Double-pole mutually exclusive three-position electric disconnect switch and disconnect switch cabinet

Abstract

This application provides a double-pole mutually exclusive three-position electrically operated disconnect switch, including a mounting frame, an incoming line assembly, a first outgoing line assembly, a second outgoing line assembly, a knife switch assembly, a drive assembly, and an electrically operated mechanism. The incoming line assembly is mounted on the upper part of the mounting frame, and the first and second outgoing line assemblies, symmetrically distributed front to back, are mounted on the lower part of the mounting frame. The knife switch assembly is rotatably connected to the lower end of the incoming line assembly. The knife switch assembly is connected to the drive assembly and can rotate under the drive of the drive assembly. The drive assembly is located behind the incoming line assembly and mounted on the mounting frame. The electrically operated mechanism is fixedly mounted on the outside of the mounting frame and connected to the drive assembly, used to operate the drive assembly via a motor drive to achieve selective contact connection between the knife switch assembly and the first and second outgoing line assemblies. This application achieves a double-pole parallel configuration in a single device, making the two-pole control structure arrangement more compact and significantly reducing installation space.

Description

Technical Field

[0001] This application relates to the field of power distribution equipment technology, and in particular to a double-pole mutually exclusive three-position electric disconnect switch and disconnect switch cabinet. Background Technology

[0002] With the continuous development of power systems, disconnect switches, as important switching and isolating devices in primary power equipment, are widely used in transmission and transformation lines, power distribution systems, and industrial electrical equipment. In medium and high voltage systems, disconnect switches not only perform the basic function of switching circuits on and off, but also play multiple roles such as clear circuit break indication, safety isolation, and electrical interlocking. Traditional manual disconnect switches have low operating efficiency and poor safety. Therefore, in recent years, more and more applications have begun to develop towards electrification and intelligence, and various three-position electric disconnect switch structures have emerged to achieve rapid switching between conduction and isolation, improving operational reliability and remote control capabilities.

[0003] Currently, most common three-position disconnect switches adopt a single-pole structure or a single-pole single-throw configuration, using a single disconnector assembly to switch between the two outgoing positions to achieve circuit conduction and isolation functions. However, in bipolar control requirements, it is often necessary to control the opening and closing relationships of the two circuits separately. Existing technologies typically use two independent single-pole switches connected in parallel to achieve this, but this method has problems such as complex wiring and large structural space occupation.

[0004] Therefore, how to design a compact electric disconnect switch that can achieve dual-pole mutual exclusion control and has three-position selection capability has become a key problem that urgently needs to be solved in this technical field. Utility Model Content

[0005] This application provides a double-pole mutually exclusive three-position electric disconnect switch and disconnect switch cabinet to solve the problem that the existing three-position disconnect switch uses two independent single-pole switch structures and occupies a large space.

[0006] In a first aspect, this application provides a double-pole mutually exclusive three-position electric disconnect switch, including a mounting bracket, an incoming line assembly, a first outgoing line assembly, a second outgoing line assembly, a knife switch assembly, a drive assembly, and an electric operating mechanism;

[0007] The upper part of the mounting frame is equipped with an inlet assembly, and the lower part of the mounting frame is equipped with a first outlet assembly and a second outlet assembly symmetrically distributed front and rear. The lower end of the inlet assembly is rotatably connected to a knife switch assembly. The knife switch assembly is connected to a drive assembly and can rotate under the drive assembly. The drive assembly is located behind the inlet assembly and is mounted on the mounting frame. The electric operating mechanism is fixedly mounted on the outside of the mounting frame and connected to the drive assembly. It is used to operate the drive assembly by a motor drive to achieve selective contact connection between the knife switch assembly and the first outlet assembly and the second outlet assembly.

[0008] The incoming line assembly includes a first incoming line position and a second incoming line position. The disconnector assembly includes a first disconnector rotatably connected to the lower part of the first incoming line position and a second disconnector rotatably connected to the lower part of the second incoming line position. The first outgoing line assembly includes a first outgoing line position and a second outgoing line position. The second outgoing line assembly includes a third outgoing line position corresponding to the front and rear of the first outgoing line position and a fourth outgoing line position corresponding to the front and rear of the second outgoing line position. The first disconnector can selectively contact and connect to the first outgoing line position or the third outgoing line position or a first isolation position located between the first outgoing line position and the third outgoing line position under the drive of the drive assembly. The second disconnector can selectively contact and connect to the second outgoing line position or the fourth outgoing line position or a second isolation position located between the second outgoing line position and the fourth outgoing line position under the drive of the drive assembly.

[0009] In one optional embodiment, the drive assembly includes a main shaft and a mutually exclusive main shaft, a meshing gear set, a first pull rod, and a second pull rod. The main shaft is hinged to a first knife switch via the first pull rod, and the mutually exclusive main shaft is hinged to a second knife switch via the second pull rod. The main shaft and the mutually exclusive main shaft are arranged in parallel and mesh with each other through the meshing gear set. The main shaft is connected to an electric operating mechanism. When the main shaft rotates under the drive of the electric operating mechanism, the first knife switch and the second knife switch can rotate synchronously in opposite directions, realizing the mutually exclusive switching of the first knife switch and the second knife switch between three positions.

