Integrated switching device

Abstract

This invention discloses an integrated switchgear comprising a housing, a three-phase circuit breaker, and a three-phase switch assembly. The three-phase switch assembly comprises at least two components and is electrically connected to the three-phase circuit breaker. Both the circuit breaker and the switch assembly are located within the housing. Each switch assembly includes three-phase moving-side conductors, whose projections coincide along the direction of their arrangement. In the integrated switchgear provided in this application, the three-phase circuit breaker and the switch assembly are integrated within the housing. The projections of the three-phase moving-side conductors and the stationary-side conductors coincide along the direction of their arrangement. This allows the moving-side and stationary conductors of the switch assembly, as well as the moving-side and stationary conductors of the circuit breaker, to be shared without needing to consider shape or installation sequence. Therefore, this improves the manufacturing efficiency of the integrated switchgear components (reducing the number of molds for castings and tool changes for machined parts) and assembly efficiency, while reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to an integrated switchgear. Background Technology

[0002] In offshore wind power equipment, the internal space of the wind turbine tower is small, requiring the switchgear to have a compact structure, small footprint, and light weight.

[0003] Traditional switchgear connects its components through insulating partitions. Three-phase circuit breakers, disconnecting switches, grounding switches, and fast grounding switches are located in separate housings and are connected to each other through ventilated or non-ventilated insulating partitions.

[0004] Meanwhile, the three-phase moving-side conductor structures of the three-phase switch components in integrated switchgear are different. During assembly, it is necessary to first identify each moving-side conductor and then install each moving-side conductor in the preset position. If the installation position is incorrect, it is necessary to disassemble and reinstall, resulting in low assembly efficiency of integrated switchgear.

[0005] Therefore, how to improve the assembly efficiency of integrated switchgear is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated switchgear with high assembly efficiency.

[0007] To achieve the above objectives, the present invention provides an integrated switchgear, comprising a housing, a three-phase circuit breaker, and a three-phase switch assembly. The three-phase switch assembly comprises at least two components and is electrically connected to the three-phase circuit breaker. Both the three-phase circuit breaker and the three-phase switch assembly are located within the housing. The three-phase switch assembly includes three-phase moving-side conductors and three-phase stationary-side conductors. Along the arrangement direction of the three-phase moving-side conductors, the projections of the three-phase moving-side conductors coincide, the projections of the three-phase stationary-side conductors coincide, and the projections of the conductors of the three-phase circuit breaker coincide.

[0008] Optionally, in the above-mentioned integrated switchgear, the equipment housing includes a main housing cylinder, a housing support cylinder, and an outer shell detachably connected to the housing support cylinder. The side of the outer shell away from the housing support cylinder is sealed by a cover plate. The main housing cylinder is connected to the housing support cylinder, and the three-phase circuit breaker is located inside the main housing cylinder. The three-phase switch assembly is connected to the outer shell and is located in the internal space formed by the housing support cylinder and the outer shell. The three-phase switch assembly corresponds one-to-one with the outer shell.

[0009] Optionally, in the above-mentioned integrated switchgear, the side walls of the main housing and the side walls of the support housing are arc-shaped, and the axis of the main housing and the axis of the support housing are perpendicular.

[0010] Optionally, in the above-mentioned integrated switchgear, the three-phase switch assembly includes a disconnecting switch and a fast grounding switch;

[0011] Alternatively, the three-phase switch assembly may be an isolating grounding switch, which includes an isolating switch and a grounding switch.

[0012] Optionally, in the above-mentioned integrated switchgear,

[0013] The disconnecting switch includes three stationary conductors. The moving conductors of the disconnecting switch are corresponding to the stationary conductors of the disconnecting switch. The three stationary conductors of the disconnecting switch are respectively installed on the stationary conductors of the three-phase arc-extinguishing chamber of the three-phase circuit breaker. The moving conductors of the three-phase arc-extinguishing chamber are arranged in a straight line. The distance between the axes of the ends of two adjacent stationary conductors of the disconnecting switch that are connected to the moving conductors of the disconnecting switch is less than the distance between the axes of two adjacent stationary conductors of the three-phase arc-extinguishing chamber.

[0014] The isolating grounding switch includes three isolating grounding switch stationary conductors. The moving side conductors of the isolating grounding switch are one-to-one corresponding to the isolating grounding switch stationary conductors. The three isolating grounding switch stationary conductors are respectively installed on the moving side conductors of the three-phase arc-extinguishing chambers of the three-phase circuit breaker. The moving side conductors of the three-phase arc-extinguishing chambers are arranged in a straight line. The axial distance between the ends of two adjacent isolating grounding switch stationary conductors that are connected to the moving side conductors of the isolating grounding switch is less than the axial distance between the two adjacent moving side conductors of the three-phase arc-extinguishing chambers.

