Wind energy circuit breaker pole

Abstract

The utility model discloses a wind energy circuit breaker pole, which comprises an insulator, a vacuum arc-extinguishing chamber, a conducting rod and a high-voltage sensor, the insulator comprises an upper connecting seat, a positioning disc and a lower connecting seat which are integrally formed, the upper connecting seat is arranged at the upper part of the insulator, and the middle part of the insulator protrudes outwards to be provided with the rectangular positioning disc; the lower connecting seat is arranged below the positioning disc, a vacuum arc-extinguishing chamber is arranged in the lower connecting seat, a fixed contact is arranged at the bottom of the vacuum arc-extinguishing chamber, a conducting rod is arranged at the core part of the insulator, the high-voltage sensor is arranged in the positioning disc, the high-voltage sensor comprises a shielding ring, a hollow conducting tube and an embedded nut, and the shielding ring is arranged on the outer side of the conducting rod and is coaxial with the conducting rod; a plurality of hollow conductive tubes are vertically welded to the outer side of the shielding ring and extend outwards along the inner layer of the positioning disc, embedded nuts are vertically welded to the hollow conductive tubes, and the upper end face of each embedded nut is flush with the upper surface of the positioning disc; the circuit breaker pole has the advantages of being high in strength and good in electric conduction and heat dissipation performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to a pole of a wind energy circuit breaker. Background Art

[0002] The wind power industry has experienced rapid growth in recent years. However, due to the unique characteristics of wind energy and the complexity of the wind power generation environment, its electrical systems differ significantly from conventional hydropower and thermal power systems. Wind energy is characterized by randomness, uncontrollability, and the requirement for safe grid-connected operation. Furthermore, wind turbines are often installed and operated in harsh environments such as high altitude, high latitude, and near-shore humidity. Therefore, the performance and reliability requirements for components in these systems are higher than those for conventional hydropower and thermal power systems.

[0003] The voltage transformer of a sealed pole converts the high-voltage side voltage into a low-voltage signal on the insulator to facilitate the protection, control, metering, and detection of electrical equipment. For example, patent application number CN2023229497568 discloses a sealed pole. The conductive pole is embedded in an insulating cylinder and connected to a grading ring via a wire. External detection equipment senses the internal voltage by connecting to the conductive pole. This flexible connection method has the disadvantages of unstable contact, difficult assembly, and poor rectification effect. It is not suitable for use in harsh wind power environments. Therefore, the existing technology needs to be improved. Summary of the Invention

[0004] In response to the above problems and technical requirements, the utility model provides a wind power circuit breaker pole, in which the shielding ring and the voltage transformer are integrated into one in the sealed pole and encapsulated in an insulator. It has good structural stability and good rectification effect, is suitable for mass production and use, and has strong economic benefits.

[0005] The technical solution of the utility model is as follows: a wind energy circuit breaker pole, comprising an insulator, a vacuum interrupter, a conductive rod and a high-voltage sensor, the insulator comprising an integrally formed upper connecting seat, a positioning plate and a lower connecting seat, the upper connecting seat being arranged on the upper part of the insulator, a rectangular positioning plate protruding outward from the middle part of the insulator, the lower connecting seat being arranged below the positioning plate, a vacuum interrupter being arranged in the lower connecting seat, a fixed contact being arranged at the bottom of the vacuum interrupter, a conductive rod being arranged at the core of the insulator, the upper end of the conductive rod being exposed from the top of the upper connecting seat and the lower end being extended into the vacuum interrupter, the conductive rod being able to move up and down in the insulator to connect or disconnect with the fixed contact; the high-voltage sensor being arranged in the positioning plate, the high-voltage sensor comprising a shielding ring, a hollow conductive tube and an embedded nut, the shielding ring being arranged coaxially with the conductive rod on the outside of the conductive rod, a plurality of hollow conductive tubes being vertically welded to the outside of the shielding ring, the hollow conductive tubes extending outward along the middle layer of the positioning plate, the embedded nuts being vertically welded to the hollow conductive tubes, the upper end surface of each embedded nut being flush with the upper surface of the positioning plate. In the above scheme, the shielding ring itself has the function of shielding the conductive rod from corona and preventing current breakdown. By welding a hollow conductive tube and an embedded nut on the outside of the shielding ring, a high-voltage sensor is formed, which can sense the high voltage inside the insulator and take on the functions of voltage measurement and protection. The integrated structure has a compact size, good mechanical strength and better stability in use.

