Dual energy harvesting and dual sampling solid-sealed pole and circuit breaker

Abstract

The application provides a double-energy-taking and double-sampling solid-sealed pole and a circuit breaker. The double-energy-taking and double-sampling solid-sealed pole comprises an epoxy resin shell, a capacitor mounting cavity provided with a capacitor connecting insert at each of four corners of the bottom of the epoxy resin shell; a vacuum arc-extinguishing chamber mounted in the interior of the epoxy resin shell and connected to an incoming line conducting rod and an outgoing line conducting rod at two ends; an incoming line voltage sampling high-voltage arm capacitor and an incoming line power-taking high-voltage arm capacitor mounted on the capacitor connecting insert and located in the interior of the capacitor mounting cavity and connected to the incoming line conducting rod through an incoming line voltage lead; and an outgoing line voltage sampling high-voltage arm capacitor and an outgoing line power-taking high-voltage arm capacitor mounted on the capacitor connecting insert and located in the interior of the capacitor mounting cavity and connected to the outgoing line conducting rod through a high-voltage lead. According to the technical scheme of the embodiment, the vacuum arc-extinguishing chamber is provided with the voltage sampling high-voltage arm capacitor and the power-taking high-voltage arm capacitor on the incoming line side and the outgoing line side on both sides, so that the line fault detection accuracy and the power supply reliability can be improved.

Description

Technical Field

[0001] This invention belongs to the field of solid-sealed pole technology, and particularly relates to a solid-sealed pole and circuit breaker with dual energy extraction and dual sampling. Background Technology

[0002] The existing primary and secondary integrated pole-mounted switch solid-seal poles mainly integrate a set of phase voltage sampling sensors. Depending on the requirements, a set of energy-harvesting capacitors can be integrated on the incoming or outgoing side to complete the acquisition of voltage measurement signals and supply voltage. Conductive connection screws are reserved on the incoming and outgoing sides of the pole for connecting external terminals to the primary cables of overhead lines.

[0003] However, the solid-sealed pole of the primary and secondary integrated pole-mounted switch uses single-sided voltage sampling and single-sided power-taking capacitor. Single-sided voltage sampling cannot be adapted to the protection logic algorithm of dual-voltage sampling. If the voltage sensor is integrated on the outgoing line side, after the switch is opened, the voltage signal at that device location cannot be monitored in real time, which is not conducive to the status sensing and monitoring of overhead lines, resulting in low accuracy of line fault detection. When the power demand is relatively large, the capacitance value of the power-taking capacitor and the secondary voltage division are required to be relatively large, and the withstand voltage level and partial discharge level of the secondary isolation transformer are also relatively high. If a single-sided power-taking capacitor is used, it is difficult to meet the actual requirements, resulting in low yield of solid-sealed poles and low power supply reliability. Summary of the Invention

[0004] This invention provides a solid-sealed pole and circuit breaker with dual power extraction and dual sampling. Both sides of the vacuum interrupter are equipped with voltage sampling high-voltage arm capacitors and power extraction high-voltage arm capacitors on the incoming and outgoing sides, which can improve the accuracy of line fault detection and power supply reliability.

[0005] In a first aspect, embodiments of the present invention provide a solid-sealed electrode with dual energy extraction and dual sampling, comprising: An epoxy resin shell, the bottom of which is a square structure, and each of the four corners of the square structure is provided with a capacitor mounting cavity, and each capacitor mounting cavity is equipped with a capacitor connection insert. A vacuum interrupter is installed inside the epoxy resin shell, and its two ends are respectively connected to the inlet conductor rod and the outlet conductor rod. The input voltage sampling high-voltage arm capacitor and the input power extraction high-voltage arm capacitor are installed in the capacitor connection insert and are located inside the capacitor mounting cavity. The input voltage sampling high-voltage arm capacitor and the input power extraction high-voltage arm capacitor are connected to the input conductive rod through the input voltage lead. The high-voltage arm capacitor for sampling outgoing line voltage and the high-voltage arm capacitor for taking outgoing line power are installed in the capacitor connection insert. The high-voltage arm capacitor for sampling outgoing line voltage and the high-voltage arm capacitor for taking outgoing line power are located inside the capacitor mounting cavity. The high-voltage arm capacitor for sampling outgoing line voltage and the high-voltage arm capacitor for taking outgoing line power are connected to the outgoing line conductive rod through a high-voltage lead.

