A fixture for a set of nuclear class welder examination test pieces

Abstract

The utility model discloses a kind of clamps for nuclear level welder examination test piece group, including clamp main body, the through hole is provided in the clamp main body, the through hole is from the top surface of clamp main body and penetrates to the bottom surface of clamp main body, the clamp main body top surface is provided with isolation ring, the isolation ring is arranged around through hole, the clamp main body is divided into two parts by the isolation ring, and is respectively outer area and inner area.The clamp is simple and convenient to use, can relatively fix pipe and plate, while ensuring that the gap after group point welding remains whole circle consistent, avoids deviation, eccentricity, ensures that group is successful once.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a fixture for assembling test pieces for nuclear-grade welder examinations. Background Technology

[0002] The "Detailed Rules for the Examination of Welding Operators of Special Equipment" issued by the State Administration for Quality Supervision, Inspection and Quarantine came into effect on February 1, 2011, necessitating a test piece assembly examination for welders. In the past, experience showed that during the assembly of tube sheet test pieces without the aid of tools, the weld seam often shifted or became eccentric after the weld seam shrank due to heat, resulting in inconsistent root gaps throughout the circumference. This necessitated a second assembly or forced welding, easily leading to uncontrollable welding quality and deviations in the weld seam dimensions, resulting in a low pass rate. Utility Model Content

[0003] This invention aims to solve the problem of cleaning foreign objects left inside pipelines. Therefore, one objective of this invention is to provide a fixture for assembling test specimens for nuclear-grade welder examinations. This fixture is suitable for the rapid and accurate assembly of tube sheet specimens without deformation, thereby improving assembly quality and efficiency.

[0004] To achieve the above objectives, this utility model proposes: A fixture for assembling test pieces for nuclear-grade welder examinations includes a fixture body with a through hole inside the fixture body extending from the top surface to the bottom surface of the fixture body. An isolation ring is provided on the top surface of the fixture body, surrounding the through hole and dividing the fixture body into two parts: an outer zone and an inner zone.

[0005] Preferably, the clamp body and the isolation ring are an integral structure.

[0006] Preferably, the fixture body is provided with a fan-shaped opening groove, which is connected to the through hole, and the central angle of the fan-shaped opening groove is 60°-80°.

[0007] The beneficial effects of this utility model are: This fixture is simple and convenient to use. It can fix the pipe and plate in a relative position, while ensuring that the gap remains consistent throughout the entire circle after the assembly and spot welding, avoiding offset and eccentricity, and ensuring successful assembly on the first attempt.

[0008] The features and advantages of this utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0009] Figure 1 This is a perspective view of the utility model; Figure 2 This is a top view of the present invention; Figure 3 This is the working state of this utility model. Figure 1 ; Figure 4 This is the working state of this utility model. Figure 2 .

[0010] In the figure: 1. Fixture body, 2. Through hole, 3. Isolation ring, 4. Outer area, 5. Inner area, 6. Fan-shaped opening slot, 7. Plate, 8. Tube. Detailed Implementation

[0011] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0012] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0013] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The words “a” or “one” and similar terms used in this application specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” includes two, equivalent to at least two. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0014] Please refer to Figure 1-2A fixture for assembling test pieces for nuclear-grade welder examinations includes a fixture body 1 with a diameter of 120 mm and a height of 10 mm. A through hole 2 with a diameter of 35 mm is provided inside the fixture body 1, extending from the top surface to the bottom surface of the fixture body 1. An isolation ring 3 is provided on the top surface of the fixture body 1, with an inner diameter of 60 mm, an outer diameter of 66.5 mm, and a height of 4 mm, i.e., a width of 3.25 mm. The isolation ring 3 is arranged around the through hole 2, dividing the fixture body 1 into two parts: an outer region 4 and an inner region 5.

[0015] The fixture body 1 and the isolation ring 3 are an integral structure made of metal, specifically iron.

[0016] The fixture body 1 is provided with a fan-shaped opening slot 6, which is connected to the through hole 2, so that the fixture body 1 is horseshoe-shaped and the central angle of the fan-shaped opening slot 6 is 70°.

[0017] The outer diameter of the isolation ring 3 is matched with the diameter of the hole in the plate 7, and the inner diameter of the isolation ring 3 is matched with the diameter of the tube 8.

[0018] The inner and outer diameters of the isolation ring 3, the diameter of the through hole 2, and other data can be adjusted according to the dimensions of the tube 8 and plate 7 to be assembled as needed.

[0019] This utility model is a fixture for assembling test pieces in nuclear-grade welder examinations. Its working principle is combined with the attached... Figure 3-4 illustrate: First, assemble plate 7 onto the fixture body 1, specifically onto the outer area 4 of the fixture body 1. (Refer to...) Figure 3 Then, the tube 8 is assembled onto the fixture body 1, specifically onto the inner area 5 of the fixture body 1, as shown in the reference. Figure 4 The tube 8 and plate 7 are fixed relative to each other, and then the tube 8 and plate 7 are welded together. This ensures that the gap after the assembly and spot welding is consistent throughout the whole circle, avoids offset and eccentricity, and ensures successful assembly in one go.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fixture for assembling test pieces for nuclear-grade welder examinations, characterized in that, The fixture includes a main body with a through hole inside, the through hole extending from the top surface of the fixture to the bottom surface of the fixture. An isolation ring is provided on the top surface of the fixture, the isolation ring is arranged around the through hole, and the isolation ring divides the fixture into two parts, namely an outer area and an inner area.

2. The fixture for assembling test pieces for nuclear-grade welder examinations according to claim 1, characterized in that, The clamp body and the isolation ring are an integral structure.

3. The fixture for assembling test pieces for nuclear-grade welder examinations according to claim 1, characterized in that, The fixture body is provided with a fan-shaped opening slot, which is connected to a through hole, and the central angle of the fan-shaped opening slot is 60°-80°.

Images