Combined switching device for new energy industry

Abstract

The utility model relates to the field of switch equipment, in particular to a combined switch electric appliance for the new energy industry, which comprises a fixed support, a circuit breaker operating mechanism, a solid-sealed polar pole, an isolating switch assembly and a grounding switch assembly, and an annular high-voltage sensor is arranged in an insulating layer of the solid-sealed polar pole. And a wiring terminal is embedded outside the solid-sealed polar pole, is electrically connected with the annular high-voltage sensor, and is used for connecting an external circuit assembly. According to the combined switching device, the annular high-voltage sensor is arranged in the solid-sealed polar pole, so that the high-voltage sensor can be integrated in the solid-sealed polar pole, the high-voltage sensor does not need to be independently arranged on the fixed bracket, and a copper bar is not needed to be connected with the high-voltage sensor, so that the structure of the switching device can be simplified; the installation space of the high-voltage sensor is saved, space is vacated for the overall layout optimization of the box transformer substation, and the manufacturing cost of a switching device is greatly reduced; and the structure can greatly reduce the loop resistance of the switching device, so that the overall performance is better.

Description

Technical Field

[0001] The utility model relates to the field of switchgear, in particular to a combined switch apparatus for the new energy industry. Background Technique

[0002] The combined switch apparatus is used to control the on-off of the new energy power generation system, and has functions such as protecting the transformer from overload and preventing the equipment from running with a missing phase.

[0003] In the prior art, the combined switch apparatus usually includes components such as a circuit breaker operating mechanism, a disconnector, an earthing switch, a solid-sealed pole column, and a high-voltage sensor. For a combined switch apparatus with a certain structure, three groups of high-voltage sensors are arranged on a fixed bracket, and the contact springs of the three groups of solid-sealed pole columns are respectively connected to the high-voltage sensors through copper bars. The existing high-voltage sensors all adopt a structure of epoxy resin solid-sealing casting. The disadvantage of this circuit breaker structure is that three groups of high-voltage sensors need to be respectively arranged on the fixed bracket, and three groups of copper bars are required to connect the high-voltage sensors, with a complex structure and high cost. The patent with the publication number CN113745067A discloses a wind power integrated circuit breaker. Among them, the upper outgoing line seat of the solid-sealed pole column is connected to the high-voltage sensor through an isolating knife, and the high-voltage sensor is then connected to the incoming line terminal. For the combined switch apparatus of this scheme, three groups of external high-voltage sensors also need to be arranged, and a special high-voltage sensor connection end structure needs to be designed. Moreover, the isolating knife is connected to the high-voltage sensor and then indirectly connected to the incoming line terminal, which may affect the connection stability. Summary of the Invention

[0004] The purpose of the utility model is to provide a solid-sealed pole column for a wind power switch device that can solve the above problems in view of the existing combined switch apparatuses in the background technique, which all need to arrange three separate groups of high-voltage sensors on the fixed bracket and also require copper bars for connection, with a complex structure and high cost.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions: A combined switch apparatus for the new energy industry includes a fixed bracket, a circuit breaker operating mechanism, a solid-sealed pole column, a disconnector assembly, and an earthing switch assembly, and is characterized in that: an annular high-voltage sensor is arranged in the insulating layer of the solid-sealed pole column, a wiring terminal is embedded outside the solid-sealed pole column, the wiring terminal is electrically connected to the annular high-voltage sensor, and the wiring terminal is used to connect external circuit components.

[0006] In the above scheme, the circuit breaker operating mechanism is fixedly arranged on one side of the fixed bracket, and the main shaft, isolation operating shaft, and earthing operating shaft of the circuit breaker operating mechanism are respectively arranged along the front-back direction of the fixed bracket.

[0007] In the above solution, three groups of main shaft crank arms are provided on the main shaft, and the three groups of main shaft crank arms are respectively movably connected through insulating tie rods to the connection end of the moving contact of the vacuum interrupter at the end of the solid-sealed pole column.

[0008] In the above solution, three groups of isolating crank arms are provided on the isolating operating shaft. The isolating crank arms are movably connected through insulating tie rods to the connecting piece in the middle of the isolating knife. One end of the isolating knife is movably connected to the connecting frame at the end of the solid-sealed pole column and is fixedly connected to the flexible connection at the end of the solid-sealed pole column. The other end of the isolating knife is the isolating switching end head, and the isolating switching end head corresponds to the incoming line end copper busbar arranged on the fixed bracket. When the disconnector is closed, the isolating knife rotates until the isolating switching end head at its end is electrically connected to the incoming line end copper busbar.

[0009] In the above solution, the incoming line end copper busbar is fixedly connected to the fixed bracket through corresponding insulating terminals.