[0006] According to some embodiments of the present invention, the vacuum interrupter is vertically arranged, the top end of the vacuum interrupter is a stationary conductive rod, the bottom end of the vacuum interrupter is a moving conductive rod, the stationary conductive rod is rigidly connected to the inlet conductive rod, the moving conductive rod is connected to a flexible connection, and the bottom end of the moving conductive rod is fastened to the top end of the insulating pull rod.

[0007] According to some embodiments of the present invention, the flexible connector is a U-shaped structure of unequal length, the opening of the flexible connector faces the outgoing conductive rod, and the long end of the flexible connector is fastened to the outgoing conductive rod; a cable plug cylinder is installed at the terminal end of the outgoing conductive rod, and two terminal fastening screw holes are provided at the terminal end of the outgoing conductive rod; the cable plug cylinder is used to install the cable, and the terminal fastening screw holes are connected to the cable plug cylinder, and the cable is fastened by mounting bolts.

[0008] According to some embodiments of the present invention, the insulating pull rod has a built-in overtravel spring, which is located on the side of the insulating pull rod near the vacuum interrupter. The upper end of the insulating pull rod is provided with a screw, which is connected to the flexible connection and the moving end conductive rod respectively.

[0009] According to some embodiments of the present invention, it further includes: A current coil is inserted through the lead-out conductive rod and installed on the lead-out side of the solidified pole. The current coil is fixed inside the epoxy resin shell by a support rod. The square structure is provided with two current secondary terminals and multiple pole mounting inserts. All pole mounting inserts are evenly distributed. The support rod is fixed to one of the pole mounting inserts. The pole mounting insert is grounded. The current coil is electrically connected to the two current secondary terminals through the support rod.

[0010] According to some embodiments of the present invention, it further includes: A shielding mesh, which is ring-shaped, is located between the current coil and the flexible connection. The outgoing conductive rod is provided with a high-voltage connection point, which is connected to the shielding mesh, the outgoing voltage sampling high-voltage arm capacitor, and the outgoing power extraction high-voltage arm capacitor.

[0011] According to some embodiments of the present invention, the outer surface of the epoxy resin shell is provided with a first umbrella skirt and a second umbrella skirt, the first umbrella skirt being located on the outer periphery of the vacuum interrupter chamber and the second umbrella skirt being located on the outer periphery of the outgoing conductive rod.

[0012] According to some embodiments of the present invention, a sealing groove is provided on the outer edge of the square structure, and an electrode sealing ring is installed in the sealing groove. The square structure is provided with multiple hollow structures.

[0013] Secondly, embodiments of the present invention also provide a circuit breaker, including a solid-sealed pole with dual energy extraction and dual sampling as described in the first aspect.

[0014] According to some embodiments of the present invention, it further includes: A switch housing is installed at the lower end of the solid-sealed pole. Inside the switch housing are installed a voltage sensor low-voltage arm voltage divider capacitor and a low-voltage side voltage divider isolation transformer of the power supply device. The voltage sensor low-voltage arm voltage divider capacitor and the low-voltage side voltage divider isolation transformer are connected to all the capacitor connection inserts through low-voltage leads.

