High-voltage capacitor power taking device and primary and secondary fusion pole-mounted high-voltage circuit breaker

Abstract

The utility model relates to a kind of high-voltage capacitor electricity-taking device and primary and secondary fusion pole-mounted high-voltage circuit breaker, high-voltage capacitor electricity-taking device includes shell, and high-voltage connection mechanism, capacitor voltage division module, voltage transformation voltage stabilizing component and low-voltage connection mechanism are sequentially electrically connected;Capacitor voltage division module and voltage transformation voltage stabilizing component are packaged in shell;The input end of high-voltage connection mechanism is electrically connected with high-voltage line through the pole-mounted circuit breaker, and the output end of low-voltage connection mechanism is used to be electrically connected with the secondary power mechanism;Voltage transformation voltage stabilizing component and the low-voltage connection mechanism are electrically connected by second electrically-conductive insert;Low-voltage connection mechanism includes injection-molding frame, and the elastic conductive component of being fixed on the injection-molding frame;Injection-molding frame and the main body of the secondary power mechanism are detachably fixed connection, and when injection-molding frame and secondary power mechanism are fixedly connected, elastic conductive component deforms, and is electrically connected with second electrically-conductive insert, with the advantages that connection is stable and convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the technical field of power equipment, and in particular to a high-voltage capacitor power extraction device and a primary and secondary integrated pole-mounted high-voltage circuit breaker. Background Technology

[0002] A high-voltage capacitor power extraction device is a device used to extract electrical energy from high-voltage power lines. It is typically used in situations where direct connection to mains power is not possible or where independent power supply is required.

[0003] Existing high-voltage capacitor power extraction devices typically include capacitor modules, step-down modules (such as transformers), and rectifier modules. The capacitor module is used to extract power from the high-voltage power line and utilizes the voltage-dividing characteristics of the capacitor to obtain a relatively low voltage. The step-down module is used to further reduce the voltage to meet the needs of subsequent circuits, and the rectifier module is used to provide a stable operating voltage for subsequent circuits.

[0004] However, the current method of electrically connecting high-voltage capacitor power supply devices and secondary power consumption mechanisms typically involves directly connecting the two with wires. This method easily leads to difficulties in wiring, thus increasing installation complexity. Furthermore, the wires are prone to breakage or loosening in environments with frequent vibrations (such as vibrations caused by the secondary power consumption mechanism), thereby affecting the stability of the connection. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects in the prior art, thereby providing a high-voltage capacitor power extraction device and a primary and secondary integrated pole-mounted high-voltage circuit breaker.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A high-voltage capacitor power extraction device is used to connect the pole-mounted circuit breaker of the primary and secondary integrated pole-mounted high-voltage circuit breaker and the secondary power supply mechanism. It includes a housing, and a high-voltage connection mechanism, a capacitor voltage divider module, a transformer voltage regulator assembly, and a low-voltage connection mechanism that are connected in sequence. The capacitor voltage divider module and the transformer voltage regulator assembly are encapsulated within the housing; The input end of the high-voltage connection mechanism is electrically connected to the high-voltage line through the pole-mounted circuit breaker, and the output end of the low-voltage connection mechanism is used to electrically connect to the secondary power consumption mechanism. The transformer and voltage regulator assembly and the low-voltage connection mechanism are electrically connected via a second conductive insert. The low-voltage connection mechanism includes an injection molding frame and an elastic conductive component fixed on the injection molding frame; The injection molding frame is detachably and fixedly connected to the main body of the secondary power supply mechanism. When the injection molding frame is fixedly connected to the secondary power supply mechanism, the elastic conductive component deforms and becomes electrically connected to the second conductive insert.

[0007] Preferably, the injection molding frame includes a first support, a second support, and a cavity formed by the first support and the second support; The first bracket is provided with a through hole for the second conductive insert to extend into the cavity; The second bracket is fixedly connected to the secondary power supply mechanism, and the elastic conductive component is mounted on the second bracket.

[0008] Preferably, the elastic conductive component includes a conductive base, a conductive spring, and a conductive post; The conductive base is fixed on the second bracket, the conductive spring is located in the cavity, one end of which is electrically connected to the conductive base, and the other end is connected to the conductive post, which is inserted into the second conductive insert.

[0009] Preferably, the lower end face of the housing is recessed to form a first mounting cavity; One end of the injection molding frame passes through the main body of the secondary power supply mechanism and extends into the first mounting cavity; A sealing ring is also provided between the injection molding frame and the main body, and the sealing ring is located on the side of the main body away from the shell.

[0010] Preferably, the high-voltage connection mechanism is used for a plug-in sealed connection with the pole-mounted circuit breaker to seal the input end of the high-voltage connection mechanism.

[0011] Preferably, the high-voltage connection mechanism includes a plug-in portion and a conductive rod; The plug-in part is fixedly connected to the housing and forms a plug-in groove for sealing connection with the pole-mounted circuit breaker; The plug portion is also formed with a mounting groove, which is located radially inside the plug groove. The conductive rod is inserted into the mounting slot, and its upper end is electrically connected to the capacitor voltage divider module through the first conductive insert.