[0015] Optionally, in the above-mentioned integrated switchgear, the moving-side conductor of the isolating grounding switch and the moving-side conductor of the isolating switch are arranged in a mirror image using the same type of conductor.

[0016] Optionally, in the above-mentioned integrated switchgear, the free end of the stationary conductor of the disconnecting switch extends toward the moving conductor of the arc-extinguishing chamber, and the moving conductor of the disconnecting switch and the moving conductor of the disconnecting grounding switch are respectively connected in series by an insulating component and fixed on a metal or non-metal protrusion inside the housing support.

[0017] Optionally, the above-mentioned integrated switchgear also includes a fast grounding switch drive mechanism. The equipment housing includes a main housing cylinder, a housing support cylinder, and an outer shell detachably connected to the housing support cylinder. The side of the outer shell away from the housing support cylinder is sealed by a cover plate. The main housing cylinder is connected to the housing support cylinder, and the three-phase circuit breaker is located inside the main housing cylinder. The three-phase switch assembly is connected to the outer shell and is located in the internal space formed by the housing support cylinder and the outer shell. The three-phase switch assembly corresponds one-to-one with the outer shell.

[0018] The fast grounding switch, the housing, the cover plate, and the fast grounding switch drive mechanism are integrated into a detachable module.

[0019] Optionally, in the above-mentioned integrated switchgear, the three-phase switch assembly includes two, three, or four sets, wherein at least one set of the three-phase switch assembly is an isolating grounding switch;

[0020] When there are two sets of three-phase switch assemblies, the two sets of three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers.

[0021] When the three-phase switch assembly is in three groups, two groups of the three-phase switch assembly are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers, and the other group of the three-phase switch assembly is arranged on the other side of the plane formed by the center lines of the three-phase circuit breakers.

[0022] When there are four sets of three-phase switch assemblies, two sets of the three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers, and the other two sets of the three-phase switch assemblies are arranged on the other side of the plane formed by the center lines of the three-phase circuit breakers. The isolating switch stationary conductor of one set of switch assemblies is led out from the isolating switch stationary conductor of the other set of switch assemblies on the same side.

[0023] Optionally, the integrated switchgear described above also includes an outgoing bushing, a cable compartment, and a grounding block. The grounding switch stationary side of the isolating grounding switch, the outgoing bushing, and the cable compartment are all integrated on the cover plate. The cover plate is detachably connected to the housing. A grounding block is provided on the surface of the cover plate located outside the housing. The grounding switch stationary side is connected to the grounding block after being short-circuited by a rigid conductor. The grounding block and the rigid conductor are located outside the cable compartment. The grounding block is connected to the cover plate.

[0024] In the above technical solution, the integrated switchgear provided by the present invention includes a device housing, a three-phase circuit breaker, and a three-phase switch assembly. The three-phase switch assembly includes at least two components, and the three-phase switch assembly is electrically connected to the three-phase circuit breaker. Both the three-phase circuit breaker and the three-phase switch assembly are located on the device housing. The three-phase switch assembly includes three-phase moving-side conductors and three-phase stationary-side conductors. Along the arrangement direction of the three-phase moving-side conductors, the projections of the three-phase moving-side conductors coincide, the projections of the three-phase stationary-side conductors coincide, and the projections of the conductors of the three-phase circuit breaker coincide.

[0025] As described above, in the integrated switchgear provided in this application, the three-phase circuit breaker and the three-phase switch assembly are integrated into the equipment housing. Along the arrangement direction of the three-phase moving-side conductors, the projections of the three-phase moving-side conductors coincide, and the projections of the three-phase stationary-side conductors coincide. This allows the moving-side conductors and stationary-side conductors of the three-phase switch assembly, as well as the moving-side conductors and stationary-side conductors of the circuit breaker, to be shared without needing to consider shape and installation sequence. Therefore, it improves the manufacturing efficiency of the integrated switchgear components (reducing the number of molds for castings and reducing the number of tool changes for machined parts) and assembly efficiency, and reduces production costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the first integrated switching device provided in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A three-dimensional structural diagram of the integrated switchgear shown from another perspective;

[0029] Figure 3 for Figure 1 The diagram shows the external appearance of the integrated switchgear.

[0030] Figure 4 This is a schematic diagram of the structure of the second integrated switchgear provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the third integrated switchgear provided in an embodiment of the present invention;

[0032] Figure 6 This is a diagram showing the installation position of the rigid conductor provided in an embodiment of the present invention;

[0033] Figure 7 This is a diagram showing the installation location of the grounding block provided in an embodiment of the present invention;

[0034] Figure 8 This is a diagram showing the installation position of the protrusion provided in an embodiment of the present invention;

[0035] Figure 9 This is a partial layout diagram of the three-phase circuit breaker and three-phase switch assembly provided in an embodiment of the present invention.

