Closing interlocking device of wind power switch
By adding a bending plate, interlocking plate, and limit plate between the closing half-shaft and the grounding main shaft of the wind turbine switch, the problem of imperfect mechanical interlocking was solved, and mechanical interlocking was realized during power outage maintenance and power restoration, thus eliminating safety hazards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-07
AI Technical Summary
The existing wind power switches have inadequate mechanical interlocking during power outage maintenance and power transmission, posing a safety hazard.
A bending plate, interlocking plate, and limit plate are added between the closing half-shaft and the grounding main shaft of the wind turbine switch. By utilizing the original switch transmission logic, mechanical interlocking is achieved. The rotation of the closing half-shaft is restricted through the cooperation of the interlocking lever and the interlocking plate.
Without altering the original switch layout, the mechanical interlocking function was improved, safety hazards were eliminated, and few new parts were added that were easy to manufacture, without affecting cost or mechanical parameters.
Smart Images
Figure CN224096588U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical switchgear, specifically to a closing interlocking device for a wind power switch. Background Technology
[0002] In recent years, the use of 35kV combined switchgear in the new energy field (photovoltaic and wind power) has shown an increasing trend. This switchgear integrates circuit breakers, disconnectors, and grounding switches, and can replace 35kV switchgear in Huabian transformer enclosures. Because this switchgear integrates isolation and grounding functions, it needs to meet the operational interlocking requirements of the circuit breaker and the isolation and grounding functions, and must have both mechanical and electrical interlocking to meet the "five protections" requirements of the switchgear.
[0003] In existing combined switches, there is no mechanical interlock between the grounding operating shaft and the closing half shaft of the circuit breaker. Especially during power outage maintenance and power restoration, the circuit breaker can be closed freely when the disconnecting switch is open and the grounding switch is closed, or when the disconnecting switch is open and the grounding switch is closed.
[0004] In summary, the existing switches have imperfect mechanical interlocking, which cannot achieve mechanical interlocking during power outage maintenance and power restoration, posing safety hazards during use. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a closing interlocking device for wind power switches, which solves the technical problem that the mechanical interlocking of the current switches is imperfect, and cannot realize the mechanical interlocking of the switches during power outage maintenance and power supply, which poses a safety hazard during use.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A closing interlocking device for a wind turbine switch is provided, comprising:
[0008] A frame, on which an operating spindle, an isolation spindle, and a grounding spindle are mounted, the grounding spindle and the isolation spindle being connected by a connecting rod; and
[0009] The circuit breaker operating mechanism is located at the front end of the frame, and the circuit breaker operating mechanism includes...
[0010] A closing half-shaft is provided with a bent plate. During the closing operation, the closing half-shaft drives the bent plate to rotate clockwise.
[0011] An interlocking lever, the lower end of which is fixedly connected to the grounding main shaft, and the upper end of which has a first sliding groove;
[0012] An interlocking plate has a second sliding groove at its upper end, which is sleeved on the closing half shaft. A connecting pin is provided at its lower end, and the connecting pin passes through the first sliding groove.
[0013] A limiting plate, which is fixedly mounted on the interlocking plate;
[0014] When the grounding main shaft rotates counterclockwise to close the grounding circuit, the interlocking lever drives the interlocking plate and the limit plate to move upward. The upper end of the limit plate abuts against the bent plate, thereby restricting the closing half shaft from rotating to close.
[0015] When the grounding main shaft rotates clockwise to perform grounding tripping, the interlocking plate drives the limit plate to disengage from the bending plate, and the closing half shaft performs the closing operation.
[0016] Furthermore, the circuit breaker operating mechanism is provided with a switch panel at the front end, and an interlocking shaft for opening and closing the cabinet door is provided on the inner side of the switch panel. The interlocking shaft moves laterally left and right on the inner side of the switch panel.
[0017] A third sliding groove is provided on the interlocking shaft, the connecting pin passes through the interlocking shaft and the third sliding groove in a forward and backward direction, and the upper end of the interlocking lever passes through the third sliding groove.
[0018] When the grounding main shaft rotates counterclockwise to close the grounding circuit, the interlocking lever drives the interlocking shaft to move laterally to the left, at which point the cabinet door unlocks.
[0019] When the grounding main shaft rotates clockwise to trip the grounding switch, the interlocking lever drives the interlocking shaft to move laterally to the right, at which point the cabinet door locks.
[0020] Furthermore, a pair of spacers are provided on the closing half-shaft, and the upper end of the interlocking plate is located between the two spacers.
