A solid-sealed pole with upper and lower resistance power taking structure

Abstract

The application relates to the technical field of high-voltage electrical equipment, and discloses a solid-sealed pole with an upper-lower distributed resistance power-taking structure, which mainly comprises a vacuum arc-extinguishing chamber, a current transformer and a voltage transformer. A plurality of series-connected voltage sensors are arranged on the static end side of the vacuum arc-extinguishing chamber and electrically coupled with the static end of the vacuum arc-extinguishing chamber. At least one voltage sensor is arranged on the moving end side of the vacuum arc-extinguishing chamber and electrically coupled with the lower conductive part to form an upper-lower distributed voltage power-taking structure. The upper-lower distributed resistance voltage power-taking structure with series connection on the static end and single setting on the moving end can synchronously collect voltage signals of the switch in various states, the precision error is small in each state, the large sampling precision deviation of the prior art in different states is eliminated, the monitoring blind area that cannot perform data comparison is eliminated, line full-parameter voltage monitoring is realized, the sampling precision is high, and the anti-interference capability is strong.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical equipment technology, and in particular to a solid-sealed pole with an upper and lower split resistor power extraction structure. Background Technology

[0002] Solid-sealed poles are modular components that integrally encapsulate the vacuum interrupter, upper and lower conductive circuits, and transmission parts with insulating material. They are the core components of medium-voltage distribution network vacuum circuit breakers for circuit opening and closing, and insulation isolation. With the continuous advancement of distribution network primary and secondary integration technology, the requirements for the integration, intelligence, and miniaturization of solid-sealed poles are constantly increasing. These poles are required to integrate stable voltage sampling functions while fulfilling basic opening and closing functions, eliminating the need for additional independent voltage transformers. This enables full voltage monitoring of distribution network lines, supporting intelligent applications such as distribution network fault analysis and live-line maintenance.

[0003] Currently, the voltage sampling structure for solid-sealed poles can only be arranged at the stationary end of the vacuum interrupter, enabling only power supply side voltage monitoring. It is completely impossible to simultaneously acquire the voltage signal at the moving end of the vacuum interrupter. When the circuit breaker is open, the load-side line voltage cannot be monitored at all, failing to meet the core requirements of intelligent operation and maintenance of distribution networks. The moving end of the vacuum interrupter reciprocates with the opening and closing of the circuit and is under high voltage, making it impossible to arrange a stable and reliable voltage sampling structure. This results in a series of problems such as sampling signal distortion, insufficient insulation margin, and poor operational reliability. It is fundamentally impossible to achieve stable voltage monitoring at both the stationary and moving ends, failing to meet the requirements of full-scale electrical monitoring of the distribution network. Furthermore, the moving end of the vacuum interrupter needs to complete the reciprocating opening and closing motion. The conductive coupling structure between the moving end and the lower conductive circuit often adopts a Z-shaped opening structure. This structure only has a connection end face at the top, requiring a significant increase in external dimensions to meet strength and elasticity requirements. This results in a large overall volume and occupys a lot of space, which is detrimental to the miniaturization design of solid-sealed poles. Simultaneously, long-term exposure to reciprocating mechanical stress makes it prone to structural fatigue, deformation, and even fracture, leading to conductive circuit failure and seriously threatening the operational reliability of the equipment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a solid-sealed electrode with a split-type resistor power extraction structure, enabling split-type voltage sampling of the moving and stationary ends of the vacuum interrupter. At the same time, it optimizes the connection structure of the moving end, improves conductivity stability, structural flexibility and assembly adaptability, and ensures long-term stable operation of the solid-sealed electrode.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A solid-sealed pole with a split-type resistive power extraction structure mainly includes a vacuum interrupter, a current transformer, and a voltage transformer. Multiple voltage sensors are arranged in series on the upper stationary end side of the vacuum interrupter, and these voltage sensors are electrically coupled to the stationary end of the vacuum interrupter. At least one voltage sensor is arranged on the lower moving end side of the vacuum interrupter, and this voltage sensor is electrically coupled to a lower conductive component, forming a split-type voltage extraction structure. A connector is provided between the moving end of the vacuum interrupter and the lower conductive component to achieve a good electrical connection between the moving end and the lower conductive component.

