Folding argon chamber device

Abstract

The utility model belongs to an argon chamber, and particularly relates to a folding argon chamber device. According to the folding type argon chamber device, a folded argon chamber cover and an inflected argon chamber cover form a circular ring together, an air inlet device is arranged in the middle of the circular ring, and the air inlet device is communicated with the folded argon chamber cover and the inflected argon chamber cover. The device has the remarkable effects that the device is very convenient to mount and dismount, the three-section folding argon chamber cover can be firmly fixed in a pipeline by loosening and tightening the bolts on the supporting rods after being opened, and the stainless steel adhesive tape is matched for sealing, so that the protection effect on the back surface of a welding seam is improved.

Description

Technical Field

[0001] The invention belongs to an argon gas chamber, and in particular relates to a foldable argon gas chamber device. Background Art

[0002] When full penetration welding is used for stainless steel parts or the thickness of the parts does not exceed 4mm, the back of the weld needs to be protected by inert gas. Based on the stainless steel pipe that can be reached at the root of the weld (usually the inner diameter of the pipe needs to be greater than 500mm), the traditional whole pipe argon filling method has disadvantages such as poor protection effect and excessive use of inert gas. Utility Model Content

[0003] Aiming at the defects of the prior art, the invention provides a foldable argon chamber device.

[0004] The present invention is realized as follows: a foldable argon chamber device, wherein the folded argon chamber cover and the folded argon chamber cover together form a circular ring, an air intake device is arranged in the middle of the circular ring, and the air intake device is connected to the folded argon chamber cover and the folded argon chamber cover.

[0005] A foldable argon chamber device as described above, wherein the air intake device includes a one-inlet and three-outlet gas distribution box, the one-inlet and three-outlet gas distribution box is connected to three arms, and is respectively connected to the folded argon chamber cover and the folded argon chamber cover, and an air intake pipe is provided on the one-inlet and three-outlet gas distribution box.

[0006] A foldable argon chamber device as described above, wherein the arm is a support and an air pipe.

[0007] In the foldable argon chamber device as described above, the position where the support and the air pipe are connected to the folded argon chamber cover is the air inlet hole of the argon chamber cover.

[0008] In the foldable argon chamber device as described above, the folded-back argon chamber cover is hingedly connected to the folded-back argon chamber cover by a hinge.

[0009] In the foldable argon chamber device as described above, a hexagonal nut is arranged behind the gas inlet hole of the argon chamber cover.

[0010] In the foldable argon chamber device as described above, a sealing ring is provided at the gas inlet hole of the argon chamber cover.

[0011] The remarkable effect of the present invention is that the installation and disassembly process of the device is very convenient. The three-section foldable argon chamber cover can be opened and firmly fixed inside the pipeline by tightening and loosening the bolts on the support rod. The stainless steel adhesive tape is used for sealing to improve the protection effect of the back of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1:Structural diagram of a new type of foldable argon chamber device

[0013] In the figure: 1. Hexagonal nut, 2. Folded argon chamber cover, 3. One-inlet and three-outlet gas distribution box, 4. Hinge, 5. Folded back argon chamber cover, 6. Inlet pipe, 7. Support and air pipe, 8. Inlet hole of argon chamber cover. DETAILED DESCRIPTION

[0014] As attached Figure 1 As shown, a foldable argon chamber device, the folded argon chamber cover 2 and the folded back argon chamber cover 5 are the main structures of the argon chamber cover. The manufacturing process is to use a homemade mold to form the whole by bending, without welding and without welding deformation. The three sections of the argon chamber cover are connected by hinges, and the argon chamber cover can be efficiently completed by folding and folding back during the disassembly and assembly process. The main function of the support and air pipe 7 is to support the argon chamber cover and divert the gas in the one-inlet and three-outlet gas separator box 3, and to add a sealing gasket to seal the connection between the nut and the screw. There is no need to install an additional air pipe, which also eliminates the risk of the air pipe falling off the nozzle during use, causing quality defects.

[0015] The usage process of this application is as follows:

[0016] 1) Open the foldable argon chamber cover and place it on the back of the weld;

[0017] 2) Install the support assembly and adjust the bolts to secure it;

[0018] 3) Use stainless steel adhesive tape for sealing;

[0019] 4) Connect the air pipe to the one-inlet and three-outlet gas distribution box;

[0020] 5) Fill with inert gas for protection.

[0021] In the past, nuclear power projects used foam thermal resistance plates to make argon chambers, sealed both sides of the weld and filled the entire pipe with argon in the sealed space to achieve the effect of protecting the back of the welding pool. As the pipe diameter increases, the amount of inert gas used tends to increase gradually, but the protective effect on the back of the welding pool tends to decrease, that is, the total investment is inversely proportional to the expected product effect.

[0022] The whole material of this device is stainless steel, which can effectively avoid the contact between carbon steel and stainless steel to cause ferrite contamination. Due to the limited space in the pipeline, it is necessary to make an argon chamber device that can be quickly installed and disassembled by one person. The argon chamber cover is foldable, which can not only meet the needs of one person to complete the quick disassembly process, but also reduce the size of the device after folding, and reduce the risk of scratching the parent material when carrying it in and out of the pipeline.

[0023] Taking the specifications and dimensions of the coolant main pipeline of the CGN Hualong One reactor as an example, the inner diameter of the pipeline is 760mm, the width of the argon chamber cover groove of this device is 50mm, and the groove depth is 40mm. Under ideal conditions, the volume of gas that can be filled is: (380 2 -340 2 )*3.14*50=6123000mm 3 The traditional pipeline argon chamber is sealed with a foam thermal resistance board. Considering the thermal insulation effect, the distance between the foam thermal resistance board and the weld should be appropriately increased. The foam thermal resistance board is calculated to be 150mm away from the center of the weld. Under ideal conditions, the volume of gas that can be filled is: 380 2 *3.14*150*2=136024800mm 3 The volume of the filling gas is reduced to 4.5% of that of the traditional argon chamber, which greatly saves the use of inert gas. The reduction in volume helps to quickly complete the argon filling protection, which not only saves the total amount of inert gas used, but also improves the protection quality.

Claims

1. A foldable argon chamber device, characterized in that: The folded argon chamber cover (2) and the folded argon chamber cover (5) together form a ring shape, and an air intake device is arranged in the middle of the ring shape. The air intake device is connected to the folded argon chamber cover (2) and the folded argon chamber cover (5).

2. A foldable argon chamber device as claimed in claim 1, characterized in that: The air intake device comprises a one-inlet-three-outlet air distribution box (3), the one-inlet-three-outlet air distribution box (3) is connected to three arms, and is respectively connected to the folded argon chamber cover (2) and the folded argon chamber cover (5), and an air intake pipe (6) is provided on the one-inlet-three-outlet air distribution box (3).

3. A foldable argon chamber device as claimed in claim 2, characterized in that: The arms are supports and air pipes (7).

4. A foldable argon chamber device as claimed in claim 3, characterized in that: The position where the support and air pipe (7) are connected to the folded argon chamber cover (2) is the argon chamber cover air inlet hole (8).

5. A foldable argon chamber device as claimed in claim 4, characterized in that: The folded-back argon gas chamber cover (5) is hingedly connected to the folded-back argon gas chamber cover (2) via a hinge (4).

6. A foldable argon chamber device as claimed in claim 5, characterized in that: A hexagonal nut (1) is arranged behind the gas inlet hole (8) of the argon chamber cover.

7. A foldable argon chamber device as claimed in claim 6, characterized in that: A sealing ring is arranged at the gas inlet hole (8) of the argon chamber cover.

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