[0015] The dual-energy-harvesting, dual-sampling solid-sealed electrode provided in this embodiment of the invention includes: an epoxy resin shell, the bottom of which has a square structure, and capacitor mounting cavities are provided at each of the four corners of the square structure, with capacitor connection inserts installed inside each capacitor mounting cavity; a vacuum interrupter, which is installed inside the epoxy resin shell, with its two ends connected to an inlet conductive rod and an outlet conductive rod, respectively; an inlet voltage sampling high-voltage arm capacitor and an inlet power-harvesting high-voltage arm capacitor, which are installed in the capacitor connection inserts; and an inlet voltage sampling high-voltage arm capacitor. The high-voltage arm capacitor and the input power-taking high-voltage arm capacitor are located inside the capacitor mounting cavity. The input voltage sampling high-voltage arm capacitor and the input power-taking high-voltage arm capacitor are connected to the input conductive rod through the input voltage lead. The output voltage sampling high-voltage arm capacitor and the output power-taking high-voltage arm capacitor are installed in the capacitor connection insert. The output voltage sampling high-voltage arm capacitor and the output power-taking high-voltage arm capacitor are located inside the capacitor mounting cavity. The output voltage sampling high-voltage arm capacitor and the output power-taking high-voltage arm capacitor are connected to the output conductive rod through the high-voltage lead. According to the technical solution of this embodiment, the high-voltage arm capacitors of the incoming line voltage sampling and the high-voltage arm capacitors of the outgoing line voltage sampling can be used to monitor the double-ended voltage measurement signal of the vacuum interrupter in real time, thereby adapting to a wider variety of protection strategies and improving the accuracy of line fault detection of the solid-sealed pole. Furthermore, by using the high-voltage arm capacitors of the incoming and outgoing lines, the capacitance value and secondary voltage division requirements of the power extraction capacitors can be met when the power extraction demand is relatively high, thereby improving the yield and power supply reliability of the solid-sealed pole. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a solid-sealed electrode with dual energy extraction and dual sampling provided in an embodiment of the present invention; Figure 2 This is a bottom view of a solid-sealed electrode with dual energy extraction and dual sampling provided in another embodiment of the present invention; Figure 3 This is a perspective view of a solid-sealed electrode with dual energy extraction and dual sampling provided in another embodiment of the present invention; Figure 4 This is a side view of a solid-sealed electrode with dual energy extraction and dual sampling provided in another embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "", etc., in the specification, claims, or the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0019] This invention provides a solid-sealed terminal block and circuit breaker with dual power extraction and dual sampling. The solid-sealed terminal block includes: an epoxy resin shell, the bottom of which has a square structure, and capacitor mounting cavities are provided at each of the four corners of the square structure, with capacitor connection inserts installed inside each capacitor mounting cavity; a vacuum interrupter, which is installed inside the epoxy resin shell, with its two ends connected to an inlet conductor rod and an outlet conductor rod, respectively; an inlet voltage sampling high-voltage arm capacitor and an inlet power extraction high-voltage arm capacitor, which are installed in the capacitor connection inserts. The line voltage sampling high-voltage arm capacitor and the incoming line power extraction high-voltage arm capacitor are located inside the capacitor mounting cavity. The incoming line voltage sampling high-voltage arm capacitor and the incoming line power extraction high-voltage arm capacitor are connected to the incoming line conductive rod through the incoming line voltage lead. The outgoing line voltage sampling high-voltage arm capacitor and the outgoing line power extraction high-voltage arm capacitor are installed in the capacitor connection insert. The outgoing line voltage sampling high-voltage arm capacitor and the outgoing line power extraction high-voltage arm capacitor are located inside the capacitor mounting cavity. The outgoing line voltage sampling high-voltage arm capacitor and the outgoing line power extraction high-voltage arm capacitor are connected to the outgoing line conductive rod through the high-voltage lead.

[0020] According to the technical solution of this embodiment, the high-voltage arm capacitors of the incoming line voltage sampling and the high-voltage arm capacitors of the outgoing line voltage sampling can be used to monitor the double-ended voltage measurement signal of the vacuum interrupter in real time, thereby adapting to a wider variety of protection strategies and improving the accuracy of line fault detection of the solid-sealed pole. Furthermore, by using the high-voltage arm capacitors of the incoming and outgoing lines, the capacitance value and secondary voltage division requirements of the power extraction capacitors can be met when the power extraction demand is relatively high, thereby improving the yield and power supply reliability of the solid-sealed pole.

