Ring main unit system with bus coupler cabinets capable of being interlocked in cross mode
By setting up a locking structure and closing device in the ring main unit system, cross-interlocking between the two bus tie cabinets was achieved, solving the problem of frequent safety accidents and improving system safety.
Patent Information
- Application Number
- CN202423313472.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing technologies, the cross-interlock function between two bus tie cabinets cannot be achieved in a two-section bus system, leading to frequent safety accidents.
By introducing first and second incoming line cabinets and corresponding first and second bus tie cabinets into the ring main unit system, setting first and second locking structures, and installing closing devices at the load switch operating holes, cross-interlocking is achieved using limiters, displacement devices, and travel switches to ensure that only one bus tie cabinet is in the closed state at any given time.
The cross-interlock function between the two bus tie cabinets was implemented, which improved system security and prevented safety accidents.
Smart Images
Figure CN223797759U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of ring main units, and more specifically, to a ring main unit system with cross-interlocking bus tie cabinets. Background Technology
[0002] Ring main units come in two conventional types: incoming line cabinets and bus tie cabinets. Incoming line cabinets are cable incoming line units, with each incoming line corresponding to a section of busbar; bus tie cabinets are connection units between two sections of busbar, and the connection is made at the lower end.
[0003] In existing technology, a two-section busbar system includes two incoming line cabinets and two bus tie cabinets (one less). Personnel operate the load switch's operating shaft located at the load switch operating port of each ring main unit to perform the closing and opening operations of the load switch. However, there is no way to guarantee that only one of the two bus tie cabinets in the two-section busbar system is in the closed state, meaning the cross-interlocking function between the two bus tie cabinets cannot be achieved; this leads to a higher risk of safety accidents.
[0004] There is currently no effective solution to the safety issues that arise from the inability of relevant technologies to achieve cross-interlocking between two bus tie cabinets in a two-section busbar system. Summary of the Invention
[0005] The main purpose of this application is to provide a ring main unit system with cross-interlocking bus tie cabinets to solve the problem of potential safety accidents caused by the inability to achieve cross-interlocking between two bus tie cabinets in a two-section bus system.
[0006] To achieve the above objectives, according to one aspect of this application, a ring main unit system with cross-interlocking busbar cabinets is provided.
[0007] The cross-interlocking ring main unit system according to this application includes: a first incoming line cabinet, a second incoming line cabinet, and corresponding first bus tie cabinets and second bus tie cabinets connected together by a top busbar. The cabinets of the first incoming line cabinet, the second incoming line cabinet, and the first bus tie cabinet are provided with a first locking structure. A first closing device is provided at the load switch operating hole on the right side of the first locking structure. When the first closing device is in the closed state, the first locking structure locks the first key inserted therein. When the first closing device is in the open state, the first locking structure unlocks the first key inserted therein.
[0008] Furthermore, the first closing device includes: a limiting member, rotatably disposed at the operating hole of the load switch and located on the right side of the first locking structure; a displacement member, rotatably disposed in the incoming line cabinet or bus tie cabinet, with one end abutting against the locking tongue of the first locking structure; and a limit switch, disposed in the incoming line cabinet or bus tie cabinet, connected to the other end of the displacement member, with its long closed contact connected in series in the electrical closing circuit.
[0009] Furthermore, the limiting element is a cam.
[0010] The displacement component includes a rotating shaft and a connecting member. The rotating shaft is located below the operating hole of the load switch, and the connecting member is rotatably connected to the rotating shaft. One end of the connecting member abuts against the locking tongue of the first lock structure, and the other end is connected to the limit switch.
[0011] The connecting component is a Y-shaped sheet metal part.
[0012] Furthermore, the rotating shaft is located below the operating hole of the load switch, and the Y-shaped sheet metal is rotatably connected to the rotating shaft, with one end abutting against the locking tongue of the first lock structure and the other end connected to the limit switch.