[0012] Preferably, the insertion part includes a first annular cylinder and a second annular cylinder arranged coaxially, the inner wall surface of the first annular cylinder and the outer wall surface of the second annular cylinder forming the insertion groove, and the inner wall surface of the second annular cylinder forming the mounting groove. And / or, The axial depth of the mounting groove is greater than the axial depth of the insertion groove. And / or, The insertion portion is formed on the outside of the housing by epoxy resin injection molding; And / or, The first conductive insert is fixed on the transformer and voltage regulator assembly, and the conductive rod is detachably connected to the first conductive insert.

[0013] Preferably, the capacitor voltage divider module includes a first capacitor voltage divider and a second capacitor voltage divider arranged in series. The input terminal of the first capacitor voltage divider is electrically connected to the high voltage connection mechanism, and the output terminal is electrically connected to the second capacitor voltage divider. The first capacitor voltage divider is located on the upper part of the transformer and voltage regulator assembly, and the second capacitor voltage divider is located on the side of the transformer and voltage regulator assembly.

[0014] Preferably, the housing includes a primary casting body and a secondary casting body; the primary casting body is formed by epoxy resin injection molding, and the capacitor voltage divider module is encapsulated within the primary casting body; a second mounting cavity for installing the transformer and voltage regulator assembly is formed within the primary casting body, and the secondary casting body is formed by injecting silicone rubber into the second mounting cavity and curing it to encapsulate the transformer and voltage regulator assembly; and / or; The transformer and voltage regulator assembly includes a reactor, a transformer, a filter, rectifier, and protection board, and a mounting plate. The reactor is connected between the transformer and one of the capacitors in the second capacitor voltage divider section. The transformer is connected in parallel with one of the capacitors in the second capacitor voltage divider section. The filter, rectifier, and protection board includes a filter, rectifier unit and a protection unit. The filter, rectifier unit is electrically connected to one of the output terminals of the transformer, and the protection unit is electrically connected to both the output terminal of the filter, rectifier unit and the other output terminal of the transformer. The reactor, the transformer, and the filter, rectifier, and protection board are all fixedly mounted on the mounting plate. And / or, The housing is connected to the main body of the secondary power supply mechanism by a number of fixed connectors; an annular sealing strip is fixedly provided on the lower end face of the housing, and the fixed connectors and the low-voltage connection mechanism are located on the outer and inner sides of the annular sealing strip, respectively.

[0015] A primary and secondary integrated pole-mounted high-voltage circuit breaker includes a pole-mounted circuit breaker, a secondary power supply mechanism, and a high-voltage capacitor power extraction device as described above. The high-voltage input terminal of the high-voltage capacitor power extraction device is electrically connected to the pole-mounted circuit breaker, and the low-voltage input terminal of the high-voltage capacitor power extraction device is electrically connected to the secondary power consumption mechanism. The high-voltage capacitor power extraction device is fixed on the main body of the secondary power consumption mechanism and is located between two adjacent pole-mounted circuit breakers.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a high-voltage capacitor power extraction device, which achieves electrical connection between the high-voltage power extraction device and the secondary power consumption mechanism through the cooperation of an injection molding frame, an elastic conductive component, and a second conductive insert. This method enables both rapid disassembly of the high-voltage power extraction device relative to the secondary power consumption mechanism and ensures a stable electrical connection between the two. Specifically, when the injection molding frame and the secondary power consumption mechanism are fixedly connected, the elastic conductive component, through its own elastic deformation, ensures a stable connection with the second conductive insert. When the injection molding frame and the secondary power consumption mechanism are not fixed (e.g., when removing the fasteners between them), the elastic conductive component, under its own elastic restoring force, applies a force away from the second conductive insert to the injection molding frame, facilitating rapid disassembly of the low-voltage connection mechanism, and thus, rapid disassembly of the high-voltage power extraction device relative to the secondary power consumption mechanism. Correspondingly, the primary and secondary integrated pole-mounted high-voltage circuit breaker provided by this utility model has the advantages of easy assembly and disassembly and high conductive connection stability. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the high-voltage capacitor power extraction device provided by this utility model.

[0019] Figure 2 for Figure 1 A structural diagram from another perspective (partial cross-section at the bottom).

[0020] Figure 3 for Figure 1 A cross-sectional diagram.

[0021] Figure 4 This is a schematic diagram showing the distribution of the capacitor voltage divider module and the transformer voltage regulator assembly.

[0022] Figure 5 for Figure 4 A structural diagram from another perspective.

[0023] Figure 6 for Figure 1 A cross-sectional view of the low-pressure connection mechanism.

[0024] Figure 7 for Figure 6 An enlarged view of position D1 in the middle.

[0025] Figure 8 for Figure 1 A cross-sectional view of the fixed connector location.

[0026] Figure 9 for Figure 8 An enlarged view of position D2 in the middle.

[0027] Figure 10 This is a schematic diagram of the circuit connection of the transformer and voltage regulator assembly.

[0028] Figure 11 This is a flowchart of a high-voltage capacitor power extraction device.

[0029] Figure 12 A schematic diagram of one example of the primary and secondary integrated pole-mounted high-voltage circuit breaker provided by this utility model.

[0030] Figure 13 for Figure 12 A partial cross-sectional diagram.

