A pre-assembly tool for the upper thermal insulation layer of a steam generator

Abstract

The present application relates to the technical field of steam generator metal thermal insulation layer manufacturing and processing, in particular to a steam generator upper thermal insulation layer pre-assembly tool, which provides a tool structure for pre-assembly of the upper thermal insulation layer of a CAP1400 steam generator. The tool structure is simple and reasonable, and facilitates the inspection of various size requirements of the thermal insulation layer. The tool can check the overall appearance quality, assembly size, interface size and gap and edge error between thermal insulation blocks of the upper metal thermal insulation layer of the steam generator, thereby reducing the difficulty of on-site installation and the rework rate of the thermal insulation blocks.

Description

Technical Field

[0001] This invention relates to the field of manufacturing and processing technology of metal insulation layers for steam generators, and specifically to a pre-assembly tooling for the upper insulation layer of a steam generator. Background Technology

[0002] The biggest difference in insulation material selection for third-generation nuclear power plants is the widespread use of new types of reflective metal insulation materials, which effectively reduce heat loss from primary circuit equipment such as pressure vessels, evaporators, pumps, and pipelines. The metal insulation panels can be either detachable or non-detachable. The upper insulation layer of the steam generator is entirely detachable, connected with snap fasteners.

[0003] The metal insulation layer of the steam generator has a large diameter, high height, and high requirements for installation dimensional accuracy. It is necessary to conduct in-factory pre-assembly to check the overall assembly dimensions and main interface dimensions of the insulation layer, and to ensure that the gaps and misalignments between the metal insulation blocks meet the technical requirements to ensure the smooth installation of the insulation layer on the nuclear power plant site. Therefore, it is necessary to develop a pre-assembly tooling for the upper insulation layer of the steam generator to realize the in-factory segmented pre-assembly of the metal insulation layer of the steam generator. Summary of the Invention

[0004] The purpose of this invention is to provide a pre-assembly fixture for the upper insulation layer of a steam generator, so as to solve the problem of in-factory segmented pre-assembly of the metal insulation layer of a steam generator.

[0005] The present invention provides a pre-assembly fixture for the upper insulation layer of a steam generator, comprising a first fixture section, a second fixture section, a third fixture section, a fourth fixture section, an extension fixture section, a support rod for the second fixture section, a middle transverse fixture section, a support rod for the first fixture section, a top transverse fixture section, a top support rod, a top fixing plate, and fixture section connectors.

[0006] The third tooling section is installed on the top of the fourth tooling section. One end of the third tooling section is connected to the second tooling section, and the other end of the third tooling section is connected to the extension tooling section. The extension tooling section is used to connect newly added extension tooling sections. A second tooling section support rod is installed on the side wall of the second tooling section. The first tooling section and the second tooling section are connected by the tooling section connector. The middle transverse tooling section is installed on the side wall at the connection position between the first tooling section and the second tooling section. A first tooling section support rod is installed on the side wall of the first tooling section. The top fixing plate is installed on the top of the first tooling section. The top transverse tooling section is installed on the side wall of the first tooling section in the direction of the top fixing plate. The top support rod is installed between the top transverse tooling section and the top fixing plate.

[0007] Furthermore, the second tooling section support rod is inclined from the middle transverse tooling section toward the third tooling section.

[0008] Furthermore, the first tooling section support rod is inclined from the top transverse tooling section to the middle transverse tooling section.

[0009] Furthermore, the top support rod is located in the middle region between the two first tooling sections on the top transverse tooling section.

[0010] Furthermore, the top fixing plate is provided with connection holes that match the first tooling section and the second tooling section.

[0011] Furthermore, the first tooling segment and the second tooling segment are located on a vertical line, and the angle between the first tooling segment, the second tooling segment, and the third tooling segment is a perpendicular angle.

[0012] Furthermore, the top fixing plate is provided with a connection hole that matches the first tooling section, and the top fixing plate is composed of at least six fan-shaped assembly pieces.

[0013] This invention offers the following advantages: It provides a pre-assembly fixture for the upper insulation layer of a steam generator. Specifically, it addresses the need for pre-assembly checks of assembly, interface dimensions, insulation block gaps, and misalignment after the metal insulation layer is manufactured in the factory. This solves the problem of factory pre-assembly of the upper insulation layer of the CAP1400 steam generator after its workshop manufacturing. The invention provides a simple and reasonable fixture structure for pre-assembling the upper insulation layer of the CAP1400 steam generator. This fixture facilitates the inspection of various dimensional requirements of the insulation layer. It enables the pre-assembly of the upper metal insulation layer of the steam generator for overall appearance quality, assembly dimensions, interface dimensions, and gaps / misalignment between insulation blocks, reducing on-site installation difficulty and the rate of insulation block rework. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Fig. 1 This is a schematic diagram of the front view structure provided by the present invention.