[0010] In one optional embodiment, the electric operating mechanism includes an operating box, a motor, a friction clutch, a transmission assembly, and a sliding seat. The motor is housed within the operating box and connected to the transmission assembly via the friction clutch. The transmission assembly is a lead screw drive, comprising a lead screw and a bearing seat mounted within the operating box. One end of the lead screw is connected to the friction clutch, and the other end is supported by the bearing seat and can rotate freely within the operating box. The sliding seat is threaded onto the lead screw and can slide axially along the lead screw as the lead screw rotates. An eccentric linkage block is movably connected to the sliding seat, and a connecting shaft is provided on the eccentric linkage block. The eccentric linkage block drives the connecting shaft to rotate during the movement of the sliding seat along the lead screw axially. The connecting shaft is connected to the main shaft in the drive assembly and can drive the main shaft to rotate.

[0011] In one optional embodiment, the meshing gear set includes a first gear fixed on the main shaft and a second gear fixed on the mutually exclusive main shaft. The first gear and the second gear mesh axially in parallel and are able to cause the main shaft and the mutually exclusive main shaft to rotate synchronously in opposite directions when rotating.

[0012] In one optional embodiment, the mounting bracket is provided with a limiting component, the limiting component including a limiting block and a limiting sleeve;

[0013] The limiting sleeve is fixedly fitted onto the main shaft and can rotate with the main shaft. The limiting sleeve is provided with a limiting post. The limiting block is fixedly installed on the mounting bracket. The limiting block is provided with a limiting bolt. When the main shaft rotates to a preset conduction angle, the limiting post and the limiting bolt contact each other to limit the rotation stroke of the main shaft. The other end of the main shaft extends out of the mounting bracket and is provided with a limiting cam. A limit switch is fixedly installed on the outside of the mounting bracket, and the sensing part of the limit switch faces the limiting cam. When the main shaft rotates to the isolation position, the limiting cam can trigger the limit switch to act. The limit switch can be used to cut off the power control of the electric operating mechanism and trigger the brake to act, so that the knife switch assembly stops in the isolation position.

[0014] In one optional embodiment, the first and second input positions of the input assembly are respectively connected to input connection copper busbars, the first and second output positions of the first output assembly are respectively connected to first output copper busbars, and the third and fourth output positions of the second output assembly are respectively connected to second output copper busbars; both the first and second disconnect switches adopt blade-type contact structures.

[0015] In one optional embodiment, the incoming line connecting copper busbar, the first outgoing line copper busbar, the second outgoing line copper busbar, the first connecting copper busbar, the second connecting copper busbar, the first disconnect switch, and the second disconnect switch are all made of T2 copper material, and their surfaces are provided with a silver plating layer.

[0016] In one optional embodiment, a plurality of supporting insulators are fixedly mounted on the mounting frame for positioning and mounting each incoming and outgoing line position.

[0017] On the other hand, this application also provides a double-pole electric mutually exclusive three-position disconnect switch cabinet, including a cabinet and a disconnect switch assembly installed in the cabinet, wherein the disconnect switch assembly is the double-pole mutually exclusive three-position electric disconnect switch provided in this application.

[0018] In one alternative implementation, an observation window is provided on the front door of the cabinet to facilitate observation of the open / closed status of the knife switch assembly.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] 1. The double-pole mutually exclusive three-position electric disconnect switch provided in this application has an inlet assembly at the top of the mounting frame and a first outlet assembly and a second outlet assembly at the bottom. The structure is hierarchically divided in the vertical direction. The first outlet assembly and the second outlet assembly are arranged symmetrically in the front-to-back direction. Moreover, by integrating two sets of inlet positions and four outlet positions on one mounting frame, a double-pole symmetrical layout disconnect switch structure is constructed. This not only helps to improve space utilization efficiency but also facilitates the rational lead-out and fixing of wires. Furthermore, the inlet and outlet positions are located in different areas, with clear structural partitioning, which helps to reduce interference and misconnection risks caused by wire crossing. Compared with the traditional split structure of double-pole disconnect switches, this structure achieves a double-pole parallel configuration in one device, making the control structure of the two poles more compact, significantly reducing installation space, optimizing structural integration, and is more suitable for modular integration in compact electrical systems, which helps to improve installation convenience.

[0021] 2. In terms of the operating structure, the first disconnect switch is connected to the first incoming line position, while the second disconnect switch is connected to the second incoming line position; the two are arranged relatively independently. Although the two sets of disconnect switches belong to different poles, they are both mechanically connected to the same drive assembly, which is located at the rear of the mounting bracket, thus maintaining a compact structure. The electric operating mechanism operates the drive assembly via a motor to achieve selective contact between the disconnect switch assembly and the first and second outgoing line assemblies. During operation, the two disconnect switches can complete synchronous switching at the same rhythm. This linkage design helps reduce the response difference between the two poles and reduces positioning deviation problems caused by asynchronous transmission.

[0022] 3. The first disconnect switch of this application can rotate between the first and third outgoing positions to selectively connect, while the second disconnect switch can rotate between the second and fourth outgoing positions to achieve connection. When the disconnect switch is in the position between the front and rear outgoing positions, it can form an electrical isolation state. This structure enables the disconnect switch to achieve a three-position structure design, so that each disconnect switch has two conducting points and one disconnecting point. On-site personnel can intuitively judge the operating status based on the position of the disconnect switch. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a bipolar mutually exclusive three-position electrically operated disconnector provided in an embodiment of this application;

[0025] Figure 2 A schematic diagram from another perspective of a bipolar mutually exclusive three-position electrically operated disconnector provided in an embodiment of this application;

[0026] Figure 3 A schematic diagram of a driving component provided in an embodiment of this application;

[0027] Figure 4 A schematic diagram of a limiting component provided in an embodiment of this application on a mounting bracket;

[0028] Figure 5 This is a schematic diagram of the internal structure of the control box of an electric operating mechanism provided in an embodiment of this application;

[0029] Figure 6 A schematic diagram of the structure of a bipolar mutually exclusive three-position electrically operated disconnector provided in another embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the structure of a bipolar mutually exclusive three-position electrically disconnecting switchgear provided in an embodiment of this application.

