A capacitor core welding tool for flexible straight

Abstract

The utility model discloses a capacitor core welding frock for flexible straight, including the first limiting component and the second limiting component at capacitor assembly both sides, be provided with locking positioning device between the first limiting component and the second limiting component, the first limiting component surface has a plurality of array arrangement's first limiting opening, be provided with the first limiting claw in the first limiting opening, the second limiting component surface has a plurality of array arrangement's second limiting opening, be provided with the second limiting claw in the second limiting opening, the first limiting claw and the second limiting claw all partially protrude to the inside and all have elasticity. The utility model can guarantee the accurate, stable of core stacking position, guarantee the accurate stable of subsequent welding, avoid appearing the state of shaking, inclination, unable to limit.

Description

Technical Field

[0001] This utility model relates to the field of capacitor manufacturing technology, and in particular to a welding fixture for flexible capacitor cores. Background Technology

[0002] my country's ultra-high voltage (UHV) power transmission technology is currently in a world-leading position. However, the flexible DC capacitors used in UHV transmission towers mainly rely on imported capacitors. To solve the bottleneck problem of imported capacitors, the State Grid Corporation of China has taken the lead in carrying out a project to localize flexible DC capacitors. In order to improve the welding performance and reliability of domestically produced flexible DC capacitors, the adoption of automatic welding equipment is an inevitable trend.

[0003] Existing welding limiting fixtures are simple in structure, mostly rectangular limiting frames, which achieve initial limiting of capacitors. However, flexible DC capacitors are large in size and have a large number of cores connected in parallel inside. During capacitor welding, the position of the cores is prone to displacement, resulting in misalignment of the solder joints and uneven stacking of the cores. This can lead to tilting during subsequent assembly, affecting the distance between the capacitor cores and the outer casing, causing partial discharge defects in the capacitor terminals, and in severe cases, causing the cores to short-circuit to the outer casing. Furthermore, during capacitor core welding, the copper busbars connected to the cores need to be tightly attached to the core surface so that they can be firmly wrapped by solder. Due to the slight differences in size between the numerous cores, the copper busbars may not be tightly attached to the surface of some cores, affecting the weld strength and potentially causing some solder joints on the copper busbars to detach from the cores. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flexible capacitor core welding fixture that ensures the accurate and stable placement of the cores, guarantees the accuracy and stability of subsequent welding, and avoids shaking, tilting, or inability to limit positioning.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A welding fixture for flexible capacitor cores includes a first limiting component and a second limiting component located on both sides of a capacitor assembly. A locking and positioning device is provided between the first limiting component and the second limiting component. The surface of the first limiting component has multiple arrayed first limiting openings, and a first limiting claw is provided in each of the first limiting openings. The surface of the second limiting component has multiple arrayed second limiting openings, and a second limiting claw is provided in each of the second limiting openings. Both the first limiting claw and the second limiting claw partially protrude inward and are elastic. A wavy limiting plate is also provided at the lower end of the first limiting component, and multiple spaced limiting posts are provided at the upper end of the second limiting component.

[0007] Preferably, the limiting claw is π-shaped, and the limiting claw engages with the corresponding limiting component.

[0008] Preferably, a first reinforcing strip is fixed inside the limiting opening, and a second reinforcing strip is formed between two adjacent limiting openings, with the limiting claw engaging with the reinforcing strip.

[0009] Preferably, the first limiting claw and the second limiting claw deflect around the vertical axis by a predetermined angle, and the first limiting claw and the second limiting claw form a predetermined included angle between the horizontal projection plane.

[0010] Preferably, the first limiting component is fixed with a press-fit limiting frame on both the front and rear sides, and the press-fit limiting frame has an L-shaped cross section.

[0011] Preferably, the first limiting component has grip ears fixed on both the left and right sides, and the grip ears are perpendicular to the limiting plate.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] By setting the first and second limiting components, the capacitor assembly can be clamped and limited on both sides. The limiting opening allows the welding gun to pass through for automatic welding. At the same time, the limiting claws on both sides can squeeze and limit the individual cores, ensuring that the cores are in a stable limiting state during the squeezing and limiting process. The combination of the limiting plate and the limiting post can limit and calibrate the cores during the arrangement process, ensuring the accuracy and stability of the core stacking position, ensuring the accuracy and stability of subsequent welding, and avoiding the state of shaking, tilting, or failure to limit. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0016] Figure 3 This utility model Figure 2 A magnified structural diagram at point A.

