant, its thermal aging state must be controlled and, when necessary, performance evaluated to ensure it consistently maintains its performance within its operational limits.

[0003] Current methods for evaluating the performance of main pipelines in nuclear power plants include nondestructive assessment (NDA) based on thermoelectric potential testing. Specifically, operators use handheld probes to inspect the pipelines. This NDA method enables frequent monitoring of main pipeline materials during service life, providing a long-term performance record.

[0004] However, since primary-circuit main pipelines typically operate in high-dose environments, personnel and equipment entering them face risks such as dose absorption and accidental contamination, complicating on-site inspections. Furthermore, since the detector takes approximately five minutes to measure a set of data and must maintain pressure against the pipeline surface, this measurement method forces operators to remain relatively close to the main pipeline for extended periods, significantly increasing their radiation dose. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a nuclear power plant pipeline thermoelectric potential measuring device.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A nuclear power plant pipeline thermoelectric potential measuring device is constructed, comprising:

[0008] A detector, comprising a probe abutting against the pipeline to measure the thermoelectric potential;

[0009] A probe positioning assembly, wherein a positioning cavity is provided in the probe positioning assembly, and the detector is detachably disposed in the positioning cavity; one end of the positioning cavity is through-hole so as to allow the probe to abut against the pipe during measurement; and

[0010] An elastic band is arranged around the circumference of the pipeline, and both ends of the elastic band are respectively installed on the probe positioning assembly and are respectively located on opposite sides of the positioning cavity; at least one end of the elastic band is detachably connected to the probe positioning assembly.

[0011] In some embodiments, the probe positioning assembly includes a positioning member and at least one clamping structure for clamping the detector so that the probe abuts against the pipe during measurement; the positioning member is cylindrical in shape, and the positioning cavity is the inner cavity of the cylindrical positioning member; the clamping structure is located at one end of the positioning member.

[0012] In some embodiments, the pressing structure includes at least one elastic member, and at least one end of the elastic member is detachably connected to the positioning member.

[0013] In some embodiments, the number of the elastic members is two, and the clamping structure further includes a clamping member; the first ends of the two elastic members are respectively connected to the two ends of the clamping member, and the second ends of the two elastic members are respectively detachably arranged on the opposite sides of the positioning member.

[0014] In some embodiments, hooks are provided at both ends of the elastic member, first connecting holes are formed on the opposite sides of the positioning member, and second connecting holes are formed at both ends of the clamping member. The hooks at both ends of the elastic member are respectively detachably provided in the first connecting hole and the second connecting hole.

[0015] In some embodiments, the positioning member includes a cylindrical main body and at least two first connecting parts; the at least two first connecting parts are arranged on the outer wall surface of the main body at intervals along a direction parallel to the axis of the main body, and at least one end of the elastic member can be selectively detachably connected to one of the first connecting parts.

[0016] In some embodiments, the number of the pressing structures is at least two, and at least two of the pressing structures are arranged in parallel and spaced apart at one end of the positioning member.

[0017] In some embodiments, the positioning member is recessed from one end away from the pressing structure toward one end close to the pressing structure to form at least one groove.

[0018] In some embodiments, the cross-section of the positioning member perpendicular to the axis is rectangular, the elastic band and the clamping structure are connected to two opposite surfaces of the positioning member, and the groove is formed on the remaining two opposite surfaces of the positioning member.

[0019] In some embodiments, the probe positioning assembly includes a main body for accommodating the detector and at least one second connecting portion, wherein the second connecting portion is provided on the main body, and the end of the elastic band is detachably connected to the probe positioning assembly through the second connecting portion.