[0006] Furthermore, the connector is a U-shaped structure with an internal cavity, and the two sides of the connector are arc-shaped elastic sides. Both the upper and lower ends of the connector are provided with flat connection end faces. The U-shaped cavity and arc-shaped sides enhance the elasticity of the connector, adapt to assembly errors and small displacements, and the flat end faces increase the contact area, reduce contact resistance, and ensure stable conductivity. Moreover, the U-shaped structure is smaller in size, more compact in structure, occupies less installation space, and is more suitable for the miniaturization requirements of solid-sealed poles.

[0007] Furthermore, two voltage sensors are connected in series on the stationary end side, and one voltage sensor is connected on the moving end side. The two series-connected stationary end voltage sensors can achieve voltage division sampling, improving sampling accuracy, while the single moving end voltage sensor can collect the moving end voltage. Together, they achieve full-dimensional monitoring and avoid sampling errors.

[0008] Furthermore, the lower conductive component is a conductive rod. The voltage sensor located on the moving end side of the vacuum interrupter is electrically coupled to the conductive rod. As the core conductive component, the conductive rod can stably transmit current. The sensor is electrically coupled to it, which can accurately collect the stationary end and line voltage signals, ensuring sampling stability.

[0009] Furthermore, it also includes an upper support rod and a lower support rod, with one of the voltage sensors located on the stationary end side of the vacuum interrupter being installed at the upper end of the upper support rod, and the voltage sensor located on the moving end side of the vacuum interrupter being installed at the upper end of the lower support rod.

[0010] Furthermore, the connector has a through hole for the connecting end to pass through. The through hole and the connecting end cooperate to achieve a firm connection between the connector and the moving end of the vacuum interrupter, while ensuring smooth passage and facilitating assembly and subsequent maintenance.

[0011] Furthermore, it also includes a mounting plate and an insulating pull rod. One end of the conductive rod is fixedly mounted on the mounting plate, the connector is fixedly mounted on the mounting plate, and the bottom end of the insulating pull rod is connected to the mechanism. The control switch performs opening and closing actions according to the instructions from the background.

[0012] Furthermore, it also includes a cover, which is placed above the mounting plate and has an opening for the stationary end of the vacuum interrupter to pass through. The cover can shield the electric field concentration of the connector, suppress tip discharge, and at the same time block dust and debris, protect the connector, and extend its service life.

[0013] Furthermore, the upper end of the insulating pull rod is provided with a connecting end, and the mounting plate is provided with a through hole. The connecting end of the connecting end passes through the through hole and the through hole of the connector in sequence, and is connected to the moving end of the vacuum interrupter. The connecting end is connected in series with each component, which not only ensures a firm mechanical connection, but also assists in the conduction of current. The through hole and the through hole are coaxially arranged to avoid assembly jamming.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention employs a static-end series-connected and dynamic-end-separated resistor-type voltage extraction structure, which can synchronously acquire voltage signals from the switch in various states. The accuracy error is small in each state, eliminating the monitoring blind spots caused by large sampling accuracy deviations in existing technologies under different states, making data comparison impossible. This enables full-parameter voltage monitoring of the line, with high sampling accuracy and strong anti-interference capabilities. The U-shaped connector with an internal cavity and arc-shaped elastic side is smaller and more compact than traditional connectors, effectively reducing installation space and meeting the miniaturization and integration design requirements of solid-sealed poles. It possesses excellent elastic deformation capability, buffering the assembly stress and reciprocating mechanical stress generated by the opening and closing of the vacuum interrupter, avoiding structural fatigue, deformation, and fracture, significantly improving the reliability and service life of the conductive circuit. The flat connection surfaces at both ends of the connector increase the contact area, effectively reducing contact resistance and preventing local overheating and conductivity interruption caused by poor contact, ensuring long-term stability of the conductive path. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of part of the structure of the present invention; Figure 3 This is a structural view of the connector of the present invention; Figure 4 This is a structural view of the conductive rod of the present invention; Figure 5 This is an installation view of the insulating outer casing of the present invention.