[0016] Fig. 2 This is a three-dimensional structural diagram provided for the present invention.

[0017] Illustration: 1. First tooling section, 2. Second tooling section, 3. Third tooling section, 4. Fourth tooling section, 5. Platform, 6. Extension tooling section, 7. Support rod of the first tooling section, 8. Middle transverse tooling section, 9. Support rod of the first tooling section, 10. Top transverse tooling section, 11. Top support rod, 12. Top fixing plate. Detailed Implementation

[0018] like Figs. 1-2 As shown, this embodiment of the invention provides a pre-assembly fixture for the upper insulation layer of a steam generator, including a first fixture section 1, a second fixture section 2, a third fixture section 3, a fourth fixture section 4, an extension fixture section 6, a second fixture section support rod 7, a middle transverse fixture section 8, a first fixture section support rod 9, a top transverse fixture section 10, a top support rod 11, a top fixing plate 12, and a fixture section connector 13;

[0019] The third tooling section 3 is installed on the top of the fourth tooling section 4. One end of the third tooling section 3 is connected to the second tooling section 2, and the other end of the third tooling section 3 is connected to the extension tooling section 6. The extension tooling section 6 is used to connect the newly added extension tooling section 6. The second tooling section 2 is equipped with a second tooling section support rod 7 on its side wall. The first tooling section 1 and the second tooling section 2 are connected by the tooling section connector 13. The middle transverse tooling section 8 is installed on the side wall at the connection position between the first tooling section 1 and the second tooling section 2. The first tooling section support rod 9 is installed on the side wall of the first tooling section 1. The top fixing plate 12 is installed on the top of the first tooling section 1. The top transverse tooling section 10 is installed on the side wall of the first tooling section 1 in the direction of the top fixing plate 12. The top support rod 11 is installed between the top transverse tooling section 10 and the top fixing plate 12.

[0020] Specifically, the second tooling section support rod 7 is inclined from the middle transverse tooling section 8 toward the third tooling section 3. The second tooling section support rod 7 is used to support the overall frame.

[0021] Specifically, the first tooling section support rod 9 is inclined from the top transverse tooling section 10 toward the middle transverse tooling section 8. The first tooling section support rod 9 is used to support the overall frame. The first tooling section support rod 9 and the second tooling section support rod 7 are inclined in opposite directions, thereby providing two different directions of support for the overall frame.

[0022] Specifically, the top support rod 11 is located in the middle region of the two first tooling sections 1 on the top transverse tooling section 10. The top support rod 11 is used to provide support for the top fixed plate 12.

[0023] Specifically, the top fixing plate 12 is provided with connecting holes that match the first tooling section 1 and the second tooling section 2. The top fixing plate 12 is provided with connecting holes that connect to the first tooling section 1 and the second tooling section 2.

[0024] Specifically, the first tooling section 1 and the second tooling section 2 are located on a vertical line, and the angle between the first tooling section 1, the second tooling section 2 and the third tooling section 3 is a vertical angle.

[0025] Specifically, the top fixing plate 12 is provided with a connection hole that matches the first tooling section 1, and the top fixing plate 12 is composed of at least six sector-shaped assembly pieces. The technical solution of this application adopts a modular design, designing the top fixing plate 12 to be composed of at least six sector-shaped assembly pieces. When one of them is damaged, the damaged one can be replaced, avoiding the need to replace the entire top fixing plate 12.

[0026] Specifically, each sector-shaped assembly piece of the top fixing plate 12 is provided with a connecting block in the middle. The connecting block is used to connect other devices, increasing the scalability of this technical solution.

[0027] Specifically, each sector-shaped assembly piece of the top fixing plate 12 corresponds to two first tooling sections 1 below it, each first tooling section 1 corresponds to one second tooling section 2 below it, and the bottom side of the second tooling section 2 corresponds to one third tooling section 3. This structural design enhances the overall framework of the technical solution of this application.

[0028] This invention patent provides a pre-assembly fixture for the upper insulation layer of a steam generator, which has been successfully applied in the CAP1400 pressurized water reactor project in China. During the pre-assembly process in the factory, this fixture provides a basis for checking the overall appearance quality, assembly dimensions, interface dimensions, and misalignment of the insulation block gaps. The metal insulation layer met customer requirements during subsequent on-site installation at the nuclear power plant.

[0029] The tooling of this invention is divided into multiple parts (first tooling section, second tooling section, etc.), which makes the tooling easier to manufacture, transport, and assemble. At the same time, the modular design also facilitates flexible adjustment and expansion according to different needs.

