Structure for reducing deformation of gas tank of looped network gas-insulated switchgear in laser welding test

Abstract

The utility model discloses a structure for reducing deformation of a gas tank of a ring network gas-insulated switchgear in a laser welding test, which is characterized by comprising a ring network cabinet body, and cabinet body plates of the ring network cabinet body are welded in a manner of argon arc welding assembly and laser welding integral forming, and then are welded into a whole. Mounting square steel is welded at the opening of the cabinet body plate in an argon arc welding manner, and a hoisting plate is welded at the upper end of the cabinet body plate in an argon arc welding manner; a rear sealing plate is welded between the lower end of the mounting square steel and the cabinet body, and an observation window structure is arranged above the rear sealing plate; a sealing structure is arranged between the periphery of the observation window structure and the inner wall of the mounting square steel; and a rear sealing cover plate covers the mounting square steel and is in contact sealing with the sealing structure. According to the structure for reducing the deformation of the gas tank of the looped network gas-insulated switchgear in the laser welding test, through structural improvement, the deformation after laser welding is reduced, and the gas tightness of the gas tank of the looped network gas-insulated switchgear in the test is ensured.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, specifically to a structure for reducing the deformation of the gas box in a laser welding test ring network gas cabinet. Background Technology

[0002] Ring main unit (RMU) gas-insulated switchgear is a new generation of fully enclosed stainless steel gas-insulated switchgear manufactured using advanced welding, gas filling, and leak detection technologies. This switchgear is a completely closed system; all its live components and switches are enclosed within a stainless steel housing. It features a modular design, allowing for independent single-gas-box structures or modular combinations. High-performance, high-quality, and economical RMU gas-insulated switchgear is in increasing demand in China. Each year, the company develops new RMU gas-insulated switchgear based on market demand and competitive needs, finalizing the product design through the manufacturing, debugging, and testing of experimental RMU gas-insulated switchgear.

[0003] When testing the mechanical and electrical performance of the test ring network gas-filled switchgear, an observation window is opened on the rear sealing plate to facilitate monitoring of all live components and switch operation status enclosed in the stainless steel gas box and to facilitate the replacement of parts.

[0004] To ensure unobstructed observation, the viewing window was opened to its maximum size. This caused the rear sealing plate of the test ring network gas chamber to deform in a wavy manner after laser welding, with the deformation exceeding the compression of the sealing strip. This resulted in the test ring network gas chamber losing its airtightness. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, the purpose of this utility model is to provide a structure that reduces the deformation of the gas chamber in a laser welding test ring network gas holder. This utility model, through structural improvements, reduces deformation after laser welding, thus ensuring the airtightness of the test ring network gas holder's gas chamber.

[0006] To achieve the objective of this utility model, the technical solution adopted is as follows:

[0007] A structure for reducing deformation of the gas box in a laser welding test ring network gas holder includes:

[0008] The cabinet body of the ring network cabinet is formed by first argon arc welding and then laser welding. After the cabinet body is welded, the cabinet body is argon arc welded at the opening of the cabinet body and the hanging plate is argon arc welded at the upper end of the cabinet body.

[0009] A rear sealing plate is welded between the lower end of the mounting square steel and the cabinet body, and an observation window structure is provided above the rear sealing plate;

[0010] A sealing structure is provided around the perimeter of the observation window structure and between the inner wall of the mounting square steel;

[0011] A rear cover plate is placed on the mounting square steel and contacts the sealing structure for sealing.

[0012] In a preferred embodiment of this utility model, the mounting square steel includes a first mounting square steel bar welded to the reinforcing rib of the rear end plate, a second mounting square steel bar welded to the left rear end plate, a third mounting square steel bar welded above the lower reinforcing rib of the rear end plate, and a fourth mounting square steel bar welded to the right rear end plate.

[0013] In a preferred embodiment of this utility model, the sealing structure is a sealing ring.

[0014] In a preferred embodiment of this utility model, a sealing ring contact groove is provided on the mounting square steel to contact the sealing structure.

[0015] In a preferred embodiment of this utility model, the sealing ring contact groove is a T-shaped groove.

[0016] In a preferred embodiment of this utility model, both the rear sealing plate and the rear cover plate are provided with observation holes.