[0031] In the picture:

[0032] 100-Mounting bracket; 101-Support insulator; 200-Incoming line assembly; 201-First incoming line position; 202-Second incoming line position; 300-First outgoing line assembly; 301-First outgoing line position; 302-Second outgoing line position; 400-Second outgoing line assembly; 401-Third outgoing line position; 402-Fourth outgoing line position; 500-Knife switch assembly; 510-First knife switch; 520-Second knife switch; 600-Drive assembly; 610-Main spindle; 620-Mutual exclusion main spindle; 630 - Meshing gear set; 631 - First gear; 632 - Second gear; 640 - First pull rod; 650 - Second pull rod; 700 - Electric operating mechanism; 710 - Operating box; 720 - Motor; 730 - Friction clutch; 740 - Transmission assembly; 741 - Lead screw; 742 - Bearing seat; 750 - Sliding seat; 751 - Eccentric linkage block; 752 - Connecting shaft; 800 - Limiting assembly; 810 - Limiting stop; 811 - Limiting bolt; 820 - Limiting sleeve; 821 - Limiting post; 830 - Limiting switch; 840 - Limiting cam; 901 - Inlet copper busbar; 902 - First outlet copper busbar; 903 - Second outlet copper busbar; 10 - Cabinet; 1001 - Observation window. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly 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. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Please see Figures 1-7 , Figure 1 This is a schematic diagram of the structure of a bipolar mutually exclusive three-position electrically operated disconnector provided in an embodiment of this application; Figure 2 A schematic diagram from another perspective of a bipolar mutually exclusive three-position electrically operated disconnector provided in an embodiment of this application; Figure 3 A schematic diagram of a driving component provided in an embodiment of this application; Figure 4 A schematic diagram of a limiting component provided in an embodiment of this application on a mounting bracket; Figure 5 This is a schematic diagram of the internal structure of the control box of an electric operating mechanism provided in an embodiment of this application; Figure 6 A schematic diagram of the structure of a bipolar mutually exclusive three-position electrically operated disconnector provided in another embodiment of this application; Figure 7 This is a schematic diagram of the structure of a bipolar mutually exclusive three-position electrically disconnecting switchgear provided in an embodiment of this application.

[0038] like Figures 1-6As shown in the figure, this application embodiment provides a double-pole mutually exclusive three-position electric disconnect switch, including a mounting bracket 100, an incoming line assembly 200, a first outgoing line assembly 300, a second outgoing line assembly 400, a knife switch assembly 500, a drive assembly 600, and an electric operating mechanism 700.

[0039] An inlet assembly 200 is mounted on the upper part of the mounting bracket 100, and a first outlet assembly 300 and a second outlet assembly 400 are symmetrically distributed on the lower part of the mounting bracket 100. A knife switch assembly 500 is rotatably connected to the lower end of the inlet assembly 200. The knife switch assembly 500 is connected to the drive assembly 600 and can rotate under the drive of the drive assembly 600. The drive assembly 600 is located behind the inlet assembly 200 and is mounted on the mounting bracket 100. An electric operating mechanism 700 is fixedly mounted on the outside of the mounting bracket 100 and connected to the drive assembly 600. It is used to operate the drive assembly 600 by motor drive to achieve selective contact connection between the knife switch assembly 500 and the first outlet assembly 300 and the second outlet assembly 400.

[0040] Furthermore, the incoming line assembly 200 includes a first incoming line position 201 and a second incoming line position 202; the disconnector assembly 500 includes a first disconnector 510 rotatably connected to the lower part of the first incoming line position 201 and a second disconnector 520 rotatably connected to the lower part of the second incoming line position 202; the first outgoing line assembly 300 includes a first outgoing line position 301 and a second outgoing line position 302; and the second outgoing line assembly 400 includes a third outgoing line position 401 corresponding to the front and rear of the first outgoing line position 301 and a second outgoing line position 402 corresponding to the second outgoing line position 302. The fourth outgoing position 402 corresponding to 02, the first knife switch 510 can selectively contact the first outgoing position 301 or the third outgoing position 401 or the first isolation position located between the first outgoing position 301 and the third outgoing position 401 under the drive of the drive component 600, and the second knife switch 520 can selectively contact the second outgoing position 302 or the fourth outgoing position 402 or the second isolation position located between the second outgoing position 302 and the fourth outgoing position 402 under the drive of the drive component 600.

[0041] In this embodiment, the upper part of the mounting frame 100 is provided with an inlet assembly 200, and the lower part is arranged with a first outlet assembly 300 and a second outlet assembly 400. The structure is divided into layers in the vertical direction. The first outlet assembly 300 and the second outlet assembly 400 are arranged symmetrically in the front-to-back direction. Moreover, by integrating two sets of inlet positions and four outlet positions on one mounting frame 100, a bipolar symmetrical layout disconnector structure is constructed. This not only helps to improve the space utilization efficiency, but also facilitates the reasonable lead-out and fixation of wires. In addition, the inlet and outlet positions are located in different areas, and the structural partitioning is clear, which helps to reduce the interference and misconnection risks caused by wire crossing. Compared with the traditional split structure of bipolar disconnector, this structure realizes the parallel configuration of double poles in one device, making the control structure of the two poles more compact, significantly reducing the installation space, optimizing the structural integration, and is more suitable for modular integration in compact electrical systems, which helps to improve the ease of installation.