[0036] in Figure 1-9 middle:

[0037] A1 - Three-phase switch assembly, A2 - Three-phase switch assembly, A3 - Three-phase switch assembly, A4 - Three-phase switch assembly

[0038] 11-Main shell cylinder, 12-Second branch cylinder, 13-Third branch cylinder, 14-First branch cylinder, 15-First shell, 16-Second shell, 17-Second cover plate, 171-Grounding block, 172-Rigid conductor, 18-First cover plate, 19-Protrusion;

[0039] 21-Moving conductor of arc-extinguishing chamber, 22-Vacuum arc-extinguishing chamber, 23-Stabilized conductor of arc-extinguishing chamber, 24-Stabilized insulation support of arc-extinguishing chamber, 25-Moving insulation support of arc-extinguishing chamber;

[0040] 31-Isolating stationary conductor of isolating grounding switch; 32-Isolating grounding switch moving conductor; 33-Isolating grounding switch output shaft; 34-Isolating grounding switch insulation support; 35-Grounding switch stationary side;

[0041] 41-Isolating switch stationary conductor, 42-Isolating switch moving conductor, 43-Isolating switch output shaft, 44-Isolating switch insulation support, 41'-Isolating switch stationary conductor, 42'-Isolating switch moving conductor, 43'-Isolating switch output shaft, 44'-Isolating switch insulation support;

[0042] 51- Moving side conductor of fast grounding switch, 52- Insulation support of fast grounding switch, 53- Output shaft of fast grounding switch, 51'- Moving side conductor of fast grounding switch, 52'- Insulation support of fast grounding switch, 53'- Output shaft of fast grounding switch;

[0043] 61-Main circuit conductor, 62-Outgoing bushing, 63-Outgoing cable, 61'-Main circuit conductor, 62'-Outgoing bushing, 63'-Outgoing cable, 61”-Main circuit conductor, 62”-Outgoing bushing, 63”-Outgoing cable, 64-Cable compartment;

[0044] 71-Three-phase circuit breaker mechanism, 72-Isolating grounding switch operating mechanism, 73-Fast grounding switch drive mechanism, 74-Isolating switch operating mechanism. Detailed Implementation

[0045] The core of this invention is to provide an integrated switchgear with high assembly efficiency.

[0046] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] Please refer to Figures 1 to 9 .

[0048] In one specific embodiment, the integrated switchgear provided by this invention includes a housing, a three-phase circuit breaker, and a three-phase switch assembly. The three-phase switch assembly may specifically include two, three, or four sets, wherein at least one set of the three-phase switch assembly is an isolating grounding switch.

[0049] When there are two sets of three-phase switch assemblies, the two sets of three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers.

[0050] When there are three sets of three-phase switch assemblies, two sets of three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers, and the other set of three-phase switch assemblies is arranged on the other side of the plane formed by the center lines of the three-phase circuit breakers.

[0051] When there are four sets of three-phase switch assemblies, two sets of three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers, and the other two sets of three-phase switch assemblies are arranged on the other side of the plane formed by the center lines of the three-phase circuit breakers. The stationary conductor of the disconnecting switch of one set of switch assemblies is led out from the stationary conductor of the disconnecting switch of the other set of switch assemblies on the same side.

[0052] Multiple sets of three-phase switch assemblies include at least one set of isolating and grounding switch assemblies. For example... Figure 5 As shown, the three-phase switch assembly includes two sets, namely three-phase switch assembly A1 and three-phase switch assembly A2. Figure 3 As shown, the three-phase switch assembly comprises three groups: three-phase switch assembly A1, three-phase switch assembly A2, and three-phase switch assembly A3. Figure 4 As shown, the three-phase switch assembly includes four groups, namely three-phase switch assembly A1, three-phase switch assembly A2, three-phase switch assembly A3 and three-phase switch assembly A4.

[0053] like Figure 1 and Figure 2 As shown, the three-phase circuit breaker includes a vacuum interrupter 22, a moving-side insulation support 25 for the interrupter, a stationary-side insulation support 24 for the interrupter, and moving-side conductors 21 and stationary-side conductors 23 disposed on opposite sides of the vacuum interrupter 22. The moving-side conductor 21 is supported by the moving-side insulation support 25, and the stationary-side conductor 23 is supported by the stationary-side insulation support 24. The moving-side conductors 21 and 25 can be connected one-to-one, and the stationary-side conductors 23 and 24 can be connected one-to-one. The three-phase circuit breaker is connected to the three-phase circuit breaker operating mechanism 71. The integrated switchgear also includes: main circuit conductors 61, 61', and 61”; outgoing bushings 62, 62', and 62”; outgoing cables 63, 63', and 63”; and cable compartments 64. Specifically, there can be two cable compartments 64, respectively arranged on opposite sides of the equipment housing.