[0013] Furthermore, the first closing device also includes: a first main shaft, a first stop block, and a first electromagnet, wherein the first main shaft is disposed in the load switch operating hole and a limiting member is sleeved on it; the first stop block is slidably disposed in the cabinet and located below the first main shaft, and the first electromagnet is disposed in the cabinet and located to the left of the first stop block.
[0014] Furthermore, the first bus tie cabinet and the second bus tie cabinet are provided with a second locking structure. The grounding switch operating hole on the right side of the second locking structure of the first bus tie cabinet is provided with a second closing device. The grounding switch operating hole on the right side of the second locking structure of the second bus tie cabinet is provided with the first closing device. The grounding switch operating hole on the right side of the first locking structure of the second bus tie cabinet is provided with a second closing device.
[0015] Furthermore, the second closing device includes: a second main shaft and a linkage sheet metal, wherein the main shaft is disposed in the grounding switch operating hole, and the linkage sheet metal is sleeved on the main shaft.
[0016] Furthermore, the second closing device includes: a second stop block and a second electromagnet, wherein the second stop block is slidably disposed in the cabinet and located to the left of the second main shaft, and the second electromagnet is disposed in the cabinet and located to the left of the second stop block.
[0017] Furthermore, the second lock structure includes: a lock body and an extended bolt, the lock body having a keyhole into which a second key can be inserted, the extended bolt being located in the extension direction of the bolt of the lock body and on the left side of the second stop.
[0018] In this embodiment, an improved closing structure is adopted. A first incoming line cabinet, a second incoming line cabinet, and corresponding first and second bus tie cabinets are connected together via a top busbar. Each of these cabinets has a first locking structure, and a first closing device is located at the load switch operating hole on the right side of the first locking structure. The first and second bus tie cabinets also have second locking structures. A second closing device is located at the grounding switch operating hole on the right side of the second locking structure of the first bus tie cabinet; the first closing device is located at the grounding switch operating hole on the right side of the second locking structure of the second bus tie cabinet; and a second closing device is located at the grounding switch operating hole on the right side of the first locking structure of the second bus tie cabinet. This achieves the cross-interlocking function between the two bus tie cabinets, thereby improving safety and solving the technical problem of potential safety accidents caused by the inability to achieve cross-interlocking between the two bus tie cabinets in a two-section busbar system. Attached Figure Description
[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:
[0020] Figure 1 This is one of the assembly diagrams according to an embodiment of this application;
[0021] Figure 2 This is a second assembly diagram according to an embodiment of this application;
[0022] Figure 3 This is a structural schematic diagram according to an embodiment of this application.
[0023] Figure Labels
[0024] 100. First closing device; 200. Second closing device; 1. First incoming line cabinet; 2. Second incoming line cabinet; 3. First bus tie cabinet; 4. Second bus tie cabinet; 5. First locking structure; 6. Load switch operating hole; 7. Limiting element; 8. Displacement element; 9. Limit switch; 12. Rotating shaft; 13. Y-type sheet metal; 14. First main shaft; 15. First stop block; 16. First electromagnet; 17. Second locking structure; 18. Second main shaft; 19. Linkage sheet metal; 20. Second stop block; 21. Second electromagnet; 22. Lock body; 23. Extended locking tongue; 24. Grounding switch operating hole. Detailed Implementation
[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0027] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0028] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0031] like Figure 1-3 As shown, this application relates to a ring main unit system with cross-interlocking bus tie cabinets. The system includes: a first incoming line cabinet 1, a second incoming line cabinet 2, and corresponding first bus tie cabinets 3 and 4 connected together by a top busbar. The cabinets of the first incoming line cabinet 1, the second incoming line cabinet 2, and the first bus tie cabinet 3 are provided with a first locking structure 5. A first closing device 100 is provided at the load switch operation hole 6 on the right side of the first locking structure 5. When the first closing device 100 is in the closed state, the first locking structure 5 locks the first key inserted therein. When the first closing device 100 is in the open state, the first locking structure 5 unlocks the first key inserted therein.
