Seamless pipe fitting for high-temperature sodium pipeline of nuclear power station

Abstract

A seamless pipe fitting for a high-temperature sodium pipeline of a nuclear power station comprises a first seamless pipe body used for use and further comprises a connecting assembly and a second seamless pipe body, and the second seamless pipe body is installed at one end of the first seamless pipe body through the connecting assembly; the connecting assembly comprises a first connecting flange, an annular air bag, an inflation pipe, a sealing cover and an embedding groove, the first connecting flange is arranged at one end of the first seamless pipe body, the second connecting flange is arranged at one end of the second seamless pipe body, and the first connecting flange and the second connecting flange are fixed through a screw rod; the connecting structure is novel in structure and ingenious in conception, the first seamless pipe body and the second seamless pipe body can be conveniently fixed, the sealing performance is good after connection, repairing can be conducted after the sealing performance is reduced, and the connecting structure is convenient to use, high in practicability and suitable for popularization and application. The use is facilitated.

Description

Technical Field

[0001] The utility model relates to a seamless pipe fitting, in particular to a seamless pipe fitting for a high-temperature sodium pipeline in a nuclear power station. Background Art

[0002] Generally, seamless pipes are made of high-quality carbon steels such as 10, 20, 30, 35, 45, low-alloy structural steels such as 16Mn, 5MnV, or alloy steels such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc., which are hot-rolled or cold-rolled. Seamless pipes made of low-carbon steels such as 10 and 20 are mainly used for fluid delivery pipelines. Seamless pipes made of medium-carbon steels such as 45 and 40Cr are used to manufacture mechanical parts, such as the load-bearing parts of automobiles and tractors.

[0003] Generally, seamless pipes must be tested for strength and flattening. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated states; cold-rolled steel pipes are delivered in hot-rolled or heat-treated states. Seamless pipes for low- and medium-pressure boilers: used to manufacture various low- and medium-pressure boilers, superheated steam pipes, boiling water pipes, water-cooled wall pipes, and superheated steam pipes, large smoke pipes, small smoke pipes, and arched brick pipes for locomotive boilers.

[0004] When using high-temperature sodium pipelines in nuclear power plants, seamless pipe fittings are required. The sealing performance of existing seamless pipe fittings when used to connect high-temperature sodium pipelines in nuclear power plants needs to be improved. After being used for a long time, the sealing performance will decrease and need to be disassembled and replaced, which is not conducive to use. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a seamless pipe fitting for high-temperature sodium pipelines in nuclear power plants, which effectively solves the problem that the sealing performance of existing seamless pipe fittings needs to be improved when used in connection with high-temperature sodium pipelines in nuclear power plants, and the sealing performance will decrease after a long period of use, and needs to be disassembled and replaced, which is not conducive to use.

[0006] To achieve the above object, the utility model provides the following technical solution: the utility model includes a first seamless pipe body for use, and also includes a connecting assembly and a second seamless pipe body, wherein one end of the first seamless pipe body is mounted with the second seamless pipe body through the connecting assembly;

[0007] The connecting assembly includes a first connecting flange, a second connecting flange, a screw, a through hole, a first sealing groove, a sealing ring, a second sealing groove, an annular airbag, an inflation tube, a sealing cover and an embedded groove. The first connecting flange is arranged at one end of the first seamless tube body, and the second connecting flange is arranged at one end of the second seamless tube body. The first connecting flange and the second connecting flange are fixed by screws. A first sealing groove is provided on the outer side of the middle part of the first connecting flange and the second connecting flange, and a sealing ring is placed inside the first sealing groove. Second sealing grooves are provided on the first connecting flange and the second connecting flange outside the first sealing groove, and an annular airbag is placed inside the second sealing groove. An inflation tube embedded in the first connecting flange and the second connecting flange is provided on one side of the annular airbag.

[0008] Preferably, through holes are provided at positions of the first connecting flange and the second connecting flange corresponding to the screws.

[0009] Preferably, the cross-section of the first sealing groove is a rectangular groove.

[0010] Preferably, the cross section of the second sealing groove is a circular groove.

[0011] Preferably, a sealing cap is screwed onto one end of the inflation tube.

[0012] Preferably, embedding grooves are provided at positions of the first connecting flange and the second connecting flange corresponding to the inflation pipe.