[0031] Figure 14 for Figure 13 Enlarged diagram of position D3 in the middle.

[0032] Explanation of reference numerals in the attached figures: 100. Pole-mounted circuit breaker; 101. Plug-in socket; 102. Spring conductive element; 200. Secondary power supply mechanism; 201. Main body; 300. High-voltage line; 1. Housing; 11. Primary casting body; 111. First mounting cavity; 112. Second mounting cavity; 12. Secondary casting body; 2. High-voltage connection mechanism; 21. Plug-in part; 211. First annular cylinder; 212. Second annular cylinder; 22. Conductive rod; 23. Plug-in slot; 24. Mounting slot; 3. Capacitor voltage divider module; 31. First capacitor voltage divider part; 32. Second capacitor voltage divider part; 33. Main board; 4. Transformer and voltage regulator assembly; 41. Reactor; 42. Transformer; 4 3. Filter rectifier protection board; 430. Heat dissipation aluminum block; 431. Filter rectifier unit; 432. Protection unit; 44. Fixing plate; 5. Low-voltage connection mechanism; 51. Injection molding frame; 511. First bracket; 5111. Through hole; 512. Second bracket; 513. Chamber; 52. Mounting screw; 53. Elastic conductive component; 531. Conductive seat; 532. Conductive spring; 533. Conductive post; 54. Sealing ring; 6. First conductive insert; 7. Second conductive insert; 8. Fixed connector; 81. Fixing seat; 82. Fixing insert; 83. Locking bolt; 84. Waterproof cap; 9. Annular sealing strip; 10. Protective layer. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] See Figures 1 to 14 This utility model embodiment provides a high-voltage capacitor power extraction device for connecting the pole-mounted circuit breaker 100 and the secondary power supply mechanism 200 of the primary and secondary integrated pole-mounted high-voltage circuit breaker.

[0037] Specifically, the high-voltage capacitor power extraction device includes a housing 1, and a high-voltage connection mechanism 2, a capacitor voltage divider module 3, a transformer voltage regulator assembly 4, and a low-voltage connection mechanism 5 connected in sequence. The capacitor voltage divider module 3 and the transformer voltage regulator assembly 4 are encapsulated within the housing 1. The input end of the high-voltage connection mechanism 2 is electrically connected to the high-voltage line 300 through a pole-mounted circuit breaker 100, and the output end of the low-voltage connection mechanism 5 is used to electrically connect to the secondary power consumption mechanism 200.

[0038] It is easy to understand that the input end of the high-voltage connection mechanism 2 is electrically connected to the high-voltage line 300, and the output end is electrically connected to the capacitor voltage divider module 3 to achieve high-voltage power extraction; the capacitor voltage divider module 3 is used to perform initial voltage division of the high-voltage electricity. The output end of the capacitor voltage divider module 3 is electrically connected to the transformer and voltage regulator assembly 4, thereby enabling secondary processing (such as voltage regulation, rectification, protection, etc.). The output end of the transformer and voltage regulator assembly 4 is electrically connected to the secondary power consumption mechanism 200 to supply the required current to the secondary power consumption mechanism 200.

[0039] See Figures 1 to 14 The transformer and voltage regulator assembly 4 and the low-voltage connection mechanism 5 are electrically connected through the second conductive insert 7. The low-voltage connection mechanism 5 includes an injection molding frame 51 and an elastic conductive assembly 53 fixed on the injection molding frame 51. The injection molding frame 51 is detachably and fixedly connected to the main body 201 of the secondary power supply mechanism 200. When the injection molding frame 51 is fixedly connected to the secondary power supply mechanism 200, the elastic conductive assembly 53 deforms and is electrically connected to the second conductive insert 7.

[0040] It is easy to understand that in the above scheme, the high-voltage capacitor power extraction device achieves electrical connection between the high-voltage power extraction device and the secondary power consumption mechanism 200 through the cooperation of the injection molding frame 51, the elastic conductive component 53, and the second conductive insert 7. This method can achieve both rapid disassembly of the high-voltage power extraction device relative to the secondary power consumption mechanism 200 and ensure a stable electrical connection between the high-voltage power extraction device and the secondary power consumption mechanism 200. Specifically, when the injection molding frame 51 and the secondary power consumption mechanism 200 are fixedly connected, the elastic conductive component 53 can ensure a stable connection with the second conductive insert 7 through its own elastic deformation; while when the injection molding frame 51 and the secondary power consumption mechanism 200 are not fixed (such as when removing the fasteners between them), the elastic conductive component 53 can apply a force away from the second conductive insert 7 to the injection molding frame 51 under the action of its own elastic restoring force, which facilitates the rapid disassembly of the low-voltage connection mechanism 5, and thus facilitates the rapid disassembly of the high-voltage power extraction device relative to the secondary power consumption mechanism 200.

[0041] Specifically, the low-voltage connection mechanism 5 also includes a number of mounting screws 52, and the injection molding frame 51 is fixedly connected to the main body 201 of the secondary power supply mechanism 200 by the number of mounting screws 52.