[0032] Specifically, the four ring main units are connected via a top busbar and are designated as the first incoming line unit 1, the first bus tie unit 3, the second bus tie unit 4, and the second incoming line unit 2. Each unit has 6 load switch operating holes and 24 grounding switch operating holes. All switches are three-positioned, with positions for load switch closing, load switch and grounding switch opening, and grounding switch closing. The first lock structure 5 consists of a lock body 22 and a lock tongue. The lock body 22 has four mounting holes and can be fixed to a bracket in the ring main unit. After being rotated by the first key, the lock tongue will extend and retract. The first closing device 100 is used to close or open the load switch; preferably, the first closing device 100 includes: a limiting member 7, rotatably disposed at the load switch operating hole 6 and located on the right side of the first locking structure 5; a displacement member 8, rotatably disposed in the incoming line cabinet or bus tie cabinet, with one end abutting against the locking tongue of the first locking structure 5; and a limit switch 9, disposed in the incoming line cabinet or bus tie cabinet, connected to the other end of the displacement member 8, and its long closed contact is connected in series in the electrical closing circuit; further, the limiting member 7 is a cam; further, the displacement member 8 includes: a rotating shaft 12 and a Y-shaped sheet metal 13, wherein the rotating shaft 12 is disposed below the load switch operating hole 6, and the Y-shaped sheet metal 13 is rotatably connected to the rotating shaft 12, with one end abutting against the locking tongue of the first locking structure 5, and the other end connected to the limit switch 9.
[0033] The operating principle is as follows: After the load switch is closed, the cam will rotate with the load switch operating shaft (first main shaft 14). At this time, the cam will restrict the lock tongue of the lock body 22 from moving to the right. If the program lock key needs to be removed, the key needs to be rotated, and the lock tongue will move accordingly. If the lock tongue cannot move, the key cannot be removed. Conversely, if the load switch is in the open state, the lock tongue can move normally to the right when the key is rotated, and the key can be removed normally. At the same time, after the lock tongue moves to the right, it will press against the Y-shaped sheet metal 13. The Y-shaped sheet metal 13 rotates on the rotating shaft 12, which will then change the position of the limit switch 9. The long closed contact of the limit switch 9 is connected in series in the electrical closing circuit, so the load switch can be locked for electric operation at this time. At the same time, after the lock tongue extends to the right, it will block the load switch operating hole 6 shaft, and the load switch will not be able to be mechanically operated.
[0034] In summary, when the device is in the locked state, the key cannot be removed, and the load switch can be operated mechanically and electrically. When the device is in the unlocked state, the key can be removed, but the load switch cannot be operated mechanically or electrically.
[0035] Each of the first incoming line cabinet 1, the first bus tie cabinet 3, and the second incoming line cabinet 2 is equipped with a first closing device 100 at the load switch operating hole 6. The lock cylinder of the first lock structure 5 is numbered KF1 and is equipped with only 2 first keys. Since the first key cannot be removed after closing, it ensures that at most two of the bus tie cabinets and two incoming line cabinets in the two busbar systems are in the closed state, while the rest are in the open state. Therefore, the three-in-two function of the ring network cabinet is realized, effectively avoiding safety accidents.
[0036] Preferably, the first closing device 100 further includes: a first main shaft 14, a first stop 15, and a first electromagnet 16. The first main shaft 14 is disposed in the load switch operating hole 6, and a limiting member 7 is sleeved on it. The first stop 15 is slidably disposed in the cabinet and located below the first main shaft 14. The first electromagnet 16 is disposed in the cabinet and located to the left of the first stop 15. Taking the first bus tie cabinet 3 as an example, the closing interlocking electromagnet circuit is connected in series with the open position contact of the grounding switch of the second bus tie cabinet 4. When the grounding switch of the second bus tie cabinet 4 is in the closed position, the closing interlocking first electromagnet 16 is released, and the first stop 15 is blocked from moving to the left by the locking tongue of the first electromagnet 16, thus preventing the load switch from performing a mechanical closing operation. Furthermore, the opening position contact of the grounding switch of the second bus tie cabinet 4 is connected in series in the closing circuit of the first bus tie cabinet 3 to achieve the interlocking of the electrical closing operation. The logic principle of the second bus tie cabinet 4 is the same, and will not be elaborated further here.
