A fuel rod adjustment tool

Abstract

This utility model discloses a fuel rod adjustment fixture, including a base and a top rod. The bottom of the base is fixed to a mounting platform. Multiple threaded holes corresponding to the fuel rods are horizontally opened on the base, and screws are threaded into these holes. One end of the screw has a tightening part, and the other end coaxially abuts against the end of a rotating shaft. The rotating shaft is coaxially rotatably mounted in a sleeve. A pressure sensor is fixedly installed at the end of the sleeve away from the screw. One end of the top rod, coaxially arranged with the rotating shaft, is fixedly installed on the pressure sensor, and the other end abuts against the fuel rod. This device can be used at both ends of the fuel rod assembly, effectively adjusting the position of fuel rods that have been pulled too far or not to the correct position. This effectively solves the problem of inconvenient fuel rod position adjustment in existing equipment. It has low manufacturing cost, a simple and effective structure, and is very convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of fuel rod installation equipment, specifically relating to a fuel rod adjustment tool. Background Technology

[0002] During the assembly of fuel rod assemblies, multiple fuel rods need to be pulled into the assembly frame and kept in the same plane. Existing equipment and processes cannot guarantee that all fuel rods can be pulled to the designated position, so the position of the fuel rods needs to be adjusted.

[0003] The existing method for adjusting the position involves manually pulling out the fuel rod using a clamping fixture. This method cannot measure the force applied to the fuel rod during pulling, and it can easily damage the fuel rod. To solve the above problems, a fuel rod adjustment fixture with thrust detection is needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a fuel rod adjustment fixture. This device can be used at both ends of the fuel rod assembly, and can effectively adjust the position of fuel rods that have been pulled over or under, thereby effectively solving the problem that existing equipment is inconvenient for adjusting the position of fuel rods. It has low manufacturing cost, simple and effective structure, and is very convenient to use.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A fuel rod adjustment fixture includes a base and a push rod. The bottom of the base is fixed to a mounting platform. The base has multiple threaded holes horizontally opened, corresponding to the fuel rods. A screw is threaded into each threaded hole. One end of the screw has a tightening part, and the other end coaxially abuts against the end of a rotating shaft. The rotating shaft is coaxially rotatably mounted in a sleeve. A pressure sensor is fixedly mounted on the end of the sleeve away from the screw. One end of the push rod, which is coaxially arranged with the rotating shaft, is fixedly mounted on the pressure sensor, and the other end abuts against the fuel rod.

[0007] Preferably, the screwing part is a handwheel, which is mounted on the end of the screw.

[0008] Preferably, the rotating shaft is rotatably mounted inside the sleeve via a thrust ball bearing and a deep groove ball bearing.

[0009] Preferably, a bearing cap is installed at the opening of the sleeve.

[0010] Preferably, the bottom of the base is provided with a keyway, which engages with a key on the mounting platform.

[0011] Preferably, the base has multiple oblong holes vertically extending through its lower part, and bolts pass through these oblong holes to fix the base to the mounting platform.

[0012] Preferably, the end of the screw is provided with a cone head, and the end of the rotating shaft is provided with a cone hole that mates with the cone head.

[0013] Preferably, the base includes a base plate and a vertical plate, the vertical plate being vertically fixed to the base plate; the base plate is fixed to the mounting platform, and the threaded hole is provided on the vertical plate.

[0014] Preferably, a reinforcing triangular plate is vertically fixed between the base plate and the vertical plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. For fuel rods that have been pulled to the correct position or not pulled to the correct position, this application uses a handwheel to drive the screw to rotate and move laterally in the threaded hole, thereby achieving smooth pushing of the fuel rod. It can push the fuel rod to the appropriate position in a small range, and can use a pressure sensor to monitor the pushing force in real time, so as to avoid damage to the fuel rod due to excessive force.

[0017] 2. Since the screw and the shaft are connected by a movable contact, this application can improve the stability of the screw and the shaft when they are connected by the cooperation of the cone head and the cone hole.

[0018] 3. This application improves the stability of the shaft when rotating inside the sleeve by setting a thrust ball bearing and a deep groove ball bearing. In addition, a bearing cap is installed at the left opening of the sleeve to prevent debris, dust and other objects from entering the sleeve and affecting the rotation of the shaft and bearing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the internal structure of this utility model.

[0021] Reference numerals: 1. Base; 2. Screw; 3. Shaft; 4. Deep groove ball bearing; 5. Thrust bearing; 6. Sleeve; 61. Pad; 62. Bearing cap; 7. Pressure sensor; 8. Top rod; 9. Handwheel; 10. Threaded hole; 11. Vertical plate; 12. Base plate; 121. Keyway; 122. Oblong hole; 13. Reinforcing triangle. Detailed Implementation

[0022] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of application of this utility model.

[0023] like Figure 1-2As shown, this utility model proposes a fuel rod adjustment fixture, including a base 1 and a top rod 8. The bottom of the base 1 is fixed to a mounting platform. Multiple threaded holes 10 corresponding to the fuel rods are horizontally opened on the base 1, and screws 2 are threadedly connected to the threaded holes 10. One end of the screw 2 has a tightening part, and the other end coaxially abuts against the end of a rotating shaft 3. In this embodiment, the tightening part is a handwheel 9, which is installed at the end of the screw 2. In this application, the handwheel 9 drives the screw 2 to rotate and move laterally within the threaded holes 10, thereby achieving smooth pushing of the fuel rods.