[0010] In the above solution, a grounding operating shaft is provided in the circuit breaker operating mechanism, and a grounding shaft is provided on the fixed bracket. The grounding operating shaft and the grounding shaft are both arranged along the front-back direction of the fixed bracket. The grounding operating shaft is connected to the grounding shaft through a linkage mechanism, so that the grounding shaft can rotate as the grounding operating shaft rotates.

[0011] In the above solution, three groups of grounding knives are connected to the grounding shaft. One end of the grounding knife is fixedly connected to the grounding operating shaft, and the other end of the grounding knife is provided with a grounding switching end head. The grounding switching end heads respectively correspond to the corresponding grounding end copper busbars. The grounding end copper busbars are fixedly connected to the outgoing line copper busbars of the solid-sealed pole column. When the grounding switch is closed, the grounding knife rotates until the grounding switching end head is electrically connected to the grounding end copper busbar.

[0012] In the above solution, the three groups of grounding knives are connected through a shorting bar, and the shorting bar is fixedly connected to the three groups of grounding knives at a position close to the grounding switching end head.

[0013] In the above solution, a rectangular connection seat is provided in the middle of the solid-sealed pole column. The connection seat is fixedly connected to the fixed bracket. The terminal is embedded on the connection seat, and the external circuit components are arranged on the fixed bracket. The terminal is electrically connected to the external circuit components.

[0014] The utility model has positive effects: In the combined switchgear for the new energy industry of the utility model, an annular high-voltage sensor is arranged in the solid-sealed pole column. The voltage transmitted by the wind power generation system is detected through the high-voltage sensor, and the detection signal is sent to the external circuit components through the wiring terminal. After the signal is processed, the voltage data can be displayed. Through this setting, the high-voltage sensor can be integrated in the solid-sealed pole column, eliminating the need to separately set a high-voltage sensor on the fixed bracket of the combined switchgear and the need for copper bars to connect the high-voltage sensor. This can simplify the structure of the combined switchgear, save the installation space for the high-voltage sensor, create space for optimizing the overall layout of the box-type substation, and greatly reduce the manufacturing cost of the combined switchgear. Moreover, this structure can greatly reduce the loop resistance of the combined switchgear, making the overall performance better. For the combined switchgear of the utility model, the breaker operating mechanism can be horizontally arranged, and the incoming and outgoing lines are changed to an up-and-down structure, which is more in line with the layout form of the traditional switch cabinet and is more conducive to the hoisting of the switch, saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of the combined switchgear for the new energy industry of the utility model.

[0016] Figure 2 FIG. is a schematic diagram of the lower structure of the combined switchgear for the new energy industry of the utility model.

[0017] Figure 3 FIG. is a schematic diagram of the upper structure of the combined switchgear for the new energy industry of the utility model.

[0018] Figure 4 FIG. is a schematic diagram of the closing and opening operations of the combined switchgear for the new energy industry of the utility model.

[0019] Figure 5 FIG. is a schematic external structure diagram of the solid-sealed pole column.

[0020] Figure 6 is Figure 5 A-A sectional view schematic diagram of

[0021] Figure 7 is Figure 5 B-B sectional view schematic diagram of

[0022] Figure 8 FIG. is a schematic structural diagram of the high-voltage sensor inside the solid-sealed pole column.

[0023] The reference numerals in the figure are: fixed bracket 1, circuit breaker operating mechanism 2, main shaft 21, isolating operating shaft 22, earthing operating shaft 23, main shaft crank arm 24, insulating pull rod 25, solid-sealed pole column 3, insulating layer 31, vacuum interrupter 32, high-voltage sensor 33, terminal 34, connecting seat 35, moving contact connection end of vacuum interrupter 36, connecting frame 37, earthing switch assembly 4, earthing shaft 41, linkage mechanism 42, earthing knife 43, shorting bar 44, earthing closing and opening end 45, earthing terminal copper bar 46, earthing switch assembly 5, isolating knife 51, isolating crank arm 52, insulating pull rod 53, isolating closing and opening end 54, incoming line terminal copper bar 6, insulating terminal 61, outgoing line copper bar 7. Detailed implementation manners

[0024] The technical solutions of the present utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1-4 shown, a combined switchgear for the new energy industry includes a fixed bracket 1, a circuit breaker operating mechanism 2, a solid-sealed pole column 3, an earthing switch assembly 4, and an isolating switch assembly 5.

[0026] As Figures 5-8 shown, the solid-sealed pole column 3 includes components such as an external insulating layer 31 and a vacuum interrupter 32. An annular high-voltage sensor 33 is provided in the middle insulating layer 31 of the solid-sealed pole column 3. A terminal 34 is embedded on the outside of the solid-sealed pole column 3. The terminal 34 is electrically connected to the annular high-voltage sensor 33, and the terminal 34 is used to connect external circuit components. The solid-sealed pole column 3 is vertically arranged on the fixed bracket 1. A rectangular connecting seat 35 is provided in the middle of the solid-sealed pole column 3. The connecting seat 35 is used to fixedly connect the fixed bracket 1. The terminal 34 is embedded on the connecting seat 35, and the external circuit components are arranged on the fixed bracket 1. The terminal 34 is electrically connected to the external circuit components.