[0006] Furthermore, the shielding ring is a metal mesh structure, and the upper and lower ends of the shielding ring are provided with outwardly curled flanges. The flanges guide the electric field and prevent the electric field from concentrating at the two ends of the shielding ring and causing local breakdown.

[0007] Furthermore, the insert nut has threads on its inner wall and knurling on its outer surface. The upper end of the insert nut is flat, while the lower end is spherical. The lower end of the insert nut is welded to the upper side of the hollow conductive tube. The internal threads of the insert nut can be connected to the terminals of external measuring equipment, while the knurling on the outer surface enhances the bonding strength with the insulator, making the insert nut more effective.

[0008] Furthermore, the inner end of the hollow conductive tube is welded to the shielding ring, and the outer end is located on the side of the positioning plate and sealed with a rivet. Multiple hollow conductive tubes are welded at equal angles around the shielding ring within the positioning plate. Some of these hollow conductive tubes are welded with embedded nuts, while others are not. Providing a greater number of hollow conductive tubes than embedded nuts increases heat dissipation channels, enhancing heat dissipation while not affecting voltage sensing.

[0009] Furthermore, the insulator is cured and connected with epoxy resin to form an integrated structure, and the high-voltage sensor is entirely encapsulated in the epoxy resin. The epoxy resin has an excellent isolation effect on the high-voltage sensor and the vacuum interrupter, and the insulator is not affected by external dirt and moisture, with good insulation performance and high stability.

[0010] Furthermore, a fixed connection base is provided at the bottom of the lower connection base, and the fixed connection base is an inverted U-shaped structure.

[0011] Furthermore, a positioning pin is embedded in the top surface of the upper connecting base, and the positioning pin is made of metal.

[0012] Beneficial effects of the utility model:

[0013] 1) In the sealed pole, the shielding ring and voltage transformer are integrated into an integrated high-voltage sensor. This high-voltage sensor not only serves as the shielding ring, eliminating the electric field generated when the conductive rod is closed and opened, avoiding breakdown or discharge due to concentrated electric field, but also serves as the voltage transformer. Through the connection of external measuring equipment and the embedded nut, it can detect and control the internal high voltage. The integrated structure has greater mechanical strength and is not easily damaged, making the sealed pole more compact.

[0014] 2) The shielding ring, hollow conductive tube and embedded nut of the high-voltage sensor are all connected by welding, which does not require a special mold, is economical and saves costs. Compared with flexible connections, rigid connections have stable contact, good rectification effect, good conductivity, and higher precision and accuracy in voltage mutual inductance detection;

[0015] 3) The hollow conductive tube extends from the shielding ring to the positioning plate. Due to its hollow structure, the hollow conductive tube also assumes the function of heat dissipation. The channel inside the tube is the heat dissipation channel, which can dissipate the internal heat to the outside. The metal tube body itself is conductive, so it does not affect heat dissipation while conducting electricity, thereby extending the service life of this sealed pole in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of the pole of the wind energy circuit breaker of the present utility model;

[0017] Figure 2 This is a front view of the pole of the wind energy circuit breaker of the utility model;

[0018] Figure 3 for Figure 2 Cross-section of the middle AA;

[0019] Figure 4 It is a cross-sectional view of the shielding net and the hollow conductive tube in the utility model;