[0021] Reference Figures 1 to 4 , Figure 1 This is a cross-sectional view of a solid-sealed electrode with dual energy extraction and dual sampling provided in an embodiment of the present invention; Figure 2 This is a bottom view of a solid-sealed electrode with dual energy extraction and dual sampling provided in another embodiment of the present invention; Figure 3 This is a perspective view of a solid-sealed electrode with dual energy extraction and dual sampling provided in another embodiment of the present invention; Figure 4This is a side view of a solid-sealed electrode post with dual power extraction and dual sampling provided in another embodiment of the present invention. This application provides a solid-sealed electrode post with dual power extraction and dual sampling, comprising: The epoxy resin shell 1 has a square bottom structure, and capacitor mounting cavities are provided at the four corners of the square structure. Capacitor connection inserts 16 are installed inside the capacitor mounting cavities. Vacuum interrupter 2 is installed inside the epoxy resin shell 1, and its two ends are respectively connected to the inlet conductor rod 3 and the outlet conductor rod 4. The high-voltage arm capacitor 12 for sampling the incoming line voltage and the high-voltage arm capacitor 13 for taking power from the incoming line are installed in the capacitor connection insert 16. The high-voltage arm capacitor 12 for sampling the incoming line voltage and the high-voltage arm capacitor 13 for taking power from the incoming line voltage are located inside the capacitor mounting cavity. The high-voltage arm capacitor 12 for sampling the incoming line voltage and the high-voltage arm capacitor 13 for taking power from the incoming line voltage are connected to the incoming line conductive rod 3 through the incoming line voltage lead 10. The high-voltage arm capacitor 14 for sampling outgoing line voltage and the high-voltage arm capacitor 15 for taking outgoing line power are installed in the capacitor connection insert 16. The high-voltage arm capacitor 14 for sampling outgoing line voltage and the high-voltage arm capacitor 15 for taking outgoing line power are located inside the capacitor mounting cavity. The high-voltage arm capacitor 14 for sampling outgoing line voltage and the high-voltage arm capacitor 15 for taking outgoing line power are connected to the outgoing line conductive rod 4 through a high-voltage lead.

[0022] It should be noted that the main circuit of the solid-sealed pole, from the inlet side to the outlet side, consists of the inlet conductive rod 3, the vacuum interrupter 2, the flexible connection 5, and the outlet conductive rod 4. The inlet voltage lead 10 is a high-voltage lead.

[0023] It should be noted that the solid-sealed electrode post has a round upper section and a square lower section. The bottom of the solid-sealed electrode post has a square structure with four capacitor mounting cavities evenly distributed at its four corners. These capacitor mounting cavities are used to install the high-voltage arm capacitors, specifically two sets of voltage sensor high-voltage arm capacitors and two sets of power-taking high-voltage arm capacitors, which are installed through potting. The input voltage sampling high-voltage arm capacitor 12 and the input power-taking high-voltage arm capacitor 13 are connected to the input conductive rod 3 via high-voltage leads, while the output voltage sampling high-voltage arm capacitor 14 and the output power-taking high-voltage arm capacitor 15 are connected to the output conductive rod 4 via high-voltage leads.

[0024] It should be noted that voltage sensor devices, namely high-voltage arm capacitors for voltage sampling, are installed on both sides of the arc-extinguishing chamber break. Regardless of whether the switch is in the closed or open state, the voltage measurement signals at both ends can be monitored in real time. Based on the voltage measurement signals at both ends, a wider range of protection strategies can be adapted, further improving the accuracy of line fault detection of the switchgear.

[0025] It should be noted that both sides of the vacuum interrupter 2 break are equipped with power-taking capacitor devices, namely high-voltage arm capacitors. By taking power from both paths, the output power requirement of a single power-taking device can be effectively reduced when the secondary power supply load remains unchanged. This reduces the primary input voltage of the secondary isolation transformer of the power-taking device, thereby reducing the insulation requirements of the isolation transformer and effectively improving the power supply reliability of the switch power-taking device.

