Novel test piece assembling appliance for nuclear-grade welder test

Abstract

The utility model discloses a novel test piece assembling appliance for a nuclear-grade welder test. The passing rate of a nuclear-grade welder test is crucial, the content of a manual argon tungsten-arc welding test comprises a pipe-plate corner joint test piece, and the qualification rate of the pipe-plate corner joint test piece is extremely low, is only about 40%, and is mostly caused by defects in the assembling process. The round iron comprises a round iron body (1), two sections of arc-shaped bosses (6) are arranged on the surface of the round iron body, the surface of the round iron body is divided into a first platform (2) and a second platform (3) through the two sections of arc-shaped bosses, a through long groove (5) is formed between the two sections of arc-shaped bosses on the upper surface of the round iron body, and a through hole (4) is formed in the middle of the second platform. The test piece assembling tool is used for the nuclear-grade welder test.

Description

Technical Field

[0001] The utility model relates to a specimen assembly device for a new type of nuclear-level welder examination. Technical Background

[0002] The "Regulations on the Qualification Management of Welding Personnel for Civil Nuclear Safety Equipment (HAF 603)" is the regulation on the qualifications of welding personnel for civil nuclear safety equipment in China. For the welding of nuclear-level equipment, the welder must possess the qualifications of "HAF 603", so the passing rate of the nuclear-level welder examination is crucial. According to the provisions of "HAF 603", the content of the manual tungsten inert gas arc welding examination includes the tube and plate fillet weld specimen, and the qualified rate of the tube and plate fillet weld specimen is extremely low, only about 40%, mostly due to defects in the assembly process.

[0003] In summary, a new type of specimen assembly device for nuclear-level welder examination is needed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem of welding quality caused by tube-plate assembly defects, and a new type of specimen assembly device for nuclear-level welder examination is provided.

[0005] To solve the above deficiencies, the utility model adopts the following technical solutions:

[0006] A new type of specimen assembly device for nuclear-level welder examination, which consists of a circular iron. Two arc-shaped bosses are provided on the surface of the circular iron, and the surface of the circular iron is divided into platform one and platform two by the two arc-shaped bosses. There is a through groove between the two arc-shaped bosses on the upper surface of the circular iron. A through hole is provided in the middle of platform two. An assembly device iron plate is placed on platform one, and the edge of the hole wall of the iron plate fits the outer diameter edge of the arc-shaped boss. An assembly device iron tube is placed on platform two, and the outer wall of the iron tube fits the inner edge of the arc-shaped boss. The joint of the iron plate and the iron tube is welded by spot welding.

[0007] The through hole is a circular through hole.

[0008] Platform two is 0.5 mm higher than platform one. Beneficial Effects

[0009] 1. During the welding process of the utility model, due to the input of a large amount of heat, deformation will occur at the root of the tube and the plate. After assembling with this device, reverse deformation will be left, which can offset the influence caused by the deformation at the root of the tube and the plate.

[0010] 2. When using this device of the utility model for the assembly of the tube and the plate, it can ensure that the tube is perpendicular to the plate and achieve precise assembly without edge mismatch.

[0011] 3. During the assembly of the present utility model, the gap reserved between the pipe and the plate can be ensured to be uniform, effectively avoiding excessive back weld reinforcement in some areas due to uneven gaps.

[0012] 4. During the spot welding stage of the assembly of the present utility model, the grooves provided in its internal structure can effectively control the argon gas flow rate, avoid the occurrence of argon gas turbulence, and ensure the spot welding quality.

[0013] 5. The present utility model can achieve rapid assembly in the test piece welding of the new nuclear power welder examination requirements, eliminate the influence of the psychological tension factor of the welder caused by insufficient time, and can better exert the due skill level.

[0014] 6. The structure of this device is delicate, light in weight, portable, and very convenient and fast to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 is the front view of the present utility model;

[0016] Attached Figure 2 is the top view of the present utility model;

[0017] Attached Figure 3 is the structure diagram of the present utility model.

[0018] In the figure: 1. Circular iron; 2. Platform 1; 3. Platform 2; 4. Circular through hole; 5. Groove; 6. Arc-shaped convex platform; 7. Iron plate; 8. Iron pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Referring to Figures 1 - 3 , a test piece assembly device for a new nuclear grade welder examination, which comprises a circular iron 1. The surface of the circular iron has two arc-shaped convex platforms 6. The two arc-shaped convex platforms divide the surface of the circular iron into two parts: platform 1 2 and platform 2 3. There is a through-long groove 5 between the two arc-shaped convex platforms on the upper surface of the circular iron. The middle of platform 2 has a circular through hole 4. Before using this device, place the assembly device iron plate 7 above platform 1. The edge of the through hole in the middle of the assembly device iron plate is attached to the outer diameter edge of the arc-shaped convex platform to be attached. Place the assembly device iron pipe 8 on platform 2. The outer wall of the assembly device iron pipe is attached to the inner edge of the arc-shaped convex platform. Use spot welding to weld the connection between the iron plate and the iron pipe.

[0020] Platform 2 is 0.5 mm higher than platform 1.

[0021] Working principle:

[0022] Place this device on a horizontal ground. Place the iron plate horizontally above Platform 1 of the device, and make the edge of the hole wall of the iron plate 7 fit with the outer edge of the arc-shaped convex platform on the platform of this device. Place the iron pipe 8 on Platform 2 of this device, and make the outer wall of the iron pipe fit with the inner edge of the arc-shaped convex platform. After the installation is completed, spot weld the iron pipe and the iron plate at the vacancy between the two arc-shaped convex platforms of this device. Since Platform 2 is 0.5 mm higher than Platform 1, it can play a role in reverse deformation. After the spot welding is completed, the welding work of the iron pipe and the iron plate is completed, that is, the assembly of the specimen is completed.

Claims

1. A new type of test piece assembly device for nuclear grade welder examination, which comprises round iron and is characterized by: The circular iron surface has two sections of arc-shaped bosses, which divide the circular iron surface into platform one and platform two. There is a through-length groove between the two sections of the arc-shaped bosses on the upper surface of the circular iron, and a through hole is provided in the middle of platform two. An assembly device iron plate is placed on platform one, and the edge of the iron plate hole wall fits the outer diameter edge of the arc-shaped boss. An assembly device iron pipe is placed on platform two, and the outer wall of the iron pipe fits the inner edge of the arc-shaped boss. Spot welding is used to weld the joints between the iron plate and the iron pipe.

2. The novel test piece assembly device for nuclear grade welder examination according to claim 1 is characterized by: The through hole is a circular through hole.

3. A new type of test piece assembly device for nuclear grade welder examination according to claim 1 or 2, characterized in that: The platform 2 is 0.5 mm higher than the platform 1.

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