Nuclear power station spherical surface arc degree measuring device and measuring method

Abstract

The invention relates to the technical field of measuring tools, in particular to a nuclear power station spherical surface arc degree measuring device and method, and the device comprises a template ruler main body which is of a long-strip-shaped structure; the vertical connecting component is mounted on the template ruler main body, the length direction of the vertical connecting component is perpendicular to the length direction of the template ruler main body, and the vertical connecting component can be kept perpendicular to a to-be-measured surface in a state of being connected with the to-be-measured surface; the plurality of measuring scales are arranged on the sample plate ruler main body, are arranged at intervals along the length direction of the sample plate ruler main body, are arranged in parallel with the vertical connecting component and can slide along the length direction of the measuring scales, and at least one end of each measuring scale extends out of the same side of the sample plate ruler main body; and the locking component is arranged on the template ruler main body, can lock the position of the measuring ruler, is suitable for measuring various arc-degree surfaces, is simple to operate and relatively high in measuring precision, and can be used for measuring the radian in the manufacturing or splicing process of an arch structure or a dome structure of a nuclear power station. The measuring method is based on the measuring device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring tools, in particular to a nuclear power plant spherical arc measurement device and a measurement method. BACKGROUND

[0002] The dome is a main component of the nuclear power plant safety shell, which is divided into an inner dome and an outer dome. Both of them are similar in structure and are double curvature shaped hemispherical structures, which play the roles of preventing leakage and prestressed concrete formwork, and the whole is a thin-walled large-diameter structure. The manufacturing process adopts block structure prefabrication and overall structure assembly construction. The spherical structure is a double curvature structure, which has very high requirements for construction and installation accuracy and eccentricity control. Therefore, the overall size requirement and the arc degree precision requirement of the assembly process design need to be ensured.

[0003] Among them, the arc degree refers to the roundness of the arc, which is mainly determined by the arc length and chord length. In order to ensure its accuracy, the detection of the arc degree radius and the arc degree measurement are very important. According to the existing technology in the industry, there are many methods for detecting the radius of the arc degree and measuring the arc degree, such as measuring the arc degree and radius through the coordinate system, detecting the computer calculation method through the sensor, and measuring through the three-dimensional coordinate system. Among them, the contact type and scanning type detection can measure the corresponding radius and arc degree, but the detection accuracy is low. In addition, the detection of the arc degree can also be carried out through the corresponding device, but the existing arc degree detection equipment has a complex structure, and the operation is too complex, which requires high requirements for the operator. In addition, the price is expensive and requires operating experience, and the general applicability is not high.

[0004] Therefore, in the prior art, for the detection of the arc degree of the nuclear power plant, a circular arc radius sample with the same arc radius as the nuclear power plant dome and the reverse shape is designed for comparison measurement. Although the measurement accuracy is high, the measurement efficiency is low and the labor intensity of measurement is large. SUMMARY

[0005] In order to solve the technical problems of low measurement efficiency and high labor intensity of the existing nuclear power plant dome arc degree, the present application provides a nuclear power plant spherical arc degree measurement device and a measurement method, which is suitable for the measurement of various arc degree surfaces, and has simple operation, high measurement accuracy, and can measure the arc degree during the manufacturing or assembly process of the nuclear power plant arch structure or dome structure.

[0006] The present application is realized by the following technical solutions:

[0007] In a first aspect, the present application provides a nuclear power plant spherical arc measurement device, comprising: a template ruler body, which is in a long strip structure; a vertical connecting member, which is connected to the middle part of the template ruler body and is perpendicular to the length direction of the template ruler body, and can be kept perpendicular to the surface to be measured in the state of being connected to the surface to be measured; a plurality of measurement scales, which are installed on the template ruler body, are arranged at intervals along the length direction of the template ruler body, are arranged in parallel with the vertical connecting member, can slide along the length direction of each measurement scale, and extend to the same side of the template ruler body at least at one end; and a locking member, which is arranged on the template ruler body and can lock the position of the measurement scale.