[0026] It should be noted that the solid-sealed electrode has reserved installation positions for the high-voltage arm capacitor for power extraction and the high-voltage arm capacitor for voltage sampling on both sides of the 2-break of the vacuum interrupter. The high-voltage arm capacitor for voltage sampling and the high-voltage arm capacitor for power extraction can effectively improve the functional adaptability of the solid-sealed electrode. The high-voltage arm capacitor for power extraction and the high-voltage arm capacitor for voltage sampling can be flexibly configured according to actual needs, thereby expanding the application range of the solid-sealed electrode.

[0027] It should be noted that existing solid-seal pole-mounted switches with integrated primary and secondary circuits mainly integrate a set of phase voltage sampling sensors. Depending on requirements, a set of energy-harvesting capacitors can be integrated on the incoming or outgoing side to complete the acquisition of voltage measurement signals and supply voltage. Conductive connection screws are reserved on the incoming and outgoing sides of the pole for connecting external terminals to the primary cables of overhead lines. Existing technology uses single-sided voltage sampling with a single-sided integrated energy-harvesting capacitor. However, single-sided voltage sampling cannot be adapted to protection logic algorithms based on dual-voltage sampling, such as for grid-source separation switches. Furthermore, if the voltage sensor is integrated on the outgoing side, after the switch is opened, the voltage signal at that location cannot be monitored in real time, which is detrimental to the status sensing and monitoring of overhead lines. Using a single-sided integrated energy-harvesting capacitor when the power demand is relatively high, such as greater than 10W, requires a large capacitance value and a high secondary voltage divider, as well as high withstand voltage and partial discharge levels in the secondary isolation transformer, which is difficult to achieve and results in low yield. Moreover, the output power is limited, and adaptability is low.

[0028] It should be noted that, in order to solve the aforementioned technical problems in the prior art, the present invention provides a dual-energy-harvesting, dual-sampling solid-sealed pole and circuit breaker, such as... Figure 1 As shown, a structural scheme employing voltage sensors and energy harvesting devices arranged on both sides of the arc-extinguishing chamber break is adopted. The overall design utilizes miniaturization and lightweight principles, achieving a functionally rich, structurally convenient, and highly efficient solid-sealed pole application solution. It can monitor the dual-terminal voltage measurement signals of the vacuum arc-extinguishing chamber 2 in real time through the voltage sampling high-voltage arm capacitors on both sides, thereby adapting to a wider range of protection strategies and improving the accuracy of line fault detection for the solid-sealed pole. Furthermore, by utilizing the high-voltage arm capacitors for power harvesting, it can meet the requirements of capacitor capacitance and secondary voltage division when power demand is high, thus improving the yield and power supply reliability of the solid-sealed pole.

[0029] Additionally, in one embodiment, reference is made to Figure 1The vacuum interrupter 2 is vertically set. The top of the vacuum interrupter 2 is a stationary conductive rod, and the bottom of the vacuum interrupter 2 is a moving conductive rod. The stationary conductive rod is rigidly connected to the inlet conductive rod 3, and the moving conductive rod is connected to a flexible connection 5. The bottom of the moving conductive rod is fastened to the top of the insulating pull rod 6.

[0030] It should be noted that the incoming conductive rod 3 and the stationary conductive rod of the vacuum interrupter 2 are rigidly connected by a threaded structure; the moving conductive rod of the interrupter is connected to the upper surface of the short end of the flexible connection 5 of unequal length, and is fastened by the upper screw of the insulating pull rod 6. That is, the short end of the flexible connection 5 is located between the moving conductive rod and the insulating pull rod 6, and the top screw of the insulating pull rod 6 passes through the short end of the flexible connection 5; the long end of the flexible connection 5 is fastened to the outgoing conductive rod 4 by two sets of M8 socket head cap screws.