[0042] Furthermore, the injection molding frame 51 includes a first support 511, a second support 512, and a cavity 513 formed by the first support 511 and the second support 512. The first support 511 has a through hole 5111 for the second conductive insert 7 to extend into the cavity 513. The second support 512 is fixedly connected to the secondary power supply mechanism 200, and the elastic conductive component 53 is installed on the second support 512. That is, the first support 511 and the second support 512 are separate structures. The through hole 5111 is provided on the first support 511, and the elastic conductive component 53 is provided on the second support 512. When the mounting screw 52 is removed, the elastic restoring force of the elastic conductive component 53 can push the second support 512 away from the first support 511, realizing the rapid separation of the first support 511 and the second support 512. At the same time, the elastic conductive component 53 and the second conductive insert 7 are also quickly separated.

[0043] Furthermore, the elastic conductive component 53 includes a conductive base 531, a conductive spring 532, and a conductive post 533; the conductive base 531 is fixed on the second support 512, the conductive spring 532 is located in the chamber 513, and one end is electrically connected to the conductive base 531, and the other end is electrically connected to the conductive post 533, and the conductive post 533 is inserted into the second conductive insert 7.

[0044] It should be understood that the cavity 513 provides sufficient deformation space for the conductive spring 532, and the inner wall of the through hole 5111 abuts against the outer wall of the second conductive insert 7. This allows the through hole 5111 to both facilitate the insertion of the conductive post 533 into the second conductive insert 7 and, by abutting against the outer wall of the second conductive insert 7, to achieve positioning and installation while further limiting the second conductive insert 7 and preventing deformation. Of course, in other embodiments, a certain gap may also be formed between the through hole 5111 and the second conductive insert 7 to facilitate installation.

[0045] Furthermore, it should be understood that when the mounting screw 52 is removed, the conductive spring 532 of the elastic conductive component 53 resets, thereby applying a pushing force away from the housing 1 to the injection molding frame 51, facilitating the rapid disassembly of the low-voltage connection mechanism 5. That is, the conductive spring 532 can ensure a tight contact between the second conductive insert 7 and the conductive post 533 when the low-voltage connection mechanism 5 is installed on the main body 201 of the secondary power supply mechanism 200, and can also apply a pushing force to the low-voltage connection mechanism 5 when it is necessary to remove the high-voltage capacitor power supply device, so that the low-voltage connection mechanism 5 can quickly detach from the main body 201 and the housing 1 of the secondary power supply mechanism 200, thus achieving rapid disassembly.

[0046] Furthermore, the lower end face of the housing 1 is recessed to form a first mounting cavity 111; one end of the injection molding frame 51 passes through the main body 201 of the secondary power supply mechanism 200 and extends into the first mounting cavity 111, so that the arrangement of the low-voltage connection mechanism 5 will not affect the contact between the end face of the housing 1 and the end face of the main body 201 of the secondary power supply mechanism 200.

[0047] Furthermore, a sealing ring 54 is provided between the injection molding frame 51 and the main body 201, and the sealing ring 54 is located on the side of the main body 201 away from the shell 1, which ensures the seal between the end face of the second bracket 512 and the main body 201.

[0048] See Figures 1 to 14 The high-voltage connection mechanism 2 is used to plug into and seal with the pole-mounted circuit breaker 100 to seal the input end of the high-voltage connection mechanism 2; the capacitor voltage divider module 3 includes a first capacitor voltage divider 31 and a second capacitor voltage divider 32 arranged in series. The input end of the first capacitor voltage divider 31 is electrically connected to the high-voltage connection mechanism 2, and the output end is electrically connected to the second capacitor voltage divider 32; the first capacitor voltage divider 31 is located on the upper part of the transformer and voltage regulator assembly 4, and the second capacitor voltage divider 32 is located on the side of the transformer and voltage regulator assembly 4.

[0049] It is easy to understand that in the above scheme, by placing the first capacitor voltage divider 31 and the second capacitor voltage divider 32 of the capacitor voltage divider module 3 on the upper and side parts of the transformer and voltage regulator assembly 4, respectively, the structure of the capacitor voltage divider module 3 and the transformer and voltage regulator assembly 4 can be made more compact, thereby achieving a miniaturized design of the high-voltage capacitor power extraction device. Furthermore, the high-voltage capacitor power extraction device is connected to the pole-mounted circuit breaker 100 via a plug-in sealed connection through the high-voltage connection mechanism 2, which helps to prevent the connection point from being exposed to air for a long time and thus oxidizing and failing, effectively ensuring the stability of the connection.

[0050] Specifically, the first capacitor voltage divider 31 and the second capacitor voltage divider 32 both include several capacitors connected in series, and all capacitors are mounted on the motherboard 33. The first conductive insert 6 is also fixedly mounted on the motherboard 33.

[0051] See Figures 1 to 6 , Figure 13 and Figure 14 The high-voltage connection mechanism 2 includes a plug-in part 21 and a conductive rod 22. The plug-in part 21 is fixedly connected to the housing 1 and forms a plug-in groove 23 for sealing connection with the pole-mounted circuit breaker 100. A mounting groove 24 is also formed on the plug-in part 21, which is located radially inside the plug-in groove 23. The conductive rod 22 is inserted into the mounting groove 24, and its upper end is electrically connected to the capacitor voltage divider module 3 through the first conductive insert 6.