[0042] In terms of the operating structure, the first disconnect switch 510 is connected to the first incoming line position 201, while the second disconnect switch 520 is connected to the second incoming line position 202; the two are arranged relatively independently. Although the two sets of disconnect switches belong to different poles, they are both mechanically connected to the same drive assembly 600, which is located at the rear of the mounting bracket 100, thus maintaining a compact structure. The electric operating mechanism 700 operates the drive assembly 600 via a motor to achieve selective contact between the disconnect switch assembly 500 and the first outgoing line assembly 300 and the second outgoing line assembly 400. During operation, the two disconnect switches can complete synchronous switching at the same rhythm. This linkage design helps reduce the response difference between the two poles and reduces the positioning deviation problem caused by asynchronous transmission.

[0043] In terms of switching path settings, the first disconnector 510 can rotate between the first outgoing position 301 and the third outgoing position 401 to selectively connect, while the second disconnector 520 can rotate between the second outgoing position 302 and the fourth outgoing position 402 to achieve connection. When the disconnector is in the position between the front and rear outgoing positions, it can form an electrical isolation state. This structure enables the disconnector to achieve a three-position structure design, so that each disconnector is set as a three-position control mechanism, that is, under the drive of the drive component 600, it can rotate to the front outgoing position, the rear outgoing position, or the intermediate isolation position between the two, so that each disconnector has two conduction points and one disconnection point. On-site personnel can intuitively judge the operating status based on the position of the disconnector.

[0044] In some embodiments, the drive assembly 600 includes a main shaft 610 and a mutually exclusive main shaft 620, a meshing gear set 630, a first pull rod 640 and a second pull rod 650. The main shaft 610 is hinged to the first knife switch 510 via the first pull rod 640, and the mutually exclusive main shaft 620 is hinged to the second knife switch 520 via the second pull rod 650. The main shaft 610 and the mutually exclusive main shaft 620 are arranged in parallel and mesh with each other through the meshing gear set 630. The main shaft 610 is connected to the electric operating mechanism 700. When the main shaft 610 rotates under the drive of the electric operating mechanism 700, the first knife switch 510 and the second knife switch 520 can rotate synchronously in opposite directions, realizing the mutually exclusive switching of the first knife switch 510 and the second knife switch 520 between three positions.

[0045] In the above embodiment, the main shaft 610 and the mutually exclusive main shaft 620 of the drive assembly 600 are arranged in parallel to each other and synchronously transmitted through a meshing gear set 630. Compared with the traditional single-shaft drive structure, this structure is easier to achieve bipolar linkage operation in compact equipment. The main shaft 610 is connected to the electric operating mechanism 700 and rotates under the action of the motor. At the same time, it drives the mutually exclusive main shaft 620 to rotate in the opposite direction through the meshing gear set 630. It has the advantages of short transmission path, compact structure and more direct overall mechanical response, thus making it more stable during operation. Meanwhile, the main shaft 610 and the first knife switch 510 are hinged together by the first tie rod 640, and the mutually exclusive main shaft 620 and the second knife switch 520 are hinged together by the second tie rod 650. This connection method can complete the action transmission well. The two knife switches rotate independently under the drive of their respective main shafts. The motion path is clear and interference or misalignment is not easy to occur. The overall structure is conducive to later maintenance. Moreover, the structure is clear and the connection is reasonable. It can have a more stable performance under long-term operation conditions.

[0046] Furthermore, in this embodiment, through the meshing of the gear set 630, the main shaft 610 and the mutually exclusive main shaft 620 are in a reverse linkage state throughout the switching process. The first disconnect switch 510 and the second disconnect switch 520 are controlled by their respective main shafts, and they always maintain a mutually exclusive relationship during operation. That is, when one set of disconnect switches completes the conduction action from the isolation position to the target outgoing position (such as the outgoing position in front), the other set of disconnect switches will move in the opposite direction synchronously and transition to another outgoing position (i.e., the outgoing position in the rear). This helps to clearly distinguish between the bipolar states and reduce the probability of accidental closing or operational conflicts. In terms of structural control, the three-position operation can be completed sequentially by the unidirectional rotation of the main shaft 610. The electric operating mechanism 700 can complete the complete cycle of conduction-isolation-conduction by controlling the rotation direction, simplifying the electrical control logic and facilitating its use with automation systems. It is suitable for power distribution scenarios with high requirements for control specifications.

[0047] In some embodiments, the electric operating mechanism 700 includes an operating box 710, a motor 720, a friction clutch 730, a transmission assembly 740, and a sliding seat 750. The motor 720 is disposed in the operating box 710 and connected to the transmission assembly 740 via the friction clutch 730. The transmission assembly 740 adopts a lead screw drive form, and includes a lead screw 741 and a bearing seat 742 installed in the operating box 710. One end of the lead screw 741 is connected to the friction clutch 730, and the other end is supported by the bearing seat 742 and can... The sliding seat 750 is freely rotated within the control box 710; the sliding seat 750 is threadedly fitted onto the lead screw 741 and can slide along the axial direction of the lead screw 741 as the lead screw 741 rotates; an eccentric linkage block 751 is movably connected to the sliding seat 750, and a connecting shaft 752 is provided on the eccentric linkage block 751. The eccentric linkage block 751 is used to drive the connecting shaft 752 to rotate during the movement of the sliding seat 750 along the axial direction of the lead screw 741. The connecting shaft 752 is connected to the main shaft 610 in the drive assembly 600 and can drive the main shaft 610 to rotate.