[0037] Preferably, the first bus tie cabinet 3 and the second bus tie cabinet 4 are provided with a second locking structure 17, and a second closing device 200 is provided at the grounding switch operation hole 24 on the right side of the second locking structure 17 of the first bus tie cabinet 3; the first closing device 100 is provided at the grounding switch operation hole 24 on the right side of the second locking structure 17 of the second bus tie cabinet 4, and the second closing device 200 is provided at the grounding switch operation hole 24 on the right side of the first locking structure 5 of the second bus tie cabinet 4. Further, the second closing device 200 includes: a second main shaft 18 and a linkage sheet metal 19, the main shaft is disposed in the grounding switch operation hole 24, and the linkage sheet metal 19 is sleeved on the main shaft. Further still, the second closing device 200 includes: a second stop 20 and a second electromagnet 21, wherein the second stop 20 is slidably disposed in the cabinet and located to the left of the second main shaft 18, and the second electromagnet 21 is disposed in the cabinet and located to the left of the second stop 20. Taking the first bus tie cabinet 3 as an example, the grounding interlocking electromagnet circuit is connected in series with the open position contact of the load switch in the second bus tie cabinet 4. When the load switch in the second bus tie cabinet 4 is in the closed position, the grounding interlocking second electromagnet 21 is released, and the second stop 20 is blocked by the locking tongue of the second electromagnet 21 and cannot move to the left, so the grounding switch cannot perform a mechanical closing operation. The second bus tie cabinet 4 is the opposite, connected in series with the contact of the first bus tie cabinet 3, and the logic is similar to that of the first bus tie cabinet 3.
[0038] Preferably, the second lock structure 17 includes a lock body 22 and an extended bolt 23. The lock body 22 has a keyhole into which a second key can be inserted. The extended bolt 23 is located in the extension direction of the bolt of the lock body 22 and is situated to the left of the second stop. When the grounding switch is in the open state, if the key is to be removed, it needs to unlock the bolt and the extended bolt 23 to move to the right. After moving to the right, the second stop 20 is blocked by the extended bolt 23 and cannot operate. When the grounding switch is in the closed state, the key cannot unlock the bolt and the extended bolt 23 cannot move to the right.
[0039] In summary, by extending the operating port 6 of the load switch in the first bus tie cabinet 3 and installing a KF2 program lock on the grounding switch operating port 24, and by extending the operating port 6 of the load switch in the second bus tie cabinet 4 and installing a KF1 program lock on the grounding switch operating port 24, and equipping only one KF2 key, if the KF2 key cannot be removed after the grounding switch in the first bus tie cabinet 3 is closed, the load switch in the second bus tie cabinet 4 cannot be closed; conversely, if the KF1 key cannot be removed after the grounding switch in the second bus tie cabinet 4 is closed, the load switch in the first bus tie cabinet 3 cannot be closed. This achieves the cross-interlocking logic of the bus tie cabinets.
[0040] Furthermore, the entire device is equipped with two KF1 keys and one KF2 key. If the two KF1 keys are used to unlock the load switch of bus tie cabinet 1 and the grounding switch of bus tie cabinet 2, a conflict will occur. However, at this time, neither of the two incoming load switches can be closed, that is, there is no bus voltage, and the five-prevention risks do not exist.
