Positioning spring mounting tool

Abstract

The utility model relates to the technical field of manufacturing of AP1000 reactor core related components, and discloses a positioning spring mounting tool, which comprises a base handle, a support connecting block mounted on the base handle, a compression bar mounted on the support connecting block, a round hole connected with the support connecting block at one end of a spring, a screw connected with the base handle at the other end of the spring, and an extension mandrel connected with the support connecting block at one end and connected with the compression bar at the other end of the spring. The other end is connected with the spring mounting head. When a related assembly single rod is prepared, the tool can quickly install the positioning spring in place, meanwhile, the inner wall of a pipe and a core block in the pipe cannot be damaged, and it can be effectively guaranteed that parts such as the core block cannot move in the pipe. The supporting connecting block can be driven to rotate around the center supporting rod only by applying certain force to the pressing rod, the upper end moves forwards, the lower end moves backwards, then the extended core shaft is driven to move backwards, and the purpose of releasing the spring from a long distance is achieved.

Description

Technical Field

[0001] This utility model relates to the field of AP1000 reactor core related component manufacturing technology, and in particular to a positioning spring installation tool. Background Technology

[0002] Core-related components are crucial parts of the reactor, playing a vital role in its safe and stable operation. These components work directly with the fuel assemblies within the core and possess certain auxiliary functions, including: providing core reactivity control, providing the neutron source required for core startup, and providing flow control for open ducts.

[0003] The primary function of the positioning spring is to secure the core block within the individual rods of relevant components. This prevents the core block from sliding within the rod due to minor vibrations caused by water flow during transportation or within the reactor, which could alter its position and affect the stable operation of the reactor. Therefore, the core block must be fixed within the rods of the relevant components. Because the installed positioning spring has a C-shaped structure and needs to be installed within a slender, thin-walled tube approximately 1900 mm in diameter, the spring must not be damaged or the inner wall of the tube scratched during installation.

[0004] In existing technology, a slender, solid straight rod is used to press down on the positioning spring at one end, while external force is applied to the other end to load the positioning spring using brute force. This installation method has the following disadvantages: First, the process relies entirely on manual or mechanical force, which can easily cause damage to the positioning spring or scratches on the inner wall of the pipe; second, it is impossible to predict whether the positioning spring is installed correctly, and overloading can easily damage the internal core. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art and provide a positioning spring installation tool that can quickly install the positioning spring in place when preparing related component single rods, without damaging the inner wall of the pipe or the core block inside the pipe, and can effectively ensure that the core block and other components do not move inside the pipe.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A positioning spring installation tool includes a base handle, a support connecting block mounted on the base handle, and a pressure rod mounted on the support connecting block; one end of a spring is connected to a circular hole in the support connecting block, and the other end is connected to a screw in the base handle; one end of an extension mandrel is connected to the support connecting block, and the other end is connected to a spring mounting head.

[0008] In some embodiments, the support connecting block is connected to the base shank by connecting screws.

[0009] In some embodiments, the pressure bar is connected to the support connecting block via a second connecting pin.

[0010] In some embodiments, the support connecting block is connected to the base handle via a central support rod.

[0011] In some embodiments, a graduated sleeve is fitted over the extension mandrel.

[0012] In some embodiments, a limiting ring is installed on the graduated sleeve.

[0013] In some embodiments, an auxiliary sleeve is provided outside the graduated sleeve, and the auxiliary sleeve is arranged on the right side of the limiting ring.

[0014] In some embodiments, the auxiliary unsleeving is welded to the graduated sleeve.

[0015] In some embodiments, the graduated sleeve and the spring are arranged in parallel.

[0016] In some embodiments, the extension mandrel is connected to the spring mounting head via a first connecting pin.

[0017] Compared with the prior art, the positioning spring installation tool provided by this utility model has the following advantages:

[0018] This invention utilizes the lever principle, requiring only a certain force to be applied to the pressure rod to cause the support connecting block to rotate around the central support rod, with the upper end moving forward and the lower end moving backward, thereby causing the extension core to move backward and achieving the purpose of releasing the spring over a long distance.

[0019] Furthermore, the extended mandrel is fitted with a graduated sleeve and a limiting ring, which effectively ensures that the positioning spring is installed in a position that meets the technical requirements and prevents damage to the internal core block caused by improper or excessive installation. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the technical description will be briefly introduced below.

[0021] Figure 1 A schematic diagram of the positioning spring installation tool provided by this utility model;

[0022] Figure 2 A schematic diagram of the structure of the support connecting block provided by this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Spring mounting head; 2. Auxiliary release sleeve; 3. First connecting pin; 4. Limiting ring; 5. Scale sleeve; 6. Base handle; 7. Connecting screw; 8. Support connecting block; 9. Spring; 10. Second connecting pin; 11. Pressure rod; 12. Locking nut; 13. Center support rod; 14. Extension mandrel. Detailed Implementation

[0025] The following detailed description provides further details on specific implementation methods.

[0026] like Figure 1 As shown, this utility model provides a positioning spring installation tool, including a spring mounting head 1, an auxiliary release sleeve 2, a first connecting pin 3, a limiting ring 4, a scale sleeve 5, a base 6, a connecting screw 7, a support connecting block 8, a spring 9, a second connecting pin 10, a pressure rod 11, a locking nut 12, and a central support rod 13.