[0054] The three-phase switch assembly is electrically connected to the three-phase circuit breaker. Both the three-phase circuit breaker and the three-phase switch assembly are located on the equipment housing. The three-phase switch assembly includes three-phase moving-side conductors, and the projections of the three-phase moving-side conductors coincide along the arrangement direction of the three-phase moving-side conductors.

[0055] As can be seen from the above description, in the integrated switchgear provided in the specific embodiments of this application, the three-phase circuit breaker and the three-phase switch assembly are integrated in the equipment housing. Along the arrangement direction of the three-phase moving side conductors, the projections of the three-phase moving side conductors overlap, thereby enabling the moving side conductors of the three-phase switch assembly to be shared without having to consider the shape and installation sequence of the three moving side conductors. Therefore, the assembly efficiency of the integrated switchgear is improved.

[0056] In one specific embodiment, the equipment housing includes a main housing cylinder 11, a housing support cylinder, and an outer shell detachably connected to the housing support cylinder. The side of the outer shell away from the housing support cylinder is sealed by a cover plate. A three-phase circuit breaker is located inside the main housing cylinder 11. A three-phase switch assembly is connected to the outer shell and located within the internal space formed by the housing support cylinder and the outer shell. Each three-phase switch assembly corresponds to one outer shell. The main housing cylinder 11 is connected to the housing support cylinder.

[0057] It also includes a fast grounding switch drive mechanism 73, and the fast grounding switch, housing, cover plate and fast grounding switch drive mechanism 73 are integrated into a detachable module.

[0058] For ease of processing, preferably, the side walls of the main shell 11 and the support shell are arc-shaped, and the axis of the main shell 11 is perpendicular to the axis of the support shell. The vacuum interrupter 22 is fixed inside the main shell 11, and the plane formed by the center line of the three-phase vacuum interrupter 22 can coincide with or be at a certain distance from the central axis of the main shell 11.

[0059] In actual processing, the shell support and the shell main cylinder 11 can be detachably connected, for example, by threaded fasteners, and a sealing ring can be set on the contact surface for sealing. Alternatively, the shell support and the shell main cylinder 11 can be non-detachably connected, for example, by welding or casting to form a whole.

[0060] Specifically, there can be three shell support cylinders: a first support cylinder 14, a second support cylinder 12, and a third support cylinder 13. Preferably, the shell support cylinders are integrally formed with the main shell cylinder 11, or the shell support cylinders are welded to the main shell cylinder 11. There are three cover plates: a first cover plate 18, a second cover plate 17, and a third cover plate. There are three outer shells: a first shell 15, a second shell 16, and a third shell. The first shell 15 is mounted on the first support cylinder 14, and its end is sealed by the first cover plate 18. The second shell 16 is mounted on the second support cylinder 12, and its end is sealed by the second cover plate 17. The third shell is mounted on the third support cylinder 13, and its end is sealed by the third cover plate.

[0061] The plane formed by the axes a, b, and c of the vacuum interrupter 22 in the three-phase circuit breaker can coincide with or be at a certain distance from the center line O of the main shell 11. That is, the three-phase vacuum interrupter 22 can be arranged at the center of the main shell 11 or eccentrically.

[0062] Three-phase switchgear includes disconnecting switches and fast grounding switches.

[0063] Specifically, the three-phase switch assembly can also be an isolating grounding switch, which includes an isolating switch and a grounding switch. Specifically, the isolating grounding switch is driven by an operating mechanism and has three conductors: a moving side (the isolating moving side and the grounding moving side are one component), an isolating stationary side, and a grounding stationary side. It has three operating conditions: isolating switch open, grounding switch closed; isolating switch closed, grounding switch open; and isolating switch open, grounding switch open.

[0064] Specifically, the three-phase circuit breaker, disconnecting switch, and disconnecting grounding switch are arranged in the same space formed by the main shell 11 and the shell support shell. The isolation break and arc-extinguishing chamber break of the three-phase switch assembly are located inside the same shell, and there is no need for insulating partitions to connect the components.

[0065] like Figure 1 and Figure 2 As shown, the disconnecting switch includes disconnecting switch stationary side conductors 41 and 41', disconnecting switch moving side conductors 42 and 42', disconnecting switch output shaft 43 and 43', and disconnecting switch insulating supports 44 and 44'.

