Modular demountable power capacitor

Abstract

The utility model discloses a modularization detachable power capacitor relates to capacitor installation technical field, it includes capacitor body, and is provided with the lead pin on capacitor body, and the outside of capacitor body is provided with the fixed ring, and is provided with a plurality of joint parts on the fixed ring, and the joint part contains fixed block, and the below of fixed block is integrally provided with the spring piece, and the spring piece is three -layer composite mechanism, and three -layer composite mechanism is from inside to outside in proper order is the inner layer, the intermediate layer and the outer layer, and one end of spring piece is provided with the conical block, and the conical block is away from the spring piece direction and extends the contact surface, and the contact surface is pasted with the external circuit board, and is provided with the clamping assembly on the fixed ring, and the clamping assembly is used for locking joint with the external circuit board with the conical block cooperation. This modularization detachable power capacitor passes through the joint part and clamping assembly, realized fast non - destructive dismounting, and by virtue of spring piece and conical block, improved stability, thereby improved installation maintenance efficiency and long - term operation life.

Description

Technical Field

[0001] This utility model relates to the field of capacitor installation technology, specifically a modular and detachable power capacitor. Background Technology

[0002] Power capacitors are key devices in power systems used for reactive power compensation, filtering, energy storage, and improving power quality. They are widely used in industry, new energy, and power transmission and distribution. With the development of power electronics technology and the increasing demand for modular and integrated equipment, higher requirements are being placed on the installation efficiency, ease of maintenance, and long-term operational reliability of capacitors.

[0003] Traditional power capacitors are typically mounted on circuit boards using methods such as welding, bolting, or plugging. This approach suffers from drawbacks including inconvenient assembly and disassembly, variable contact resistance, and insufficient resistance to vibration and thermal fatigue. Especially in scenarios requiring frequent maintenance or replacement, existing mounting methods can lead to pin damage or solder pad detachment due to mechanical stress, impacting the overall system stability and lifespan. Existing capacitor installation methods mainly include direct welding and screw fastening. Although welding connections are strong, they cannot be disassembled. Replacement requires heating to desolder, which can easily damage the circuit board. Screw fastening allows for repeated disassembly and assembly, but the operation is cumbersome and it is prone to loosening in high vibration environments, leading to poor contact and thus unreliable long-term operation.

[0004] Therefore, in order to address the above problems, the applicant needs to design a modular, detachable power capacitor to solve the problem. Utility Model Content

[0005] The purpose of this invention is to provide a modular, detachable power capacitor to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a modular detachable power capacitor, comprising a capacitor body with lead pins, a fixing ring fixedly disposed on the outer side of the capacitor body, and a plurality of snap-fit ​​components for connecting to an external circuit board on the fixing ring, the snap-fit ​​component comprising a fixing block fixedly connected to the fixing ring, and a circumferentially arrayed spring sheet integrally disposed below the fixing block, the spring sheet being a three-layer composite structure, the three-layer composite structure being an inner layer, a middle layer and an outer layer from the inside to the outside, a conical block disposed at the end of the spring sheet away from the fixing block, and a contact surface extending from the direction away from the spring sheet, the contact surface being in contact with the external circuit board, and a clamping component fixedly disposed on the fixing ring, the clamping component cooperating with the conical block for locking and snapping with the external circuit board.

[0007] Furthermore, the clamping assembly includes a stabilizing ring fixedly connected to the fixing block, and a spring is fixedly disposed on the stabilizing ring. A clamping ring is fixedly disposed on the end of the spring away from the stabilizing ring, and the clamping ring is disposed on the outside of the spring piece.

[0008] Through the above structural design, the spring and clamping ring structure enhances the stability of the engagement, effectively resists vibration and prevents loosening.

[0009] Furthermore, the contact surface of the cone-shaped block is plated with a silver layer.

[0010] Through the above structural design, the silver plating layer on the contact surface reduces the contact resistance and improves the reliability of the electrical connection.

[0011] Furthermore, the inner layer is an elastic metal layer, which is made of stainless steel.

[0012] Through the above structural design, the stainless steel inner layer provides excellent elastic recovery, ensuring the durability of the spring for long-term use.

[0013] Furthermore, the intermediate layer is a high-conductivity metal layer, which is made of silver and is coated on the surface of the inner layer.

[0014] Through the above structural design, the silver intermediate layer significantly improves conductivity and reduces energy loss during current transmission.

[0015] Furthermore, the outer layer is an anti-oxidation and corrosion-resistant metal layer, which is made of nickel and is coated on the surface of the middle layer.

[0016] Through the above structural design, the nickel outer layer effectively prevents environmental corrosion and oxidation, extending the service life of the spring.

