Welding assembly device for embedded filler neck of nuclear power pipeline

Abstract

A welding assembly device for an embedded filler neck of a nuclear power pipeline comprises a base arranged at the bottom and a jack installed at the top end of the base through a bolt, and further comprises a bearing table, a cap groove and an inserting hole, the bearing table is installed at the top end of the jack, and an upper supporting block is arranged at the top end of the bearing table; a plurality of inserting columns are arranged at the bottom end of the upper supporting block, first external threads are formed in the surfaces of the inserting columns, nuts are screwed to the bottom ends, located on the bearing table, of the inserting columns, and a crimping assembly is arranged on the upper supporting block; the pressing assembly comprises a pressing rod, a first through hole and a second through hole, the threaded cylinders are symmetrically fixed in the upper supporting block, the pressing rod is connected into the threaded cylinders in a screwed mode, and second external threads are formed in the surface of the pressing rod. And the nuclear power pipelines needing to be assembled can be conveniently fixed, stability is good, use is facilitated, and meanwhile carrying is convenient when the nuclear power pipelines are not used.

Description

Technical Field

[0001] The utility model relates to a welding assembly device, in particular to a welding assembly device for an embedded pipe nozzle of a nuclear power pipeline. Background Art

[0002] In order to ensure nuclear safety, nuclear power plants have very high requirements for various equipment. Generally, many pipe nozzles for measuring temperature and pressure are designed on the pipelines of nuclear power plants. The nuclear power main pipeline is the pipeline connecting the nuclear reactor and the steam generator. It belongs to nuclear safety level I equipment, so the quality requirements for welding are very high. Misalignment, weld nodules, root protrusions, concave and metal oxidation are not allowed. At the same time, the dimensional accuracy, position accuracy and form and position tolerance requirements of the pipe seat after welding are also very high, and even the overall roughness requirements of the inner surface of the final inner hole are also very high.

[0003] The embedded nozzle welding of the main pipeline of Hualong One nuclear power plant is to connect the small diameter nozzle to the large diameter pipeline of the main circuit. The saddle-shaped interface and irregular groove make it difficult to assemble. The hot section diameter of the Hualong One main pipeline is Φ939.4mm and the thickness is 76mm. The cold section main pipeline diameter is Φ836mm and the thickness is 69mm. The nozzle weighs about 70kg. The requirement after welding of the embedded nozzle is that the axis of the nozzle and the axis of the main pipeline should be vertical, with an angle tolerance of ±0.3°. After welding the nozzle, the root of the nozzle should be flush with the main pipeline, and no protrusions or depressions are allowed.

[0004] The existing welding assembly device of the embedded nozzle of the nuclear power pipeline cannot well fix the upper part of the assembled pipeline, and can only provide support and height adjustment, which is not practical enough. 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 welding assembly device for an embedded nozzle of a nuclear power pipeline, which effectively solves the problem that the existing welding assembly device for the embedded nozzle of a nuclear power pipeline cannot better fix the upper part of the assembled pipeline, can only provide support and height adjustment, and has insufficient applicability.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model includes a base arranged at the bottom and a jack installed at the top of the base by bolts, and also includes a bearing platform, an upper support block, a plug column, a first external thread, a nut, a cap groove and a socket, the top of the jack is installed with a bearing platform, the top of the bearing platform is provided with an upper support block, the bottom of the upper support block is provided with a plurality of plug columns, the surface of the plug column is provided with a first external thread, the plug column is located at the bottom of the bearing platform and is screwed with a nut, and a crimping assembly is provided on the upper support block;

[0007] The crimping assembly includes a pressure rod, a threaded barrel, a second external thread, a rotating handle, a limit plate, a pressure ear, a pressure ring, a first through hole and a second through hole. The threaded barrel is symmetrically fixed inside the upper support block, the pressure rod is screwed inside the threaded barrel, the second external thread is opened on the surface of the pressure rod, a rotating handle is provided at the top of the pressure rod, a limit plate is welded on the pressure rod below the rotating handle, a pressure ear is sleeved on the pressure rod at the bottom of the limit plate, and a pressure ring is fixed on the inner side of the pressure ear.

[0008] Preferably, a cap groove is provided at a position of the support platform corresponding to the nut.