[0066] The disconnector switch has three stationary conductors 41 and 41'. The disconnector switch has three moving conductors 42 and 42' that correspond one-to-one with the stationary conductors 41 and 41'. The three stationary conductors 41 and 41' are respectively installed on the stationary conductors 23 of the three-phase arc-extinguishing chamber of the three-phase circuit breaker. The moving conductors 21 of the three-phase arc-extinguishing chamber are arranged in a straight line. The distance between the axes of the ends of two adjacent stationary conductors 41 and 41' that are connected to the moving conductors 42 and 42' is less than the distance between the axes of two adjacent stationary conductors 23 of the three-phase arc-extinguishing chamber.

[0067] The isolating grounding switch includes an isolating stationary conductor 31, a moving conductor, an isolating grounding switch output shaft 33, an isolating grounding switch insulation support 34, and a grounding switch stationary side 35.

[0068] Specifically, the isolating stationary conductor 31 of the isolating grounding switch is fixed on the moving conductor 21 of the arc-extinguishing chamber, and the isolating conductors 41 and 41' of the isolating switch are fixed on the isolating conductor 23 of the arc-extinguishing chamber.

[0069] The isolating grounding switch has three isolating stationary conductors 31. The isolating grounding switch has three isolating grounding switch moving conductors 32, which correspond one-to-one with the isolating grounding switch isolating stationary conductors 31. The three isolating grounding switch isolating stationary conductors 31 are respectively installed on the moving conductors 21 of the three-phase arc-extinguishing chamber of the three-phase circuit breaker. The moving conductors 21 of the three-phase arc-extinguishing chamber are arranged in a straight line. The axial distance between the ends of the isolating stationary conductors 31 of two adjacent isolating grounding switches that are connected to the moving conductors 32 of the isolating grounding switch is less than the axial distance between the moving conductors 21 of two adjacent three-phase arc-extinguishing chambers.

[0070] like Figure 9 As shown, the phase spacing of the arc-extinguishing chamber is L1, and the phase spacing of the disconnecting switch and the disconnecting grounding switch is L2, where L2 < L1. The diameter of the shell support cylinder is smaller than the diameter of the shell main cylinder 11. By deflecting the side phase conductors of the disconnecting grounding switch stationary conductor 31 and the disconnecting switch stationary conductors 41 and 41' towards the phase-to-phase direction, while meeting the insulation requirements, the side phase stationary conductors of the disconnecting switch and the disconnecting grounding switch are deflected towards the phase-to-phase direction, making the phase spacing of the disconnecting switch and the disconnecting grounding switch smaller than the phase spacing of the arc-extinguishing chamber. This, in turn, makes the diameter of the shell support cylinder smaller than the diameter of the main cylinder, reducing the phase spacing of the disconnecting switch and the disconnecting grounding switch, thereby reducing the width, height, and weight of the switchgear and reducing the processing difficulty.

[0071] The fast grounding switch includes: fast grounding switch moving side conductors 51 and 51'; fast grounding switch insulation supports 52 and 52'; and fast grounding switch output shafts 53 and 53'.

[0072] The three-phase switch assembly includes three sets: a disconnect switch and two sets of disconnect grounding switch assemblies. The disconnect grounding switch assembly includes a disconnect grounding switch and a fast grounding switch.

[0073] like Figure 2 As shown, when the three-phase circuit breaker, the isolating grounding switch, and the disconnecting switch are all in the closed state, the current of one wind turbine A enters from the outgoing cable 63 at the isolating grounding switch, and flows sequentially through the outgoing bushing 62, the main circuit conductor 61, the moving side conductor 32 of the isolating grounding switch, the isolating stationary side conductor 31 of the isolating grounding switch, the moving side conductor 21 of the arc-extinguishing chamber, the vacuum arc-extinguishing chamber 22, the stationary side conductor 23 of the arc-extinguishing chamber, the stationary side conductor 41' of the disconnecting switch, the moving side conductor 42' of the disconnecting switch, and finally flows out through the main circuit conductor 61', the outgoing bushing 62', and the outgoing cable 63' at the disconnecting switch. The current output cable 63” of another fan B enters, passes through the output bushing 62”, the main circuit conductor 61”, the moving side conductor 42 of the disconnector switch, and the stationary side conductor 41 of the disconnector switch in sequence, and merges with the current of fan A at the stationary side conductor 23 of the arc extinguishing chamber, and flows out through the stationary side conductor 41' of the disconnector switch, the moving side conductor 42' of the disconnector switch, the output bushing 62', and the output cable 63'.