[0024] Furthermore, the end of the screw 2 in this application is provided with a tapered head, and the end of the rotating shaft 3 is provided with a tapered hole that mates with the tapered head. Since the screw 2 and the rotating shaft 3 are connected by a movable contact, the stability of the screw 2 and the rotating shaft 3 when they are connected can be improved by the cooperation of the tapered head and the tapered hole.

[0025] The rotating shaft 3 is coaxially mounted in the sleeve 6. The sleeve 6 is closed at the right end and open at the left end. A deep groove ball bearing 4 is installed at the left opening of the sleeve 6, and a thrust ball bearing 5 is installed inside. The inner end face of the sleeve 6 is also provided with a pad 61 that mates with the thrust ball bearing 5. The rotating shaft 3 is rotatably mounted in the sleeve 6 via the thrust ball bearing 5 and the deep groove ball bearing 4, and the left end of the rotating shaft 3 extends outward from the sleeve 6 and abuts against the screw 2. By setting the thrust ball bearing 5 and the deep groove ball bearing 4, this application can improve the stability of the rotating shaft 3 when rotating in the sleeve 6. In addition, a bearing cap 62 is installed at the left opening of the sleeve 6 to prevent debris, dust, etc. from entering the inside of the sleeve 6 and affecting the rotation of the rotating shaft 3 and the bearing.

[0026] A pressure sensor 7 is fixedly installed at the right end of the sleeve 6 away from the screw 2. The push rod 8, the rotating shaft 3, and the screw 2 are all on the same axis. The left end of the push rod 8 is horizontally fixedly installed on the pressure sensor 7, and the right end abuts against the fuel rod. When the screw 2 moves horizontally to the right against the rotating shaft 3, it will cause the push rod 8 to push the fuel rod to the right horizontally. The force of pushing the fuel rod can be monitored in real time using the pressure sensor 7.

[0027] Furthermore, in this embodiment, the specific structure of the base 1 includes a base plate 12 and a vertical plate 11, with the vertical plate 11 vertically fixed to the base plate 12; the base plate 12 is fixed to the mounting platform, and threaded holes 10 are formed in the vertical plate 11. A reinforcing triangular plate 13 is vertically fixed between the base plate 12 and the vertical plate 11, which can improve the structural strength of the base 1.

[0028] The bottom of the base plate 12 has horizontal keyways 121, which mate with keys on the mounting platform. The base 1 slides along the keyways 121, allowing for adjustable positioning of the base 1 on the mounting platform and improving its stability. Furthermore, the base plate 12 has multiple vertical through-holes 122. Bolts pass through these holes to secure the base 1 to the mounting platform. Loosening the bolts allows the base 1 to be moved left or right, changing the position of the bolts within the holes 122, thus enabling fine-tuning of the base 1's lateral position.

[0029] When using this utility model, after the base 1 is fixedly installed on the mounting platform, the end of the push rod 8 is abutted against the fuel rod. According to the position of the fuel rod, the screw 2 is installed in the corresponding threaded hole 10 of the base 1 and abutted against the end of the rotating shaft 3. Then, by rotating the handwheel 9, the screw 2 is extended laterally and the fuel rod is pushed to move laterally, thereby realizing the position adjustment of the fuel rod. During this process, the pressure sensor 7 can realize the real-time monitoring of the pushing force to avoid damage to the fuel rod due to excessive force.

[0030] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A fuel rod alignment fixture comprising a base and a top rod, characterized by: The base is fixed to the mounting platform at its bottom. The base has multiple threaded holes horizontally opened on it, corresponding to the fuel rods. A screw is threaded into each of the threaded holes. One end of the screw has a screwing part, and the other end is coaxially abutted against the end of the rotating shaft. The rotating shaft is coaxially rotatably mounted in a sleeve. A pressure sensor is fixedly mounted on the end of the sleeve away from the screw. One end of a push rod, which is coaxially arranged with the rotating shaft, is fixedly mounted on the pressure sensor, and the other end abuts against the fuel rod.

2. The fuel rod alignment fixture of claim 1, wherein: The screwing part is a handwheel, which is installed at the end of the screw.

3. The fuel rod adjustment tool of claim 1, wherein: The rotating shaft is rotatably mounted inside the sleeve via a thrust ball bearing and a deep groove ball bearing.

4. The fuel rod alignment fixture of claim 3, wherein: A bearing cap is installed at the opening of the sleeve.

5. The fuel rod adjustment tool of claim 1, wherein: The bottom of the base has a keyway that mates with a key on the mounting platform.

6. The fuel rod adjustment tool of claim 1, wherein: The base has multiple waist-shaped holes vertically through its lower part, and bolts pass through these holes to fix the base to the mounting platform.

7. The fuel rod adjustment tool of claim 1, wherein: The screw has a tapered head at one end, and the shaft has a tapered hole at one end that mates with the tapered head.

8. The fuel rod adjustment tool of claim 1, wherein: The base includes a base plate and a vertical plate, with the vertical plate being vertically fixed to the base plate; the base plate is fixed to the mounting platform, and the threaded hole is provided on the vertical plate.

9. The fuel rod adjustment tool of claim 8, wherein: A reinforcing triangular plate is vertically fixed between the base plate and the vertical plate.

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