[0013] Beneficial effect: When the utility model is used, when the first seamless tube body is connected with the second seamless tube body, the sealing ring is placed in the first sealing groove of the first connecting flange and the second connecting flange, and then the annular airbag is placed inside the second sealing groove, and the inflation tube is placed in the embedding groove of the first connecting flange and the second connecting flange, and then the first connecting flange and the second connecting flange are fixed by a screw, so that the fixed connection of the first connecting flange and the second connecting flange, that is, the connection of the first seamless tube body and the second seamless tube body, can be completed. In this way, the annular airbag is inflated by the set inflation tube so that the annular airbag fills the second sealing groove. In this way, the first connecting flange and the second connecting flange are sealed by the set sealing ring, and the set annular airbag is sealed for the second time to ensure the connection sealing performance. At the same time, when the sealing performance at the annular airbag decreases, it can be supplemented and inflated by the inflation tube, which is convenient for use. The utility model has a novel structure and an ingenious conception, is convenient for fixing the first seamless tube body and the second seamless tube body, and has good sealing performance after connection, and can be repaired after the sealing performance decreases, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is a side view of the second connecting flange of the utility model;

[0018] Numbers in the figure: 1. first seamless tube body; 2. connecting assembly; 3. second seamless tube body; 4. first connecting flange; 5. second connecting flange; 6. screw; 7. through hole; 8. first sealing groove; 9. sealing ring; 10. second sealing groove; 11. annular airbag; 12. inflation tube; 13. sealing cover; 14. embedded groove. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-3 The specific implementation modes of the present utility model are further described in detail.

[0020] Embodiment 1, by Figure 1-3 The utility model provides a seamless pipe fitting for a high-temperature sodium pipeline in a nuclear power plant, comprising a first seamless pipe body 1 for use, and also comprising a connecting assembly 2, a second seamless pipe body 3, a first connecting flange 4, a second connecting flange 5, a screw 6, a through hole 7, a first sealing groove 8, a sealing ring 9, a second sealing groove 10, an annular airbag 11, an inflatable tube 12, a sealing cover 13 and an embedded groove 14, one end of the first seamless pipe body 1 is installed with the second seamless pipe body 3 through the connecting assembly 2;

[0021] The connecting assembly 2 includes a first connecting flange 4, a second connecting flange 5, a screw 6, a through hole 7, a first sealing groove 8, a sealing ring 9, a second sealing groove 10, an annular airbag 11, an inflation tube 12, a sealing cover 13 and an embedded groove 14. The first connecting flange 4 is arranged at one end of the first seamless tube body 1, and the second connecting flange 5 is arranged at one end of the second seamless tube body 3. The first connecting flange 4 and the second connecting flange 5 are fixed by a screw 6. A first sealing groove 8 is opened on the outer side of the middle part of the first connecting flange 4 and the second connecting flange 5, and a sealing ring 9 is placed inside the first sealing groove 8. A second sealing groove 10 is opened on the first connecting flange 4 and the second connecting flange 5 outside the first sealing groove 8, and an annular airbag 11 is placed inside the second sealing groove 10. An inflation tube 12 embedded in the first connecting flange 4 and the second connecting flange 5 is arranged on one side of the annular airbag 11.

[0022] Specific use: When the utility model is used, when the first seamless tube body 1 is connected to the second seamless tube body 3, the sealing ring 9 is placed in the first sealing groove 8 of the first connecting flange 4 and the second connecting flange 5, and then the annular airbag 11 is placed inside the second sealing groove 10, and the inflation tube 12 is placed in the embedding groove 14 of the first connecting flange 4 and the second connecting flange 5, and then the first connecting flange 4 and the second connecting flange 5 are fixed by the screw 6, so that the fixed connection between the first connecting flange 4 and the second connecting flange 5 can be completed, that is, the connection between the first seamless tube body 1 and the second seamless tube body 3, so that the annular airbag 11 is inflated by the set inflation tube 12, so that the annular airbag 11 fills the second sealing groove 10, so that the first connecting flange 4 and the second connecting flange 5 are sealed for the first layer by the set sealing ring 9, and the set annular airbag 11 is sealed for the second time to ensure the connection sealing performance, and at the same time, when the sealing performance at the annular airbag 11 decreases, it can also be supplemented and inflated by the inflation tube 12, which is convenient for use.