[0074] The moving-side conductor 32 of the isolating grounding switch and the moving-side conductors 42 and 42' of the isolating switch are arranged in a mirror image using the same type of conductor, improving the standardization and versatility of the parts. Specifically, the moving-side conductors 32 and 42' of the isolating grounding switch are installed with the same shape of conductors in the same flip-up direction. The three ports of the moving-side conductor 32 of the isolating grounding switch are connected to the isolating stationary conductor 31 of the isolating grounding switch, the stationary conductor 35 of the grounding switch, and the main circuit conductor 61, respectively. The three ports of the moving-side conductors 42 and 42' of the isolating switch are connected to the main circuit conductors 61 and 61', respectively, and are connected or disconnected from the stationary conductors 41 and 41' of the isolating switch and the moving-side conductors 51 and 51' of the fast grounding switch through their respective moving contacts.

[0075] The main components of this application—three-phase circuit breaker, disconnecting switch, disconnecting grounding switch, fast grounding switch, outgoing bushing, and outgoing cable—are all arranged in a "straight line" configuration, which shortens the overall length.

[0076] The grounding switch stationary side 35, the outgoing bushing 62, and the cable compartment 64 of the isolating grounding switch are integrated on the same cover plate 17. A grounding block 171 is provided on the side of the cover plate 17 outside the housing. The stationary side of the three-phase grounding switch is short-circuited to the grounding block 171 through a rigid conductor 172. The grounding block 171 and the rigid conductor 172 are located outside the cable compartment 64. The cover plate 17 is bolted to the housing 16. A countersunk hole is provided at the bolt connection so that the cable compartment 64 can fit flush with the plane of the cover plate 17. The structure is as follows. Figure 6 and Figure 7 As shown.

[0077] The fast grounding switch, housing, cover, and drive mechanism are integrated into a detachable grounding module. In practical use, the three-phase main circuit conductors 61' pass through the inside of the housing 15 where the fast grounding switch is located, with the center lines of each phase parallel to the axis of housing 15. Depending on the main wiring requirements, the detachable fast grounding switch module and the isolating switch can be replaced with an isolating grounding switch. The fast grounding switch, its operating mechanism, and housing form a detachable module, allowing for flexible removal or replacement with an isolating grounding switch depending on the application scenario.

[0078] Specifically, the fast grounding switch, as part of the detachable module, can be flexibly arranged to achieve different main wiring configurations, such as two outgoing lines, three outgoing lines, four outgoing lines, each outgoing line equipped with an isolating grounding switch, some outgoing lines equipped with an isolating grounding switch, and some outgoing lines equipped with an isolating switch + fast grounding switch. When expanding the outgoing lines, the number of disconnectors can be expanded, with each outgoing line corresponding to a corresponding isolating disconnector, avoiding the situation where three or more outgoing lines share a single isolating disconnector in the main electrical wiring.

[0079] The free ends of the stationary conductors 41 and 41' of the disconnecting switch extend towards the moving conductor 21 of the arc-extinguishing chamber. The moving conductors 42 and 42' of the disconnecting switch and the moving conductor 32 of the disconnecting grounding switch are connected in series with separate insulating components and then fixed to a metal or non-metal protrusion 19 inside the housing support cylinder. By extending the stationary conductor 41 of the disconnecting switch towards the moving conductor 21 of the arc-extinguishing chamber and fixing it to a metal or non-metal protrusion inside the main cylinder with insulating supports, a detachable module consisting of a support cylinder, disconnecting switch, and fast grounding switch can be added. This expands the three-circuit outgoing switchgear into a four-circuit outgoing switchgear, with each outgoing circuit corresponding to a separate isolating break, avoiding the situation where two circuits share an isolating break. Alternatively, the stationary conductor 41 of the disconnecting switch can be extended and fixed to the housing with an insulating component similar to that used for the moving conductor of the disconnecting switch, connecting the three-phase stationary conductors 41 in series.

[0080] Specifically, such as Figure 8 As shown, the moving-side conductor 32 of the isolating grounding switch is fixed to a metal or non-metal protrusion 19 inside the cylindrical support of the housing by an insulating component. Specifically, the three moving-side conductors 32 of the isolating grounding switch are installed through the same insulating component, which is sleeved on the insulating component. The two protrusions 19 of the moving-side conductor insulating component are connected to the housing support by welding or bolts, and are arranged in a mirror-symmetrical manner with respect to the plane formed by the center line b of the intermediate phase of the vacuum interrupter 22 and the center line b' of the intermediate phase of the moving-side conductor 32 of the isolating grounding switch.