[0021] Furthermore, the bent plate is an L-shaped plate.
[0022] Furthermore, the limiting plate is replaced with screws.
[0023] The beneficial effects of this utility model are:
[0024] Without changing the original switch layout, only a bending plate, interlocking plate, and limit plate were added between the closing half shaft and the grounding main shaft. By borrowing the original switch transmission logic, the mechanical interlocking function of the switch was improved, eliminating the safety hazards of switch operation.
[0025] The number of new parts is very small, and they are all simple sheet metal parts that are easy to mass-produce and will not affect the cost of the switch.
[0026] It does not affect the original layout and assembly of the switch and mechanism, and has no impact on the mechanical parameters of the switch.
[0027] The installation and testing of the newly added interlocking parts do not require any adjustments to the existing production processes. Attached Figure Description
[0028] The present invention will be further described below with reference to the accompanying drawings.
[0029] Figures 1 to 3 This is a schematic diagram of the closing interlocking device for the wind power switch of this utility model;
[0030] Figure 4 This is a schematic diagram of the circuit breaker operating mechanism;
[0031] Figure 5 This is a schematic diagram of the circuit breaker operating mechanism (the limit plate uses screws);
[0032] Figure 6 and Figure 7 It is a structural diagram of the grounding main shaft, interlocking shaft, interlocking plate, and closing half shaft;
[0033] Figure 8 This is a structural diagram of the interlocking lever and the interlocking shaft;
[0034] Figure 9 It is a structural diagram of the cabinet door, interlocking shaft, and interlocking plate;
[0035] Among them, 1. Frame, 11. Operating spindle, 12. Isolation spindle, 13. Grounding spindle, 14. Connecting rod, 15. Grounding crank arm, 16. Isolation busbar;
[0036] 2. Circuit breaker operating mechanism, 21. Closing half shaft, 22. Interlocking shaft, 221. Third slide groove, 23. Switch panel;
[0037] 3. Interlocking lever, 31. First slide groove, 4. Interlocking plate, 41. Second slide groove, 5. Limiting plate, 6. Bend plate, 61. Spacer, 7. Connecting pin. Detailed Implementation
[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0039] This application provides a closing interlocking device for a wind turbine switch, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.
[0040] To address the technical problem that existing wind turbine switches have imperfect mechanical interlocking mechanisms, failing to achieve mechanical interlocking during power outages for maintenance and power restoration, thus posing safety hazards during use, an embodiment of this application provides a closing interlocking device for wind turbine switches. This is described in detail below.
[0041] like Figures 1 to 9 As shown, a closing interlocking device for a wind power switch includes...
[0042] A frame 11 is provided with an operating spindle 11, an isolation spindle 12 and a grounding spindle 13, and the grounding spindle 13 and the isolation spindle 12 are connected by a connecting rod 14.
[0043] The operating spindle 11, the isolation spindle 12, and the grounding spindle 13 are distributed from top to bottom on the frame 11. Both the grounding spindle 13 and the isolation spindle 12 are equipped with crank arms at their rear ends. The two crank arms are connected by a connecting rod 14 to achieve linkage, thereby realizing the linkage between the grounding spindle 13 and the isolation spindle 12. The grounding spindle 13 is connected to the grounding crank arm 15, and the isolation spindle 12 is connected to the isolation busbar 16. In actual operation, when the grounding spindle 13 performs grounding opening, the connecting rod 14 drives the isolation spindle 12 to perform closing rotation. When the grounding spindle 13 performs grounding closing, the connecting rod 14 drives the isolation spindle 12 to perform opening rotation.
[0044] Circuit breaker operating mechanism 2 is located at the front end of frame 11.
[0045] like Figure 4 and Figure 5 As shown, the circuit breaker operating mechanism 2 includes
[0046] The closing half-shaft 21 is provided with a bent plate 6. During the closing operation, the closing half-shaft 21 drives the bent plate 6 to rotate clockwise.
[0047] Interlocking lever 3, the lower end of which is fixedly connected to the grounding main shaft 13, and the upper end of which is provided with a first sliding groove 31;
[0048] Interlocking plate 4 has a second sliding groove 41 at its upper end, and is sleeved on the closing half shaft 21 through the second sliding groove 41. A connecting pin 7 is provided at its lower end, and the connecting pin 7 passes through the first sliding groove 31.
[0049] Limiting plate 5, which is fixedly mounted on interlocking plate 4;
[0050] When the grounding main shaft 13 rotates counterclockwise to close the grounding circuit, the interlocking lever 3 drives the interlocking plate 4 and the limit plate 5 to move upward. The upper end of the limit plate 5 abuts against the bent plate 6, thereby restricting the closing half shaft 21 from rotating to close.