[0020] Figure 5 This is a top view of the shielding net and the hollow conductive tube in the utility model;

[0021] Figure 6 This is a structural diagram of the embedded nut in the utility model;

[0022] Marked in the figure are: insulator 1, upper connecting seat 11, positioning plate 12, lower connecting seat 13, fixed connecting seat 131, conductive rod 2, high-voltage sensor 3, shielding ring 31, flange 311, hollow conductive tube 32, rivet 321, embedded nut 33, thread 331, knurling 332, vacuum interrupter 4, and positioning pin 5. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-6 The figure shows a pole of a wind energy circuit breaker of the present invention, comprising an insulator 1, a vacuum interrupter 4, a conductive rod 2 and a high-voltage sensor 3. The insulator 1 comprises an integrally formed upper connecting seat 11, a positioning plate 12 and a lower connecting seat 13. The upper connecting seat 11 is arranged on the upper part of the insulator 1, and a rectangular positioning plate 12 protrudes outward from the middle part of the insulator 1. The lower connecting seat 13 is arranged below the positioning plate 12. A vacuum interrupter 4 is arranged in the lower connecting seat 13, and a fixed contact (not shown in the figure) is arranged at the bottom of the vacuum interrupter 4. A conductive rod 2 is provided at the core of the insulator, the upper end of the conductive rod 2 is exposed from the top of the upper connecting seat 11, and the lower end extends into the vacuum interrupter 4. The conductive rod 2 can move up and down in the insulator 1 and conduct or disconnect with the fixed contact; a positioning pin 5 is embedded in the top surface of the upper connecting base 11, and the positioning pin 5 is made of metal. A fixed connecting clamp 131 is provided at the bottom of the lower connecting seat 13, and the fixed connecting clamp 131 is an inverted U-shaped structure.

[0025] The high-voltage sensor 3 is mounted within the positioning plate 12. The insulator 1 is connected by curing epoxy resin to form a one-piece structure, and the high-voltage sensor 3 is entirely encapsulated within the epoxy resin. The epoxy resin provides excellent isolation between the high-voltage sensor 3 and the vacuum interrupter 4, and the insulator is protected from external contaminants and moisture, resulting in excellent insulation performance and high stability.

[0026] The high-voltage sensor 3 includes a shielding ring 31, a hollow conductive tube 32 and an embedded nut 33. The shielding ring 31 is coaxially arranged on the outside of the conductive rod 2. Multiple hollow conductive tubes 32 are vertically welded to the outside of the shielding ring 31. The hollow conductive tubes 32 extend outward along the middle layer of the positioning plate 12. The embedded nuts 33 are vertically welded to the hollow conductive tubes 32. The upper end surface of each embedded nut 33 is flush with the upper surface of the positioning plate 5.

[0027] The shielding ring 31 is a metal mesh structure, with outward-curling flanges 311 at both its upper and lower ends. The flanges 311 guide the electric field, preventing it from concentrating at either end of the shielding ring and causing localized breakdown. The inner ends of the hollow conductive tubes 32 are welded to the shielding ring 31, while their outer ends are located on the side of the positioning plate 12 and sealed with rivets 321. Multiple hollow conductive tubes 32 are welded at equal angles around the shielding ring within the positioning plate 12. Some of these hollow conductive tubes 32 are welded with embedded nuts 33, while others are not. The presence of more hollow conductive tubes 32 than embedded nuts 33 provides more heat dissipation channels, enhancing heat dissipation without compromising voltage sensing. The embedded nuts 33 have threads 331 on their inner walls and knurling 332 on their outer surfaces. The upper end of the embedded nuts 33 is flat, while the lower end is spherical. The lower end of the embedded nuts 33 is welded to the upper side of the hollow conductive tubes. The internal threads of the embedded nut 33 can be connected to the terminals of the external measuring device, while the external knurling can enhance the bonding force between the embedded nut and the insulator 1, thereby improving the embedding effect of the embedded nut.

