An assembly structure with built-in electrode column

Abstract

This utility model discloses an assembly structure for easy integration of the electrode post, including an upper terminal block, a vacuum interrupter, a silicone layer for the interrupter, epoxy resin for the electrode post, a current transformer, a lower terminal block, a flexible connection, a silicone rubber layer for the electrode post, an insulating tie rod, and a capacitor module. This patent optimizes the structure by embedding key components such as the vacuum interrupter, upper terminal block, and lower terminal block inside the epoxy resin of the electrode post into a single integrated structure, achieving a high degree of equipment integration. This design not only reduces the size of the equipment but also lowers costs and improves installation and maintenance efficiency. By covering the outer wall of the vacuum interrupter with a silicone layer for the interrupter and the outer wall of the electrode post epoxy with a silicone rubber layer for the electrode post, the insulation performance of the equipment is significantly improved. This design helps prevent safety accidents caused by insulation failures during operation, thus improving the safety of the entire power system.

Description

Technical Field

[0001] This utility model relates to the field of built-in electrode post technology, specifically to an assembly structure that facilitates the built-in electrode post. Background Technology

[0002] In traditional pole-mounted vacuum circuit breaker applications, current transformers and voltage transformers are usually required externally to ensure stable operation of the equipment. However, traditional transformers have significant problems such as large size, high cost, and complex wiring. These problems not only increase the difficulty of equipment installation and maintenance costs, but also make the equipment more susceptible to the influence of the operating environment, such as temperature, humidity, and dust, thus limiting the development of distribution network automation. In addition, the low level of standardization and integration of traditional primary and secondary equipment leads to many inconveniences in the installation, commissioning, and maintenance of the equipment. This not only affects the operating efficiency of the equipment, but also increases the risk of equipment failure and reduces the reliability of the entire power system.

[0003] Therefore, improving the standardization and integration of primary and secondary equipment has become the key to enhancing the operational stability of power distribution equipment and the development of power distribution network automation. Thus, we need to propose an assembly structure that facilitates the integration of electrode terminals. Utility Model Content

[0004] The purpose of this invention is to provide an assembly structure that facilitates the internal installation of electrode posts, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An assembly structure for easy internal electrode post assembly includes an upper terminal block, a vacuum interrupter, a silicone layer for the interrupter, epoxy resin for the electrode post, a current transformer, a lower terminal block, a flexible connection, a silicone rubber layer for the electrode post, an insulating pull rod, and a capacitor module. The silicone layer for the interrupter covers the outer wall of the vacuum interrupter. The stationary end of the vacuum interrupter is connected to the upper terminal block, and the moving end of the vacuum interrupter is connected to the lower terminal block via a flexible connection.

[0007] The silicone layer of the arc-extinguishing chamber, the upper terminal and the lower terminal are all cast inside the epoxy pole, and the flexible connection is fixed to the vacuum arc-extinguishing chamber by an insulating tie rod. An installation groove is opened on the epoxy pole, and the capacitor module is installed in the installation groove. The current transformer and the epoxy pole are integrally formed by the casting process, and the silicone rubber layer of the pole is covered on the outer wall of the epoxy pole.

[0008] Preferably, the bottom of the epoxy pole has a pull rod groove, and the insulating pull rod is located inside the pull rod groove.

[0009] Preferably, it also includes a lead wire, wherein the capacitor module is electrically connected to the upper terminal block via the lead wire and is cast inside the epoxy column.

[0010] Preferably, the epoxy pole has a side channel on one side of the tie rod groove, and the secondary wire of the current transformer is led out of the pole through the side channel.

[0011] Preferably, it also includes a first screw, wherein the upper terminal is fixedly installed to the stationary end of the vacuum interrupter by the first screw.

[0012] Preferably, it also includes a second screw, through which the flexible connection is fixedly installed to the lower terminal block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through this patent, optimizes the key components such as the vacuum interrupter, upper terminal, and lower terminal into an integrated structure by casting them into the epoxy core of the electrode column, thereby achieving a high degree of equipment integration. This design not only reduces the size of the equipment but also lowers the cost and improves the installation and maintenance efficiency of the equipment.

