Interlocking structure for lower door of isolating switch
By designing a grounding spring cover and a locking structure with a locking electromagnet in the ring main unit, the problems of complex operation, high cost and insufficient flexibility are solved, and the safety and flexibility are improved.
Patent Information
- Application Number
- CN202423238193.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The existing interlocking locking structure of the lower door of the disconnecting switch in the ring main unit is complex to operate, costly, and lacks flexibility, making it difficult to meet the special needs of different types of ring main units.
Design a locking structure including a grounding spring cover, a grounding operating shaft, an interlocking bracket, and a locking electromagnet. The locking electromagnet locks the grounding operating shaft when it is not energized and unlocks it when it is energized to prevent accidental operation.
Simplify operating procedures, improve safety, reduce safety hazards, lower costs, and adapt to the needs of different types of ring main units.
Smart Images
Figure CN223582877U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a disconnecting switch lower door interlocking locking structure and belongs to the field of ring main units. BACKGROUND
[0002] The ring main unit is a kind of distribution equipment used in power system, mainly used for the power distribution of urban power grid, rural power grid and industrial and mining enterprises. The ring main unit is compact in structure, small in floor area, and has the advantages of convenient operation, safety and the like. The disconnecting switch is one of the important elements in the ring main unit, and its main function is to isolate the circuit to ensure the safety during equipment maintenance or fault handling.
[0003] In order to prevent the security risks caused by misoperation or illegal operation, the ring main unit usually needs to be designed with a lower door interlocking locking structure to ensure the linkage and safety protection in the following scenarios.
[0004] The disconnecting switch lower door interlocking locking structure of the ring main unit on the market mainly has the following problems:
[0005] 1. Complex operation: the structure of part of the interlocking mechanism is complex, and the operation is not convenient enough, which affects the daily maintenance efficiency. 2. High cost: part of the locking structure relies on a complex electromagnetic interlocking device, which increases the manufacturing cost and maintenance cost. 3. Poor flexibility: the existing design is mostly a fixed scheme, which is difficult to adapt to the special needs of different types of ring main units. UTILITY MODEL CONTENTS
[0006] The utility model aims at overcoming the shortcomings and deficiencies in the prior art, and provides a disconnecting switch lower door interlocking locking structure.
[0007] The application discloses a disconnecting switch lower door interlocking locking structure, which comprises a grounding spring cover, wherein a grounding operation shaft for driving grounding on-off of the disconnecting switch is arranged on the grounding spring cover, an interlocking support is arranged on the grounding spring cover, a reinforcing plate is arranged on the interlocking support, the grounding operation shaft extends out of the reinforcing plate, a locking electromagnet is arranged on the reinforcing plate, and the locking electromagnet is locked with the grounding operation shaft in a non-live state so that a handle cannot be inserted, and the locking electromagnet is unlocked with the grounding operation shaft in a live state so that the handle can be inserted.
[0008] Preferably, the grounding operation shaft comprises a cylindrical first limiting part arranged at the end, the first limiting part is connected with a conical second limiting part, the locking electromagnet comprises a limiting shaft, and the limiting shaft extends to the first limiting part in the non-live state. By designing the cylindrical first limiting part and the conical second limiting part at the end of the grounding operation shaft and combining the extension of the limiting shaft of the locking electromagnet in the non-live state, more accurate locking of the grounding operation shaft can be realized, the misoperation can be effectively avoided, and the safety and stability are improved.
[0009] Further, the shaft diameter of the first limiting part is smaller than the shaft diameter of the grounding operation shaft. The difference between the smaller shaft diameter of the first limiting part and the larger shaft diameter of the grounding operation shaft enables the locking electromagnet and the grounding operation shaft to be more accurately matched when being locked.
[0010] Further, the conical surface of the second limiting part is connected with the first limiting part in abutment. The conical surface of the second limiting part is connected with the first limiting part in abutment, so that the grounding operation shaft can be accurately guided to the correct position in the locking or unlocking process.
[0011] Preferably, the locking electromagnet comprises a shell fixed on the reinforcing plate, the shell is internally provided with a coil, an iron core, an armature and a spring, and is used for realizing the locking or unlocking state of the locking electromagnet by controlling the on-off of the current.
[0012] Preferably, the locking electromagnet is arranged above the grounding operating shaft. Arranging the locking electromagnet above the grounding operating shaft can effectively save the overall space of the device, avoiding complex layout and excessive land occupation. This layout can make the structure of the device more compact, and is suitable for working environment with limited space. At the same time, the distribution of the electromagnet and the grounding operating shaft does not interfere with the work of other mechanical parts, ensuring the coordination and efficient operation between the parts.
[0013] The beneficial effects of the utility model are as follows: the locking electromagnet is locked with the grounding operating shaft in the uncharged state, so that the handle cannot be inserted, which effectively prevents the operator from misoperation when the device is charged. Only when the device is in a safe charged state, the locking electromagnet releases the lock with the grounding operating shaft, so that the handle can be inserted and operated. This design can effectively avoid electrical failure or safety accidents caused by misoperation, and improve the safety of the system. In the charged state, the locking electromagnet automatically releases the lock with the grounding operating shaft, so that the operator can conveniently insert the handle for operation without an additional manual unlocking process. This not only simplifies the operation process, but also reduces the safety hazards that may be caused by improper human operation. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.
[0015] Figure 1 It is the main structure diagram of the utility model;
[0016] Figure 2 It is Figure 1 The enlarged view of the detail in A of the figure;
[0017] In the figure, 1, grounding spring cover;2, grounding operating shaft;21, first limiting part;22, second limiting part;3, interlocking support;31, reinforcing plate;4, locking electromagnet;41, limiting shaft;42, shell. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will further describe the utility model in combination with the drawings.