[0052] It is easy to understand that the plug-in part 21 has a plug-in groove 23 and a mounting groove 24, and the mounting groove 24 is located inside the plug-in groove 23, so that when the plug-in part 21 is plugged into the pole-mounted circuit breaker 100, an abutment seal can be formed on the wall surface of the plug-in groove 23 (that is, a seal is formed by the two sides abutting each other), which can effectively seal the electrical connection position between the conductive rod 22 and the pole-mounted circuit breaker 100.

[0053] Furthermore, the first conductive insert 6 is fixed on the transformer and voltage regulator assembly 4, and the conductive rod 22 is detachably connected to the first conductive insert 6.

[0054] It is easy to understand that, in this embodiment, during the processing of the high-voltage capacitor power extraction device, the first conductive insert 6 can be fixed by the transformer and voltage regulator assembly 4, which facilitates the positioning and installation of the first conductive insert 6 and avoids the first conductive insert 6 shifting during the processing of the housing 1 (i.e., during injection molding). The conductive rod 22 is detachably connected to the first conductive insert 6. After the first conductive insert 6 is positioned, it also facilitates the positioning and installation of the conductive rod 22. This effectively prevents the offset of the central axis of the conductive rod 22 from affecting the insertion seal between the plug-in part 21 and the pole-mounted circuit breaker 100. Simultaneously, it ensures an effective electrical connection between the end of the conductive rod 22 furthest from the first conductive insert 6 and the pole-mounted circuit breaker 100.

[0055] Furthermore, the insertion part 21 includes a first annular cylinder 211 and a second annular cylinder 212 arranged coaxially. The inner wall surface of the first annular cylinder 211 and the outer wall surface of the second annular cylinder 212 form an insertion groove 23, and the inner wall surface of the second annular cylinder 212 forms an installation groove 24.

[0056] Furthermore, the axial depth of the mounting groove 24 is greater than the axial depth of the insertion groove 23, that is, the length of the second annular cylinder 212 is greater than that of the first annular cylinder 211, which is beneficial for limiting the conductive rod 22 and further sealing it.

[0057] Furthermore, the insertion part 21 is formed on the outside of the housing 1 by epoxy resin injection, which facilitates the local encapsulation of the conductive rod 22 and ensures the stability of the connection of the conductive rod 22.

[0058] It is worth noting that a protective layer 10 can also be provided on the outside of the housing 1, and the protective layer 10 can be integrally injection molded with the insertion part 21.

[0059] Furthermore, both the first conductive insert 6 and the second conductive insert 7 can be configured as electrical contacts.

[0060] See Figure 3The housing 1 includes a primary casting body 11 and a secondary casting body 12. The primary casting body 11 is formed by epoxy resin injection, and a capacitor voltage divider module 3 is encapsulated inside the primary casting body 11. A second mounting cavity 112 for installing the transformer and voltage regulator assembly 4 is formed inside the primary casting body 11. The secondary casting body 12 is formed by injecting silicone rubber into the second mounting cavity 112 and curing it to encapsulate the transformer and voltage regulator assembly 4.

[0061] It is easy to understand that during processing, the capacitor voltage divider module 3 can be fixed on the mold first, and then epoxy resin can be used to form a primary casting body 11 to encapsulate the capacitor voltage divider module 3 and form a second mounting cavity 112. Then, the transformer and voltage regulator component 4 can be installed in the second mounting cavity 112. After that, silicone rubber can be used to form a secondary casting body 12 to encapsulate the transformer and voltage regulator component 4.

[0062] See Figure 5 , Figure 10 and Figure 11 The transformer and voltage regulator assembly 4 includes a reactor 41, a transformer 42, a filter rectifier protection board 43, and a mounting plate 44. The reactor 41 is connected between the transformer 42 and one of the capacitors in the second capacitor voltage divider 32. The transformer 42 is connected in parallel with one of the capacitors in the second capacitor voltage divider 32. The filter rectifier protection board 43 includes a filter rectifier unit 431 and a protection unit 432. The filter rectifier unit 431 is electrically connected to one of the output terminals of the transformer 42. The output terminals of the filter rectifier unit 431 and the other output terminal of the transformer 42 are both electrically connected to the protection unit 432. The reactor 41, the transformer 42, and the filter rectifier protection board 43 are all fixedly installed on the mounting plate 44.

[0063] Specifically, the reactor 41 and transformer 42 can be tied to the fixing plate 44 with cable ties and arranged side by side. The filter rectifier protection plate 43 is fixed at the end of the fixing plate 44 away from the reactor 41 and transformer 42. A heat dissipation aluminum block 430 can be installed on the filter rectifier protection plate 43 for heat dissipation.