[0008] The nuclear power plant spherical arc measurement device provided by the present application comprises a template ruler body, a vertical connecting member, a measurement scale and a locking member, the template ruler body is in a long strip structure and can be arranged along the chord length of the surface to be measured, the vertical connecting member is connected to the template ruler body, the measurement scale is installed on the template ruler body and arranged in parallel with the vertical connecting member, each measurement scale can be kept perpendicular to the surface to be measured, each measurement scale can slide along the length direction of the measurement scale and extend to the same side of the template ruler body at least at one end, the radius of each measurement point can be determined through the scale of each measurement scale, the circular arc of the surface to be measured can be obtained through calculation, and the position of the measurement scale can be locked by the locking member, so that the template ruler body can be taken off from the surface to be measured for reading, thereby reducing the measurement error and improving the measurement accuracy.

[0009] During measurement, the vertical connecting member is connected to the surface to be measured, the template ruler body is abutted on the surface to be measured, each measurement scale is retracted by a corresponding length according to the circular arc of the surface to be measured, the measurement scale is locked by the locking member, the measurement scale is taken off from the surface to be measured, the radius data of each measurement scale is read visually, and the reading is compared with the radius of the surface to be measured, the circular arc of the surface to be measured and the drawing requirement, so that whether the circular arc of the surface to be measured meets the standard and the drawing size deviation can be determined.

[0010] Each measurement scale can slide along the length direction of the measurement scale and is arranged at intervals along the length direction of the template ruler body, so that the surface to be measured with various chord lengths and various circular arcs can be measured, a plurality of template ruler bodies can be combined for measurement according to the actual situation on site, the application range is wide, it is not necessary to manufacture corresponding template rulers respectively, the waste of materials can be avoided, and the cost can be saved.

[0011] Therefore, the nuclear power plant spherical arc measurement device provided by the present application is suitable for the measurement of various circular arc surfaces, is simple to operate, has high measurement accuracy, and can be used for arc measurement during the manufacturing or assembling of the dome structure or the vault structure of the nuclear power plant.

[0012] In an optional embodiment of this application, both ends of the measuring scale extend to the sidewalls corresponding to the main body of the template ruler in the length direction, so as to facilitate the measurement of the inner and outer arcs of the component to be measured.

[0013] In an optional embodiment of this application, the template ruler body is provided with a plurality of mounting slots, which are spaced apart along the length direction of the template ruler body; each measuring scale is installed in the corresponding mounting slot so as to facilitate the installation of the measuring scale on the template ruler body.

[0014] In an optional embodiment of this application, a plurality of guide members are further included, each guide member being adapted to a corresponding mounting groove; the guide members are fixedly installed in the corresponding mounting grooves, the measuring scales are installed in the corresponding guide members, and the ends of each measuring scale extend outside the corresponding guide members to ensure the perpendicularity between the measuring scales and the template ruler body.

[0015] In an optional embodiment of this application, a spring-loaded drive component is further included. The spring-loaded drive component is installed in the corresponding mounting slot. The spring-loaded drive component can drive the corresponding measuring scale to reset, so as to ensure that the measuring scale can be automatically reset for the next measurement.

[0016] In an optional embodiment of this application, the measuring scale includes an inner arc measuring segment and an outer arc measuring segment; one end of the inner arc measuring segment and the outer arc measuring segment opposite to each other is defined in the mounting groove, and the inner arc measuring segment and the outer arc measuring segment are connected by the spring-loaded drive member.

[0017] In an optional embodiment of this application, the locking member is a screw rod that is screwed to the main body of the template ruler.

[0018] In an optional embodiment of this application, a locking block is adapted to the corresponding mounting slot. The locking block is screwed to the locking member so that the locking member drives each locking block to move along the length direction of the template ruler body, thereby locking the measuring scale in the corresponding mounting slot, so as to ensure that the locking member can lock all the measuring scales at the same time.

[0019] In an optional embodiment of this application, the number of measuring scales is even; the vertical connecting member is located in the middle of the template ruler body, and the measuring scales located on both sides of the vertical connecting member are symmetrically arranged about the vertical connecting member.