[0020] Beneficial effects of the utility model:

[0021] The present application cooperates with the elastic band and the probe positioning assembly so that during the detector detection process, the detector can be subjected to a uniform and continuous pressing force, ensuring that the probe of the detector is continuously in contact with the wall of the pipeline, avoiding uneven pressing of the detector by the operator holding it, and ensuring the accuracy of the detection; during use, the operator can install the elastic band and the probe positioning assembly on the pipeline, and realize the contact between the detector and the pipeline through the elastic band and the probe positioning assembly. During the operation of the detector, the operator can stay away from the pipeline, thereby shortening the time the operator approaches the pipeline and reducing the radiation dose of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0023] Figure 1 This is a schematic diagram of a nuclear power plant pipeline thermoelectric potential measuring device in use according to an embodiment of the present application;

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure of the detector;

[0025] Figure 3 yes Figure 1 Schematic diagram of the structure of the probe positioning component. DETAILED DESCRIPTION

[0026] In order to provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front," "back," "up," "down," "left," "right," "vertical," "horizontal," "bottom," "inside," "inside," and "outside" are based on the directions or positional relationships shown in some of the accompanying drawings and are constructed and operated in specific directions. They are merely for the purpose of facilitating the description of the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limitations on the present invention.

[0027] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0029] like Figures 1 to 3 As shown, the present application constructs a nuclear power plant pipeline thermoelectric potential measurement device 1, which includes a detector 10, a probe positioning assembly 20, and an elastic band 30. The detector 10 is used to measure the thermoelectric potential of the pipeline 1. The elastic band 30 is mounted on the probe positioning assembly 20 at both ends, and is used to surround the circumference of the pipeline 2 during thermoelectric potential detection and to position the probe positioning assembly 20 on the pipeline 2. The probe positioning assembly 20 is used to mount the detector 10 and, in conjunction with the elastic band 30, allows the detector 10 to abut against the pipeline 2 during detection.

[0030] Specifically, the detector 10 includes a probe 11, which is used to abut against the pipe 2 during the detection process to perform detection. The probe positioning assembly 20 is provided with a positioning cavity 2111. This cavity 2111 is used to accommodate the detector 10, and the detector 10 is detachably mounted within the cavity 2111. One end of the cavity 2111 is provided through, and the probe 11 is inserted through this through-end, so that the probe 11 abuts against the pipe 2 during measurement through the through-end of the cavity 2111.

[0031] The two ends of the elastic band 30 are disposed on the probe positioning assembly 20 at opposite sides of the positioning cavity 2111 , so as to achieve positioning of the probe positioning assembly 20 and the detector 10 disposed in the positioning cavity 2111 on the pipeline 2 .

[0032] At least one end of the elastic band 30 is detachably connected to the probe positioning assembly 20 to facilitate assembly and disassembly on the pipeline 2 . The nuclear power plant pipeline thermoelectric potential measuring device 1 can be used to perform detection at different locations on the pipeline 2 .

[0033] By providing the probe positioning assembly 20, the present application allows the detector 10 to be detachably disposed within the probe positioning assembly 20, thereby enabling flexible replacement of the detector 10. When problems such as damage occur to the detector 10, it is not necessary to replace the entire nuclear power plant pipeline thermoelectric potential measurement device 1; only a new detector 10 is required, thereby increasing the average service life of the various components of the present application.

[0034] The present application provides an elastic band 30 connected to the probe positioning assembly 20, and connects the elastic band 30 to opposite sides of the positioning cavity 2111. This allows the probe positioning assembly 20 and the elastic band 30 to define a switchable ring structure that can be positioned on the pipe 2. At the same time, because one end of the positioning cavity 2111 of the probe positioning assembly 20 is open, when the probe positioning assembly 20 and the elastic band 30 are arranged around the pipe 2, the detector 10 located in the positioning cavity 2111 can contact the side wall of the pipe 2 through the open end of the positioning cavity 2111, thereby enabling detection operations.

[0035] The present application utilizes the cooperation of the elastic band 30 and the probe positioning assembly 20 so that during the detection process of the detector 10, the detector 10 can be subjected to a uniform and continuous pressing force, ensuring that the probe 11 of the detector 10 is continuously in contact with the wall of the pipe 2, avoiding the uneven pressing of the operator holding the detector 10, and ensuring the accuracy of the detection.

[0036] The present application arranges that at least one end of the elastic band 30 is detachably connected to the probe positioning assembly 20, so that during use, the operator can install the elastic band 30 and the probe positioning assembly 20 on the pipe 2 through simple operations, and can stay away from the pipe 2 during the operation of the detector 10, thereby shortening the time for the operator to approach the pipe 2 and reducing the radiation dose received by the operator.