[0048] In this embodiment, the electric operating mechanism 700 has an independently configured operating box 710. The motor 720 is installed inside the operating box 710 and connected to the transmission assembly 740 via a friction clutch 730. The friction clutch 730 can release excess torque when the load is abnormal or rotation is obstructed, providing a certain buffering effect and helping to reduce the risk of component damage caused by impact. The transmission assembly 740 adopts a lead screw drive. The lead screw 741 is supported and fixed inside the operating box 710 by a bearing seat 742. The structure is compact and the force transmission path is clear. The linear propulsion action brought about by the rotation of the lead screw 741 helps to achieve precise and adjustable control stroke within a confined space, thereby controlling the rhythm of the action and stabilizing the transmission process. The sliding seat 750 is installed in conjunction with the lead screw 741 through a threaded structure. Under the rotation of the lead screw 741, the sliding seat 750 moves along its axial direction. The movement of the sliding block 750 is indirectly controlled by the motor 720. An eccentric linkage block 751 is movably connected to the sliding block 750. During the sliding process, the eccentric linkage block 751 shifts, and the linear motion is converted into rotational motion through the connecting shaft 752 on it, thus realizing power conversion. Compared with conventional linkage or gear structures, the combination of the lead screw 741 and the sliding block 750 performs better in terms of speed control and smoothness.

[0049] Meanwhile, in the above embodiment, the connecting shaft 752 is directly connected to the main shaft 610 within the drive assembly 600, and the main shaft 610 can respond to the action as the connecting shaft 752 rotates. The eccentric linkage block 751 changes its eccentric angle when the sliding seat 750 moves, causing the connecting shaft 752 to rotate. The rotation angle of the main shaft 610 is controlled by the sliding distance. This clearly defined linkage structure helps to set the target position of the main shaft 610 by adjusting the motor rotation angle in actual use; moreover, the overall action process is relatively smooth, and the response speed and consistency of the knife switch assembly 500 are good.

[0050] In some embodiments, the meshing gear set 630 includes a first gear 631 fixed on the main shaft 610 and a second gear 632 fixed on the mutually exclusive main shaft 620. The first gear 631 and the second gear 632 mesh axially in parallel and are able to make the main shaft 610 and the mutually exclusive main shaft 620 rotate synchronously in opposite directions when rotating.

[0051] In this embodiment, the main shaft 610 and the mutually exclusive main shaft 620 are respectively provided with a first gear 631 and a second gear 632. The two gears are arranged parallel in the axial direction and form a linkage relationship through meshing, which facilitates synchronous control during rotation. The first gear 631 and the second gear 632 are respectively fixed on the corresponding main shafts, eliminating the need for intermediate connecting parts. This structure is suitable for integrated use in situations where the horizontal direction is limited, and provides space convenience for the arrangement of the switching device.

[0052] During operation, the electric operating mechanism 700 drives the main shaft 610, which is equipped with the first gear 631, to rotate. The meshing action between the gears causes the second gear 632 to rotate in the opposite direction, and the mutually exclusive main shaft 620 also responds in the opposite direction. The two main shafts (i.e., main shaft 610 and mutually exclusive main shaft 620) move simultaneously in opposite directions, maintaining a symmetrical operating rhythm. The gears are rigidly meshed, and the rotational force is directly transmitted, thereby reducing the possibility of slippage or lag. This structure helps maintain the corresponding action of the bipolar disconnect switch during the switching process and reduces the risk of accidental closing due to poor synchronization.

[0053] In some embodiments, a limiting component 800 is provided on the mounting bracket 100, the limiting component 800 including a limiting block 810 and a limiting sleeve 820;

[0054] The limiting sleeve 820 is fixedly sleeved on the main shaft 610 and can rotate with the main shaft. The limiting sleeve 820 is provided with a limiting post 821. The limiting block 810 is fixedly installed on the mounting bracket 100. The limiting block 810 is provided with a limiting bolt 811. When the main shaft 610 rotates to the preset conduction angle, the limiting post 821 and the limiting bolt 811 contact each other to limit the rotation stroke of the main shaft 610. The other end of the main shaft 610 extends out of the mounting bracket 100 and is provided with a limiting cam 840. A limit switch 830 is fixedly installed on the outside of the mounting bracket 100 and the sensing part of the limit switch 830 faces the limiting cam 840. When the main shaft 610 rotates to the isolation position, the limiting cam 840 can trigger the limit switch 830 to act. The limit switch 830 can be used to cut off the power control of the electric operating mechanism 700 and trigger the brake to act so that the knife switch assembly 500 stops in the isolation position.

[0055] In this embodiment, the spindle 610 is provided with a limiting sleeve 820, and a limiting post 821 is fixedly installed on the limiting sleeve 820. This limiting post 821 works in conjunction with the limiting stop 810 and the limiting bolt 811 on the mounting bracket 100 to form a travel limiting mechanism. When the spindle 610 rotates to a preset angle, the limiting post 821 contacts the limiting bolt 811, thereby limiting the spindle 610 from continuing to rotate. The installation position of the limiting bolt 811 can be adjusted according to different working conditions to adapt to specific conduction intervals. This structure does not rely on elastic elements or complex mechanical interlocks; the action is clear, the contact is well-defined, and it helps to ensure that the knife switch action terminates promptly at the designated position.