[0017] Drawing number descriptions: 1. Vacuum interrupter; 2. Cover; 3. Conductive rod; 31. Mounting plate; 32. Through hole; 4. Connector; 41. Through hole; 42. Cavity; 43. Connecting end face; 44. Elastic side; 5. Insulating pull rod; 51. Connecting end; 6. Current sensor; 7. Fixed support rod; 8. Voltage sensor; 9. Upper support rod; 10. Lower support rod; 11. Insulating shell. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0020] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] Example: Please see Figure 1-5 A solid-sealed pole with a split-resistance power extraction structure includes a vacuum interrupter 1. The vacuum interrupter 1 is the core component for circuit switching. Its upper end is the stationary end and its lower end is the moving end. Two voltage sensors 8 are arranged in series on the stationary end side of the upper end of the vacuum interrupter 1. The voltage sensors 8 are electrically coupled to the stationary end of the vacuum interrupter 1. The voltage signal acquisition on the stationary end side is completed through the series arrangement. The series arrangement of voltage sensors 8 can realize voltage division sampling, improve the accuracy and stability of voltage sampling, and avoid the problem of excessive sampling error of a single sensor. The system also includes an upper support rod 9 and a lower support rod 10. One of the voltage sensors 8 on the upper stationary side is fixedly installed on the upper end of the upper support rod 9, which provides support and stability to the voltage sensor 8. A voltage sensor 8 is located on the lower moving end side of the vacuum interrupter 1, installed on the upper end of the lower support rod 10, which provides stable support. The voltage sensor 8 on the moving end side is electrically coupled to the conductive rod 3 below. The conductive rod 3, as the core conductive component of the solidified electrode, transmits the circuit current. The voltage sensor 8 on the moving end side acquires the voltage signal on the moving end side through electrical coupling with the conductive rod 3. A mounting housing can be installed below the upper support rod 9 and the lower support rod 10 for support and fixation. To achieve stable support for the voltage sensor 8, a complete split-type voltage power collection structure is formed by the cooperation of the series voltage sensor 8 at the stationary end and the independent voltage sensor 8 at the moving end. This structure can simultaneously collect voltage signals from both sides of the arc-extinguishing chamber, enabling full parameter monitoring of the line. This solves the problem that the single-side sampling of existing technologies cannot cover the voltage monitoring of the load side, and meets the needs of smart grids for comprehensive monitoring of electrical parameters. At the same time, the split-type layout can avoid mutual interference between sensors and further improve sampling accuracy.

[0023] A connector 4 is provided between the moving end of the vacuum interrupter 1 and the lower conductive rod 3. The connector 4 acts as a flexible connection, achieving flexible conductive coupling between the moving end and the conductive component, avoiding assembly stress and operational damage caused by rigid connections. It also buffers vibrations generated during the operation of the vacuum interrupter 1, reducing the impact of vibrations on the overall structure. The connector 4 is a loop-shaped structure with an internal cavity 42. Compared to traditional structures, the loop-shaped closed structure is smaller and more compact, without occupying additional installation space. The loop-shaped structure with its connecting ends, combined with the internal hollow cavity 42, provides ample deformation space for the connector 4. The hollow cavity 42 not only enhances the elastic deformation capacity of the connector 4 but also reduces its overall weight, lowering the load-bearing pressure on the conductive rod 3. Furthermore, it facilitates heat dissipation, preventing the connector 4 from becoming too long. The heat generated during the period of conduction is accumulated; the two sides of the connector 4 are set as arc-shaped elastic sides 44. The arc structure can further improve the elastic deformation capability of the connector 4. During the assembly and operation of the solid-sealed pole, it can adapt to the displacement and assembly error of the moving end, and always maintain the continuity of conductive coupling. At the same time, the arc structure can avoid sharp corners at the edge of the structure and reduce the phenomenon of electric field concentration. Both the upper and lower ends of the connector 4 are provided with flat connection end faces 43. The upper connection end face 43 is in close contact with the lower end of the vacuum interrupter 1, and the lower connection end face 43 is in close contact with the mounting plate 31. The flat end face can greatly increase the contact area, reduce the contact resistance, avoid the problem of local overheating and conduction interruption due to poor contact, and ensure the stability of the conductive path. At the same time, the close contact can improve the firmness of the connection and prevent the connector 4 from falling off.