[0027] The circuit breaker operating mechanism 2 can adopt an existing circuit breaker operating mechanism. The circuit breaker operating mechanism 2 is fixedly arranged on one side of the fixed bracket 1. The circuit breaker operating mechanism 2 is horizontally arranged. The main shaft 21, isolating operating shaft 22, and earthing operating shaft 23 of the circuit breaker operating mechanism 2 are respectively arranged along the front-back direction of the fixed bracket 1. The arrangement mode of the main shaft 21, isolating operating shaft 22, and earthing operating shaft 23 can be set according to the structure of the circuit breaker operating mechanism. As shown in the attached Figure 1The shown circuit breaker operating mechanism 2 has a main shaft 21 disposed at the left side position of the circuit breaker operating mechanism 2, and an isolating operating shaft 22 and a grounding operating shaft 23 are respectively disposed at the right side position of the circuit breaker operating mechanism 2.

[0028] A grounding shaft 41 is provided on the fixed bracket 1. The grounding shaft 41 is disposed at the left side position of the fixed bracket 1 and above the main shaft 21. The grounding shaft 41 is arranged along the front - rear direction of the fixed bracket 1. The grounding operating shaft 23 is connected to the grounding shaft 41 through a linkage mechanism 42. When a grounding operation is performed, the grounding operating shaft 23 transmits power to the grounding shaft 41 through the linkage mechanism 42, enabling the grounding shaft 41 to rotate along with the rotation of the grounding operating shaft 23.

[0029] The grounding switch assembly 4 includes three groups of grounding knives 43 and a grounding terminal copper busbar 46.

[0030] The three groups of grounding knives 43 can adopt existing grounding knives. The grounding terminal copper busbar 46 is fixedly connected to the outgoing line copper busbar 7 at the upper end of the solid - encapsulated pole 3.

[0031] One end of the three groups of grounding knives 43 is fixedly connected to the grounding shaft 41, and the other end of the three groups of grounding knives 43 is provided with grounding closing - opening ends 45, and the grounding closing - opening ends 45 respectively correspond to the corresponding grounding terminal copper busbars 46. With this arrangement, the rotation of the grounding operating shaft 23 drives the rotation of the grounding shaft 41, and further drives the rotation of the grounding knives 43, realizing the connection or disconnection between the grounding closing - opening ends 45 at the end of the grounding knives 43 and the grounding terminal copper busbars 46, and realizing the closing and opening operations of the grounding switch.

[0032] Preferably, the three groups of grounding knives 43 are connected by a short - circuit bar 44, and the short - circuit bar 44 is fixedly connected to the three groups of grounding knives 43 at a position close to the grounding closing - opening ends 45.

[0033] Three groups of main - shaft crank arms 24 are provided on the main shaft 21 of the circuit breaker operating mechanism 2. The three groups of main - shaft crank arms 24 are respectively movably connected to the moving - contact connection end 36 of the vacuum interrupter at the end of the solid - encapsulated pole 3 through insulating pull rods 25. With this arrangement, the main shaft 21 drives the main - shaft crank arms 24 to rotate, further drives the insulating pull rods 25 to move, and drives the moving - contact connection end 36 of the vacuum interrupter to act, realizing the closing and opening operations of the circuit breaker.

[0034] The disconnecting - switch assembly 5 includes three groups of isolating knives 51 and an incoming - line terminal copper busbar 6.

[0035] The three groups of isolating knives 51 can adopt existing isolating knives. The incoming - line terminal copper busbar 6 is fixedly connected to the fixed bracket 1 through corresponding insulating terminals 61.

[0036] There are three groups of isolating toggle arms 52 provided on the isolating operating shaft 22. The three groups of isolating toggle arms 52 are respectively movably connected through insulating pull rods 53 to the connecting parts in the middle of the corresponding isolating knives 51. One end of the isolating knife 51 is movably connected to the connecting frame 37 at the end of the solid-sealed pole column 3 and is fixedly connected to the flexible connection at the end of the solid-sealed pole column 3. The other end of the isolating knife 51 is the isolating switching end 54, and the isolating switching end 54 corresponds to the incoming line end copper busbar 6 provided on the fixed bracket 1. With this arrangement, when the isolating operating shaft 22 of the circuit breaker operating mechanism rotates, it drives the three groups of isolating knives 51 to rotate, realizing the connection or disconnection between the isolating switching end 54 at the end of the isolating knife 51 and the incoming line end copper busbar 6, and realizing the closing and opening operations of the disconnecting switch.