[0056] Meanwhile, in this embodiment, a limiting cam 840 is provided at the other end of the main shaft 610 after passing through the mounting bracket 100. As the main shaft 610 rotates, the position of the limiting cam 840 shifts at an angle. A limit switch 830 is provided outside the mounting bracket 100, with its sensing end facing the limiting cam 840. When the main shaft 610 rotates to the intermediate isolation position, the limiting cam 840 triggers the limit switch 830, forming a clear action signal feedback. This mechanical triggering method is more reliable and the response action is more timely, which can reduce the probability of misjudgment caused by transmission lag, position deviation, etc., and provides a more stable guarantee for the identification of the knife switch in the isolation position. In practical applications, when the main shaft 610 rotates to the intermediate isolation position, the limiting cam 840 will trigger the limit switch 830. At this time, the power supply circuit of the electric operating mechanism 700 is temporarily interrupted by the control system, the internal brake is activated, and the main shaft 610 stops rotating in a short time, and the knife switch assembly 500 quickly and stably stops in the isolation position. This structure can improve the reliability of state determination and the accuracy of physical execution during the switching process through a coordinated mechanism of "mechanical limit + limit switch signal + power control + braking execution".

[0057] It should be further clarified that reaching the isolation position does not mean the electric system has completely stopped. In practical applications, upon receiving a new switching command, such as switching from the isolated state to another set of outgoing line positions, the control system will restore power to the electric operating mechanism 700 and release the braking state. Subsequently, the motor 720 restarts, driving the main shaft 610 again through the transmission structure, realizing the transition of the disconnector assembly 500 from the isolated position to the target outgoing line position. This method facilitates meeting the needs of multiple switching in complex operating scenarios, improving the adaptability and reliability of the equipment in automated power distribution systems. In practical applications, the control logic of the electric operating mechanism 700 can be configured according to the usage requirements. This application focuses not on the internal program implementation of the control system, but on the overall structural design of the disconnector and its mechanical implementation path for achieving mutually exclusive switching of three positions through the electric operating mechanism 700. In this embodiment, the switching action is completed by the mechanical cooperation between components such as the motor 720, lead screw 741, sliding seat 750, eccentric linkage block 751 and main shaft 610. The control system only serves as the input source of the action trigger signal. The actual action process is realized by the cooperation of the above structures and does not depend on any specific software control logic.

[0058] In some embodiments, the first input position 201 and the second input position 202 of the input assembly 200 are respectively connected to the input copper busbar 901, the first output position 301 and the second output position 302 of the first output assembly 300 are respectively connected to the first output copper busbar 902, and the third output position 401 and the fourth output position 402 of the second output assembly 400 are respectively connected to the second output copper busbar 903; the first knife switch 510 and the second knife switch 520 both adopt the blade contact structure.

[0059] In this embodiment, the first incoming line position 201 and the second incoming line position 202 are respectively connected to the incoming line connecting copper busbar 901, the first outgoing line position 301 and the second outgoing line position 302 correspond to the first outgoing line copper busbar 902, and the third outgoing line position 401 and the fourth outgoing line position 402 are respectively connected to the second outgoing line copper busbar 903. In this way, the conductive path is simplified, and each incoming and outgoing line position corresponds one-to-one with the corresponding copper busbar, which is beneficial for identification and wiring. For the installation and maintenance process, the structural layout is intuitive and clear, which makes it convenient for construction personnel to quickly complete wiring and testing operations on site, which helps to improve the overall installation efficiency and reduce the probability of errors.

[0060] Furthermore, in this embodiment, both the first knife switch 510 and the second knife switch 520 adopt a blade-type contact structure. This type of structure has a simple shape and a relatively large contact area, allowing for rapid connection or disconnection with the copper busbar during rotation. The direct contact action facilitates obtaining a clear electrical on / off state and reduces the probability of contact floating or incomplete contact.

[0061] In some embodiments, the incoming line connecting copper busbar 901, the first outgoing line copper busbar 902, the second outgoing line copper busbar 903, the first knife switch 510, and the second knife switch 520 are all made of T2 copper material, and their surfaces are provided with a silver plating layer.

[0062] Building upon the aforementioned basic structure, this embodiment further clarifies that the incoming copper busbar 901, the first outgoing copper busbar 902, the second outgoing copper busbar 903, and the first and second disconnect switches 510 and 520 are made of T2 copper, with a silver-plated layer covering their surfaces. T2 copper, as a high-purity electrolytic copper, possesses good conductivity and processing stability, making it suitable for use as a high-current conductor. Furthermore, its low bulk resistivity helps reduce power consumption in the current path, maintaining a relatively stable transmission state during long-term current operation, thus positively impacting the energy efficiency of the entire conductive system. Moreover, the use of a uniform material for all conductive copper busbars and disconnect switch assemblies ensures consistency in thermal expansion characteristics.

[0063] Furthermore, both the copper busbar and the disconnector are plated with a silver layer, which reduces contact resistance in the contact area during use, helping to mitigate the accumulation of heat caused by contact heating. Simultaneously, the silver layer possesses a certain degree of oxidation resistance, delaying the formation of a surface oxide film and improving the electrical contact stability of the contacts under long-term operating conditions. Especially under operating conditions of high humidity or frequent switching, this structure plays a positive role in improving the conduction reliability and contact life of the disconnector.