[0017] Figure 4 This utility model Figure 2 A magnified structural diagram at point B.

[0018] Figure 5 This utility model Figure 2 A magnified structural diagram at point C.

[0019] In the diagram: 100, first limiting component; 110, first limiting opening; 120, gripping ear; 130, press-fit limiting frame; 140, first limiting claw; 150, limiting plate; 200, capacitor assembly; 210, core; 220, copper busbar; 230, pin; 300, second limiting component; 310, second limiting opening; 320, second limiting claw; 330, limiting post; 400, locking and positioning device; 410, positioning rod; 420, positioning cylinder. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] To address the problems mentioned in the background art, see Appendix Figure 1 - Appendix Figure 5 A flexible capacitor core welding fixture includes a first limiting component 100 and a second limiting component 300 located on both sides of a capacitor assembly 200. A locking and positioning device 400 is provided between the first limiting component 100 and the second limiting component 300. The first limiting component 100 and the second limiting component 300 are located on both sides to limit the capacitor assembly 200 located in the middle. The capacitor assembly 200 includes multiple cores 210 and copper busbars 220. Pins 230 are provided on both sides of the copper busbars 220 to connect with the cores 210. During the welding process, the pins 230 are welded and fixed to the corresponding cores 210 to realize the overall processing and manufacturing of the capacitor assembly 200. During the welding process, the capacitor assembly 200 is clamped and limited by the first limiting component 100 and the second limiting component 300 on both sides, ensuring the stability of the cores 210 and copper busbars 220 inside the capacitor assembly 200 during the welding process.

[0023] The locking and positioning device 400 here includes a positioning rod 410 and a positioning cylinder 420. Multiple locking and positioning devices 400 are arranged circumferentially around the first limiting component 100 and the second limiting component 300. During the insertion process, the first limiting component 100 and the second limiting component 300 are fixed together to ensure the accuracy and stability of the overall limiting structure. A snap-fit ​​structure can be provided between the positioning rod 410 and the positioning cylinder 420 to ensure the accuracy and stability of the overall limiting after the two are inserted and fixed.

[0024] Multiple arrayed first limiting openings 110 are formed on the surface of the first limiting component 100, and a first limiting claw 140 is provided in the first limiting opening 110. Multiple arrayed second limiting openings 310 are formed on the surface of the second limiting component 300, and a second limiting claw 320 is provided in the second limiting opening 310. A predetermined welding window can be formed through the first limiting openings 110 and the second limiting openings 310, allowing the welding gun to enter for welding. At the same time, the multiple limiting claws can clamp the multiple cores 210 of the capacitor assembly 200 from the upper and lower sides respectively. The first limiting claw 140 and the second limiting claw 320 are respectively located on both sides to clamp and limit the individual cores 210 from both sides, further ensuring the stability of the overall limiting and clamping of the capacitor assembly 200.

[0025] The first limiting claw 140 and the second limiting claw 320 both protrude inwards and are elastic. The elastically configured limiting claws can further and effectively clamp and limit the core 210, and can adaptively clamp and limit the core 210 according to the different batches of core 210 of different heights, further ensuring the accuracy and stability of the core 210 welding limit. A wave-shaped limiting plate 150 is also provided at the lower end of the first limiting component 100, and multiple spaced limiting posts 330 are provided at the upper end of the second limiting component 300. By setting the limiting plate 150 to be located on one side for reference limiting, the accuracy of the initial position of multiple cores 210 during placement is ensured. By setting the limiting post 330 to be located in the middle for further limiting of the core 210, the four cores 210 form an arc-shaped gap, and the limiting post 330 is located within this gap to support and position the cores 210 around it.

[0026] The limiting plate 150 and the limiting post 330 are detachable. The specifications of the limiting plate 150 and the limiting post 330 can be selectively adjusted according to the outer diameter of different cores 210, so as to achieve adaptive clamping and limiting for different batches of capacitors.