[0019] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.
[0020] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.
[0021] like Figures 1-2 The diagram illustrates an embodiment of the interlocking locking structure for the lower door of a disconnecting switch according to this invention. It includes a grounding spring cover 1, on which a grounding operating shaft 2 for driving the grounding opening and closing of the disconnecting switch is mounted. The grounding spring cover 1 also has an interlocking bracket 3, and the interlocking bracket 3 has a reinforcing plate 31. The reinforcing plate 31 extends from the end of the grounding operating shaft 2, and a locking electromagnet 4 is mounted on the reinforcing plate 31. In a de-energized state, the locking electromagnet 4 is locked to the grounding operating shaft 2, preventing the handle from being inserted. In an energized state, the locking electromagnet 4 releases its lock to the grounding operating shaft 2, allowing the handle to be inserted. The locking electromagnet 4's lock to the grounding operating shaft 2 in a de-energized state effectively prevents operator misoperation when the equipment is energized. Only when the equipment is in a safe energized state does the locking electromagnet 4 release its lock to the grounding operating shaft 2, allowing the handle to be inserted for operation. This design effectively avoids electrical faults or safety accidents caused by misoperation, improving system safety. When energized, the locking electromagnet 4 automatically releases its lock from the grounded operating shaft 2, allowing the operator to easily insert the handle for operation without requiring an additional manual unlocking process. This not only simplifies the operation process but also reduces potential safety hazards caused by improper human operation.
[0022] The grounding operating shaft 2 includes a cylindrical first limiting part 21 at its end, and a frustoconical second limiting part 22 connected to the first limiting part 21. The locking electromagnet 4 includes a limiting shaft 41, which extends to the first limiting part 21 in the non-energized state. By designing the cylindrical first limiting part 21 and the frustoconical second limiting part 22 at the end of the grounding operating shaft 2, combined with the extension effect of the limiting shaft 41 of the locking electromagnet 4 in the non-energized state, more precise locking of the grounding operating shaft 2 can be achieved, effectively avoiding misoperation and improving safety and stability.
[0023] The shaft diameter of the first limiting part 21 is smaller than the shaft diameter of the grounding operation shaft 2. The difference between the smaller shaft diameter of the first limiting part 21 and the larger shaft diameter of the grounding operation shaft 2 enables the latching electromagnet 4 and the grounding operation shaft 2 to achieve more precise cooperation when locked.
[0024] The tapered surface of the second limiting part 22 is connected to the first limiting part 21. The tapered surface of the second limiting part 22 is connected to the first limiting part 21, so that the grounding operation shaft 2 can be accurately guided to the correct position by the tapered surface during locking or unlocking.
[0025] The latching electromagnet 4 includes a shell 42 fixed to the reinforcing plate 31, and the shell 42 is provided with a coil, a core, an armature and a spring inside, for realizing the latching electromagnet 4 to keep the locked or unlocked state by controlling the on-off of the current.
[0026] The latching electromagnet 4 is arranged above the grounding operation shaft 2. Arranging the latching electromagnet 4 above the grounding operation shaft 2 can effectively save the overall space of the equipment, avoiding complex layout and excessive occupation. This layout can make the structure of the equipment more compact, and is suitable for working environment with limited space. At the same time, the distribution of the electromagnet and the grounding operation shaft 2 does not interfere with the work of other mechanical parts, ensuring the coordination and efficient operation between parts.
[0027] The above only discloses the preferred embodiments of the utility model, of course, cannot limit the scope of the utility model right of the utility model, therefore, the equivalent change made according to the utility model claim still belongs to the range covered by the utility model.
[0028] Although the utility model has been described with reference to a number of specific embodiments, it should be understood that the utility model is not limited to the disclosed specific embodiments. The utility model is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims
1. An isolating switch lower door interlocking locking structure, characterized in that: The ground spring cover is provided with a ground operating shaft for driving the ground switch to open and close, and is provided with an interlocking support, and the interlocking support is provided with a reinforcing plate, and the end of the ground operating shaft extends out of the reinforcing plate, and the reinforcing plate is provided with a locking electromagnet, and the locking electromagnet is locked with the ground operating shaft in the non-conductive state so that the handle cannot be inserted, and the locking electromagnet is unlocked with the ground operating shaft in the conductive state so that the handle can be inserted.
2. The isolating switch lower door interlocking and locking structure according to claim 1, characterized in that: The ground operating shaft comprises a cylindrical first limiting part at the end, and the first limiting part is connected with a conical second limiting part, and the locking electromagnet comprises a limiting shaft, and the limiting shaft extends to the first limiting part in the non-conductive state.
3. The isolating switch lower door interlock locking structure according to claim 2, characterized in that: The shaft diameter of the first limiting part is smaller than the shaft diameter of the ground operating shaft.
4. The isolating switch lower door interlock locking structure as claimed in claim 2, wherein: The conical surface of the second limiting part is connected with the first limiting part in abutment.
5. The isolating switch lower door interlock locking structure as claimed in claim 1, wherein: The locking electromagnet comprises a shell fixed on the reinforcing plate, and the shell is provided with a coil, an iron core, an armature and a spring, and the locking electromagnet is kept in the locked or unlocked state by controlling the on-off of the current.
6. The isolating switch lower door interlock locking structure as claimed in claim 1, wherein: The locking electromagnet is arranged above the ground operating shaft.