Reactor internal assembly and measurement protection tool

Abstract

A reactor internal assembly and measurement protection tool comprises a main cover plate, the main cover plate is a square plate with outward extending parts on the periphery, a first overturning side plate is arranged on the periphery of the main cover plate, and a second overturning side plate is arranged on the side, away from the main cover plate, of the first overturning side plate; cushion blocks are arranged on the bottom face of the main cover plate and the bottom face of the first overturning side plate respectively. By adopting the structure, a stable and effective assembling and measuring platform is provided for operators, and the purpose of protecting workpieces is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical installation protection, and specifically relates to an assembly and measurement protection tooling for in-core components. Background Art

[0002] The assembly process of in-core components includes assembly, adjustment, welding, machining, inspection, and testing, etc. The assembly process is divided into the assembly of sub-components and the general assembly. The process of the general assembly stage includes: the assembly of the upper in-core components, the assembly of the lower in-core components, and the assembly of the upper and lower in-core components. Among them, the assembly process of the lower in-core components mainly includes the pre-assembly of the basket cylinder and the shroud, the assembly of the sub-components of the upper in-core components, the thermal shield plate of the basket cylinder, the pre-assembly of the irradiation sample rack, the installation of the basket cylinder and the lower core plate, the assembly of the basket cylinder and the shroud, etc.

[0003] In the pre-assembly stage of the basket cylinder and the shroud, it is necessary to pre-assemble the shroud-forming plate assembly and check the installation dimensions of the assembly. In the assembly stage of the basket cylinder and the shroud, processes such as installation, grinding, inspection of key shrouds, installation of the upper in-core components, centering, and inspection of the shroud cavity need to be carried out on the lower core plate. There are 354 fuel assembly lower positioning pins densely distributed on the lower core plate, which is not conducive to the operation of operators standing and operating. Therefore, it is necessary to design a special tooling in this stage to facilitate the assembly and measurement of operators and also play a protective role for products. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an assembly and measurement protection tooling for in-core components, which provides a stable and effective assembly and measurement platform for operators and realizes the purpose of protecting workpieces.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: an assembly and measurement protection tooling for in-core components, including a main cover plate. The main cover plate is a square plate member with outwardly extending parts around it. First flipping side plates are provided around the main cover plate, and second flipping side plates are provided on the side of the first flipping side plates away from the main cover plate.

[0006] Pad blocks are respectively provided on the bottom surface of the main cover plate and the bottom surface of the first flipping side plates.

[0007] In a preferred solution, the first flipping side plates are connected to the main cover plate through hinges, and the second flipping side plates are also connected to the first flipping side plates through hinges.

[0008] In a preferred solution, the outwardly extending part of the side of the main cover plate has the same size as the first flipping side plates, and the first flipping side plates can be flipped around the hinges to form a stack with the outwardly extending part of the side of the main cover plate.

[0009] In a preferred embodiment, a second flip side plate placement groove is provided in the middle of the first flip side plate. The second flip side plate is arranged on one side of the second flip side plate placement groove, and the second flip side plate can be flipped around the hinge to be placed in the second flip side plate placement groove.

[0010] In a preferred embodiment, a flip-through plate is provided in the middle of the main cover plate. The flip-through plate is arranged on the middle access hole of the main cover plate and is connected to the main cover plate through a hinge.

[0011] In a preferred embodiment, a plurality of lifting rings are provided on the top surface of the main cover plate.

[0012] In a preferred embodiment, the height of the spacer block is greater than the height of the lower positioning pin part of the fuel assembly on the top surface of the lower core plate.

[0013] The in-core component assembly and measurement protection tooling provided by the present utility model, by adopting the above structure, has the following beneficial effects:

[0014] (1) Effectively control the quality of the assembly and detection in the in-core component general assembly stage, avoid the risk of knocking and scratching during the assembly and detection of the product, and ensure that the product manufacturing inspection is qualified at one time;

[0015] (2) The multi-stage flip side plates are connected to the four peripheral edges of the main cover plate through hinges, and the operator can perform flip operations at any time, which can meet the adjustment and measurement requirements of the shroud assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further illustrates the present utility model in conjunction with the drawings and embodiments:

[0017] Figure 1 It is a schematic top view structure of the present utility model.

[0018] Figure 2 It is a schematic bottom view structure of the present utility model.

[0019] Figure 3 It is a schematic structure diagram of the lower in-core component of the present utility model.

[0020] In the figure: main cover plate 1, first flip side plate 2, second flip side plate 3, second flip side plate placement groove 4, lifting ring 5, flip-through plate 6, spacer block 7, lower core plate 8, lower positioning pin of fuel assembly 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] As Figures 1-3 shown in [reference], an in-core component assembly and measurement protection tooling includes a main cover plate 1. The main cover plate 1 is a square plate member with outwardly extending parts around the perimeter. First flip side plates 2 are provided around the perimeter of the main cover plate 1, and second flip side plates 3 are provided on the sides of the first flip side plates 2 away from the main cover plate 1;

[0022] A spacer block 7 is respectively provided on the bottom surface of the main cover plate 1 and the bottom surface of the first flipping side plate 2.