[0017] Furthermore, the inner wall of the clamping ring is adapted to the shape of the outer wall of the spring piece, and the inner wall of the clamping ring is provided with a wear-resistant insulating coating.

[0018] Through the above structural design, the wear-resistant insulating coating avoids the risk of short circuit between the clamping ring and the spring, thus enhancing operational safety.

[0019] Furthermore, thermally conductive insulating adhesive is filled between the capacitor body and the fixing ring.

[0020] Through the above structural design, the thermally conductive insulating adhesive filling improves the heat dissipation performance of the capacitor while ensuring electrical insulation.

[0021] Compared with the prior art, the beneficial effects of this utility model are: This modular, detachable power capacitor achieves quick, non-destructive assembly and disassembly without tools through the synergistic effect of a triple-composite spring consisting of an elastic metal, a high-conductivity silver layer, and an anti-oxidation nickel layer in the snap-fit ​​component and the clamping assembly. This greatly improves installation and maintenance efficiency. Furthermore, its silver-plated contact surface with a conical block ensures extremely low contact resistance and excellent conductivity stability. Its unique elastic recovery and locking mechanism also provides superior vibration and loosening resistance. In addition, the filling with thermally conductive insulating adhesive effectively improves heat dissipation and ensures insulation, thus comprehensively enhancing the long-term operational reliability and service life of the capacitor under complex operating conditions. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the snap-fit ​​component of this utility model; Figure 3 This is a cross-sectional view of the snap-fit ​​component of this utility model; Figure 4 This is a schematic diagram of the layered spring sheet of this utility model.

[0023] In the diagram: 1. Capacitor body; 2. Snap-fit ​​component; 10. Lead pin; 11. Retaining ring; 20. Retaining block; 21. Spring; 22. Conical block; 23. Contact surface; 24. Stabilizing ring; 25. Spring; 26. Clamping ring; 210. Inner layer; 211. Middle layer; 212. Outer layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-4As shown, this utility model discloses a modular detachable power capacitor, including a capacitor body 1, and a lead 10 is provided on the capacitor body 1. A fixing ring 11 is fixedly provided on the outer side of the capacitor body 1, and a plurality of snap-fit ​​components 2 for connecting with an external circuit board are provided on the fixing ring 11. The snap-fit ​​component 2 includes a fixing block 20 fixedly connected to the fixing ring 11, and a circumferential array of spring pieces 21 is integrally provided below the fixing block 20. The spring piece 21 is a three-layer composite structure, and the three-layer composite structure consists of an inner layer 210, a middle layer 211 and an outer layer 212 from the inside to the outside. A conical block 22 is provided at the end of the spring piece 21 away from the fixing block 20, and a contact surface 23 extends from the direction away from the spring piece 21. The contact surface 23 is in contact with the external circuit board. A clamping component is fixedly provided on the fixing ring 11, and the clamping component cooperates with the conical block 22 to lock and snap with the external circuit board.

[0026] The clamping assembly includes a retaining ring 24 fixedly connected to the fixing block 20, and a spring 25 is fixedly mounted on the retaining ring 24. A clamping ring 26 is fixedly mounted on the end of the spring 25 away from the retaining ring 24, and the clamping ring 26 is located on the outside of the spring piece 21. The spring 25 in the clamping assembly can provide a continuous and adjustable clamping force for the clamping ring 26. When the spring piece 21 undergoes elastic deformation, the clamping ring 26 can move accordingly and firmly clamp the outside of the spring piece 21. This greatly enhances the mechanical stability of the snap-fit ​​component 2 after it engages with the external circuit board, enabling it to effectively resist vibration and impact during equipment operation and prevent poor contact caused by loosening.

[0027] The contact surface 23 of the cone-shaped block 22 is plated with a silver layer. The silver layer is plated on the contact surface 23 of the cone-shaped block 22. The excellent conductivity of silver can significantly reduce the contact resistance at this electrical connection point, reduce energy loss and heat generation during current transmission, and thus improve the reliability and efficiency of the electrical connection of the power capacitor.

[0028] The inner layer 210 is an elastic metal layer made of stainless steel. The inner layer 210 of the spring 21 is made of stainless steel, a metal material with excellent elasticity. This ensures that the spring 21 still has strong elastic recovery ability and fatigue resistance after repeated insertion and removal operations, thus ensuring the durability and longevity of the snap-fit ​​function and extending the service life of the entire component.

[0029] The intermediate layer 211 is a high-conductivity metal layer made of silver material, which is coated on the surface of the inner layer 210. The silver intermediate layer 211 set on the elastic inner layer provides a low-impedance current path for the spring 21. Its excellent high conductivity greatly optimizes the current transmission efficiency from the lead 10 to the circuit board and minimizes power loss.