[0064] In some embodiments, a plurality of support insulators 101 are fixedly disposed on the mounting bracket 100 for positioning and installing each inlet and outlet position.

[0065] In this embodiment, the mounting frame 100 is provided with a plurality of supporting insulators 101 for structural positioning and fixing of the incoming and outgoing lines, thereby providing support and isolation functions in both mechanical and electrical aspects. The supporting insulators 101 have strong insulation performance and can form an effective electrical isolation zone, which helps to reduce the abnormal risks caused by leakage, creepage, or partial breakdown, and improves safety during use.

[0066] On the other hand, such as Figure 7 As shown in the figure, this application embodiment also provides a double-pole electric mutually exclusive three-position disconnect switch cabinet, including a cabinet 10 and a disconnect switch assembly installed in the cabinet 10. The disconnect switch assembly used is the double-pole mutually exclusive three-position electric disconnect switch given in the above-mentioned application embodiment.

[0067] In this embodiment, the bipolar mutually exclusive three-position electric disconnect switch is integrated as a complete functional module inside the cabinet 10, forming an integrated disconnect switch cabinet structure. This modular layout allows the switch assembly to operate in a controlled switch cabinet environment. The cabinet 10 provides mechanical protection while also forming an electrical isolation layer, preventing external dust, moisture, and other foreign objects from entering, thereby enhancing the device's adaptability to various operating environments. During use, the disconnect switch of this application can be installed entirely into the cabinet 10. The cabinet 10 can be equipped with external unified interfaces, inspection doors, and observation windows, as per the conventional configuration of disconnect switch cabinets, facilitating users to check the status of key components, perform routine maintenance, or diagnose faults during operation.

[0068] In some embodiments, an observation window 1001 is provided on the front door of the cabinet 10 to facilitate observation of the open / closed state of the knife switch assembly 500.

[0069] In the above embodiment, an observation window 1001 is added to the front door of the cabinet 10, so that the operator can visually judge the disconnection or conduction status of the knife switch assembly 500 without opening the cabinet door. This makes the equipment status judgment more intuitive, especially in daily inspection or anomaly troubleshooting scenarios, and helps to quickly grasp the on / off status of the device.

[0070] The observation window 1001 can be made of transparent material and installed on the cabinet door near the knife switch assembly. This design allows operators to obtain critical information from a safe distance without touching internal live components, thereby reducing electrical risks caused by accidental contact or misoperation. In applications requiring frequent checks of the knife switch status, this window design also reduces the number of times the cabinet door is opened and closed, thus reducing the impact of moisture intrusion and dust accumulation on internal electrical components and delaying insulation degradation.

[0071] The method of using the double-pole mutually exclusive three-position electrically operated disconnector provided in this application embodiment is as follows:

[0072] Before being put into use, the disconnecting switch can be installed inside the cabinet 10 of the disconnecting switch cabinet, and the electrical connection operations can be completed sequentially. After the connection operation is completed, close the front door of the cabinet 10, and the initial position of the knife switch assembly 500 can be directly viewed through the observation window 1001 to confirm whether it is in the isolated state. Before operation, the operator can start the electric operating mechanism 700 through the control system or control panel. After the motor 720 starts, it drives the lead screw 741 to rotate through the friction clutch 730, causing the sliding seat 750 to move axially. The sliding seat pushes the eccentric linkage block 751 to move, which in turn drives the main shaft 610 to rotate through the connecting shaft 752. The main shaft 610 drives the first knife switch 510 to move towards the target outlet position through the first pull rod 640, and at the same time, it drives the mutually exclusive main shaft 620 to rotate in the opposite direction through the meshing gear set 630, driving the second knife switch 520 to move in the opposite direction, completing the bipolar mutually exclusive switching process.

[0073] According to usage requirements, the knife switch assembly 500 can selectively connect the corresponding outgoing positions of the first outgoing component 300 or the second outgoing component 400, forming a bipolar conduction path. An intermediate isolation position is provided between the two outgoing positions; the knife switch will not contact any outgoing position when passing through this area, thus achieving complete physical disconnection. Throughout the switching process, the limit post 821 and the limit bolt 811 cooperate to limit the rotation range of the knife switch and control its actuation amplitude. When the main shaft 610 rotates to the isolation position, the limit cam 840 will trigger the limit switch 830 to cut off the power supply to the electric mechanism, and simultaneously the brake will engage, keeping the knife switch in the isolation state.

[0074] During operation, operators can visually observe the working status of the disconnect switch through the observation window 1001 on the front door to determine whether it is in the conducting or isolating position. If the switching is not completed or the on / off direction needs to be adjusted, the electric operating mechanism 700 can be operated again to complete the reverse action.