[0064] Furthermore, the high-voltage capacitor power extraction device operates on the principle of a capacitive voltage transformer (CVL), comprising a parallel capacitor voltage divider unit (i.e., capacitor voltage divider module 3) and an electromagnetic unit (i.e., transformer and voltage regulator assembly 4). The capacitor voltage divider section draws high voltage from the high-voltage end and then divides the voltage through series polypropylene film capacitors, achieving uniform voltage distribution and high withstand voltage. This results in good stability under long-term grid operation conditions. The voltage divider capacitors C1-C... n Then, the capacitor C located at the very end 21 Parallel electromagnetic unit, capacitor C 21 Voltage U on both sides c It can be calculated using the following formula: U c=U0×[C1×……×C n / (C1+……+C n )×(C1+……+C n +C 21 )]; In the electromagnetic unit section, the voltage reduced by the series capacitor is first stabilized by the reactor 41 to suppress the fault current amplitude, which can effectively protect the secondary equipment (i.e., the secondary power supply mechanism 200). Then, if AC power is required, it can be directly output through the transformer 42 and the protection unit 432 to output the AC power required by the secondary equipment. If the output is DC power, the output of the transformer 42 also needs to pass through the filter and rectification unit 431 and the protection unit 432 before finally outputting DC power. Compared with the current capacitor power supply principle, this method has the advantages of lower internal resistance and stronger load-carrying capacity.

[0065] Therefore, the working principle of this high-voltage capacitor power extraction device is as follows: the high-voltage connection mechanism 2 extracts high-voltage electricity from the high-voltage side (i.e., the high-voltage side of the pole-mounted circuit breaker 100), and the voltage is divided to the preset voltage value (i.e., U in the previous text) by the inverted L-shaped capacitor voltage divider module 3. c When low-voltage AC power is required, the voltage output by the capacitor voltage divider module 3 is processed by the transformer 42 and the protection unit 432 to output the AC power required by the secondary equipment; when low-voltage DC power is required, the voltage output by the capacitor voltage divider module 3 is processed by the transformer 42, the filter rectifier unit 431 and the protection unit 432 to output the low-voltage DC power required by the secondary equipment.

[0066] It is worth noting that the reactor 41, transformer 42, and filter rectifier protection board 43 can be electrically connected according to the circuit diagram.

[0067] See Figure 8 and Figure 9 The housing 1 is connected to the main body 201 of the secondary power supply mechanism 200 by several fixed connectors 8; an annular sealing strip 9 is fixedly provided on the lower end face of the housing 1, and the fixed connectors 8 and the low-voltage connection mechanism 5 are located on the outer and inner sides of the annular sealing strip 9, respectively, so as to avoid water accumulation at the fixed connectors 8 and thus affecting the effective connection between the low-voltage connection mechanism 5 and the secondary power supply mechanism 200.

[0068] Furthermore, the fixed connector 8 includes a fixed base 81, a fixed insert 82, a locking bolt 83, and a waterproof cap 84; the fixed base 81 is integrally formed with the housing 1, and a through hole is formed on the fixed base 81. The fixed insert 82 is embedded in the inner wall of the through hole. The locking bolt 83 passes through the fixed insert 82 and the main body 201 of the secondary power supply mechanism 200, and is connected to the nut, thereby realizing the fixed connection between the housing 1 and the main body 201 of the secondary power supply mechanism 200.

[0069] Furthermore, the waterproof cap 84 is placed on the upper end of the through hole to prevent water from accumulating in the through hole and causing the bolt to corrode.

[0070] In summary, the high-voltage capacitor driving device provided in this embodiment has at least the following advantages: 1. Simple and compact structure with a high degree of integration. The inverted L-shaped capacitor voltage divider module 3 (polypropylene film capacitors) occupies less space compared to traditional vertical capacitor arrangements. Simultaneously, it ensures sufficient distance between the high-voltage capacitor (i.e., the capacitor at the first capacitor voltage divider section 31) and low-voltage components within the power supply device (such as reactor 41 and transformer 42), preventing partial discharge during operation. Furthermore, it allows for a more compact high-voltage capacitor power supply device structure, eliminating the need for a support frame when applied to a primary and secondary integrated pole-mounted circuit breaker, thus making the overall structure of the primary and secondary integrated pole-mounted circuit breaker more compact.

[0071] 2. Better sealing at electrical connection points. Compared to traditional power extraction methods, the high-voltage capacitor power extraction device in this embodiment has no exposed high-voltage components, avoiding direct exposure of the high-voltage connection points to air, which could lead to oxidation, poor contact, and ultimately cause the secondary components (such as the secondary power supply mechanism 200) to malfunction.

[0072] 3. Easy to install, avoiding defects caused by human error during installation. The high-voltage connection mechanism 2 used in this embodiment allows for pre-installation of the high-voltage capacitor power supply device at the factory, eliminating the need for on-site wiring and shortening the construction period. Furthermore, the low-voltage connection mechanism 5 connects to the secondary power supply mechanism 200; during installation, only the mounting screws 52 need to be installed to power on the secondary power supply mechanism 200, simplifying installation and avoiding wiring errors.

[0073] 4. The power extraction principle adopts the principle of capacitive voltage transformer (CVT), which has lower internal resistance and stronger load-carrying capacity. In addition, it has a built-in overvoltage protection circuit (i.e., protection unit 432), which will not cause damage to the secondary equipment during the complete set of power frequency withstand voltage test of the primary and secondary integrated pole-mounted circuit breaker and the actual line operation overvoltage.