[0015] 2. This utility model significantly improves the insulation performance of the equipment by covering the outer wall of the vacuum interrupter with a silicone layer and the outer wall of the pole with an epoxy silicone rubber layer. This design helps prevent safety accidents caused by insulation failures during equipment operation and improves the safety of the entire power system. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention viewed from the front;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a side view of the three-dimensional structure of the present invention.

[0019] In the diagram: 1. Upper terminal block; 2. First screw; 3. Vacuum interrupter; 4. Silicone layer of interrupter; 5. Epoxy pole; 6. Current transformer; 61. Side channel; 7. Lower terminal block; 8. Second screw; 9. Flexible connection; 10. Silicone rubber layer of pole; 11. Insulating pull rod; 12. Capacitor module; 121. Cable take-off. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-3 This utility model provides a technical solution:

[0022] An assembly structure for easy internal electrode post assembly includes an upper terminal block 1, a vacuum interrupter 3, a silicone layer for the interrupter 4, epoxy resin for the electrode post 5, a current transformer 6, a lower terminal block 7, a flexible connection 9, a silicone rubber layer for the electrode post 10, an insulating pull rod 11, and a capacitor module 12. The silicone layer for the interrupter 4 covers the outer wall of the vacuum interrupter 3. The stationary end of the vacuum interrupter 3 is connected to the upper terminal block 1, and the moving end of the vacuum interrupter 3 is connected to the lower terminal block 7 through the flexible connection 9.

[0023] Among them, the silicone layer 4 of the arc-extinguishing chamber is made of silicone rubber material with high elasticity and high insulation performance. It is tightly attached to the outer wall of the vacuum arc-extinguishing chamber 3 through hot pressing molding process, which can effectively isolate external moisture, dust and other impurities and protect the insulation performance of the vacuum arc-extinguishing chamber 3; the flexible connection 9 is made of copper braided tape material, which has good flexibility and can ensure stable current transmission when the vacuum arc-extinguishing chamber 3 is opened and closed, and avoid loosening of the connection due to mechanical vibration.

[0024] The silicone layer 4 of the arc-extinguishing chamber, the upper terminal 1 and the lower terminal 7 are all cast inside the epoxy pole 5, and the flexible connection 9 is fixedly installed to the vacuum arc-extinguishing chamber 3 by the insulating tie rod 11. An installation groove is opened on the epoxy pole 5, and the capacitor module 12 is installed in the installation groove. The current transformer 6 and the epoxy pole 5 are integrally formed by the casting process, and the silicone rubber layer 10 of the pole is covered on the outer wall of the epoxy pole 5.

[0025] During the casting process, a vacuum casting process is adopted to inject the epoxy 5 material of the electrode post into the mold under a vacuum environment, so that the silicone layer 4 of the arc-extinguishing chamber, the terminal block and other components are completely wrapped with epoxy resin, eliminating internal air gaps and improving the overall insulation strength. The insulating tie rod 11 is made of high-strength epoxy resin. One end of it is fixed to the moving end of the vacuum arc-extinguishing chamber 3 by a pin, and the other end is connected to the operating mechanism. While achieving electrical insulation, it can reliably transmit the opening and closing operating force. The dimensions of the mounting slot of the capacitor module 12 are precisely designed to fit tightly with the capacitor module 12. After installation, it is filled with insulating sealant to ensure that the capacitor module 12 is stable and its electrical performance is not affected. The silicone rubber layer 10 of the electrode post is covered with the outer wall of the epoxy 5 of the electrode post through an extrusion molding process to form an outer insulating layer that is resistant to flashover and aging. The vacuum casting process and integrated molding design make the electrode post structure compact, reduce the risk of partial discharge and improve insulation performance.

[0026] In an optional embodiment: a tie rod groove is provided at the bottom of the epoxy pole 5, and the insulating tie rod 11 is located inside the tie rod groove.

[0027] It should be noted that the shape of the pull rod groove matches the insulating pull rod 11, and its inner wall is finely polished to meet the surface roughness requirements. This ensures smooth sliding of the insulating pull rod 11 while reducing frictional loss. The depth and length of the pull rod groove are precisely designed according to the opening and closing stroke of the vacuum interrupter 3 to ensure that the insulating pull rod 11 will not interfere with the epoxy pole 5 during movement, and to provide good guidance and support for the insulating pull rod 11.