[0023] Beneficial effects: The utility model has a novel structure and an ingenious design, and is convenient for fixing the first seamless tube body 1 and the second seamless tube body 3. The sealing performance is good after connection, and the utility model can be repaired after the sealing performance is reduced, which is convenient for use.

[0024] Embodiment 2

[0025] In the first embodiment, the first connecting flange 4 and the second connecting flange 5 are inconvenient to fix. Figure 1 As another preferred embodiment, the difference from the first embodiment is that through holes 7 are provided at the positions of the first connecting flange 4 and the second connecting flange 5 corresponding to the screw 6 to facilitate the fixing of the first connecting flange 4 and the second connecting flange 5.

[0026] Embodiment 3

[0027] The first sealing groove 8 in the first embodiment is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that the cross section of the first sealing groove 8 is a rectangular groove, which is convenient for the placement and use of the sealing ring 9.

[0028] Embodiment 4

[0029] The second sealing groove 10 in the first embodiment is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that the cross section of the second sealing groove 10 is a circular groove, so that the annular airbag 11 can be well fitted with the second sealing groove 10 to ensure the sealing performance.

[0030] Embodiment 5

[0031] In the first embodiment, the inflatable tube 12 is inconvenient to use. Figure 1As another preferred embodiment, the difference from the first embodiment is that a sealing cover 13 is screwed onto one end of the inflation tube 12 to facilitate the sealing of the inflation tube 12 .

[0032] Embodiment 6

[0033] In the first embodiment, the trachea 12 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that an embedding groove 14 is provided at the position of the first connecting flange 4 and the second connecting flange 5 corresponding to the inflation pipe 12 to facilitate the installation and use of the air pipe 12.

[0034] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A seamless pipe fitting for a high-temperature sodium pipeline in a nuclear power plant, comprising a first seamless pipe body (1) for use, characterized in that: It also comprises a connecting assembly (2) and a second seamless pipe body (3), wherein one end of the first seamless pipe body (1) is mounted with the second seamless pipe body (3) via the connecting assembly (2); The connection assembly (2) comprises a first connection flange (4), a second connection flange (5), a screw (6), a through hole (7), a first sealing groove (8), a sealing ring (9), a second sealing groove (10), an annular airbag (11), an inflation tube (12), a sealing cover (13) and an embedding groove (14); the first connection flange (4) is arranged at one end of the first seamless tube body (1), the second connection flange (5) is arranged at one end of the second seamless tube body (3), and the first connection flange (4) and the second connection flange (5) are connected by the screw (6). The first connecting flange (4) and the second connecting flange (5) are fixed with each other, a first sealing groove (8) is provided on the outer side of the middle part of the first connecting flange (4) and the second connecting flange (5), a sealing ring (9) is placed inside the first sealing groove (8), a second sealing groove (10) is provided on the first connecting flange (4) and the second connecting flange (5) outside the first sealing groove (8), an annular air bag (11) is placed inside the second sealing groove (10), and an inflation pipe (12) embedded in the first connecting flange (4) and the second connecting flange (5) is provided on one side of the annular air bag (11).

2. A seamless pipe fitting for high-temperature sodium pipeline in a nuclear power plant according to claim 1, characterized in that: Through holes (7) are provided on the first connecting flange (4) and the second connecting flange (5) at positions corresponding to the screw rod (6).

3. A seamless pipe fitting for high-temperature sodium pipeline in a nuclear power plant according to claim 1, characterized in that: The cross section of the first sealing groove (8) is a rectangular groove.

4. A seamless pipe fitting for high-temperature sodium pipeline in a nuclear power plant according to claim 1, characterized in that: The cross section of the second sealing groove (10) is a circular groove.

5. The seamless pipe fitting for high-temperature sodium pipeline in nuclear power plant according to claim 1, characterized in that: One end of the inflation tube (12) is screwed with a sealing cover (13).

6. A seamless pipe fitting for high temperature sodium pipeline in nuclear power plant according to claim 1, characterized in that: The first connecting flange (4) and the second connecting flange (5) are provided with embedding grooves (14) at positions corresponding to the inflation pipe (12).

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