[0031] Additionally, in one embodiment, reference is made to Figure 1 The flexible connector 5 is a U-shaped structure of unequal length. The opening of the flexible connector 5 faces the outgoing conductive rod 4, and the long end of the flexible connector 5 is fastened to the outgoing conductive rod 4. The terminal of the outgoing conductive rod 4 is equipped with a cable plug cylinder 302. The terminal of the outgoing conductive rod 4 is provided with two terminal connection fastening screw holes 301. The cable plug cylinder 302 is used to install the cable. The terminal connection fastening screw holes 301 are connected to the cable plug cylinder 302, and the cable is fastened by the mounting bolts.

[0032] It should be noted that the existing primary and secondary integrated pole-mounted switch input and output terminals require external terminals for cable connection. This requires pre-installing the cable clamps on the switch installation site by installing the cables onto the clamps, and then installing the cable clamps onto the switch input and output terminals. This is costly and labor-intensive.

[0033] It should be noted that the overall structure of the solid-sealed pole of this invention adopts a top-in, bottom-out configuration, which conforms to the current mainstream installation habits of the primary main circuit cable of pole-mounted switches. The inlet and outlet terminals of the solid-sealed pole of this invention are changed from the traditional flat connection terminal scheme to cylindrical terminals. The primary cable is directly inserted into the cable insertion cylinder 302 of the inlet or outlet terminal, and then two sets of hexagonal bolts are installed through the terminal fastening screw holes 301 to secure the primary cable. This cable connection scheme avoids the need for prefabricated cable clamps, directly connecting the primary cable to the switch terminals, making installation convenient and efficient, and reducing the material cost of multiple cable clamps. The terminal fastening screw holes 301 and cable insertion cylinders 302 at the inlet and outlet ports of the switch enable rapid connection of the primary cable, reducing the use of cable clamps, lowering costs, and improving the efficiency of primary cable wiring.

[0034] It should be noted that the terminal fastening screw hole 301 is connected to the interior of the cable plug cylinder 302. That is, by installing the bolt kit on the cable plug cylinder 302, the primary cable located inside the cable plug cylinder 302 is fixed inside the cable plug cylinder 302. This application does not limit the position of the terminal fastening screw hole 301. The terminal fastening screw hole 301 is located on the horizontal section of the cable plug cylinder 302, and the horizontal section of the cable plug cylinder 302 is perpendicular to the axis of the cable plug cylinder 302.

[0035] Additionally, in one embodiment, reference is made to Figure 1 The insulating rod 6 has a built-in overtravel spring, which is located on the side of the insulating rod 6 near the vacuum interrupter 2. The upper end of the insulating rod 6 is provided with a screw, which is connected to the flexible connection 5 and the moving end conductive rod respectively.

[0036] It should be noted that the insulating rod 6 has a built-in overtravel spring, which is located near the vacuum interrupter 2; this helps to improve the stability of the closing bounce. The upper end of the insulating rod 6 is equipped with a screw, which is used to connect the flexible connection 5 to the moving end conductive rod of the vacuum interrupter 2. The screw is an M10 screw.

[0037] Additionally, in one embodiment, reference is made to Figure 1 and Figure 2 It also includes: a current coil 8, which is inserted through the outgoing conductive rod 4 and installed on the outgoing side of the solidified pole. The current coil 8 is fixed inside the epoxy resin shell 1 by a support rod 9. The square structure is provided with two current secondary terminals 17 and multiple pole mounting inserts 11. All pole mounting inserts 11 are evenly distributed. The support rod 9 is fixed to one of the pole mounting inserts 11. The pole mounting insert 11 is grounded. The current coil 8 is electrically connected to the two current secondary terminals 17 through the support rod 9.

[0038] It should be noted that the current coil 8 is a current transformer coil. The current coil 8 passes through the outgoing conductive rod 4 and is installed on the outgoing side of the solid-sealed pole. The current coil 8 is connected and fixed by the support rod 9.

[0039] It should be noted that four sets of M10 pole mounting inserts 11 are evenly distributed around the bottom of the solid-sealed pole, and the support rod 9 is welded to one of the pole mounting inserts 11 for grounding. This avoids the need for a separate grounding mounting insert for the support rod 9 and reduces the number of pole mounting inserts 11.