[0037] It should be understood that the pipeline 2 in this embodiment is used as an example of a pipeline in the primary circuit of a nuclear power plant to illustrate this application. The pipeline 2 in this embodiment does not limit the application of this application to the nuclear power industry. That is, the nuclear power plant pipeline thermoelectric potential measurement device 1 constructed in this application can be applied to any pipeline within a nuclear power plant where thermoelectric potential measurement is required.

[0038] like Figure 2 As shown, in this embodiment, the detector 10 adopts an existing four-point thermoelectric potential detector. The probe 11 includes four ends, and the connecting lines of the four ends are straight lines, which respectively abut against four points of the pipeline 2 during the detection process.

[0039] In some other optional embodiments, the detector 10 may also be other existing detectors that can perform thermoelectric potential detection.

[0040] like Figure 3 As shown, in some embodiments, the probe positioning assembly 20 includes a positioning member 21 and at least one clamping structure 22. The positioning member 21 is cylindrical and is used to accommodate the detector 10. The positioning cavity 2111 is the inner cavity of the cylindrical positioning member 21. The clamping structure 22 is located at one end of the positioning member 21 to block one end of the inner cavity of the cylindrical positioning member 21, so that only one end of the positioning cavity 2111 is open and the other end is closed. The clamping structure 22 is used to clamp the detector 10 during the detection operation to ensure that the probe 11 can always maintain contact with the pipe 2 during the detection operation, thereby ensuring the detection accuracy.

[0041] During the specific detection operation, the pressing structure 22 is located at the end of the detector 10 away from the probe 11. By providing a pressing force to the detector 10 at this end, the probe 11 can be brought into contact with the pipeline 2.

[0042] It should be understood that “the compression structure 22 is located at one end of the positioning member 21” can be understood as the connection point between the compression structure 22 and the positioning member 21 being located at one end of the positioning member 21, or it can be understood as the entire compression structure 22 being approximately located at one end of the positioning member 21. This is not specifically limited here.

[0043] It should be understood that “one end of the positioning member 21 ” refers to one end of the positioning member 21 in the axial direction.

[0044] like Figure 2 As shown, in this embodiment, since the detector 10 (a four-point thermoelectric potential detector) is generally cubical, the positioning member 21 is generally rectangular and cylindrical, and its cross-section perpendicular to the axis is generally rectangular to match the shape of the detector 10 used in this embodiment. The length of the positioning member 21 in the axial direction is less than the length of the detector 10 in the corresponding direction.

[0045] In other optional embodiments, the positioning member 21 may also be in other shapes such as a cylinder, an elliptical cylinder, etc. The shape of the positioning member 21 can be set as long as it can adapt to the detector 10 and prevent the detector 10 from shaking in the positioning cavity 2111.

[0046] In some other optional embodiments, the probe positioning assembly 20 may also not be provided with a clamping structure 22. By setting the positioning member 21 as a structure with one end closed and the other end through, during the detection operation, the closed end of the positioning member 21 is abutted against the end of the detector 10 away from the probe 11, so that the probe 11 can also achieve a clamping effect on the pipeline 2.

[0047] like Figure 3 As shown, in some embodiments, the compression structure 22 includes at least one elastic member 221, at least one end of which is detachably connected to the positioning member 21. The elastic properties of the elastic member 221 can achieve a compression effect on the detector 10.

[0048] The present application provides a detachable connection between at least one end of the elastic member 221 and the positioning member 21. When the detector 10 needs to be replaced or the detection position of the detector 10 on the pipeline 2 needs to be adjusted, the elastic member 221 can be removed from the positioning member 21, thereby making the other end of the positioning cavity 2111 accessible. The detector 10 can then be removed from the positioning cavity 2111 through this end. In other words, the detachable arrangement makes the placement, replacement, and position adjustment of the detector 10 simpler and faster, without the need to disassemble the entire nuclear power plant pipeline thermoelectric potential measurement device 1, thereby improving operational efficiency and further shortening the time it takes for operators to access the pipeline 2.