[0027] Furthermore, the limiting claw is π-shaped and engages with the corresponding limiting component. The groove at the lower end of the limiting claw has a certain elasticity, which allows the limiting claw to open and fit onto the protruding part of the corresponding limiting component, thus achieving engagement. Similarly, the specifications and position of the limiting claw can be adjusted according to different capacitor specifications, improving the adaptability of this welding fixture.

[0028] A first reinforcing strip is fixed inside the limiting opening, and a second reinforcing strip is formed between two adjacent limiting openings. The limiting claw is engaged with the reinforcing strip. By setting the first reinforcing strip, an additional limiting claw can be installed in the limiting opening, which is especially suitable for limiting openings with a large length span and cores 210 with a small diameter.

[0029] Furthermore, the first limiting claw 140 and the second limiting claw 320 deflect around the vertical axis by a predetermined angle, and the first limiting claw 140 and the second limiting claw 320 are located between the horizontal projection plane to form a predetermined angle; the first limiting claw 140 and the second limiting claw 320 deflect by a predetermined angle can be staggered to form a larger clamping range, avoiding the effect of the upper and lower limiting claws being located in different vertical planes on the clamped core 210 to further ensure the stability of the core 210 during the limiting process.

[0030] The aforementioned reinforcing strip can be set with a predetermined tilt angle, so that the limiting claw can form a predetermined tilt angle during installation, ensuring accurate and stable installation positioning.

[0031] Furthermore, the first limiting component 100 is fixed with pressing limiting frames 130 on both the front and rear sides. The pressing limiting frame 130 has an L-shaped cross-section. The pressing limiting frame 130 can cooperate with mechanical pressing equipment to press and connect the first limiting component 100 and the second limiting component 300. By applying a predetermined force to the pressing limiting frame 130, the first limiting component 100 and the second limiting component 300 can be connected and engaged. It can cooperate with the mechanical pressing production line to press and shape the first limiting component 100 and the second limiting component 300 in an assembly line manner.

[0032] Grip ears 120 are fixed on both the left and right sides of the first limiting component 100, and the grip ears are perpendicular to the limiting plate 150. Before and after clamping, the grip ears 120 can be set to facilitate the staff to grip and lift the whole, especially for the capacitor component 200 which is larger in size and heavier, making it easier for the staff to move it.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flexible capacitor core welding fixture, comprising a first limiting component (100) and a second limiting component (300) located on both sides of a capacitor assembly (200), characterized in that: A locking and positioning device (400) is provided between the first limiting component (100) and the second limiting component (300). The surface of the first limiting component (100) has a plurality of arrayed first limiting openings (110), and a first limiting claw (140) is provided in the first limiting opening (110). The surface of the second limiting component (300) has a plurality of arrayed second limiting openings (310), and a second limiting claw (320) is provided in the second limiting opening (310). The first limiting claw (140) and the second limiting claw (320) both protrude inward and are elastic. The lower end of the first limiting component (100) is also provided with a wave-shaped limiting plate (150), and the upper end of the second limiting component (300) is provided with a plurality of spaced limiting posts (330).

2. The capacitor core welding tool for a SMES according to claim 1, wherein The limiting claw is π-shaped and engages with the corresponding limiting component.

3. The flexible DC capacitor core welding fixture according to claim 2, characterized in that, A first reinforcing strip is fixed inside the limiting opening, and a second reinforcing strip is formed between two adjacent limiting openings. The limiting claw engages with the reinforcing strip.

4. The flexible DC capacitor core welding fixture according to claim 1, characterized in that, The first limiting claw (140) and the second limiting claw (320) deflect around the vertical axis by a predetermined angle, and the first limiting claw (140) and the second limiting claw (320) are located between the horizontal projection plane to form a predetermined angle.

5. The flexible DC capacitor core welding fixture according to claim 1, characterized in that, The first limiting component (100) has a press-fit limiting frame (130) fixed on both the front and rear sides, and the press-fit limiting frame (130) has an L-shaped cross section.

6. The flexible DC capacitor core welding fixture according to claim 1, characterized in that, The first limiting component (100) has grip ears (120) fixed on both the left and right sides, and the grip ears are perpendicular to the limiting plate (150).

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