[0028] In an optional embodiment, a take-off wire 121 is also included, through which the capacitor module 12 is electrically connected to the upper terminal 1 and is cast inside the epoxy column 5.

[0029] It should be noted that the take-up wire 121 is made of high-temperature resistant, high-insulation fluoroplastic insulated wire, and its wire diameter is reasonably selected according to the working current of the capacitor module 12 to ensure that the current carrying capacity meets the requirements. Before casting, the take-up wire 121 is electrically connected to the capacitor module 12 and the upper terminal 1 by crimping, and sealed with insulating heat shrink tubing to prevent epoxy resin from seeping into the connection part during the casting process and affecting the electrical performance. The wiring of the take-up wire 121 inside the epoxy column 5 has been optimized to avoid collision or compression with other components. The design of the take-up wire 121 realizes a reliable electrical connection between the capacitor module 12 and the upper terminal 1. The sealing and wiring optimization treatment ensures the stability and safety of the electrical connection. At the same time, the casting and fixing method makes the take-up wire 121 less susceptible to damage from external pulling, thus improving the reliability of the overall structure.

[0030] In an optional embodiment: the epoxy pole 5 is provided with a side channel 61 on one side of the tie rod groove, and the secondary wire of the current transformer 6 is led out of the pole through the side channel 61.

[0031] It should be noted that the side channel 61 has a circular cross-sectional shape, with a diameter slightly larger than the outer diameter of the secondary wire of the current transformer 6, ensuring that the secondary wire can pass through smoothly. The inside of the channel is smooth and burr-free, and a rubber sealing ring is installed at the exit point of the secondary wire to seal and protect it. The exit position of the side channel 61 is carefully designed to facilitate the connection of the secondary wire to external measurement and protection devices, and a protective sleeve is installed at the exit to prevent the secondary wire from being damaged by external mechanical forces and environmental corrosion. The design of the side channel 61 provides a convenient channel for the lead-out of the secondary wire of the current transformer 6. The sealing and protection measures ensure the insulation performance and mechanical strength of the secondary wire, facilitate the wiring and maintenance of the secondary circuit of the equipment, and improve the operability of the equipment.

[0032] In an optional embodiment, a first screw 2 is also included, and the upper terminal 1 is fixedly installed to the stationary end of the vacuum interrupter 3 by the first screw 2.

[0033] It should be noted that the first screw 2 is an M10 socket head cap screw made of high-strength stainless steel, which has good corrosion resistance. During installation, thread-locking adhesive is applied to the screw connection, and a torque wrench is used to tighten it to the specified torque to ensure a firm and reliable connection. At the same time, a spring washer and a flat washer are installed under the screw head. The spring washer prevents the screw from loosening, while the flat washer increases the contact area, making the pressure evenly distributed and avoiding damage to the surface of the components. The use of the first screw 2 and its matching parts ensures the tightness and stability of the connection between the upper terminal 1 and the stationary end of the vacuum interrupter 3. The application of thread-locking adhesive and washers effectively prevents the screw from loosening, improves the reliability of the electrical connection, and reduces the risk of failure caused by loose connection.

[0034] In an optional embodiment, a second screw 8 is also included, through which the flexible connection 9 is fixedly installed to the lower terminal 7.

[0035] It should be noted that the second screw 8 is an M8 socket head cap screw, also made of high-strength stainless steel. During installation, first place the flexible connector 9 on the connecting surface of the lower terminal 7, then pass the second screw 8 through the connecting hole between the flexible connector 9 and the lower terminal 7, and then install the flat washer and spring washer in sequence. Finally, tighten with a torque wrench. To ensure good electrical contact between the flexible connector 9 and the lower terminal 7, apply conductive grease to the connecting surface to reduce contact resistance. The installation method of the second screw 8 ensures a firm mechanical connection and good electrical contact between the flexible connector 9 and the lower terminal 7. The use of conductive grease reduces contact resistance, reduces heat generation, and improves the safety and reliability of equipment operation.