[0037] For the combined switchgear for the new energy industry of the present utility model, the circuit breaker operating mechanism is horizontally arranged, the solid-sealed pole column is vertically arranged, the incoming line end copper busbar is arranged at the lower part of the fixed bracket, and the outgoing line end copper busbar is fixedly connected to the upper end of the solid-sealed pole column. The incoming and outgoing lines are changed to an up-and-down structure, which is more in line with the layout form of the traditional switch cabinet, more conducive to the hoisting of the switch, and saves labor costs.

[0038] For the combined switchgear for the new energy industry of the present utility model, an annular high-voltage sensor is arranged in the solid-sealed pole column. The high-voltage sensor is used to detect the voltage transmitted by the wind power generation system, and the detection signal is sent to the external circuit components through the terminal block. After the signal is processed, the voltage data can be displayed. With this arrangement, the high-voltage sensor can be integrated in the solid-sealed pole column, eliminating the need to separately set the high-voltage sensor on the fixed bracket of the combined switchgear and eliminating the need for copper busbars to connect the high-voltage sensor. This can simplify the structure of the combined switchgear, save the installation space of the high-voltage sensor, create space for optimizing the overall layout of the box transformer, and greatly reduce the manufacturing cost of the combined switchgear; moreover, this structure can greatly reduce the loop resistance of the combined switchgear and make the overall performance better.

[0039] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A combined switchgear for the new energy industry, comprising a fixed bracket, a breaker operating mechanism, a solid-sealed pole column, a disconnector assembly and an earthing switch assembly, characterized in that: An annular high-voltage sensor is provided inside the insulating layer of the solid-sealed pole column. A wiring terminal is embedded outside the solid-sealed pole column. The wiring terminal is electrically connected to the annular high-voltage sensor and is used to connect external circuit components.

2. The combined switchgear for the new energy industry according to claim 1, wherein: The circuit breaker operating mechanism is fixedly arranged on one side of the fixed bracket. The main shaft, isolating operating shaft, and grounding operating shaft of the circuit breaker operating mechanism are respectively arranged along the front-back direction of the fixed bracket.

3. The combined switchgear for the new energy industry according to claim 2, characterized in that: Three groups of main shaft crank arms are provided on the main shaft. The three groups of main shaft crank arms are respectively movably connected to the moving contact connection end of the vacuum interrupter at the end of the solid-sealed pole column through insulating tie rods.

4. The combined switchgear for the new energy industry according to claim 2, wherein: Three groups of isolating crank arms are provided on the isolating operating shaft. The isolating crank arm is movably connected to the connecting piece in the middle of the isolating knife through an insulating tie rod. One end of the isolating knife is movably connected to the connecting frame at the end of the solid-sealed pole column and is fixedly connected to the flexible connection at the end of the solid-sealed pole column. The other end of the isolating knife is the isolating switching end. The isolating switching end corresponds to the incoming line end copper busbar arranged on the fixed bracket. When the isolating switch is closed, the isolating knife rotates until its isolating switching end at the end is electrically connected to the incoming line end copper busbar.

5. The combined switchgear for the new energy industry according to claim 4, characterized in that: The incoming line end copper busbar is fixedly connected to the fixed bracket through corresponding insulating terminals.

6. The combined switchgear for the new energy industry according to claim 2, characterized in that: A grounding operating shaft is provided in the circuit breaker operating mechanism. A grounding shaft is provided on the fixed bracket. The grounding operating shaft and the grounding shaft are both arranged along the front-back direction of the fixed bracket. The grounding operating shaft is connected to the grounding shaft through a linkage mechanism so that the grounding shaft can rotate as the grounding operating shaft rotates.

7. The combined switchgear for the new energy industry according to claim 6, wherein: Three groups of grounding knives are connected to the grounding shaft. One end of the grounding knife is fixedly connected to the grounding operating shaft. The other end of the grounding knife is provided with a grounding switching end. The grounding switching ends respectively correspond to the corresponding grounding end copper busbars. The grounding end copper busbars are fixedly connected to the outgoing line copper busbars of the solid-sealed pole column. When the grounding switch is closed, the grounding knife rotates until the grounding switching end is electrically connected to the grounding end copper busbar.

8. The combined switchgear for the new energy industry according to claim 7, characterized in that: The three groups of grounding knives are connected by a shorting bar. The shorting bar is fixedly connected to the three groups of grounding knives at a position close to the grounding switching end.

9. The combined switchgear for the new energy industry according to claim 1, wherein: A rectangular connecting seat is provided in the middle of the solid-sealed pole column. The connecting seat is fixedly connected to the fixed bracket. The wiring terminal is embedded on the connecting seat. The external circuit components are arranged on the fixed bracket. The wiring terminal is electrically connected to the external circuit components.

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