Detachable argon chamber device

Abstract

The utility model belongs to an argon chamber, and particularly relates to a detachable argon chamber device. The detachable argon chamber device comprises an annular argon chamber cover, and a support and gas conveying device is arranged in the center of the argon chamber cover. The device has the remarkable effects that the device is very convenient to mount, can be firmly fixed in the pipeline by adjusting the tightness of the bolt of the supporting assembly after being spliced, and is high-temperature-resistant and not easy to fall off.

Description

Technical Field

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

[0002] The main coolant pipeline of nuclear power reactor is made of stainless steel, and the back side is filled with argon for protection during welding. Due to the large inner diameter of the pipeline (inner diameter ≥ 700mm), the traditional whole pipe argon filling method has the disadvantages of poor protection effect and excessive use of inert gas.

[0003] Specifically, nuclear power projects in the past 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 molten 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 molten pool tends to decrease, that is, the total investment is inversely proportional to the expected product effect. Utility Model Content

[0004] The invention aims at the defects of the prior art and provides a detachable argon chamber device.

[0005] The invention is realized in the following way: a disassembled argon chamber device comprises an annular argon chamber cover, and a support and gas conveying device is arranged at the center of the argon chamber cover.

[0006] A detachable argon chamber device as described above, wherein the support and gas delivery device includes a central plate arranged in the center, a one-inlet and three-outlet gas distribution box is arranged on the central plate, the one-inlet and three-outlet gas distribution box is provided with a support rod, the support rod is connected to the central plate and the argon chamber cover and plays a supporting role, and the one-inlet and three-outlet gas distribution box is provided with a conduit, which is connected to the argon chamber cover.

[0007] In the above-mentioned detachable argon chamber device, the argon chamber cover is composed of a plurality of arc-shaped parts with the same shape.

[0008] In the detachable argon chamber device as described above, the argon chamber cover has three arc-shaped parts in total.

[0009] In the detachable argon chamber device as described above, the number of support rods and conduits is the same as the number of arc-shaped components, each arc-shaped component is connected to one support rod, and each arc-shaped component is connected to one conduit.

[0010] In the above-mentioned detachable argon chamber device, the one-inlet-three-outlet gas distribution box is provided with a trachea joint, and the trachea joint is connected with the catheter through the internal airway of the one-inlet-three-outlet gas distribution box.

[0011] In the above-mentioned detachable argon chamber device, the support rod is connected to the one-inlet and three-outlet gas distribution box through a guide sleeve.

[0012] In the above-mentioned detachable argon chamber device, the guide sleeve is fixed to the one-inlet and three-outlet gas distribution box by means of a hexagonal nut.

[0013] The remarkable effect of the new device is that the device is very convenient to install, and after the splicing is completed, it can be firmly fixed inside the pipeline by tightening the adjusting bolts of the support assembly, and it is resistant to high temperature and is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural diagram of a detachable argon chamber device.

[0015] In the figure: 1. Argon chamber cover, 2. Air pipe joint, 3. Support rod, 4. One-inlet and three-outlet gas distribution box, 5. Guide sleeve, 6. Hexagonal nut, 7. Center plate. DETAILED DESCRIPTION

[0016] A detachable argon chamber device includes an argon chamber cover 1, which is the main structure of the detachable argon chamber. It is cut and blanked using stainless steel plates and connected using welding technology. Three sections of argon chamber covers with the same shape and size constitute the detachable argon chamber cover as a whole. Multiple detachable argon chamber covers of the same model are interchangeable. The air pipe joint 2 and the connecting conduit are the circulation channels for the inert gas. The inert gas is dispersed and filled to the roots of welds at different positions through the one-inlet and three-outlet gas distribution box 4, thereby improving the effect of back protection of the weld. The support rod 3, the guide sleeve 5 and the hexagonal nut 6 are the supporting components. The argon chamber cover is tightly connected to the inner wall of the pipeline through the threaded connection between the nut and the screw, avoiding the risk of the detachable argon chamber cover falling off due to the welding position, thereby improving the quality of weld root protection.

[0017] The internal use effect of this application device:

[0018] (1) Taipingling Nuclear Island Installation

[0019] In the Taipingling Phase I Nuclear Island Installation Project of China Nuclear Industry 23 Construction Co., Ltd., the EM2 team produced the reactor coolant main pipeline welding process assessment parts and used this device to perform argon filling protection on the back of the weld. For details, see Figure 1 The installation and disassembly process is very convenient, the installation time is about 3 minutes, and the disassembly time is about 1 minute. No falling off occurs during the entire welding process.

[0020] (2) Theoretical calculation of the argon chamber cover of CGN Hualong One

[0021] 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: (3802 -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 disassembled argon chamber device, characterized in that: It comprises a circular annular argon chamber cover (1), and a support and gas conveying device is arranged at the center of the argon chamber cover (1); The support and gas delivery device comprises a central plate (7) arranged at the center, a one-inlet and three-outlet gas distribution box (4) is arranged on the central plate (7), a support rod (3) is arranged on the one-inlet and three-outlet gas distribution box (4), the support rod (3) is connected to both the central plate and the argon gas chamber cover (1) and plays a supporting role, and a conduit is arranged on the one-inlet and three-outlet gas distribution box (4), and the conduit is connected to the argon gas chamber cover (1); The argon chamber cover (1) is composed of a plurality of arc-shaped parts with the same shape; The argon chamber cover (1) has three arc-shaped parts in total; The number of the support rods (3) and the conduits is the same as the number of the arc-shaped components, each arc-shaped component is connected to one support rod (3), and each arc-shaped component is connected to one conduit; The one-inlet-three-outlet gas distribution box (4) is provided with a trachea joint (2), and the trachea joint (2) is connected to the catheter through the internal airway of the one-inlet-three-outlet gas distribution box (4); The support rod (3) is connected to the one-inlet-three-outlet gas distribution box (4) through a guide sleeve (5); The guide sleeve (5) is fixed to the one-inlet-three-outlet gas distribution box (4) via a hexagonal nut (6).

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