[0049] Furthermore, the clamping structure 22 can also include a clamping member 222. The number of elastic members 221 in the clamping structure 22 is two. The two elastic members 221 are respectively used to connect the clamping member 222 and the positioning member 21. The elastic member 221 cooperates with the clamping member 222 to achieve a clamping effect on the detector 10.

[0050] Specifically, the first ends of the two elastic members 221 are respectively connected to the two ends of the pressing member 222 , and the second ends of the two elastic members 221 are respectively detachably disposed on the opposite sides of the positioning member 21 .

[0051] In this embodiment, the pressing member 222 is provided in the form of a longitudinal sheet, and its shape is generally concave, so as to adapt to the cubical shape of the probe 10. When the probe 10 is placed in the probe positioning assembly 20, the pressing member 222 can conform to the surface of the probe 10. When the elastic members 221 connected to the ends of the pressing member 222 have the same size and elastic coefficient, the fixed shape of the pressing member 222 can apply a uniform pressing force to the probe 10 to avoid damage to the probe 10.

[0052] In some other optional embodiments, the clamping member 222 may not be provided. By connecting the two ends of the elastic member 221 to the walls at two opposite positions of the cylindrical positioning member 21, the clamping effect on the detector 10 can also be achieved through the elastic member 221 itself.

[0053] At this time, in this embodiment, the number of the elastic member 221 can be set to one or more. When the number of the elastic member 221 is multiple, the multiple elastic members 221 can be arranged in parallel and spaced apart, or can be arranged crosswise, etc., which is not limited here.

[0054] In some other optional embodiments, the connection between the elastic member 221 and the pressing member 222 can also be a non-detachable fixed connection relationship. During the disassembly process, the elastic member 221 and the pressing member 222 are assembled and disassembled as a whole.

[0055] In some embodiments, the elastic member 221 may be a spring with a specific elastic coefficient, with hooks provided at each end. Connection holes are formed at both ends of the pressing member 222 and on opposite sides of the positioning member 21 for the hooks to be attached, thereby achieving detachable connection between the elastic member 221, the pressing member 222, and the positioning member 21.

[0056] The connection hole on the positioning member 21 is now defined as a first connection hole 2121, and the connection hole on the pressing member 222 is defined as a second connection hole 2221. The hooks at both ends of the elastic member 221 are detachably inserted into the first connection hole 2121 and the second connection hole 2221 respectively.

[0057] It should be understood that the length and elastic coefficient of the elastic member 221 need to be flexibly set according to the requirements of the abutment degree between the probe 11 of the detector 10 and the pipe 2, the positioning of the elastic band 30 and the probe positioning assembly 20 on the pipe 2, the size of the detector 10, etc., and no specific limitation is made here.

[0058] In some other optional embodiments, the elastic member 221 may also be an elastic belt structure, rope structure or other components, as long as the elastic coefficients of the elastic members 221 are the same, it is sufficient to ensure that the pressing force applied to the detector 10 is uniform.

[0059] like Figure 3As shown, in some embodiments, the positioning member 21 includes a main body 211 and at least two first connecting portions 212. The main body 211 is cylindrical and cooperates with the compression structure 22 to define a positioning cavity 2111. The first connecting portion 212 is disposed on the outer wall of the main body 211 and is configured to connect to the elastic member 221. The at least two first connecting portions 212 are spaced apart on the outer wall of the main body 211 in a direction parallel to the axis of the main body 211, so that one end of the elastic member 221 can be selectively detachably connected to one of the first connecting portions 212.

[0060] The present application sets at least two first connecting parts 212 in a direction parallel to the axis of the main body 211 and is spaced apart on the outer wall surface of the main body 211. During the assembly process, the pressing force of the clamping structure 22 on the detector 10 can be flexibly adjusted to flexibly adjust the assembly according to the on-site conditions (pipes 2 with different diameters), further ensuring the stability of the abutment between the probe 11 and the pipe 2, and then ensuring the accuracy and reliability of the detection, and avoiding the movement or falling off of the probe 11 during the detection operation. During long-term use, the design of multiple first connecting parts 212 can also prevent the elastic member 221 from becoming loose or over-compressed due to the problem of use time. If this occurs, it can be adjusted by adjusting the connection between the elastic member 221 and the first connecting part 212.