[0020] In one optional embodiment of this application, the measuring scale is provided with 20 scales to ensure the accuracy of the measurement results.

[0021] Secondly, the present invention provides a method for measuring the spherical curvature of a nuclear power plant, characterized in that, based on the spherical curvature measuring device for a nuclear power plant according to any one of claims 1 to 9, it includes the following steps:

[0022] S10. The template ruler is vertically connected to the surface to be measured through a vertical connecting component, and the height of the template ruler body is adjusted so that the side of the template ruler body facing the surface to be measured is pressed against the surface to be measured.

[0023] S20. After the ejector pin touches the surface to be measured, the measuring scale is locked by the locking component.

[0024] S30. Remove the measuring scale from the surface to be measured;

[0025] S40. Visually read the radius data of each measuring scale and compare the reading with the radius and curvature of the surface to be measured as required by the drawing to determine whether the curvature of the surface to be measured conforms to the standard and the dimensional deviation of the drawing.

[0026] The method for measuring the spherical curvature of a nuclear power plant provided by this invention first involves vertically connecting the measuring scale to the surface to be measured via a vertical connecting component. The main body of the template ruler is then placed against the surface to be measured, with its side facing the surface. This causes each measuring scale to retract by a corresponding length according to the curvature of the surface. The measuring scale is then locked by a locking component and removed from the surface. By visually reading the radius of each measuring scale and comparing the readings with the radius and curvature of the surface as required by the drawings, it can be determined whether the curvature of the surface meets the standard and the dimensional deviation of the drawings. This method reduces measurement errors and features high measurement accuracy.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] 1. The nuclear power plant spherical arc measurement device provided by the present invention includes a template ruler body, a vertical connecting component, a measuring scale, and a locking component. The template ruler body is a long strip structure that can extend along the chord length of the surface to be measured. The vertical connecting component is perpendicularly connected to the template ruler body. At the same time, the measuring scale is installed on the template ruler body and is set parallel to the vertical connecting component, so that each measuring scale is perpendicular to the surface to be measured. In addition, each measuring scale can slide along its own length direction, and at least one end extends to the same side of the template ruler body. The arc radius of each measuring point can be determined by the scale of each measuring scale, thereby obtaining the arc of the surface to be measured by calculation. The locking component can lock the position of the measuring scale, and the template ruler body can be removed from the surface to be measured for reading, thereby reducing measurement error and achieving high measurement accuracy. It is a template ruler that can be used for arc measurement during the fabrication or assembly of arch or dome structures in nuclear power plants.

[0029] 2. The nuclear power plant spherical arc measurement device provided by the present invention has each measuring scale that can slide along its own length direction and is set at intervals along the length direction of the template ruler body. It can measure the surface to be measured with a variety of chord lengths and arcs. Multiple template ruler bodies can also be combined for measurement according to the actual situation on site. It has a wide range of applications and eliminates the need to make corresponding template rulers separately, which can avoid material waste and save costs.

[0030] 3. The method for measuring the spherical curvature of a nuclear power plant provided by this invention first connects the measuring scale to the surface to be measured through a vertical connecting component, and then places the main body of the template ruler against the surface to be measured with its side facing the surface. This allows each measuring scale to retract by a corresponding length according to the curvature of the surface to be measured. Then, the measuring scale is locked by a locking component, and then the measuring scale is removed from the surface to be measured. By visually reading the radius data of each measuring scale and comparing the reading with the radius and curvature of the surface to be measured as required by the drawing, it can be determined whether the curvature of the surface to be measured conforms to the standard and the deviation from the drawing size. This method can reduce measurement errors and has the characteristics of high measurement accuracy. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] In the attached diagram:

[0033] Figure 1 This is a schematic diagram of the structure of the nuclear power plant spherical curvature measuring device provided in the embodiments of this application;

[0034] Figure 2 A schematic diagram of the installation structure of the measuring scale provided in the embodiments of this application;

[0035] Figure 3 This is a flowchart illustrating the method for measuring the spherical curvature of a nuclear power plant, as provided in an embodiment of this application.