[0075] When maintenance, load replacement, or line repair is required, the electric operating mechanism 700 should be operated first to return the disconnector assembly 500 to the isolation position, disengaging the first disconnector 510 and the second disconnector 520 from all outgoing positions. The main power supply can only be disconnected after confirming the isolation status. After maintenance, it can be put back into use following the original procedures. The double-pole mutually exclusive three-position electric disconnector of this embodiment has a clear structure and simple operation, suitable for various power distribution scenarios requiring both safe isolation and flexible switching.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A bipolar mutually exclusive three-position electrically operated disconnector, characterized in that, It includes a mounting bracket, an incoming line assembly, a first outgoing line assembly, a second outgoing line assembly, a disconnect switch assembly, a drive assembly, and an electric operating mechanism; The upper part of the mounting frame is equipped with an inlet assembly, and the lower part of the mounting frame is equipped with a first outlet assembly and a second outlet assembly symmetrically distributed front and rear. The lower end of the inlet assembly is rotatably connected to a knife switch assembly. The knife switch assembly is connected to a drive assembly and can rotate under the drive assembly. The drive assembly is located behind the inlet assembly and is mounted on the mounting frame. The electric operating mechanism is fixedly mounted on the outside of the mounting frame and connected to the drive assembly. It is used to operate the drive assembly by a motor drive to achieve selective contact connection between the knife switch assembly and the first outlet assembly and the second outlet assembly. The incoming line assembly includes a first incoming line position and a second incoming line position. The disconnector assembly includes a first disconnector rotatably connected to the lower part of the first incoming line position and a second disconnector rotatably connected to the lower part of the second incoming line position. The first outgoing line assembly includes a first outgoing line position and a second outgoing line position. The second outgoing line assembly includes a third outgoing line position corresponding to the front and rear of the first outgoing line position and a fourth outgoing line position corresponding to the front and rear of the second outgoing line position. The first disconnector can selectively contact and connect to the first outgoing line position or the third outgoing line position or a first isolation position located between the first outgoing line position and the third outgoing line position under the drive of the drive assembly. The second disconnector can selectively contact and connect to the second outgoing line position or the fourth outgoing line position or a second isolation position located between the second outgoing line position and the fourth outgoing line position under the drive of the drive assembly.

2. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 1, characterized in that, The drive assembly includes a main shaft and a mutually exclusive main shaft, a meshing gear set, a first pull rod, and a second pull rod. The main shaft is hinged to a first knife switch via the first pull rod, and the mutually exclusive main shaft is hinged to a second knife switch via the second pull rod. The main shaft and the mutually exclusive main shaft are arranged in parallel and mesh with each other through the meshing gear set. The main shaft is connected to an electric operating mechanism. When the main shaft rotates under the drive of the electric operating mechanism, the first knife switch and the second knife switch can rotate synchronously in opposite directions, realizing the mutually exclusive switching of the first knife switch and the second knife switch between three positions.

3. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 2, characterized in that, The electric operating mechanism includes an operating box, a motor, a friction clutch, a transmission assembly, and a sliding seat. The motor is housed in the operating box and connected to the transmission assembly via the friction clutch. The transmission assembly is a lead screw drive, comprising a lead screw and a bearing seat mounted in the operating box. One end of the lead screw is connected to the friction clutch, and the other end is supported by the bearing seat and can rotate freely within the operating box. The sliding seat is threaded onto the lead screw and can slide along the axial direction of the lead screw as it rotates. An eccentric linkage block is movably connected to the sliding seat, and a connecting shaft is provided on the eccentric linkage block. The eccentric linkage block drives the connecting shaft to rotate during the movement of the sliding seat along the axial direction of the lead screw. The connecting shaft is connected to the main shaft in the drive assembly and can drive the main shaft to rotate.

4. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 2, characterized in that, The meshing gear set includes a first gear fixed on the main shaft and a second gear fixed on the mutually exclusive main shaft. The first gear and the second gear mesh axially in parallel and can cause the main shaft and the mutually exclusive main shaft to rotate synchronously in opposite directions when rotating.

5. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 2, characterized in that, The mounting bracket is provided with a limiting component, which includes a limiting block and a limiting sleeve; The limiting sleeve is fixedly fitted onto the main shaft and can rotate with the main shaft. The limiting sleeve is provided with a limiting post. The limiting block is fixedly installed on the mounting bracket. The limiting block is provided with a limiting bolt. When the main shaft rotates to a preset conduction angle, the limiting post and the limiting bolt contact each other to limit the rotation stroke of the main shaft. The other end of the main shaft extends out of the mounting bracket and is provided with a limiting cam. A limit switch is fixedly installed on the outside of the mounting bracket, and the sensing part of the limit switch faces the limiting cam. When the main shaft rotates to the isolation position, the limiting cam can trigger the limit switch to act. The limit switch can be used to cut off the power control of the electric operating mechanism and trigger the brake to act, so that the knife switch assembly stops in the isolation position.

6. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 1, characterized in that, The first and second input positions of the input assembly are respectively connected to input copper busbars, the first and second output positions of the first output assembly are respectively connected to first output copper busbars, and the third and fourth output positions of the second output assembly are respectively connected to second output copper busbars; both the first and second disconnect switches adopt blade-type contact structures.

7. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 6, characterized in that, The incoming copper busbar, the first outgoing copper busbar, the second outgoing copper busbar, as well as the first and second disconnect switches are all made of T2 copper and have a silver plating layer on their surface.

8. The bipolar mutually exclusive three-position electrically operated disconnector according to claim 1 or 6, characterized in that, The mounting frame is fixedly equipped with multiple supporting insulators for positioning and installing each incoming and outgoing line position.

9. A double-pole electrically exclusive three-position disconnector switchgear, characterized in that, It includes a cabinet and a disconnector assembly installed inside the cabinet, wherein the disconnector assembly is a bipolar mutually exclusive three-position electric disconnector as described in any one of claims 1 to 8.

10. The bipolar electrically exclusive three-position isolating switchgear according to claim 9, characterized in that, The cabinet has an observation window on its front door for easy observation of the opening and closing status of the knife switch assembly.

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