[0061] In this embodiment, the first connecting portions 212 are provided in two groups, one on each of the outer walls of the main body 211. The two groups of first connecting portions 212 correspond to two elastic members 221, respectively. The multiple first connecting portions 212 in each group are evenly spaced apart on the main body 211 along a direction parallel to the axis of the main body 211. The first connecting holes 2121 on the positioning member 21 are formed in each of the first connecting portions 212.

[0062] It should be noted that the first connection parts 212 on the opposite sides of the main body 211 can be set in a one-to-one correspondence in the axial direction of the main body 211 to ensure that the two elastic parts 221 respectively connected thereto can select the first connection parts 212 at the same axial position to apply the same elastic force to the two ends of the clamping part 222, thereby ensuring the uniformity of the clamping force applied by the clamping part 222 to the detector 10.

[0063] In some other optional embodiments, for embodiments in which the compression structure 22 is only provided with the elastic member 221 , the first connection portions 212 on opposite sides of the main body 211 may not be arranged in a one-to-one corresponding position in the axial direction of the main body 211 .

[0064] In some other optional embodiments, the plurality of first connection portions 212 may also be arranged at uneven intervals on the main body 211 .

[0065] In some embodiments, as Figure 3 As shown, the two ends of the pressing member 222 are provided with outwardly protruding lugs, and the second connection hole 2221 is formed in the lugs. The first connecting portion 212 can also be configured as a lug protruding from the outer wall surface of the positioning member 21. By providing the pressing member 222 with outwardly protruding lugs, and also configuring the first connecting portion 212 as outwardly protruding lugs, contact between the elastic member 221 and the probe 10 can be prevented when the probe 10 is assembled in the probe positioning assembly 20, thereby preventing damage to the probe 10.

[0066] In some embodiments, the number of the pressing structures 22 can be set to at least two. By providing at least two pressing structures 22 , the uniformity of the pressing force applied to the detector 10 can be further ensured.

[0067] In this embodiment, there are two pressing structures 22 , and the two pressing structures 22 are arranged in parallel and spaced apart.

[0068] In some other optional embodiments, when the number of the compression structures 22 is set to at least two, they can also be arranged in a cross arrangement, etc.

[0069] In some other optional embodiments, when a clamping structure 22 is set, the width of the clamping member 222 can be increased to increase the contact area between the clamping member 222 and the detector 10 after assembly, and the number of elastic members 221 set between the clamping member 222 and the positioning member 21 can be increased, thereby ensuring the uniformity of the clamping force applied to the detector 10.

[0070] like Figure 3 As shown, in this embodiment, both ends of the elastic band 30 are detachably connected to the main body 211 of the positioning member 21 of the probe positioning assembly 20 .

[0071] By providing detachable connections between the elastic member 221, the pressing member 222, the positioning member 21, and the elastic band 30, the present application facilitates quick assembly and disassembly of the various components, which not only improves work efficiency but also facilitates the replacement and maintenance of each component individually. If some components become contaminated or damaged, only the contaminated or damaged components need to be replaced, without having to replace the entire device.

[0072] Furthermore, the present application sets the connection between the elastic member 221 and other components to a hook form, and sets the connection between the elastic band 30 and the positioning member 21 to a snap-fit ​​structure, which can ensure safe locking after connection, avoid accidental falling off or loosening during the detection operation, ensure the safety and reliability of the equipment, and reduce the risk during the operation.

[0073] Specifically, the positioning member 21 further includes two second connecting portions 213 , which are respectively disposed on the outer side walls on opposite sides of the main body 211 and are respectively used to achieve detachable connection with the two end portions of the elastic band 30 .