[0023] In a preferred embodiment, the first flipping side plate 2 is connected to the main cover plate 1 through a hinge, and the second flipping side plate 3 is also connected to the first flipping side plate 2 through a hinge.

[0024] In a preferred embodiment, the part of the main cover plate 1 extending outward on the side is the same size as the first flipping side plate 2, and the first flipping side plate 2 can be flipped around the hinge to form a stack with the part of the main cover plate 1 extending outward on the side.

[0025] In a preferred embodiment, a second flipping side plate placement groove 4 is provided in the middle of the first flipping side plate 2, the second flipping side plate 3 is arranged on one side of the second flipping side plate placement groove 4, and the second flipping side plate 3 can be flipped around the hinge to be placed in the second flipping side plate placement groove 4.

[0026] In a preferred embodiment, a flipping access plate 6 is provided in the middle of the main cover plate 1, the flipping access plate 6 is arranged on the middle access hole of the main cover plate 1 and is connected to the main cover plate 1 through a hinge.

[0027] In a preferred embodiment, a plurality of lifting rings 5 are provided on the top surface of the main cover plate 1.

[0028] In a preferred embodiment, the height of the spacer block 7 is greater than the height of the part of the fuel assembly lower positioning pin 9 on the top surface of the lower core plate 8.

[0029] For an in-core structure assembly and measurement protection tooling provided by the present novelty, the process during component assembly and measurement operations is as follows:

[0030] Use a lifting device to lift the entire tooling through the lifting ring 5 to an appropriate position above the lower core plate 8.

[0031] Flip the first flipping side plate 2 and the second flipping side plate 3 until the main cover plate 1 is fully unfolded to realize the unfolding of the working platform.

[0032] The operator enters the working area through the flipping access plate 6 to perform the assembly, adjustment or measurement work of the in-core structure.

[0033] During the work, each part of the tooling closely fits the lower core plate 8, and the spacer block 7 ensures the safety of the fuel assembly and avoids damage caused by accidental collision. When the basket cylinder and the shroud are pre-installed and a special adjustment and support tooling is required, by flipping the first flipping side plate 2 and the second flipping side plate 3, a part of the lower core plate 8 can be exposed, and relying on the through holes on the lower core plate 8 to cooperate with the special adjustment support tooling, the sub-assembly can be accurately adjusted and effectively fixed.

[0034] After the work is completed, restore the flipped side plate to its original position and remove the tooling through the hoisting equipment.

[0035] During the above process, since the operator needs to lift the product into and out of the internals of the reactor vessel multiple times, the overall assembly and measurement protection tooling for the internals of the reactor vessel can be made of nylon material, and the overall weight is controlled below 1000KG, effectively reducing the working pressure of the hoisting equipment for repeated hoisting.

Claims

1. A protective tool for assembly and measurement of pile internal components, characterized in that: The main cover plate (1) is a square plate with outwardly extending portions on four sides, a first flip side plate (2) is provided on four sides of the main cover plate (1), and a second flip side plate (3) is provided on a side of the first flip side plate (2) away from the main cover plate (1); Pads (7) are respectively provided on the bottom surface of the main cover plate (1) and the bottom surface of the first flip side plate (2).

2. The protective tooling for assembling and measuring pile internal components according to claim 1, characterized in that: The first flip side panel (2) is connected to the main cover panel (1) via a hinge, and the second flip side panel (3) is also connected to the first flip side panel (2) via a hinge.

3. The protective tooling for assembly and measurement of in-pile components according to claim 2, characterized in that: The portion of the main cover plate (1) extending outwardly from the side is of the same size as the first flip side plate (2), and the first flip side plate (2) can be flipped around the hinge to form a stack with the portion of the main cover plate (1) extending outwardly from the side.

4. The protective tooling for assembling and measuring pile internal components according to claim 2, characterized in that: A second flip side panel placement groove (4) is provided in the middle of the first flip side panel (2), the second flip side panel (3) is arranged on one side of the second flip side panel placement groove (4), and the second flip side panel (3) can be flipped around the hinge to be placed in the second flip side panel placement groove (4).

5. The protective tooling for assembling and measuring pile internal components according to claim 1, characterized in that: A flip-over plate (6) is provided in the middle of the main cover plate (1); the flip-over plate (6) is arranged on a manhole in the middle of the main cover plate (1) and is connected to the main cover plate (1) via a hinge.

6. The protective tooling for assembling and measuring pile internal components according to claim 1, characterized in that: A plurality of lifting rings (5) are provided on the top surface of the main cover plate (1).

7. The protective tooling for assembling and measuring pile internal components according to claim 1, characterized in that: The height of the cushion block (7) is greater than the height of the lower positioning pin (9) of the fuel assembly located on the top surface of the lower core plate (8).

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