[0024] A mounting plate 31 is integrally fixed to one end of the conductive rod 3. The mounting plate 31 provides a fixed installation base for the connector 4. The connector 4 is stably installed on the mounting plate 31. The integrally fixed mounting plate 31 and conductive rod 3 can prevent loosening of the connection and improve the overall structural integrity. At the same time, the mounting plate 31 can increase the installation area of ​​the connector 4, further improving the installation stability of the connector 4. An insulating pull rod 5 is installed below the mounting plate 31. The bottom end of the insulating pull rod 5 is connected to the mechanism through an adjusting joint to accurately execute the instructions of the background controller and realize the opening and closing action of the switch. At the same time, it avoids electrical breakdown between the conductive parts and the mounting housing below, ensuring the safe operation of the equipment. Moreover, the insulating pull rod 5 is made of high-strength insulating material, which can withstand large mechanical operating forces and ensure the reliable operation of the switchgear.

[0025] The upper end of the insulating rod 5 is fixedly provided with a connecting end 51. A through hole 32 is opened on the mounting plate 31, and a through hole 41 is opened on the connector 4. The connecting end of the connecting end 51 passes through the through hole 32 of the mounting plate 31 and the through hole 41 of the connector 4 in sequence, and is finally fixedly connected to the moving end of the vacuum interrupter 1. The mechanical connection between the connector 4 and the lower end of the vacuum interrupter 1 is realized through the connecting end 51. At the same time, in conjunction with the conductivity of the connector 4, the electrical path is completed. The coaxial setting of the through hole 41 and the through hole 32 ensures that the connecting end 51 passes through smoothly and avoids assembly jamming. It also facilitates disassembly and maintenance in the later stage. The connecting end 51 is made of high-strength conductive material, which not only ensures the firmness of the mechanical connection, but also helps to conduct current and improves the stability of the conductive path.

[0026] A cover 2 is provided above the mounting plate 31. The cover 2 has an opening, through which the stationary end of the vacuum interrupter 1 passes through the cover 2. The cover 2 completely covers the connector 4 inside. On the one hand, it can shield the electric field concentration at the edges and corners of the connector 4, suppress tip discharge and partial discharge, improve the insulation safety inside the solid-sealed electrode, and avoid the aging and breakdown of the insulation material caused by discharge. On the other hand, it can prevent external dust and debris from adhering to the surface of the connector 4, avoiding affecting the conductivity and deformation performance. At the same time, it can prevent external collisions from damaging the connector 4 and extend the service life of the connector 4. The structure of the cover 2 is compatible with the internal components, without occupying additional space, and is suitable for the miniaturization design requirements of the solid-sealed electrode.

[0027] A fixed support rod 7 is also fixedly installed on the lower mounting housing. A current sensor 6 is installed on the upper end of the fixed support rod 7. The current sensor 6 is sleeved on the conductive rod 3 and is used to collect the line current signal of the conductive rod 3. As a conventional monitoring component of the solidified pole, it works in conjunction with the voltage sampling system to achieve comprehensive monitoring of electrical parameters and provide complete data support for intelligent operation and maintenance. An insulating shell 11 is installed on the lower mounting housing. The insulating shell 11 covers and seals the entire structure, including the vacuum interrupter 1, voltage sensor 8, connector 4, and conductive rod 3, forming a complete solidified pole. This improves the insulation performance and protection level of the overall structure and prevents personnel from accidentally touching live parts, thus improving the safety of equipment use.