[0040] It should be noted that two secondary current terminals 17 are provided next to the pole mounting insert 11. The secondary current terminals 17 are secondary current wiring terminals, respectively. Figure 2 The secondary leads of the current coil 8 are led down to the S1 and S2 terminals along the support rod 9.

[0041] Additionally, in one embodiment, reference is made to Figure 1 It also includes: a shielding mesh 7, which is ring-shaped and located between the current coil 8 and the flexible connection 5. The outgoing conductive rod 4 is provided with a high-voltage connection point, which is connected to the shielding mesh 7, the outgoing voltage sampling high-voltage arm capacitor 14, and the outgoing power extraction high-voltage arm capacitor 15.

[0042] It should be noted that an annular shielding mesh 7 is provided between the current coil 8 and the flexible connection 5, which can play a role in uniforming the electric field, preventing the internal high voltage from causing partial discharge of the low potential coil, and effectively reducing the partial discharge of the solid-sealed pole.

[0043] Additionally, in one embodiment, reference is made to Figure 1 The outer surface of the epoxy resin shell 1 is provided with a first umbrella skirt 101 and a second umbrella skirt. The first umbrella skirt 101 is located on the outer periphery of the vacuum interrupter 2, and the second umbrella skirt is located on the outer periphery of the outgoing conductive rod 4.

[0044] It should be noted that the epoxy resin shell 1 of the solid-sealed terminal post is provided with two umbrella skirts 101 of different sizes, namely the first umbrella skirt 101 and the second umbrella skirt; the provision of the first umbrella skirt 101 and the second umbrella skirt is beneficial to increase the external insulation creepage distance of the solid-sealed terminal post, and at the same time increase the surface anti-fouling ability of the solid-sealed terminal post.

[0045] Additionally, in one embodiment, reference is made to Figure 2 The outer edge of the square structure is provided with a sealing groove 102, and the sealing groove 102 is equipped with a pole sealing ring. The square structure is provided with multiple hollow structures 103.

[0046] It should be noted that a sealing groove 102 is provided on the bottom outer edge of the solid-sealed pole. The sealing groove 102 is used to install the pole sealing ring. The sealing ring can prevent rainwater from entering the interior of the switch box through the bottom of the solid-sealed pole.

[0047] It should be noted that the bottom of the solidified electrode post is provided with a hollow structure 103 at all four sides. The purpose is to reduce the amount of epoxy resin used, reduce the overall weight of the electrode post, and achieve the requirements of lightweight design.

[0048] In addition, the present invention also provides a circuit breaker including a solid-sealed pole with dual energy extraction and dual sampling as described above.

[0049] It should be noted that the circuit breaker is a device with a solid-sealed pole as described in this application. This embodiment does not limit the specific type of circuit breaker, and it can be applied by using the aforementioned solid-sealed pole.

[0050] According to some embodiments of the present invention, it further includes: a switch housing, the switch housing being installed at the lower end of the solid-sealed pole, the switch housing having a voltage sensor low-voltage arm voltage divider capacitor and a low-voltage side voltage divider isolation transformer of the power extraction device installed inside the switch housing, the voltage sensor low-voltage arm voltage divider capacitor and the low-voltage side voltage divider isolation transformer being connected to all capacitor connection inserts 16 via low-voltage leads.

[0051] It should be noted that the voltage sensor low-voltage arm voltage divider capacitor and the low-voltage side voltage divider isolation transformer of the power supply device are integrated inside the switch box and connected to the capacitor connection insert 16 at the lower end of the high-voltage arm capacitor through low-voltage leads.