[0017] The beneficial effects of this utility model are as follows:

[0018] The structure of this utility model for reducing deformation of the gas box in a laser welding test ring network gas cabinet is improved through structural modifications, thereby reducing deformation after laser welding and ensuring the airtightness of the gas box in the test ring network gas cabinet. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ,

[0022] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 4 . Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, in the following descriptions, well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the invention.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In existing technologies, the welded product is located at L on both sides of the back sealing plate (e.g., Figure 2 The narrow edge (marked) underwent wavy deformation, with the height of the deformation exceeding the compression of the sealing strip. This caused the air box to lose its airtightness.

[0026] Therefore, this utility model has been improved, such as Figure 1-4 The structure shown is for reducing the deformation of the gas box of a laser welding test ring network gas-filled cabinet. It includes a ring network cabinet body 100. The cabinet body 100 is assembled by argon arc welding and then laser welding to form an integral shape. After the cabinet body 100 is welded, a square steel 40 is argon arc welded at the opening of the cabinet body 100 and a lifting plate 60 is argon arc welded at the upper end of the cabinet body 100.

[0027] The rear sealing plate 30 is welded to the position between the mounting square steel 40 and the ring main unit 100. An observation window structure 70 is provided above the rear sealing plate 30. A sealing structure 20 is provided around the observation window structure 70 and between the inner wall of the mounting square steel 40.

[0028] Key points combined Figure 3 The rear cover plate 10 covers the mounting square steel 40 and contacts the sealing structure 20 for sealing. The sealing structure 20 is a sealing ring.

[0029] The mounting square steel 40 has a sealing ring contact groove 44 that contacts the sealing structure 20. The sealing ring contact groove 44 is a T-shaped groove.

[0030] The mounting square steel 40 includes a first mounting square steel strip 41 welded to the reinforcing rib 31 on the rear end plate, a second mounting square steel strip 42 welded to the left rear end plate 30, a third mounting square steel strip 43 welded above the lower reinforcing rib 32 on the rear end plate 30, and a fourth mounting square steel strip 44 welded to the right rear end plate 30. Both the rear end plate 30 and the rear cover plate 10 are provided with observation holes 33 or 12.

[0031] To control the deformation of the rear sealing plate after laser welding, the thermal conductivity area of ​​the rear sealing plate was increased, and its processing technology and structure were modified. A micro-connection was used to retain the observation window on the rear sealing plate. Figure 4At point A, the laser weld was removed after the area returned to room temperature. This method proved effective, effectively controlling deformation after welding the back sealing plate and ensuring the airtightness of the gas box.

[0032] The foregoing has shown and described the basic principles and main features of the invention and the advantages of the invention.

[0033] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A structure for reducing deformation of the gas box in a laser welding test ring network gas holder, characterized in that, include: The cabinet body of the ring network cabinet is formed by first argon arc welding and then laser welding. After the cabinet body is welded, the cabinet body is argon arc welded at the opening of the cabinet body and the hanging plate is argon arc welded at the upper end of the cabinet body. A rear sealing plate is welded between the lower end of the mounting square steel and the cabinet body, and an observation window structure is provided above the rear sealing plate; A sealing structure is provided around the perimeter of the observation window structure and between the inner wall of the mounting square steel; A rear cover plate is placed on the mounting square steel and contacts the sealing structure for sealing.

2. The structure for reducing deformation of the gas box in a laser welding test ring network gas holder as described in claim 1, characterized in that, The mounting square steel includes a first mounting square steel bar welded to the reinforcing rib on the rear end plate, a second mounting square steel bar welded to the left rear end plate, a third mounting square steel bar welded above the lower reinforcing rib on the rear end plate, and a fourth mounting square steel bar welded to the right rear end plate.

3. The structure for reducing deformation of the gas box in a laser welding test ring network gas holder as described in claim 1, characterized in that, The sealing structure is a sealing ring.

4. The structure for reducing deformation of the gas box in a laser welding test ring network gas holder as described in claim 1, characterized in that, The mounting square steel has a sealing ring contact groove that contacts the sealing structure.

5. The structure for reducing deformation of the gas box in a laser welding test ring network gas holder as described in claim 4, characterized in that, The sealing ring contact groove is a T-shaped groove.

6. The structure for reducing deformation of the gas box in a laser welding test ring network gas holder as described in claim 1, characterized in that, Both the rear sealing plate and the rear cover plate are provided with observation holes.

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