[0009] Preferably, the support platform is provided with a plug hole at a position corresponding to the plug column.

[0010] Preferably, a first through hole is provided at a position of the pressure ear corresponding to the pressure rod.

[0011] Preferably, a second through hole is provided on the bearing platform at a position corresponding to the pressure rod.

[0012] Preferably, the threaded barrel is flush with the second through hole.

[0013] Beneficial effect: When the utility model is used and assembled, the plug post at the bottom end of the upper support block is inserted into the corresponding plug hole, and the upper nut is screwed on to fix it. The nuclear power pipeline that needs to be assembled is placed on the arc-shaped part of the upper support block. After the placement is completed, the nuclear power pipeline is aligned by lifting and lowering the jack. After alignment, the pressure ring is placed above the pipeline, and then the two pressure rods are passed through the first through holes of the pressure ear and screwed into the threaded barrel. The pressure rod is conveniently rotated by the provided rotating handle. In this way, the top of the nuclear power pipeline that needs to be assembled can be fixed, and the overall fixing stability is improved. When not in use, the nut is unscrewed, the upper support block is removed, and then the pressure rod is rotated by rotating the handle. The pressure rod is unscrewed from the threaded barrel, and the pressure rod and the pressure ring can be removed, which is convenient for carrying. The utility model has a novel structure and an ingenious design. It is convenient for aligning the nuclear power pipeline that needs to be assembled, and it is convenient for fixing the nuclear power pipeline that needs to be assembled. It has good stability and is convenient for use. At the same time, it is convenient for carrying when not in 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 3This is a top view of the upper support block of the utility model;

[0018] Numbers in the figure: 1. base; 2. bolt; 3. jack; 4. bearing platform; 5. upper support block; 6. plug column; 7. first external thread; 8. nut; 9. hat groove; 10. socket; 11. pressure rod; 12. threaded barrel; 13. second external thread; 14. rotating handle; 15. limit plate; 16. pressure ear; 17. pressure ring; 18. first through hole; 19. second through hole. 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 welding assembly device for an embedded nozzle of a nuclear power pipeline, comprising a base 1 arranged at the bottom and a jack 3 installed at the top of the base 1 by bolts 2, and also comprising a bearing platform 4, an upper support block 5, a plug column 6, a first external thread 7, a nut 8, a cap groove 9 and a socket 10. The top of the jack 3 is installed with a bearing platform 4, the top of the bearing platform 4 is provided with an upper support block 5, the bottom end of the upper support block 5 is provided with a plurality of plug columns 6, the surface of the plug column 6 is provided with a first external thread 7, the plug column 6 is located at the bottom end of the bearing platform 4 and is screwed with a nut 8, and a crimping assembly is provided on the upper support block 5;

[0021] The crimping assembly includes a pressing rod 11, a threaded barrel 12, a second external thread 13, a rotating handle 14, a limiting disk 15, a pressing ear 16, a pressing ring 17, a first through hole 18 and a second through hole 19. The threaded barrel 12 is symmetrically fixed inside the upper support block 5. The pressing rod 11 is screwed into the threaded barrel 12. The second external thread 13 is provided on the surface of the pressing rod 11. A rotating handle 14 is provided at the top of the pressing rod 11. A limiting disk 15 is welded on the pressing rod 11 below the rotating handle 14. A pressing ear 16 is sleeved on the pressing rod 11 at the bottom of the limiting disk 15, and a pressing ring 17 is fixed to the inner side of the pressing ear 16.

[0022] Specific use: When the utility model is used and assembled, the plug post 6 at the bottom end of the upper support block 5 is inserted into the corresponding plug hole 10, and the upper nut 8 is screwed on to fix it. The nuclear power pipeline that needs to be assembled is placed on the arc-shaped part of the upper support block 5. After the placement is completed, the nuclear power pipeline is aligned by the lifting and lowering of the jack 3. After alignment, the pressure ring 17 is placed on the top of the pipeline, and then the two pressure rods 11 are passed through the first through hole 18 of the pressure ear 16 and screwed into the threaded barrel 12. The rotating handle 14 is provided to facilitate the rotation of the pressure rod 11. In this way, the top of the nuclear power pipeline that needs to be assembled can be fixed, and the overall fixing stability is improved. When not in use, unscrew the nut 8, remove the upper support block 5, and then rotate the pressure rod 11 by rotating the handle 14, and the pressure rod 11 is screwed off the threaded barrel 12, and the pressure rod 11 and the pressure ring 17 can be removed for easy carrying.