[0028] The working process of this solid-sealed pole is as follows: the vacuum interrupter 1 performs the opening and closing action of the circuit. The voltage sensor 8 connected in series on the stationary end side collects the voltage signal of the moving end of the interrupter in real time. The voltage sensor 8 on the moving end side collects the voltage signal of the stationary end of the interrupter and the conductive rod 3 side in real time, realizing the power extraction and voltage monitoring of the upper and lower separated resistors. The sampling signal is stable and accurate, and can provide real-time feedback on the line operation status. The current sensor 6 synchronously collects the current signal of the conductive rod 3, completing the comprehensive monitoring of electrical parameters.

[0029] During operation, the displacement and assembly stress generated at the moving end of the vacuum interrupter 1 are buffered by the deformation of the cavity 42 and the arc-shaped elastic side 44 of the connector 4. The connector 4 always maintains stable contact with the lower end of the vacuum interrupter 1 and the mounting plate 31, ensuring unobstructed conductive path. The cover 2 continuously shields the electric field concentration of the connector 4, eliminating the risk of tip discharge. The insulating rod 5 ensures the insulation performance between components. The overall structure operates stably without conductive failure, insulation fault, or sampling distortion. It can maintain good working performance for a long time. At the same time, the components are assembled compactly and the layout is reasonable, which can effectively reduce the overall volume of the solid-sealed pole and adapt to the needs of different installation scenarios.

[0030] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A solid-sealed electrode post with a split-type resistor power extraction structure, characterized in that, Including a vacuum interrupter (1); Multiple voltage sensors (8) are arranged in series on the upper static end side of the vacuum interrupter (1), and the voltage sensors (8) on the upper static end side are electrically coupled to the static end of the vacuum interrupter (1). At least one voltage sensor (8) is arranged on the lower moving end side of the vacuum interrupter (1). The voltage sensor (8) on the lower moving end side is electrically coupled to the conductive component below to form a voltage extraction structure with the upper and lower parts placed separately. A connector (4) is provided between the moving end of the vacuum interrupter (1) and the conductive component below it. The connector (4) is used to achieve a good electrical connection between the moving end and the conductive component below it.

2. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 1, characterized in that, The connector (4) is a U-shaped structure with an internal cavity (42), and the two sides of the connector (4) are arc-shaped elastic sides (44). The upper and lower ends of the connector (4) are provided with flat connecting end faces (43).

3. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 1, characterized in that, The vacuum interrupter (1) has two voltage sensors (8) connected in series on the stationary side, and one voltage sensor (8) on the moving side of the vacuum interrupter (1).

4. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 1, characterized in that, The lower conductive component is a conductive rod (3), and the voltage sensor (8) located on the moving end side of the vacuum interrupter (1) is electrically coupled to the conductive rod (3).

5. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 3, characterized in that, It also includes an upper support rod (9) and a lower support rod (10). One of the voltage sensors (8) located on the stationary side of the vacuum interrupter (1) is installed on the upper end of the upper support rod (9), and the voltage sensor (8) located on the moving side of the vacuum interrupter (1) is installed on the upper end of the lower support rod (10).

6. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 5, characterized in that, The connector (4) has a through hole (41).

7. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 4, characterized in that, It also includes a mounting plate (31) and an insulating rod (5). One end of the conductive rod (3) is fixedly mounted on the mounting plate (31), the connector (4) is fixedly mounted on the mounting plate (31), and the insulating rod (5) is supported below the mounting plate (31).

8. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 7, characterized in that, It also includes a cover (2), which is placed above the mounting plate (31) and has an opening for the moving end of the vacuum interrupter (1) to pass through.

9. A solid-sealed electrode post with an upper and lower split resistor power extraction structure according to claim 7, characterized in that, The upper end of the insulating pull rod (5) is provided with a connecting end (51), and the mounting plate (31) is provided with a through hole (32). The connecting end (51) passes through the through hole (32) and the through hole (41) of the connector (4) in sequence, and is connected to the moving end of the vacuum interrupter (1).

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