[0074] See Figures 12 to 14 This embodiment also provides a primary and secondary integrated pole-mounted high-voltage circuit breaker, including a pole-mounted circuit breaker 100, a secondary power supply mechanism 200, and a high-voltage capacitor power extraction device as described above. The high-voltage input terminal of the high-voltage capacitor power extraction device is electrically connected to the pole-mounted circuit breaker 100, and the low-voltage input terminal of the high-voltage capacitor power extraction device is electrically connected to the secondary power supply mechanism 200. The high-voltage capacitor power extraction device is fixed on the main body 201 of the secondary power supply mechanism 200 and is positioned between two adjacent pole-mounted circuit breakers 100.

[0075] Furthermore, the pole-mounted circuit breaker 100 is provided with a plug-in socket 101, which abuts and seals against the plug-in portion 21 of the high-voltage capacitor power extraction device. A spring conductive element 102 is installed inside the plug-in socket 101. One end of the spring conductive element 102 is connected to the output terminal of the high-voltage line 300, and the other end abuts against the conductive rod 22 of the high-voltage capacitor power extraction device.

[0076] Specifically, the spring conductive component 102 includes a spring, a screw, and a metal socket. The metal socket is electrically connected to the high-voltage line 300, and the spring is fixed to the metal socket by the screw. The spring is used to abut against the conductive rod 22.

[0077] It is easy to understand that power distribution equipment in the power grid, as an important component, usually needs to meet the requirement of miniaturization. Especially in the current application scenario of pole-mounted high-voltage circuit breakers that integrate primary and secondary circuits, both the switch (i.e., on the pole-mounted circuit breaker 100) and the secondary intelligent control device (i.e., the secondary power consumption mechanism 200) on it need to be powered. However, currently, the high-voltage capacitor power collection device on the pole-mounted circuit breaker 100 and the primary switch are usually of a separate structure. That is, the high-voltage capacitor power collection device is independently installed on both sides of the main body 201 of the secondary power consumption mechanism 200 or on the supporting bracket of the main body 201. High voltage is directly connected from the high-voltage terminal of the pole-mounted circuit breaker 100 to the high-voltage input side of the high-voltage capacitor power collection device through a cable. The high-voltage end of the high-voltage capacitor power collection device is directly exposed to the air, with only a silicone rain cap on the outside to prevent oxidation of the screws at the high-voltage connection. If the high-voltage capacitor power collection device operates under humid and hot conditions for a long time, it will aggravate the oxidation at the connection, affect the conductivity, and in severe cases, even cause the secondary part of the pole-mounted circuit breaker 100 to stop working, thereby affecting the safe operation of the power grid. Secondly, currently, high-voltage capacitor power extraction devices are all connected to both sides of the pole-mounted circuit breaker 100 using screws. On the one hand, this tends to make the main body 201 of the pole-mounted circuit breaker 100 too large, making it difficult to meet miniaturization requirements, and also makes the overall weight too heavy, which is not conducive to factory assembly. On the other hand, screw installation is cumbersome, and the waterproofing of the secondary side lead-out of the high-voltage capacitor power extraction device to the main body 201 must also be considered to ensure that the main body 201 meets waterproofing requirements. In this embodiment, a high-voltage capacitor power extraction device with a more compact structure and the ability to achieve a tight seal connection is used, which can effectively ensure the stability of the connection, and at the same time make the structure of the primary and secondary integrated pole-mounted high-voltage circuit breaker more compact.

[0078] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A high-voltage capacitor power extraction device for connecting the pole-mounted circuit breaker (100) of the primary and secondary integrated pole-mounted high-voltage circuit breaker and the secondary power supply mechanism (200). Its features are, It includes a housing (1), and a high-voltage connection mechanism (2), a capacitor voltage divider module (3), a transformer voltage regulator assembly (4), and a low-voltage connection mechanism (5) connected in sequence. The capacitor voltage divider module (3) and the transformer voltage regulator assembly (4) are encapsulated within the housing (1); The input end of the high-voltage connection mechanism (2) is electrically connected to the high-voltage line through the pole-mounted circuit breaker (100), and the output end of the low-voltage connection mechanism (5) is used to electrically connect to the secondary power supply mechanism (200). The transformer and voltage regulator assembly (4) and the low-voltage connection mechanism (5) are electrically connected through a second conductive insert (7); The low-voltage connection mechanism (5) includes an injection molding frame (51) and an elastic conductive component (53) fixed on the injection molding frame (51). The injection molding frame (51) is detachably and fixedly connected to the main body (201) of the secondary power supply mechanism (200). When the injection molding frame (51) is fixedly connected to the secondary power supply mechanism (200), the elastic conductive component (53) deforms and is electrically connected to the second conductive insert (7).

2. The high-voltage capacitor power extraction device according to claim 1, characterized in that, The injection molding frame (51) includes a first support (511), a second support (512), and a cavity (513) formed by the first support (511) and the second support (512). The first bracket (511) is provided with a through hole (5111) for the second conductive insert (7) to extend into the cavity (513). The second bracket (512) is fixedly connected to the secondary power supply mechanism (200), and the elastic conductive component (53) is installed on the second bracket (512).