[0041] As can be seen from the above description, this application achieves the following technical effects:
[0042] In this embodiment, an improved closing structure is adopted. A first incoming line cabinet 1, a second incoming line cabinet 2, and corresponding first bus tie cabinets 3 and 4 are connected together via top busbars. The cabinets of the first incoming line cabinet 1, second incoming line cabinet 2, and first bus tie cabinet 3 are equipped with a first locking structure 5. A first closing device 100 is located at the load switch operating hole 6 on the right side of the first locking structure 5. The first bus tie cabinet 3 and second bus tie cabinet 4 are also equipped with a second locking structure 17. A second closing device 200 is located at the grounding switch operating hole 24 on the right side of the second locking structure 17 of the first bus tie cabinet 3. The first closing device 100 is located at the grounding switch operating hole 24 on the right side of the second locking structure 17 of the second bus tie cabinet 4, and the second closing device 200 is located at the grounding switch operating hole 24 on the right side of the first locking structure 5 of the second bus tie cabinet 4. This achieves the purpose of cross-interlocking between the two bus tie cabinets, thereby improving safety and solving the technical problem of potential safety accidents caused by the inability to achieve cross-interlocking between the two bus tie cabinets in a two-section busbar system.
[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A ring main unit system with cross-interlocking busbars, characterized in that, include: The first incoming line cabinet, the second incoming line cabinet, and the corresponding first bus tie cabinet and second bus tie cabinet are connected together by the top bus. The cabinet of the first incoming line cabinet, the second incoming line cabinet, and the first bus tie cabinet is provided with a first locking structure. The first closing device is provided at the load switch operation hole on the right side of the first locking structure. The first bus tie cabinet and the second bus tie cabinet are also provided with a second locking structure. The second locking structure of the first bus tie cabinet is provided with a second closing device at the grounding switch operating hole on the right side; the second locking structure of the second bus tie cabinet is provided with the first closing device at the grounding switch operating hole on the right side; and the first locking structure of the second bus tie cabinet is provided with a second closing device at the grounding switch operating hole on the right side.
2. The ring main unit system with cross-interlocking busbars according to claim 1, characterized in that, The first closing device includes: a limiting member, rotatably disposed at the operating hole of the load switch and located on the right side of the first locking structure; a displacement member, rotatably disposed in the incoming line cabinet or bus tie cabinet, with one end abutting against the locking tongue of the first locking structure; and a limit switch, disposed in the incoming line cabinet or bus tie cabinet, connected to the other end of the displacement member, with its long closed contact connected in series in the electrical closing circuit.
3. The ring main unit system with cross-interlocking busbars according to claim 2, characterized in that, The limiting component is a cam.
4. The ring main unit system with cross-interlocking busbars according to claim 2, characterized in that, The displacement component includes a rotating shaft and a connecting member. The rotating shaft is located below the operating hole of the load switch, and the connecting member is rotatably connected to the rotating shaft. One end of the connecting member abuts against the locking tongue of the first lock structure, and the other end is connected to the limit switch.
5. The ring main unit system with cross-interlocking busbars according to claim 4, characterized in that, The connecting component is a Y-shaped sheet metal part.
6. The ring main unit system with cross-interlocking busbars according to claim 2, characterized in that, The first closing device further includes a first main shaft and a first stop block, wherein the first main shaft is disposed in the load switch operating hole and a limiting member is sleeved on it, and the first stop block is slidably disposed in the cabinet and located below the first main shaft.
7. The ring main unit system with cross-interlocking busbars according to claim 6, characterized in that, The first closing device further includes a first electromagnet, which is located in the cabinet and to the left of the first stop.
8. The ring main unit system with cross-interlocking busbars according to claim 1, characterized in that, The second closing device includes: a second main shaft and a linkage sheet metal, wherein the main shaft is disposed in the grounding switch operating hole, and the linkage sheet metal is sleeved on the main shaft.
9. The ring main unit system with cross-interlocking busbars according to claim 8, characterized in that, The second closing device includes a second stop block and a second electromagnet, wherein the second stop block is slidably disposed in the cabinet and located to the left of the second main shaft, and the second electromagnet is disposed in the cabinet and located to the left of the second stop block.
10. The ring main unit system with cross-interlocking busbars according to claim 1, characterized in that, The second lock structure includes a lock body and an extended bolt. The lock body has a keyhole into which a second key can be inserted. The extended bolt is located in the extension direction of the bolt of the lock body and is situated to the left of the second stop.