[0030] Scalability is achieved through the design of extended tooling sections, which can be easily connected to new tooling sections to accommodate the pre-assembly requirements of insulation layers of different sizes and shapes.

[0031] Stability is enhanced through the design of multiple support rods (such as the support rods of the first and second tooling sections) and transverse tooling sections, thereby improving the overall stability and load-bearing capacity of the tooling.

[0032] Practicality and application effect: Improves pre-assembly accuracy. This tooling has been successfully applied in the CAP1400 pressurized water reactor project in China, providing a precise basis for the assembly of metal insulation blocks and ensuring the accuracy of assembly dimensions and interface dimensions.

[0033] Improving Appearance Quality: By using this tooling, the appearance quality of the metal insulation blocks has been significantly improved, meeting the customer's stringent requirements.

[0034] The tooling design also makes it easier and more accurate to check the misalignment of the insulation block gaps.

[0035] Structural and functional features: The top fixing plate design consists of at least six fan-shaped assembly pieces, which not only provides a stable connection with the first and second tooling sections, but also increases the flexibility and adaptability of the structure through its fan-shaped design.

[0036] The support rod layout, with its inclined first and second tooling section support rods, effectively distributes the load borne by the tooling and improves the overall structural stability.

[0037] The interface design, the connection methods between tooling sections, and the design of the connection holes on the top fixing plate all demonstrate the meticulous consideration given to the interface of this tooling, ensuring the accuracy and ease of assembly.

[0038] In summary, the pre-assembly fixture for the upper insulation layer of the steam generator provided by this invention demonstrates a high degree of innovation and practicality in its design. Its successful application in the domestic CAP1400 pressurized water reactor project further proves the significant effect of this fixture in improving the quality, efficiency, and precision of the pre-assembly of the insulation layer.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the 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 pre-assembly fixture for the upper insulation layer of a steam generator, characterized in that, It includes the first tooling section (1), the second tooling section (2), the third tooling section (3), the fourth tooling section (4), the extension tooling section (6), the second tooling section support rod (7), the middle transverse tooling section (8), the first tooling section support rod (9), the top transverse tooling section (10), the top support rod (11), the top fixing plate (12), and the tooling section connector (13). The third tooling section (3) is horizontally installed on the top of the fourth tooling section (4). The first tooling section (1) and the second tooling section (2) are both arranged vertically along the circumference. One end of the third tooling section (3) is connected to the second tooling section (2), and the other end of the third tooling section (3) is connected to the extension tooling section (6). The extension tooling section (6) is used to connect newly added extension tooling sections. A second tooling section support rod (7) is installed and connected between the side walls of adjacent second tooling sections (2). The first tooling section (1) and the second tooling section (2) are connected by the tooling section connector (13). The first tooling section (1) is located at the junction with the second tooling section (2). The middle transverse tooling section (8) is installed on the side wall at the connection position. The middle transverse tooling section (8) is located between adjacent second tooling sections (2). The first tooling section support rod (9) is installed and connected between the side walls of adjacent first tooling sections (1). The top fixing plate (12) is installed on the top of the first tooling section (1). The top transverse tooling section (10) is installed on the side wall of the first tooling section (1) in the direction of the top fixing plate (12). The top transverse tooling section (10) is located between adjacent first tooling sections (1). The top support rod (11) is installed between the top transverse tooling section (10) and the top fixing plate (12). The second tooling section support rod (7) is inclined from the middle transverse tooling section (8) to the third tooling section (3); The first tooling section support rod (9) is inclined from the top transverse tooling section (10) toward the middle transverse tooling section (8); The top support rod (11) is located in the middle area of ​​the two first tooling sections (1) on the top transverse tooling section (10); The first tooling section (1) and the second tooling section (2) are located on a vertical line, and the angle between the first tooling section (1), the second tooling section (2) and the third tooling section (3) is a vertical angle; Each sector assembly piece of the top fixing plate (12) corresponds to two first tooling sections (1) below it, each first tooling section (1) corresponds to a second tooling section (2) below it, and the bottom side direction of the second tooling section (2) corresponds to a third tooling section (3).

2. The pre-assembly fixture for the upper insulation layer of a steam generator according to claim 1, characterized in that, The top fixing plate (12) is provided with a connection hole that matches the first tooling section (1), and the top fixing plate (12) is composed of at least six fan-shaped assembly pieces.

3. The pre-assembly fixture for the upper insulation layer of a steam generator according to claim 2, characterized in that, Each sector-shaped assembly piece of the top fixing plate (12) is provided with a connecting block in the middle.

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