[0027] The base shank 6 is L-shaped with an internal groove structure. The support connecting block 8 is connected to the base shank 6 by the connecting screw 7. One end of the spring 9 is hooked on the round hole of the support connecting block 8, and the other end is hooked on the screw 15 of the base shank 6, thus achieving the connection.

[0028] The pressure rod 11 is a rod-shaped structure, and it is connected to the support connecting block 8 via the second connecting pin 10. The central support rod 13 is riveted to the support connecting block 8. The central support rod 13 is a slender wedge shape, and its function is to lock the pressure rod 11 in place when it is pressed, so that the pressure rod 11 remains in a pressed state for a long time.

[0029] One end of the extension spindle 14 passes through the support connecting block 8 and is connected to the support connecting block 8 by means of the locking nut 12, while the other end is connected to the spring mounting head 1 by means of the first connecting pin 3. The scale sleeve 5 is fitted on the outside of the extension spindle 14 and is connected to the base shank 6 by means of riveting.

[0030] The pressure rod 11, the support connecting block 8, and the extension spindle 14 work together to achieve the effect of force transmission, and can cleverly achieve the operation of releasing the positioning spring from a distance.

[0031] The installation position of spring 9 is parallel to the installation position of graduated sleeve 5, and their axes are parallel.

[0032] In one embodiment, the auxiliary release sleeve 2 is fixed to the scale sleeve 5 by welding, and the limiting ring 4 is fitted onto the scale sleeve 5 and positioned by its own tightening screw.

[0033] The extension spindle 14 of this tool is equipped with a graduated sleeve 5 and a limiting ring 4, which can effectively ensure that the installation position of the positioning spring meets the technical requirements.

[0034] Figure 2 The structure of the support connecting block 8 is shown. The support connecting block 8 is an irregularly shaped structure with varying thickness. The upper end is a convex thin body with a hole on the edge, which facilitates its back-and-forth movement under the pull of the spring 9. The middle part is a cuboid with a boss and a hole in the center, which is connected to the base shank 6 by the connecting screw 7. The lower end is a flat cuboid with a hole in the center, which facilitates the graduation sleeve 5 and the extension mandrel 14 to pass through the middle.

[0035] When installing the positioning spring, first install the positioning spring onto the spring mounting head 1. The spring mounting head 1 has a similar shape and structure to the positioning spring, meeting the spring installation size requirements. Then, the operator holds the base handle 6 with one hand and supports the scale sleeve 5 with the other, slowly inserting it into the pipe from the unsealed end until the pipe end contacts the limiting ring 4. At this point, the positioning spring has reached the pre-installed position. Then, the operator presses the pressure rod 11, causing the support connecting block 8 to rotate around the connecting screw 7. The upper end of the support connecting block 8 moves forward, thus stretching the spring and generating tension. The lower end of the support connecting block 8 moves backward, which in turn causes the locking nut 12 to move backward. Under the action of the locking nut 12, the extended core axis moves backward, and the auxiliary release sleeve 2 remains stationary, acting as a locking mechanism to lock the moving end of the positioning spring. This allows the positioning spring to detach from the spring mounting head 1, achieving its positioning within the relevant rod. This ensures the accuracy of the position of the core block and other components within the rod, preventing movement due to transportation or vibration during stacking.

[0036] After installation, the operator releases the pressure rod 11. Under the action of the spring tension, the upper end of the support connecting block 8 rotates and moves backward, while the lower end moves forward, thereby achieving the reset action. Then, the operator removes the positioning spring installation tool from the pipe, completing all actions.

[0037] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning spring installation tool characterized by, It comprises a base handle (6), a support connecting block (8) is installed on the base handle (6), a pressing rod (11) is installed on the support connecting block (8); one end of a spring (9) is connected with a round hole of the support connecting block (8), and the other end is connected with a screw (15) of the base handle (6); one end of an extension mandrel (14) is connected with the support connecting block (8), and the other end is connected with a spring mounting head (1).

2. The positioning spring installation tool of claim 1, wherein, The support connecting block (8) is connected with the base handle (6) through a connecting screw (7).

3. The positioning spring installation tool of claim 1, wherein, The pressing rod (11) is connected with the support connecting block (8) through a second connecting pin shaft (10).

4. The positioning spring installation tool of claim 1, wherein, The support connecting block (8) is connected with the base handle (6) through a center support rod (13).

5. The positioning spring installation tool of claim 1, wherein, The extension mandrel (14) is externally sleeved with a scale sleeve (5).

6. The positioning spring installation tool of claim 5, wherein, A limiting circular ring (4) is installed on the scale sleeve (5).

7. The positioning spring installation tool of claim 6, wherein, An auxiliary stripping sleeve (2) is externally sleeved with the scale sleeve (5), and the auxiliary stripping sleeve (2) is arranged on the right side of the limiting circular ring (4).

8. The positioning spring installation tool of claim 7, wherein, The auxiliary stripping sleeve (2) is welded to the scale sleeve (5).

9. The positioning spring installation tool of claim 5, wherein, The scale sleeve (5) and the spring (9) are arranged in parallel.

10. The positioning spring installation tool of claim 1, wherein, The extension mandrel (14) is connected with the spring mounting head (1) through a first connecting pin shaft.

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