[0028] The application principle of the present utility model is as follows: the upper end of the conductive rod 2 is connected to the external circuit, and a fixed contact corresponding to the conductive rod 2 is provided at the bottom of the vacuum interrupter 4. The conductive rod 2 moves downward in the insulator 1 and is turned on when it contacts the fixed contact, thereby realizing the closing of the circuit breaker. At this time, a large amount of corona is generated at the contact point, and the shielding ring 31 can shield the electric field around the conductive rod to prevent the electric field from breaking down; the positioning plate 12 is connected to the external mounting structure, and the embedded nut 33 on the positioning plate 12 is connected to the external detection equipment. The current passes through the shielding ring 31, the hollow conductive tube 32 and the embedded nut 33, and is detected in real time by the external detection equipment, so that the internal high voltage can be monitored and adjusted; at the same time, the heat energy generated by the discharge is dissipated outward through the hollow pipe of the hollow conductive tube 32, so that the internal heat energy is dissipated faster, and has good heat dissipation and conductivity.

[0029] The above descriptions are merely some preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes and substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A wind energy circuit breaker pole, characterized in that: It includes an insulator, a vacuum interrupter, a conductive rod and a high-voltage sensor. The insulator includes an integrally formed upper connecting seat, a positioning plate and a lower connecting seat. The upper connecting seat is arranged on the upper part of the insulator, and a rectangular positioning plate protrudes outward from the middle part of the insulator. The lower connecting seat is arranged below the positioning plate. A vacuum interrupter is arranged in the lower connecting seat, and a fixed contact is arranged at the bottom of the vacuum interrupter. The core of the insulator is provided with a conductive rod, the upper end of the conductive rod is exposed from the top of the upper connecting seat, and the lower end extends into the vacuum interrupter. The conductive rod can move up and down in the insulator and conduct or disconnect with the fixed contact; the high-voltage sensor is arranged in the positioning plate, and the high-voltage sensor includes a shielding ring, a hollow conductive tube and an embedded nut. The shielding ring is coaxially arranged with the conductive rod on the outside of the conductive rod. Multiple hollow conductive tubes are vertically welded to the outside of the shielding ring. The hollow conductive tubes extend outward along the middle layer of the positioning plate. The embedded nuts are vertically welded to the hollow conductive tubes, and the upper end face of each embedded nut is flush with the upper surface of the positioning plate.

2. A wind energy circuit breaker pole according to claim 1, characterized in that: The shielding ring is a metal mesh structure, and both the upper and lower ends of the shielding ring are provided with flanges curled outwards.

3. A wind energy circuit breaker pole according to claim 2, characterized in that: The inner wall of the embedded nut is provided with threads, and the outer side surface is provided with knurling. The upper end surface of the embedded nut is flat and the lower end is a spherical structure. The lower end of the embedded nut is welded to the upper side of the hollow conductive tube.

4. A wind energy circuit breaker pole according to claim 3, characterized in that: The inner end of the hollow conductive tube is welded to the shielding ring, and the outer port is arranged on the side of the positioning plate, and the outer port is sealed with a rivet; a plurality of hollow conductive tubes welded at equal angles are arranged around the shielding ring in the positioning plate, some of the hollow conductive tubes are welded with embedded nuts, and the remaining hollow conductive tubes are not welded with embedded nuts.

5. A wind energy circuit breaker pole according to claim 4, characterized in that: The insulators are connected by curing epoxy resin to form an integrated structure, and the high-voltage sensor is entirely encapsulated in the epoxy resin.

6. A wind energy circuit breaker pole according to claim 5, characterized in that: A fixed connection base is provided at the bottom of the lower connection base, and the fixed connection base is an inverted U-shaped structure.

7. A wind energy circuit breaker pole according to claim 6, characterized in that: A positioning pin is embedded in the top surface of the upper connecting seat, and the positioning pin is made of metal.

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