[0051] When the grounding main shaft 13 rotates clockwise to perform grounding tripping, the interlocking plate 4 drives the limit plate 5 to disengage from the bending plate 6, and the closing half shaft 21 performs the closing operation.
[0052] like Figures 6 to 9 The interlocking lever 3 shown includes a lever body, the lower end of which is a plug-in part. A corresponding plug hole is opened on the grounding main shaft 13. After the plug-in part is inserted into the plug hole, the interlocking lever 3 and the grounding main shaft 13 are fixedly connected. The upper end of the lever body is a flat body, and the first sliding groove 31 is opened on the flat body.
[0053] like Figures 6 to 9 The interlocking plate 4 shown is a sheet metal stamping part. The upper end of the plate has a second sliding groove 41, and the lower end of the plate has a pin hole for installing the connecting pin 7.
[0054] like Figures 6 to 9 The bent plate 6 shown is an L-shaped plate. The vertical plate of the bent plate 6 is fixedly connected to the closing half shaft 21 by screws, and the horizontal plate of the bent plate 6 is used to abut against the limit plate 5.
[0055] Specifically, as an optional implementation method in this embodiment, such as Figure 6 and Figure 7 As shown, a pair of spacers 61 are provided on the closing half-shaft 21, and the upper end of the interlocking plate 4 is located between the two spacers 61. The two spacers 61 are used to restrict the axial movement of the interlocking plate 4. The front spacer 61 abuts against the bent plate 6, restricting the forward movement of the interlocking plate 4, and the rear spacer 61 abuts against the step on the closing half-shaft 21, restricting the backward movement of the spacer 61.
[0056] Specifically, as an optional implementation method in this embodiment, such as Figure 3 As shown, the circuit breaker operating mechanism 2 has a switch panel 23 at its front end. The switch panel 23 is fixed to the housing of the operating mechanism. An interlocking shaft 22 for opening and closing the cabinet door is provided on the inner side of the switch panel 23. The interlocking shaft 22 moves laterally left and right inside the switch panel 23. The interlocking shaft 22 is used to cooperate with the cabinet door of the switch. When the interlocking shaft 22 moves to the right and extends, it locks the cabinet door. When the interlocking shaft 22 moves to the left and retracts, it unlocks the cabinet door, allowing the cabinet door to be opened.
[0057] like Figures 6 to 9As shown, a third slide groove 221 is provided on the interlocking shaft 22, the connecting pin 7 passes through the interlocking shaft 22 and the third slide groove 221 in a front-to-back direction, and the upper end of the interlocking lever 3 passes through the third slide groove 221;
[0058] Specifically, the flat body of the interlocking lever 3 moves within the third slide groove 221.
[0059] One end of the connecting pin 7 is connected to the interlocking plate 4, and the other end of the connecting pin 7 is connected to the interlocking shaft 22 after passing through the third slide groove 221. The position of the connecting pin 7 relative to the interlocking plate 4 is fixed, while the interlocking lever 3 moves relative to the interlocking shaft 22.
[0060] In actual operation, when the grounding main shaft 13 rotates counterclockwise to close the grounding circuit, the interlocking lever 3 drives the interlocking shaft 22 to move laterally to the left. At this time, the lock is unlocked and the cabinet door can be opened. At this time, the interlocking plate 4 drives the limit plate 5 to move upward. The limit plate 5 abuts against the bent plate 6, which restricts the closing half shaft 21 from rotating clockwise to close the circuit. The switch cannot be closed manually or electrically, thus realizing mechanical interlocking and preventing the switch from closing when grounding.
[0061] When the grounding main shaft 13 rotates clockwise to perform grounding tripping, the interlocking lever 3 drives the interlocking shaft 22 to move laterally to the right. At this time, the cabinet door is locked, and the operation is more complete for the operator. The closing half shaft 21 is also unlocked internally. Specifically, the grounding main shaft 13 drives the interlocking plate 4 to move downward through the interlocking lever 3, which drives the limit plate 5 to disengage from the bending plate 6, and the closing half shaft 21 can perform the closing operation.
[0062] In this implementation, the limiting plate 5 can be a plate or a screw, see [reference]. Figure 4 The limit plate 5 is made of sheet metal, see [link / reference]. Figure 5 The limiting plate 5 uses screws.