3. The high-voltage capacitor power extraction device according to claim 2, characterized in that, The elastic conductive component (53) includes a conductive base (531), a conductive spring (532), and a conductive post (533); The conductive base (531) is fixed on the second bracket (512), the conductive spring (532) is located in the chamber (513), and one end is electrically connected to the conductive base (531), and the other end is connected to the conductive post (533). The conductive post (533) is inserted into the second conductive insert (7).

4. A high-voltage capacitor power extraction device according to claim 2 or 3, characterized in that, The lower end face of the housing (1) is recessed to form a first mounting cavity (111). One end of the injection molding frame (51) passes through the main body (201) of the secondary power supply mechanism (200) and extends into the first mounting cavity (111); A sealing ring (54) is also provided between the injection molding frame (51) and the main body (201), and the sealing ring (54) is located on the side of the main body (201) away from the shell (1).

5. A high-voltage capacitor power extraction device according to claim 1, characterized in that, The high-voltage connection mechanism (2) is used to plug into and seal with the pole-mounted circuit breaker (100) so that the input end of the high-voltage connection mechanism (2) is sealed.

6. A high-voltage capacitor power extraction device according to claim 5, characterized in that, The high-voltage connection mechanism (2) includes a plug-in part (21) and a conductive rod (22). The plug-in part (21) is fixedly connected to the housing (1) and forms a plug-in groove (23) for sealing connection with the pole-mounted circuit breaker (100). The plug-in portion (21) is also provided with a mounting groove (24), which is located radially inside the plug-in groove (23); The conductive rod (22) is inserted into the mounting groove (24), and its upper end is electrically connected to the capacitor voltage divider module (3) through the first conductive insert (6).

7. A high-voltage capacitor power extraction device according to claim 6, characterized in that, The insertion part (21) includes a first annular cylinder (211) and a second annular cylinder (212) arranged coaxially. The inner wall surface of the first annular cylinder (211) and the outer wall surface of the second annular cylinder (212) form the insertion groove (23), and the inner wall surface of the second annular cylinder (212) forms the mounting groove (24). And / or, The axial depth of the mounting groove (24) is greater than the axial depth of the insertion groove (23); And / or, The insertion part (21) is formed on the outside of the housing (1) by epoxy resin injection. And / or, The first conductive insert (6) is fixed on the transformer and voltage regulator assembly (4), and the conductive rod (22) is detachably connected to the first conductive insert (6).

8. A high-voltage capacitor power extraction device according to claim 1, characterized in that, The capacitor voltage divider module (3) includes a first capacitor voltage divider (31) and a second capacitor voltage divider (32) arranged in series. The input end of the first capacitor voltage divider (31) is electrically connected to the high voltage connection mechanism (2), and the output end is electrically connected to the second capacitor voltage divider (32). The first capacitor voltage divider (31) is located on the upper part of the transformer voltage regulator assembly (4), and the second capacitor voltage divider (32) is located on the side of the transformer voltage regulator assembly (4).

9. A high-voltage capacitor power extraction device according to claim 8, characterized in that, The housing (1) includes a primary casting body (11) and a secondary casting body (12); the primary casting body (11) is formed by epoxy resin injection molding, and the capacitor voltage divider module (3) is encapsulated inside the primary casting body (11); a second mounting cavity (112) for installing the transformer and voltage regulator assembly (4) is formed inside the primary casting body (11), and the secondary casting body (12) is formed by silicone rubber injection molding into the second mounting cavity (112) and curing to encapsulate the transformer and voltage regulator assembly (4). and / or; The transformer and voltage regulator assembly (4) includes a reactor (41), a transformer (42), a filter rectifier protection board (43), and a fixing plate (44); the reactor (41) is connected between the transformer (42) and one of the capacitors in the second capacitor voltage divider (32); the transformer (42) is connected in parallel with one of the capacitors in the second capacitor voltage divider (32); the filter rectifier protection board (43) includes a filter rectifier unit (431) and a protection unit (432), the filter rectifier unit (431) is electrically connected to one of the output terminals of the transformer (42), and the output terminal of the filter rectifier unit (431) and the other output terminal of the transformer (42) are both electrically connected to the protection unit (432); the reactor (41), the transformer (42), and the filter rectifier protection board (43) are all fixedly installed on the fixing plate (44). And / or, The housing (1) is connected to the main body (201) of the secondary power supply mechanism (200) by a number of fixed connectors (8); an annular sealing strip (9) is fixedly provided on the lower end face of the housing (1), and the fixed connectors (8) and the low-voltage connection mechanism (5) are located on the outer and inner sides of the annular sealing strip (9), respectively.

10. A primary and secondary integrated pole-mounted high-voltage circuit breaker, characterized in that, It includes a pole-mounted circuit breaker (100), a secondary power supply mechanism (200), and a high-voltage capacitor power extraction device as described in any one of claims 1-9 above; The high voltage input terminal of the high voltage capacitor power extraction device is electrically connected to the pole-mounted circuit breaker (100), and the low voltage input terminal of the high voltage capacitor power extraction device is electrically connected to the secondary power consumption mechanism (200). The high-voltage capacitor power extraction device is fixed on the main body (201) of the secondary power consumption mechanism (200) and is located between two adjacent pole-mounted circuit breakers (100).

Images