Connecting pipe sealing device for nitrogen charging of safety injection tank

Abstract

The utility model provides a connecting pipe sealing device structure for nitrogen charging of a safety injection box, which comprises a hoop component fixed on the periphery of a pipeline and a sealing cover component used for sealing a pipeline opening, the hoop component is fixed with the sealing cover component, and an air inlet and outlet hole used for being externally connected with a valve to charge and discharge air is arranged in the sealing cover component in a penetrating manner. Belongs to the technical field of equipment nitrogen filling sealing. The connecting pipe sealing device for nitrogen charging of the safety injection tank is used. And the equipment can be transported to the site without cutting and polishing the connecting pipe, so that the site process can be simplified, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a pipe sealing device for nitrogen filling of a nitrogen injection tank, belonging to the field of equipment nitrogen filling sealing technology. Background Technology

[0002] The safety injection tank is a low-alloy steel spherical container used in the containment of nuclear power plants. In the event of a coolant loss accident, the safety injection tank injects boron water into the reactor containment vessel at a high flow rate and velocity.

[0003] During the manufacturing stage, all pipe openings of the safety injection box are in the form of pipe connections, and nitrogen filling and sealing are required during equipment transportation and storage.

[0004] For these types of flangeless pipe openings, nitrogen sealing typically involves leaving a certain amount of clearance in the pipe fitting and sealing the opening with a welded blind cap. After the equipment is transported to the site, the blind cap is cut and removed, the beveling is processed, and then the equipment is installed in place.

[0005] Therefore, there is an urgent need in the field for a pipe sealing device structure for nitrogen filling of the injection tank. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of complex on-site procedures when filling the nitrogen injection box in the prior art.

[0007] To address the aforementioned problems, the present invention provides a sealing device structure for a pipe fitting used for nitrogen filling in a nitrogen injection tank. This structure includes a clamp assembly fixed to the outer periphery of the pipeline and a sealing cap assembly for sealing the pipeline opening. The clamp assembly and the sealing cap assembly are fixed together, and the sealing cap assembly has an inlet / outlet port for connecting an external valve to perform filling and releasing.

[0008] Preferably, a gasket is provided between the sealing cap assembly and the clamp assembly.

[0009] Preferably, the sealing cap assembly includes a sealing part and a cap body. The diameter of the sealing part is smaller than the inner diameter of the nitrogen filling pipe. The sealing part adopts a double sealing groove structure, and an O-ring is provided inside the double sealing groove structure.

[0010] Preferably, the diameter of the cover is larger than the outer diameter of the connecting pipe, which facilitates the disassembly and assembly of the sealing cover assembly.

[0011] Preferably, the edge of the cover is provided with 2 to 4 evenly distributed through holes, and each through hole is provided with a set of bolts to be connected and fixed to the clamp assembly.

[0012] Preferably, the clamp assembly consists of two semi-circular clamps connected to each other by bolts.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Once the equipment is transported to the site, there is no need for cutting and grinding of the connecting pipes, which simplifies the on-site procedures and improves work efficiency. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the pipe sealing device structure for nitrogen filling of the injection tank according to the present invention;

[0016] Figure 2 This is a cross-sectional view of the sealing cap assembly;

[0017] Figure 3 This is a top view of the clamp assembly.

[0018] Reference numerals: 1. Sealing cap assembly; 2. Clamp assembly; 3. Double sealing groove; 4. Air inlet / outlet. Detailed Implementation

[0019] To make this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings:

[0020] like Figure 1-3 As shown, this utility model provides a pipe sealing device structure for nitrogen filling of a safety injection tank, including a clamp assembly 2 fixed to the outer periphery of the pipeline and a sealing cover assembly 1 for sealing the pipeline opening. The clamp assembly 2 and the sealing cover assembly 1 are fixed together, and the sealing cover assembly 1 has an inlet and outlet hole 4 for connecting an external valve for filling and releasing gas.

[0021] Example

[0022] This utility model provides a sealing device structure for a pipe fitting for nitrogen filling in a nitrogen injection tank. In actual use, the clamp assembly 2 is first fixed to the outer wall of the pipe fitting with bolts. Then, the sealing cover assembly 1 is aligned with the inner wall of the pipe fitting and slowly pushed in. The bolts between the clamp assembly 2 and the sealing cover assembly 1 are then tightened to slowly install the sealing cover assembly 1 into the pipe fitting. After it is installed in place, the sealing cover assembly is pressed against the bevel of the pipe fitting by the gasket and the double sealing groove 3 to protect the bevel. Gas is then filled and released through the air inlet and outlet holes 4.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A sealing device for a nozzle used in nitrogen filling a nitrogen injection tank, characterized in that, It includes a clamp assembly fixed to the outer periphery of the pipeline and a sealing cap assembly for sealing the pipeline opening. The clamp assembly and the sealing cap assembly are fixed together. The sealing cap assembly has an inlet and outlet port for external valves to charge and release air.

2. The sealing device for the nozzle used for nitrogen filling of the injection tank as described in claim 1, characterized in that, A gasket is provided between the sealing cover assembly and the clamp assembly.

3. The sealing device for the pipe fitting in a nitrogen filling tank as described in claim 1, characterized in that, The sealing cap assembly includes a sealing part and a cap body. The diameter of the sealing part is smaller than the inner diameter of the pipe opening. The sealing part adopts a double sealing groove structure, and an O-ring is provided inside the double sealing groove structure.

4. The sealing device for the nozzle used for nitrogen filling of the injection tank as described in claim 3, characterized in that, The diameter of the cover is larger than the outer diameter of the connecting pipe, which facilitates the disassembly and assembly of the sealing cover assembly.

5. The sealing device for the nozzle used for nitrogen filling of the injection tank as described in claim 3, characterized in that, The cover has 2 to 4 evenly distributed through holes on its edge, and each through hole is fitted with a set of bolts to connect and fix it to the clamp assembly.

6. The sealing device for the nozzle used for nitrogen filling of the injection tank as described in claim 1, characterized in that, The clamp assembly consists of two semi-circular clamps connected to each other by bolts.

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