[0074] It should be understood that the detachable connection between the second connecting portion 213 and the end of the elastic band 30 can be achieved by providing a hook at the end of the elastic band 30 and a connection hole on the second connecting portion 213. Alternatively, the end of the elastic band 30 can be configured as a snap-fit ​​structure, a pressable and retractable block is provided on the snap-fit ​​structure, the second connecting portion 213 is configured as a structure with a flat hole, and the snap-fit ​​structure at the end of the elastic band 30 is inserted into the second connecting portion 213 to achieve assembly of the two. When disassembly is required, the block on the snap-fit ​​structure is compressed so that it can extend from the second connecting portion 213. Other existing detachable connection forms can also be provided, which are not specifically limited here.

[0075] In other optional embodiments, the positioning member 21 may be provided with only one second connecting portion 213, which is provided on the positioning member 21 for detachably connecting one end of the elastic band 30. The other end of the elastic band 30 may be fixed to the side of the positioning member 21 opposite to the second connecting portion 213, thereby achieving convenient assembly and disassembly.

[0076] In some embodiments, the elastic band 30 can be made of nylon, which provides superior strength, wear resistance, and corrosion resistance. The smooth surface of the nylon band reduces the adhesion of radioactive particles to the pipe 2. Nylon bands are also inexpensive and disposable, requiring replacement between uses to avoid radioactive contamination.

[0077] In some other optional embodiments, the elastic band 30 can also be made of other elastic materials. It should be understood that the elastic band 30 can be selected as long as it can meet the positioning of the nuclear power plant pipeline thermoelectric potential measurement device 1 on the pipeline 2.

[0078] It should be understood that in this embodiment, since the detector 10 used is a four-point thermoelectric potential detector, during the detection process, the probe 11 has four points that need to abut against the pipeline 2. Therefore, during the detection process, the line connecting the four points of the probe 11 needs to be set parallel to the axis of the pipeline 2 to ensure that each point can abut against the pipeline 2.

[0079] Since the elastic band 30, when installed on the pipe 2, is wound around the circumference of the pipe 2 and perpendicular to the axis of the pipe 2, the connection position between the elastic band 30 and the main body 211 must be such that when the elastic band 30 is installed along the circumference of the pipe 2, the line connecting the four points of the probe 11 of the detector 10 located in the positioning cavity 2111 is parallel to the axis of the pipe 2.

[0080] That is, if Figure 1 and Figure 2 As shown, in one specific embodiment, the four points of the probe 11 are spaced apart along the length of the probe 10. Two second connecting portions 213 are provided on two opposing sidewalls of the rectangular cylindrical body 211, along the two long sides of the cross section. When the elastic band 30 is connected to the probe positioning assembly 20, the elastic band 30 extends perpendicular to the line connecting the four points of the probe 11 of the probe 10.

[0081] like Figure 3 As shown, in some embodiments, the main body 211 of the positioning member 21 is recessed from one end away from the pressing structure 22 toward the end closer to the pressing structure 22 to form at least one groove 2112. After assembly, the groove 2112 can serve as an observation window of the probe positioning assembly 20 to observe the contact between the probe 11 located in the positioning cavity 2111 and the pipe 2.

[0082] In this embodiment, there are two grooves 2112 , which are formed on two opposite side walls of the main body 211 to facilitate observation by operators.

[0083] Furthermore, the clamping structure 22 and the elastic band 30 are both connected to two identical opposite surfaces of the positioning member 21 (that is, the first connecting portion 212 and the second connecting portion 213 are arranged on the same set of opposite side walls of the main body 211), and two grooves 2112 are respectively formed on the remaining set of opposite side walls of the main body 211 where the first connecting portion 212 and the second connecting portion 213 are not arranged, so as to ensure that the field of view at the groove 2112 is unobstructed.

[0084] Specifically, on the same side wall of the main body 211 , two groups of first connection portions 212 corresponding to the two pressing structures 22 are respectively arranged on both sides of the second connection portion 213 on the side wall.

[0085] During specific use, the operator first needs to wrap the elastic band 30 around the pipe 2 to be inspected, and connect it to the positioning member 21 of the probe positioning assembly 20 so that both are positioned on the pipe 2.