[0036] Working principle: When this utility model is in use, the current flows in from the upper terminal 1 and is transmitted to the stationary end of the vacuum interrupter 3. Inside the vacuum interrupter 3, after the current is extinguished, it flows out from the moving end and is transmitted to the lower terminal 7 through the fixed connection of the flexible connector 9 and the second screw 8, thus completing the current transmission process. The vacuum interrupter 3 is the core arc extinguishing element. When the current is interrupted, an electric arc is generated inside it. Because the vacuum interrupter 3 is in a high vacuum state, the electric arc spreads and is extinguished rapidly in the vacuum environment, thereby achieving a highly efficient arc extinguishing function and protecting the equipment from electric arc damage. The silicone layer 4 of the interrupter chamber covers the outer wall of the vacuum interrupter 3, providing additional insulation protection to prevent current leakage and external interference. The epoxy 5 of the pole post is used as the main shell material to cast the upper terminal 1, the lower terminal 7, and the silicone layer 4 of the interrupter chamber, forming a robust and insulating shell structure, further protecting the internal components from the influence of the external environment.

[0037] The silicone rubber layer 10 of the electrode post is wrapped around the outer wall of the epoxy electrode post 5, providing additional protection against moisture, dust and corrosion, and extending the service life of the equipment. The capacitor module 12 is installed in the mounting groove opened on the epoxy electrode post 5 and is electrically connected to the upper terminal 1 through the take-up wire 121, realizing real-time monitoring and signal acquisition of the equipment's operating status. The current transformer 6 is integrally formed with the epoxy electrode post 5 through a casting process. Its secondary wire is led out of the electrode post through the side channel 61 opened on the side of the epoxy electrode post 5, realizing stable transmission of current signals, which facilitates remote monitoring and fault diagnosis of the equipment. The flexible connection 9 is fixedly installed with the vacuum interrupter 3 through the insulating tie rod 11. The insulating tie rod 11 is located inside the tie rod groove opened at the bottom of the epoxy electrode post 5, providing stable mechanical support and preventing the components from loosening and displacement during operation.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An assembly structure for facilitating the internal installation of electrode posts, characterized in that, The device includes an upper terminal block (1), a vacuum interrupter (3), a silicone layer for the interrupter (4), epoxy resin for the pole (5), a current transformer (6), a lower terminal block (7), a flexible connection (9), a silicone rubber layer for the pole (10), an insulating pull rod (11), and a capacitor module (12). The silicone layer for the interrupter (4) covers the outer wall of the vacuum interrupter (3). The stationary end of the vacuum interrupter (3) is connected to the upper terminal block (1), and the moving end of the vacuum interrupter (3) is connected to the lower terminal block (7) through the flexible connection (9). The silicone layer (4) of the arc-extinguishing chamber, the upper terminal (1) and the lower terminal (7) are all cast inside the epoxy pole (5), and the flexible connection (9) is fixedly installed with the vacuum arc-extinguishing chamber (3) by the insulating tie rod (11). An installation groove is opened on the epoxy pole (5), and the capacitor module (12) is installed in the installation groove. The current transformer (6) and the epoxy pole (5) are integrally formed by the casting process, and the silicone rubber layer (10) of the electrode pole is covered on the outer wall of the epoxy pole (5).

2. The assembly structure for facilitating the internal installation of electrode posts according to claim 1, characterized in that: The bottom of the epoxy pole (5) is provided with a pull rod groove, and the insulating pull rod (11) is located inside the pull rod groove.

3. The assembly structure for facilitating the internal installation of electrode posts according to claim 1, characterized in that: It also includes a take-off wire (121), the capacitor module (12) is electrically connected to the upper terminal (1) through the take-off wire (121) and is poured into the epoxy column (5).

4. The assembly structure for facilitating the internal installation of electrode posts according to claim 2, characterized in that: The epoxy pole (5) has a side channel (61) on one side of the tie rod groove, and the secondary wire of the current transformer (6) is led out of the pole through the side channel (61).

5. The assembly structure for facilitating the internal installation of electrode posts according to claim 1, characterized in that: It also includes a first screw (2), and the upper terminal (1) is fixedly installed to the stationary end of the vacuum interrupter (3) by the first screw (2).

6. The assembly structure for facilitating the internal installation of electrode posts according to claim 1, characterized in that: It also includes a second screw (8), through which the flexible connection (9) is fixedly installed to the lower terminal (7).

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