[0036] The attached figures include reference numerals and their corresponding component names:

[0037] 1- Template ruler body, 2- Vertical connecting component, 3- Measuring scale, 4- Locking component, 5- Mounting groove, 6- Guide component, 7- Springback drive component, 8- Inner arc measuring section, 9- Outer arc measuring section, 10- Locking block, 11- Ejector pin. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] Example 1

[0044] Combination Figure 1This embodiment provides a spherical arc measurement device for nuclear power plants, comprising: a template ruler body 1, which is a long strip structure; a vertical connecting member 2, which is connected to the middle of the template ruler body 1 and whose length direction is perpendicular to the length direction of the template ruler body 1, and can remain perpendicular to the surface to be measured when connected to it; multiple measuring scales 3, which are installed on the template ruler body 1 and spaced apart along the length direction of the template ruler body 1, all of which are parallel to the vertical connecting member 2, and can slide along their own length direction, and at least one end of each of them extends to the same side of the template ruler body 1; and a locking member 4, which is provided on the template ruler body 1 and can lock the position of the measuring scales 3.

[0045] Combination Figure 2 The template ruler body 1 is provided with a plurality of mounting slots 5, which are spaced apart along the length direction of the template ruler body 1; each measuring scale 3 is installed in the corresponding mounting slot 5 so as to facilitate the installation of the measuring scale 3 on the template ruler body 1.

[0046] It should be understood that this embodiment also includes a plurality of guide members 6, each of which is adapted to the corresponding mounting groove 5; the guide member 6 is fixedly installed in the corresponding mounting groove 5, the measuring scale 3 is installed in the corresponding guide member 6, and the ends of each measuring scale 3 extend outside the corresponding guide member 6 to ensure the perpendicularity between the measuring scale 3 and the template ruler body 1.

[0047] Based on this, this embodiment also includes a spring-loaded drive component 7, which is installed in the corresponding mounting slot 5. The spring-loaded drive component can drive the corresponding measuring scale 3 to reset, so as to ensure that the measuring scale 3 can be automatically reset for the next measurement.

[0048] In this embodiment, both ends of the measuring scale 3 extend to the side wall corresponding to the template ruler body 1 in the length direction, so as to facilitate the measurement of the inner and outer arcs of the component to be measured.

[0049] Accordingly, the measuring scale 3 includes an inner arc measuring section 8 and an outer arc measuring section 9; one end of the inner arc measuring section 8 and the outer arc measuring section 9 is defined in the mounting groove 5, and the inner arc measuring section 8 and the outer arc measuring section 9 are connected by the spring-loaded drive member 7.

[0050] The locking component 4 is a screw rod that is screwed to the template ruler body 1.

[0051] Specifically, a locking block 10 is adapted to the corresponding mounting slot 5. The locking block 10 is screwed to the locking member 4 so that the locking member 4 drives each locking block 10 to move along the length direction of the template ruler body 1, thereby locking the measuring scale 3 in the corresponding mounting slot 5, so as to ensure that the locking member 4 can lock all the measuring scales 3 at the same time.

[0052] Generally, the number of measuring scales 3 is even; the vertical connecting member 2 is located in the middle of the template ruler body 1, and the measuring scales 3 located on both sides of the vertical connecting member 2 are symmetrically arranged about the vertical connecting member 2.

[0053] In this embodiment, the measuring scale 3 is provided with 20 scales to ensure the accuracy of the measurement results.

[0054] It should be noted that both the arc measuring segment and the outer arc measuring segment 9 have markings affixed, printed, or engraved on them, allowing direct reading of their retraction length. Pins 11 are installed at both ends of the template ruler body 1 along its length.