[0086] Furthermore, the detector 10 is placed in the cylindrical main body 211 , and the contact between the probe 11 and the pipe 2 is determined according to the groove 2112 , and the position of the detector 10 is flexibly adjusted according to the on-site situation.

[0087] Furthermore, after the position adjustment is completed, the pressing structure 22 is connected to the main body 211 to achieve the positioning of the detector 10 .

[0088] Furthermore, the operator is away from the pipeline 2 and starts detecting the pipeline 2 by controlling the detector 10. During the detection process, the detector 10 is monitored in real time and data is recorded to facilitate subsequent analysis and evaluation of the performance and safety status of the pipeline 2.

[0089] It can be understood that the above embodiments only express some implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all fall within the scope of protection of the present application, 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 application should fall within the scope of coverage of the claims of the present application.

Claims

1. A nuclear power plant pipeline thermoelectric potential measuring device, characterized in that: include: A detector (10) comprising a probe (11) abutting against the pipeline (2) for measuring thermoelectric potential; A probe positioning assembly (20), wherein a positioning cavity (2111) is provided in the probe positioning assembly (20), and the detector (10) is detachably arranged in the positioning cavity (2111); one end of the positioning cavity (2111) is through-connected so as to allow the probe (11) to abut against the pipe (2) during measurement; and An elastic band (30) is arranged around the circumference of the pipe (2), and both ends of the elastic band (30) are respectively mounted on the probe positioning assembly (20) and are respectively located on opposite sides of the positioning cavity (2111); at least one end of the elastic band (30) is detachably connected to the probe positioning assembly (20).

2. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 1, characterized in that: The probe positioning assembly (20) comprises a positioning member (21) and at least one pressing structure (22) for pressing the detector (10) so that the probe (11) abuts against the pipe (2) during measurement; the positioning member (21) is cylindrical, and the positioning cavity (2111) is the inner cavity of the cylindrical positioning member (21); the pressing structure (22) is located at one end of the positioning member (21).

3. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 2, characterized in that: The pressing structure (22) comprises at least one elastic member (221), and at least one end of the elastic member (221) is detachably connected to the positioning member (21).

4. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 3, characterized in that: The number of the elastic members (221) is two, and the pressing structure (22) further includes a pressing member (222); the first ends of the two elastic members (221) are respectively connected to the two ends of the pressing member (222), and the second ends of the two elastic members (221) are respectively detachably arranged on opposite sides of the positioning member (21).

5. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 4, characterized in that: Hooks are provided at both ends of the elastic member (221), first connecting holes (2121) are respectively formed on opposite sides of the positioning member (21), second connecting holes (2221) are respectively formed at both ends of the pressing member (222), and the hooks at both ends of the elastic member (221) are respectively detachably provided in the first connecting hole (2121) and the second connecting hole (2221).

6. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 3, characterized in that: The positioning member (21) comprises a cylindrical main body (211) and at least two first connecting parts (212); the at least two first connecting parts (212) are arranged on the outer wall surface of the main body (211) at intervals along a direction parallel to the axis of the main body (211), and at least one end of the elastic member (221) can be selectively detachably connected to one of the first connecting parts (212).

7. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 2, characterized in that: The number of the pressing structures (22) is at least two, and at least two of the pressing structures (22) are arranged in parallel and spaced apart at one end of the positioning member (21).

8. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 2, characterized in that: The positioning member (21) is recessed at one end away from the pressing structure (22) toward one end close to the pressing structure (22) to form at least one groove (2112).

9. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 8, characterized in that: The cross section of the positioning member (21) perpendicular to the axis is rectangular, the elastic band (30) and the pressing structure (22) are both connected to two opposite surfaces of the positioning member (21), and the groove (2112) is formed on the remaining two opposite surfaces of the positioning member (21).

10. The nuclear power plant pipeline thermoelectric potential measuring device according to claim 1, characterized in that: The probe positioning assembly (20) comprises a main body (211) for accommodating the detector (10) and at least one second connecting portion (213), wherein the second connecting portion (213) is arranged on the main body (211), and the end of the elastic band (30) is detachably connected to the probe positioning assembly (20) via the second connecting portion (213).

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