[0052] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0053] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

[0054] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A solid-sealed electrode with dual energy extraction and dual sampling, characterized in that, include: An epoxy resin shell, the bottom of which is a square structure, and each of the four corners of the square structure is provided with a capacitor mounting cavity, and each capacitor mounting cavity is equipped with a capacitor connection insert. A vacuum interrupter is installed inside the epoxy resin shell, and its two ends are respectively connected to the inlet conductor rod and the outlet conductor rod. The input voltage sampling high-voltage arm capacitor and the input power extraction high-voltage arm capacitor are installed in the capacitor connection insert and are located inside the capacitor mounting cavity. The input voltage sampling high-voltage arm capacitor and the input power extraction high-voltage arm capacitor are connected to the input conductive rod through the input voltage lead. The high-voltage arm capacitor for sampling outgoing line voltage and the high-voltage arm capacitor for taking outgoing line power are installed in the capacitor connection insert. The high-voltage arm capacitor for sampling outgoing line voltage and the high-voltage arm capacitor for taking outgoing line power are located inside the capacitor mounting cavity. The high-voltage arm capacitor for sampling outgoing line voltage and the high-voltage arm capacitor for taking outgoing line power are connected to the outgoing line conductive rod through a high-voltage lead.

2. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 1, characterized in that, The vacuum interrupter is vertically arranged, with a stationary conductive rod at the top and a moving conductive rod at the bottom. The stationary conductive rod is rigidly connected to the inlet conductive rod, and the moving conductive rod is connected to a flexible connection. The bottom of the moving conductive rod is fastened to the top of the insulating pull rod.

3. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 2, characterized in that, The flexible connector is a U-shaped structure of unequal length, with its opening facing the outgoing conductive rod. The longer end of the flexible connector is fastened to the outgoing conductive rod. A cable insertion cylinder is installed at the terminal of the outgoing conductive rod, and two terminal fastening screw holes are provided at the terminal of the outgoing conductive rod. The cable insertion cylinder is used to install the cable, and the terminal fastening screw holes are connected to the cable insertion cylinder. The cable is fastened by mounting bolts.

4. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 2, characterized in that, The insulating pull rod has a built-in overtravel spring, which is located on the side of the insulating pull rod near the vacuum interrupter. The upper end of the insulating pull rod is provided with a screw, which is connected to the flexible connection and the moving end conductive rod respectively.

5. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 1, characterized in that, Also includes: A current coil is inserted through the lead-out conductive rod and installed on the lead-out side of the solidified pole. The current coil is fixed inside the epoxy resin shell by a support rod. The square structure is provided with two current secondary terminals and multiple pole mounting inserts. All pole mounting inserts are evenly distributed. The support rod is fixed to one of the pole mounting inserts. The pole mounting insert is grounded. The current coil is electrically connected to the two current secondary terminals through the support rod.

6. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 2, characterized in that, Also includes: A shielding mesh, which is ring-shaped, is located between the current coil and the flexible connection. The outgoing conductive rod is provided with a high-voltage connection point, which is connected to the shielding mesh, the outgoing voltage sampling high-voltage arm capacitor, and the outgoing power extraction high-voltage arm capacitor.

7. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 1, characterized in that, The outer surface of the epoxy resin shell is provided with a first umbrella skirt and a second umbrella skirt. The first umbrella skirt is located on the outer periphery of the vacuum interrupter chamber, and the second umbrella skirt is located on the outer periphery of the outgoing conductive rod.

8. The solid-sealed electrode with dual energy extraction and dual sampling according to claim 1, characterized in that, The outer edge of the square structure is provided with a sealing groove, and the sealing groove is equipped with a pole sealing ring. The square structure is provided with multiple hollow structures.

9. A circuit breaker, characterized in that, Including the solid-sealed electrode with dual energy extraction and dual sampling as described in any one of claims 1 to 8.

10. The circuit breaker as claimed in claim 9, characterized in that, Also includes: A switch housing is installed at the lower end of the solid-sealed pole. Inside the switch housing are installed a voltage sensor low-voltage arm voltage divider capacitor and a low-voltage side voltage divider isolation transformer of the power supply device. The voltage sensor low-voltage arm voltage divider capacitor and the low-voltage side voltage divider isolation transformer are connected to all the capacitor connection inserts through low-voltage leads.

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