[0055] In summary, the nuclear power plant spherical curvature measuring device provided in this embodiment includes a template ruler body 1, a vertical connecting component 2, a measuring scale 3, and a locking component 4. The template ruler body 1 is a long strip structure that can extend along the chord length of the surface to be measured. The vertical connecting component is vertically connected to the template ruler body 1 (the height of the template ruler body 1 can be adjusted to ensure that the pin can be attached to the side of the surface to be measured). At the same time, the measuring scale 3 is installed on the template ruler body 1 and is set parallel to the vertical connecting component 2, so that each measuring scale 3 is perpendicular to the surface to be measured. In addition, each measuring scale 3 can slide along its own length direction, and at least one end extends to the same side of the template ruler body 1. The radius of curvature of each measuring point can be determined by the scale of each measuring scale 3, thereby obtaining the curvature of the surface to be measured by calculation. The locking component 4 can lock the position of the measuring scale 3, and the template ruler body 1 can be removed from the surface to be measured for reading, thereby reducing measurement error and achieving high measurement accuracy.

[0056] During measurement, simply connect the vertical connecting component 2 vertically to the surface to be measured, adjust the height of the template ruler body 1, and place the side of the template ruler body 1 facing the surface to be measured against the surface to be measured, so that the template ruler body 1 is close to the surface to be measured. This allows each measuring scale 3 to retract the corresponding length according to the curvature of the surface to be measured. After the pin 11 is against the surface to be measured, lock the measuring scale 3 with the locking component 4, and then remove the measuring scale 3 from the surface to be measured. By visually reading the radius data of each measuring scale 3 and comparing the reading with the radius and curvature of the surface to be measured as required by the drawing, it can be determined whether the curvature of the surface to be measured meets the standard and the deviation of the drawing size.

[0057] Each measuring scale 3 can slide along its own length direction and is spaced apart along the length direction of the template ruler body 1. It can measure various chord lengths and various arc degrees of the surface to be measured. Multiple template ruler bodies 1 can also be combined for measurement according to the actual situation on site. It has a wide range of applications and eliminates the need to make corresponding template rulers separately, which can avoid material waste and save costs.

[0058] In summary, the nuclear power plant spherical arc measurement device provided in this embodiment is suitable for measuring various arc surfaces, and is simple to operate with high measurement accuracy. It can serve as a template ruler for arc measurement during the fabrication or assembly of arch or dome structures in nuclear power plants.

[0059] Example 2

[0060] Combination Figure 3 This embodiment provides a method for measuring the spherical curvature of a nuclear power plant, based on the spherical curvature measuring device for a nuclear power plant described in Embodiment 1, and includes the following steps:

[0061] S10. The template ruler body 1 is vertically connected to the surface to be measured through the vertical connecting component 2, and the height of the template ruler body 1 is adjusted so that the side of the template ruler body 1 facing the side to be measured is pressed against the surface to be measured.

[0062] Specifically, the vertical connecting member 2 is vertically connected to the surface to be measured, and the side of the template ruler 1 facing the side to be measured is pressed against the surface to be measured, so that each measuring scale 3 retracts the corresponding length according to the curvature of the surface to be measured.

[0063] S20. After the ejector pin 11 touches the surface to be measured, the measuring scale 3 is locked by the locking component 4.

[0064] That is, after the pin 11 presses against the surface to be measured, each measuring scale 3 is in contact with the corresponding position of the surface to be measured. At this time, by rotating the locking mechanism 4, the locking block 10 is driven to lock the corresponding measuring scale 3 in the mounting groove, so as to avoid the measuring scale 3 moving and causing reading errors during the process of moving the template ruler body 1.

[0065] S30. Remove the measuring scale 3 from the surface to be measured.

[0066] That is, disconnect the connection between the vertical connecting member 2 and the surface to be measured.

[0067] S40. Visually read the radius data of each measuring scale 3, and compare the reading with the radius and curvature of the surface to be measured as required by the drawing to determine whether the curvature of the surface to be measured meets the standard and the deviation of the drawing size.

[0068] In other words, the nuclear power plant spherical curvature measurement method provided in this embodiment first connects the vertical connecting member 2 vertically to the surface to be measured, and then places the template ruler body 1 against the side facing the surface to be measured, so that each measuring scale 3 retracts by the corresponding length according to the curvature of the surface to be measured. Then, the measuring scale 3 is locked by the locking member 4, and then the measuring scale 3 is removed from the surface to be measured. By visually reading the radius data of each measuring scale 3 and comparing the reading with the radius of the surface to be measured and the curvature of the surface to be measured as required by the drawing, it can be determined whether the curvature of the surface to be measured meets the standard and the deviation of the drawing size. This method can reduce measurement errors and has the characteristics of high measurement accuracy.