[0023] Beneficial effects: The utility model has a novel structure and an ingenious conception, is convenient for aligning and fixing nuclear power pipelines that need to be assembled, has good stability, is easy to use, and is convenient to carry when not in use.

[0024] Embodiment 2

[0025] In the first embodiment, the nut 8 is difficult to hide. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a cap groove 9 is provided at the position of the support platform 4 corresponding to the nut 8 to facilitate hiding of the nut 8.

[0026] Embodiment 3

[0027] In the first embodiment, the plug 6 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a socket 10 is provided at the position of the support platform 4 corresponding to the plug-in column 6 to facilitate the plug-in use of the plug-in column 6.

[0028] Embodiment 4

[0029] In the first embodiment, the pressure rod 11 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a first through hole 18 is provided at the position of the pressing ear 16 corresponding to the pressing rod 11 to facilitate the insertion and use of the pressing rod 11.

[0030] Embodiment 5

[0031] In the first embodiment, the pressure rod 11 is inconvenient to plug in. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a second through hole 19 is provided at the position of the support platform 4 corresponding to the pressure rod 11 to facilitate the insertion of the pressure rod 11.

[0032] Embodiment 6

[0033] In the first embodiment, the threaded barrel 12 is not easy to match with the second through hole 19. Figure 1 As another preferred embodiment, the difference from the first embodiment is that the threaded barrel 12 is flush with the second through hole 19, which facilitates the coordinated use of the threaded barrel 12 and the second through hole 19.

[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 welding assembly device for an embedded nozzle of a nuclear power pipeline, comprising a base (1) arranged at the bottom and a jack (3) mounted on the top of the base (1) by bolts (2), characterized in that: It also includes a bearing platform (4), an upper support block (5), a plug column (6), a first external thread (7), a nut (8), a cap groove (9) and a socket (10), wherein the top of the jack (3) is provided with a bearing platform (4), the top of the bearing platform (4) is provided with an upper support block (5), the bottom of the upper support block (5) is provided with a plurality of plug columns (6), the surface of the plug column (6) is provided with a first external thread (7), the plug column (6) is located at the bottom of the bearing platform (4) and is screwed with a nut (8), and a crimping assembly is provided on the upper support block (5); The crimping assembly comprises a pressing rod (11), a threaded barrel (12), a second external thread (13), a rotating handle (14), a limiting plate (15), a pressing ear (16), a pressing ring (17), a first through hole (18) and a second through hole (19); the threaded barrel (12) is symmetrically fixed inside the upper support block (5); the pressing rod (11) is screwed inside the threaded barrel (12); the surface of the pressing rod (11) is provided with a second external thread (13); the top of the pressing rod (11) is provided with a rotating handle (14); a limiting plate (15) is welded on the pressing rod (11) below the rotating handle (14); a pressing ear (16) is sleeved on the pressing rod (11) at the bottom of the limiting plate (15); and a pressing ring (17) is fixed on the inner side of the pressing ear (16).

2. The welding assembly device for an embedded nozzle of a nuclear power pipeline according to claim 1 is characterized in that: The bearing platform (4) is provided with a cap groove (9) at a position corresponding to the nut (8).

3. The welding assembly device for embedded nozzles of nuclear power pipelines according to claim 1 is characterized in that: The support platform (4) is provided with an insertion hole (10) at a position corresponding to the insertion column (6).

4. The welding assembly device for embedded nozzles of nuclear power pipelines according to claim 1 is characterized in that: The pressing ear (16) is provided with a first through hole (18) at a position corresponding to the pressing rod (11).

5. The welding assembly device for embedded nozzles of nuclear power pipelines according to claim 1 is characterized in that: The bearing platform (4) is provided with a second through hole (19) at a position corresponding to the pressure rod (11).

6. The welding assembly device for embedded nozzles of nuclear power pipelines according to claim 5 is characterized in that: The threaded barrel (12) is flush with the second through hole (19).

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