[0030] The outer layer 212 is an anti-oxidation and corrosion-resistant metal layer. The anti-oxidation and corrosion-resistant metal layer is made of nickel and is covered on the surface of the middle layer 211. The nickel outer layer 212 forms a strong protective barrier. Its anti-oxidation and corrosion resistance can effectively resist the erosion of moisture, salt and other chemicals in the air, and protect the inner silver layer and inner core.

[0031] The inner wall of the clamping ring 26 is adapted to the shape of the outer wall of the spring piece 21, and the inner wall of the clamping ring 26 is provided with a wear-resistant insulating coating. The wear-resistant insulating coating provided on the inner wall of the clamping ring 26 reduces the wear caused by repeated friction with the outer wall of the spring piece 21, and at the same time eliminates the risk of electrical short circuit that may occur due to contact between the two, greatly enhancing the safety during operation and maintenance.

[0032] Thermally conductive insulating glue is filled between the capacitor body 1 and the fixing ring 11. Filling the space between the capacitor body 1 and the fixing ring 11 with thermally conductive insulating glue can efficiently conduct the heat generated by the capacitor during operation to the external fixing ring 11 for heat dissipation, thereby reducing the operating temperature of the core components. It can also play a good electrical insulation role, prevent short circuit to ground, and improve the reliability of the product.

[0033] When using this modular detachable power capacitor, when installation is required, the entire capacitor is pressed down so that the conical block 22 of the snap-fit ​​component 2 contacts and passes through the mounting hole of the circuit board. The spring piece 21 is squeezed inward. After installation, under the combined action of the elastic restoring force provided by the three-layer composite structure of the spring piece 21 and the spring 25 in the clamping assembly pushing the clamping ring 26 downward to tighten the spring piece 21, the silver-plated contact surface 23 of the conical block 22 is firmly opened and pressed tightly onto the circuit board pad, forming a tight mechanical lock and low-resistance electrical connection. When disassembling, simply lift the clamping ring 26 to release the constraint on the spring piece 21, and the capacitor can be easily pulled out, achieving fast, reliable and non-destructive disassembly and assembly.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A modular, detachable power capacitor, characterized in that, The capacitor includes a capacitor body (1) and is provided with lead pins (10). A fixing ring (11) is fixedly provided on the outer side of the capacitor body (1), and the fixing ring (11) is provided with a plurality of snap-fit ​​components (2) for connecting to an external circuit board. The snap-fit ​​component (2) includes a fixing block (20) fixedly connected to the fixing ring (11), and a circumferential array of spring pieces (21) is integrally provided below the fixing block (20). The spring pieces (21) are three-layer composite machines. The structure consists of an inner layer (210), a middle layer (211), and an outer layer (212) from the inside out. A conical block (22) is provided at the end of the spring piece (21) away from the fixing block (20), and a contact surface (23) extends from the direction away from the spring piece (21). The contact surface (23) is in contact with the external circuit board. A clamping component is fixedly provided on the fixing ring (11), and the clamping component cooperates with the conical block (22) to lock and snap into the external circuit board.

2. The modular detachable power capacitor according to claim 1, characterized in that: The clamping assembly includes a stabilizing ring (24) fixedly connected to the fixing block (20), and a spring (25) is fixedly provided on the stabilizing ring (24). A clamping ring (26) is fixedly provided at the end of the spring (25) away from the stabilizing ring (24), and the clamping ring (26) is located on the outside of the spring piece (21).

3. A modular, detachable power capacitor according to claim 1, characterized in that: The contact surface (23) of the cone-shaped block (22) is plated with a silver layer.

4. A modular detachable power capacitor according to claim 1, characterized in that: The inner layer (210) is an elastic metal layer, which is made of stainless steel.

5. A modular detachable power capacitor according to claim 4, characterized in that: The intermediate layer (211) is a high-conductivity metal layer made of silver material, which is applied to the surface of the inner layer (210).

6. A modular, detachable power capacitor according to claim 5, characterized in that: The outer layer (212) is an anti-oxidation and corrosion-resistant metal layer, which is made of nickel material and is covered on the surface of the middle layer (211).

7. A modular detachable power capacitor according to claim 2, characterized in that: The inner wall of the clamping ring (26) is adapted to the shape of the outer wall of the spring piece (21), and the inner wall of the clamping ring (26) is provided with a wear-resistant insulating coating.

8. A modular detachable power capacitor according to claim 1, characterized in that: Thermally conductive insulating adhesive is filled between the capacitor body (1) and the fixing ring (11).

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