[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. 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 device for measuring the spherical curvature of a nuclear power plant, characterized in that, include: The main body of the template ruler (1) is a long strip structure; The vertical connecting member (2) is connected to the middle part of the template ruler body (1), and its length direction is perpendicular to the length direction of the template ruler body (1). When connected to the surface to be measured, it can remain perpendicular to the surface to be measured. Multiple measuring scales (3) are provided and installed on the template ruler body (1). They are spaced apart along the length direction of the template ruler body (1), and are all parallel to the vertical connecting member (2). They can all slide along their own length direction, and at least one end of each scale extends to the same side of the template ruler body (1). The locking component (4) is provided on the template ruler body (1) and can lock the position of the measuring ruler (3).

2. The nuclear power plant spherical arc measurement device according to claim 1, characterized in that, Both ends of the measuring scale (3) extend to the side wall corresponding to the main body (1) of the template ruler.

3. The nuclear power plant spherical arc measurement device according to claim 1, characterized in that, The template ruler body (1) is provided with a plurality of mounting slots (5), and the plurality of mounting slots (5) are spaced apart along the length direction of the template ruler body (1); Each of the measuring scales (3) is installed in the corresponding mounting slot (5).

4. The nuclear power plant spherical arc measurement device according to claim 3, characterized in that, It also includes multiple guide members (6), each of which is adapted to the corresponding mounting groove (5); The guide member (6) is fixedly installed in the corresponding mounting groove (5), the measuring scale (3) is installed in the corresponding guide member (6), and the ends of each measuring scale (3) extend outside the corresponding guide member (6).

5. The nuclear power plant spherical arc measurement device according to claim 3, characterized in that, It also includes a spring-loaded drive component (7), which is installed in the corresponding mounting slot (5) and can drive the corresponding measuring scale (3) to reset.

6. The nuclear power plant spherical arc measurement device according to claim 5, characterized in that, The measuring scale (3) includes an inner arc measuring section (8) and an outer arc measuring section (9); The inner arc measuring segment (8) and the outer arc measuring segment (9) are respectively defined at opposite ends within the mounting groove (5), and the inner arc measuring segment (8) and the outer arc measuring segment (9) are connected by the springback drive member (7).

7. The nuclear power plant spherical arc measurement device according to claim 3, characterized in that, The locking component (4) is a screw rod that is screwed to the template ruler body (1).

8. The nuclear power plant spherical arc measurement device according to claim 7, characterized in that, A locking block (10) is adapted in the corresponding mounting slot (5). The locking block (10) is screwed to the locking member (4) so ​​that the locking member (4) drives each locking block (10) to move along the length direction of the template ruler body (1) and lock the measuring ruler (3) in the corresponding mounting slot (5).

9. The nuclear power plant spherical curvature measuring device according to any one of claims 1 to 8, characterized in that, The number of the measuring scales (3) is even; The vertical connecting member (2) is located in the middle of the template ruler body (1), and the measuring scales (3) located on both sides of the vertical connecting member (2) are symmetrically arranged about the vertical connecting member (2).

10. A method for measuring the spherical curvature of a nuclear power plant, characterized in that, The nuclear power plant spherical curvature measuring device according to any one of claims 1 to 9 includes the following steps: S10. The template ruler body (1) is vertically connected to the surface to be measured through the vertical connecting component (2), and the height of the template ruler body (1) is adjusted so that the side of the template ruler body (1) facing the side to be measured is pressed against the surface to be measured. S20. After the ejector pin (11) touches the surface to be measured, the measuring scale (3) is locked by the locking component (4). S30. Remove the measuring scale (3) from the surface to be measured; S40. Visually read the radius data of each measuring scale (3) and compare the reading with the radius of the surface to be measured and the arc of the surface to be measured as required by the drawing to determine whether the arc of the surface to be measured meets the standard and the deviation of the drawing size.

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