[0081] The grounding switch stationary side 35, the outgoing bushing 62, and the cable compartment 64 of the isolating grounding switch are all integrated on the cover plate. The cover plate is detachably connected to the outer shell. A grounding block 171 is provided on the surface of the cover plate located on the outer side of the outer shell. The grounding switch stationary side 35 is connected to the grounding block 171 after being short-circuited by a rigid conductor 172. The grounding block 171 and the rigid conductor 172 are located outside the cable compartment 64.

[0082] The center line b' of the middle phase of the moving conductor 32 of the isolating grounding switch is parallel to but does not coincide with the center line b” of the housing support. The output shaft 33 of the isolating grounding switch is located inside the housing support and is directly connected to the isolating grounding switch operating mechanism 72 fixed outside the housing support. The isolating grounding switch operating mechanism 72 drives the conductor inside the moving conductor 32 of the isolating grounding switch to move along its center line through the rotation of the output shaft 33, realizing the switching of three working conditions: "isolating closed, grounding open", "isolating open, grounding open", and "isolating open, grounding closed". The moving-side conductors 42 and 42' of the disconnecting switch are also fixed to two metal or non-metal protrusions inside the support cylinder 13 by insulating parts, in the same way as the moving-side conductor 32 of the disconnecting grounding switch. The output shafts 43 and 43' of the disconnecting switch are located inside the support cylinder 14 and are directly connected to the disconnecting switch operating mechanism 74 fixed on the outside of the support cylinder 14. The disconnecting switch operating mechanism 74 drives the internal conductors of the moving-side conductors 42 and 42' of the disconnecting switch to move along their centerline by rotating the output shafts 43 and 43', thereby realizing the switching of the disconnecting switch between open and closed states.

[0083] The above structure represents the switchgear corresponding to the three outgoing lines, which constitute the largest proportion of the wind turbine tower. Two sets of disconnect switches and fast grounding switch modules are respectively arranged on both sides of the vacuum interrupter 22. For example... Figure 4 As shown, for a four-circuit switchgear, a housing support is added to the main housing 11 to install the disconnecting switch and fast grounding switch (or disconnecting grounding switch) module. The stationary conductors 41 and 41' of the disconnecting switch are extended towards the moving conductor 21 of the arc-extinguishing chamber. The extended three-phase conductors are fixed to the metal or non-metal protrusions 19 inside the main housing 11 by insulating components, thus expanding it into a four-circuit switchgear. Figure 5 As shown, for a two-circuit outgoing switchgear, one fast grounding switch and one disconnecting switch (or disconnecting grounding switch) module are removed, and the corresponding housing support can be sealed with a cover plate or removed.

[0084] Integrated switchgear integrates three-phase circuit breakers, disconnecting switches, and disconnecting grounding switches into the same housing, while integrating the operating mechanism and cable compartment into the outside of the housing. The overall layout is compact and small in size, making it suitable for use and maintenance inside towers.

[0085] This invention integrates the isolating switch and isolating grounding switch on the stationary side onto the circuit breaking stationary conductor and the moving conductor, eliminating the need for insulating partitions between the components, thus saving structural dimensions and reducing product weight.

[0086] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0087] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated switchgear, characterized in that, The device includes a housing, a three-phase circuit breaker, and a three-phase switch assembly. The three-phase switch assembly comprises at least two units and is electrically connected to the three-phase circuit breaker. Both the three-phase circuit breaker and the three-phase switch assembly are located within the housing. Each three-phase switch assembly includes three-phase moving-side conductors and three-phase stationary-side conductors. Along the arrangement direction of the three-phase moving-side conductors, the projections of the three-phase moving-side conductors coincide, the projections of the three-phase stationary-side conductors coincide, and the projections of the three-phase conductors of the three-phase circuit breaker coincide. The equipment housing includes a main housing cylinder (11), a housing support cylinder, and an outer shell detachably connected to the housing support cylinder. The side of the outer shell away from the housing support cylinder is sealed by a cover plate. The main housing cylinder (11) is connected to the housing support cylinder. The three-phase circuit breaker is located inside the main housing cylinder (11). The three-phase switch assembly is connected to the outer shell and is located in the internal space formed by the housing support cylinder and the outer shell. The three-phase switch assembly corresponds one-to-one with the outer shell. The side walls of the main housing cylinder (11) and the housing support cylinder are arc-shaped walls. At least one set of three-phase switch components is an isolating grounding switch. The isolating grounding switch includes a moving side conductor and an isolating grounding switch output shaft (33). The isolating grounding switch output shaft (33) is located inside the housing support and is directly connected to the isolating grounding switch operating mechanism (72) fixed outside the housing support. The moving side conductor of the isolating grounding switch is an isolating grounding switch moving side conductor (32) that corresponds one-to-one with the isolating grounding switch stationary side conductor (31). The isolating grounding switch moving side conductor (32) is fixed on a metal or non-metal protrusion (19) inside the housing support after being connected in series with an insulating component.