[0063] In this embodiment of the wind power switch, the operating main shaft 11, the isolation main shaft 12 and the grounding main shaft are all arranged in a front-to-back direction, the interlocking shaft 22 is arranged horizontally to the left and right, and the interlocking plate 4 is arranged at an angle to the top and bottom. The entire wind power switch is existing. For details, please refer to the existing patent CN118571694A - An intelligent vacuum circuit breaker.
[0064] The main improvement of this patent application is the addition of an interlocking mechanism between the closing half-shaft 21 and the grounding main shaft 13. The interlocking mechanism mainly includes an interlocking plate 4, a limiting plate 5, and a bending plate 6. The bending plate 6 is fixed on the closing half-shaft 21, and the limiting plate 5 is fixed on the interlocking plate 4. The interlocking plate 4 connects the closing half-shaft 21 and the grounding main shaft 13. When the grounding main shaft 13 rotates counterclockwise to the grounding closing position, the interlocking plate 4 and the limiting plate 5 abut against the bending plate 6 on the closing half-shaft 21, restricting the movement of the closing half-shaft 21. Conversely, when the grounding main shaft 13 rotates clockwise, it causes the interlocking plate 4 and the limiting plate 5 to disengage from the restriction on the closing half-shaft 21 and the bending plate 6, allowing it to close smoothly.
[0065] The interlocking device of this patent application, without changing the original switch layout, only adds a bending plate 6, an interlocking plate 4 and a limiting plate 5 between the closing half shaft 21 and the grounding main shaft 13. By using the original switch transmission logic, the mechanical interlocking function of the switch is improved and the safety hazards of switch operation are eliminated.
[0066] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0067] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0068] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0069] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.
[0070] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0071] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0072] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A closing interlocking device for a wind turbine switch, characterized in that, include Frame (1), on which an operating spindle (11), an isolation spindle (12), and a grounding spindle (13) are provided, the grounding spindle (13) and the isolation spindle (12) being connected by a connecting rod (14); and A circuit breaker operating mechanism (2) is disposed at the front end of the frame (1), the circuit breaker operating mechanism (2) comprising: A closing half-shaft (21) is provided with a bent plate (6). During the closing operation, the closing half-shaft (21) drives the bent plate (6) to rotate clockwise. Interlocking lever (3), the lower end of which is fixedly connected to the grounding main shaft (13), and the upper end of which is provided with a first sliding groove (31). The interlocking plate (32) has a second slide groove (41) at its upper end and is sleeved on the closing half shaft (21) through the second slide groove (41). A connecting pin (7) is provided at its lower end, and the connecting pin (7) passes through the first slide groove (31). Limiting plate (5), the limiting plate (5) is fixedly mounted on interlocking plate (32); When the grounding main shaft (13) rotates counterclockwise to perform grounding closing, the interlocking lever (3) drives the interlocking plate (32) and the limit plate (5) to move upward. The upper end of the limit plate (5) abuts against the bent plate (6), thereby restricting the closing half shaft (21) from performing closing rotation. When the grounding main shaft (13) rotates clockwise to perform grounding tripping, the interlocking plate (32) drives the limit plate (5) to disengage from the bending plate (6), and the closing half shaft (21) performs closing operation.
2. The closing interlocking device for a wind power switch according to claim 1, characterized in that, The circuit breaker operating mechanism (2) has a switch panel (23) at the front end. An interlocking shaft (22) for opening and closing the cabinet door is provided inside the switch panel (23). The interlocking shaft (22) moves laterally left and right inside the switch panel (23). A third slide groove (221) is provided on the interlocking shaft (22), the connecting pin (7) passes through the interlocking shaft (22) and the third slide groove (221) in the front and back direction, and the upper end of the interlocking lever (3) passes through the third slide groove (221); When the grounding main shaft (13) rotates counterclockwise to close the grounding circuit, the interlocking lever (3) drives the interlocking shaft (22) to move laterally to the left, at which time the cabinet door is unlocked; When the grounding main shaft (13) rotates clockwise to perform grounding disconnection, the interlocking lever (3) drives the interlocking shaft (22) to move laterally to the right, at which time the cabinet door is locked.
3. The closing interlocking device for a wind power switch according to claim 1, characterized in that, A pair of spacers (61) are provided on the closing half shaft (21), and the upper end of the interlocking plate (32) is located between the two spacers (61).
4. The closing interlocking device for a wind power switch according to claim 1, characterized in that, The bent plate (6) is an L-shaped plate.
5. The closing interlocking device for a wind power switch according to claim 1, characterized in that, The limiting plate (5) is replaced with screws.