2. The integrated switchgear according to claim 1, characterized in that, The axis of the main shell (11) is perpendicular to the axis of the support shell.

3. The integrated switchgear according to claim 1, characterized in that, The three-phase switch assembly includes a disconnecting switch and a fast grounding switch; Alternatively, the three-phase switch assembly may be an isolating grounding switch, which includes an isolating switch and a grounding switch.

4. The integrated switchgear according to claim 3, characterized in that, The disconnecting switch includes three stationary conductors (41) and (41'), and the moving conductors of the disconnecting switch are moving conductors (42) and (42') that correspond one-to-one with the stationary conductors (41) and (41'). The three stationary conductors (41) and (41') are respectively installed on the stationary conductors (23) of the three-phase arc-extinguishing chamber of the three-phase circuit breaker. The moving conductors (21) of the three-phase arc-extinguishing chamber are arranged in a straight line. The distance between the axes of the ends of two adjacent stationary conductors (41) and (41') that are connected to the moving conductors (42) and (42') is less than the distance between the axes of two adjacent stationary conductors (23) of the three-phase arc-extinguishing chamber. The isolating grounding switch includes three isolating grounding switch isolating stationary conductors (31). The three isolating grounding switch isolating stationary conductors (31) are respectively installed on the arc-extinguishing chamber moving conductors (21) of the three phases of the three-phase circuit breaker. The three phase arc-extinguishing chamber moving conductors (21) are arranged in a straight line. The axial distance between the ends of the isolating grounding switch isolating stationary conductors (31) connected to the isolating grounding switch moving conductors (32) is less than the axial distance between the two adjacent three-phase arc-extinguishing chamber moving conductors (21).

5. The integrated switchgear according to claim 4, characterized in that, The moving side conductor (32) of the isolating grounding switch and the moving side conductors (42) and (42') of the isolating switch are arranged in a mirror image of the same conductor.

6. The integrated switchgear according to claim 4, characterized in that, The free ends of the stationary conductors (41) and (41') of the disconnecting switch extend toward the moving conductor (21) of the arc-extinguishing chamber. The moving conductors (42) and (42') of the disconnecting switch are connected in series by an insulating component and then fixed to a metal or non-metal protrusion (19) inside the housing support.

7. The integrated switchgear according to claim 1, characterized in that, It also includes a fast grounding switch drive mechanism (73). The equipment housing includes a main housing cylinder (11), a housing support cylinder, and an outer shell detachably connected to the housing support cylinder. The side of the outer shell away from the housing support cylinder is sealed by a cover plate. The main housing cylinder (11) is connected to the housing support cylinder. The three-phase circuit breaker is located inside the main housing cylinder (11). The three-phase switch assembly is connected to the outer shell and is located in the internal space formed by the housing support cylinder and the outer shell. The three-phase switch assembly corresponds one-to-one with the outer shell. The fast grounding switch, the housing, the cover plate, and the fast grounding switch drive mechanism (73) are integrated into a detachable module.

8. The integrated switchgear according to claim 1, characterized in that, The three-phase switch assembly includes two, three, or four sets, wherein at least one set of the three-phase switch assembly is an isolating grounding switch; When there are two sets of three-phase switch assemblies, the two sets of three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers. When the three-phase switch assembly is in three groups, two groups of the three-phase switch assembly are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers, and the other group of the three-phase switch assembly is arranged on the other side of the plane formed by the center lines of the three-phase circuit breakers. When there are four sets of three-phase switch assemblies, two sets of the three-phase switch assemblies are arranged on the same side of the plane formed by the center lines of the three-phase circuit breakers, and the other two sets of the three-phase switch assemblies are arranged on the other side of the plane formed by the center lines of the three-phase circuit breakers. The isolating switch stationary conductor of one set of switch assemblies is led out from the isolating switch stationary conductor of the other set of switch assemblies on the same side.

9. The integrated switchgear according to claim 1, characterized in that, It also includes an outgoing bushing (62), a cable compartment (64), and a grounding block (171). The grounding switch stationary side (35) of the isolating grounding switch, the outgoing bushing (62), and the cable compartment (64) are all integrated on the cover plate. The cover plate is detachably connected to the outer shell. A grounding block is provided on the surface of the cover plate located outside the outer shell. The grounding switch stationary side (35) is connected to the grounding block (171) after being short-circuited by a rigid conductor (172). The grounding block (171) and the rigid conductor (172) are located outside the cable compartment (64). The grounding block (171) is connected to the cover plate.

Images