Isolation circuit breaker and handcart interlocking structure thereof
By designing a handcart interlocking structure and utilizing the linkage plate and linkage mechanism, the handcart locking rod can be automatically locked or unlocked according to the circuit breaker status, which solves the problem of misoperation of the isolation circuit breaker and improves operational safety.
Patent Information
- Application Number
- CN202520006656.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing isolating circuit breakers pose a risk of operator misoperation of the handcart, as they cannot accurately identify the working position, which could lead to the handcart being accidentally pulled out.
A handcart interlocking structure was designed, which is linked to the working state switching device of the isolating circuit breaker through the linkage plate. The movement is transmitted by the linkage mechanism, so that the limit rod is locked or unlocked according to the position of the circuit breaker, preventing the handcart from being pulled out when it is in the working position.
This improves operational safety, prevents misoperation, and ensures that the trolley cannot be pulled out when the isolating circuit breaker is in the working position, thus avoiding potential dangers.
Smart Images
Figure CN223927972U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-voltage switchgear technology, and more specifically, to an isolating circuit breaker and its handcart interlocking structure. Background Technology
[0002] The longitudinal rotating isolating circuit breaker integrates a high-voltage vacuum circuit breaker and a high-voltage disconnecting switch. The circuit-breaking operating mechanism drives the moving contacts of the vacuum interrupter within the three-phase poles to open and close the circuit. The isolation operating mechanism rotates the three-phase poles longitudinally to achieve the isolation function. The three-phase poles and the operating mechanism are mounted together on a trolley frame to form a trolley, which is detachably installed in the high-voltage switchgear cabinet. Understandably, the trolley cannot be removed when the isolating circuit breaker is in the working position. To prevent accidental operation, the operating mechanism is equipped with a locking component that cooperates with the cabinet, allowing the operating mechanism to be relative to the cabinet. This locking component includes a locking rod, an unlocking pull ring, and a return spring. The locking rod is horizontally positioned within the operating mechanism housing and can extend and retract relative to the housing. The unlocking pull ring allows the operator to grip and apply pulling force to the locking rod, pulling it back into the housing. The return spring gives the locking rod a tendency to extend towards the housing, and returns it to its original position after the pulling force on the locking rod disappears. However, there is a risk that operators may not be able to distinguish the working position of the isolating circuit breaker and may release the lock of the handcart by pulling the handcart ring. Utility Model Content
[0003] The purpose of this utility model is to provide a handcart interlocking structure that improves operational safety and prevents misoperation, as well as an isolation circuit breaker that uses this handcart interlocking structure.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] This utility model provides a handcart interlocking structure for use between the working state switching device of an isolating circuit breaker and the handcart locking rod, which locks or unlocks the handcart locking rod according to the working state of the isolating circuit breaker. The handcart interlocking structure includes a linkage assembly, a linkage plate, and a limiting rod; the linkage plate is configured to slide horizontally, is connected to the linkage assembly, and is used to connect to the working state switching device; the limiting rod extends vertically, is connected to the linkage assembly, and can rise or fall with the horizontal reciprocating sliding of the linkage plate, thereby inserting into or pulling out of a preset limiting notch on the handcart locking rod.
[0006] In one embodiment, the linkage assembly includes a linkage seat, a linkage shaft, a first linkage, and a second linkage. The linkage seat is used to install into the operating mechanism of the isolating circuit breaker. The linkage shaft is rotatably disposed on the linkage seat. The first linkage and the second linkage are respectively connected to the two ends of the linkage shaft. The linkage plate is connected to one end of the first linkage, and the limiting rod is connected to one end of the second linkage.
[0007] In one embodiment, the connecting rod seat includes a seat plate, a fixed plate formed by bending one end of the seat plate along its length, and a pair of side plates formed by bending both sides of the seat plate. The side plates have connecting rod shaft holes, and the connecting rod shaft passes through the connecting rod shaft holes. The first connecting rod and the second connecting rod are respectively installed on the ends of the connecting rod shaft that extend out of the connecting rod seat.
[0008] In one embodiment, the end of the connecting rod seat away from the fixed plate extends in a direction away from the first connecting rod to form a limiting plate, and a limiting hole is provided on the limiting plate, through which the limiting rod passes.
[0009] In one embodiment, the linkage plate has a connecting hole for threading a bolt to connect with the first connecting rod.
[0010] In one embodiment, the connection hole extends in a vertical direction.
[0011] In one embodiment, the handcart interlocking structure further includes a guide plate with a guide hole, the upper end of the limiting rod being connected to the second connecting rod, and the lower end of the limiting rod passing through the guide hole.
[0012] In one embodiment, one end of the guide plate is arranged horizontally with the guide hole thereon, and the other end of the guide plate is bent downward to form a vertical structure, and is fitted onto the locking rod during assembly.
[0013] In one embodiment, the end of the limiting rod that is inserted into the limiting notch has a clearance notch.
[0014] As a second aspect, the present invention also provides an isolating circuit breaker, including a handcart and the aforementioned handcart interlocking structure. The handcart includes an operating mechanism, and a locking rod is horizontally provided in the operating mechanism. A limit notch is provided on the locking rod, and the limit rod is pluggably inserted into the limit notch.
[0015] The beneficial effects of the technical solution provided by this utility model are as follows: The handcart interlocking structure of this utility model, by setting the linkage plate to be linked with the working state switching device of the isolating circuit breaker, the linkage mechanism transmits the movement of the linkage plate to the limit rod, so that the limit rod can lock or unlock the locking rod according to the working position of the isolating circuit breaker, preventing the handcart from being pulled out when the isolating circuit breaker is in the working position, avoiding misoperation, and improving operational safety. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.
[0017] Figure 1This is a schematic diagram of a handcart linkage structure provided in one embodiment of the present utility model, showing the state in which the limiting rod is pulled out of the limiting notch;
[0018] Figure 2 for Figure 1 The schematic diagram of the handcart linkage structure shown illustrates the state in which the limit rod is inserted into the limit structure.
[0019] Figure 3 A schematic diagram of the handcart linkage structure provided in one embodiment of this utility model.
[0020] Figure 4 This is a schematic diagram of the structure of a linkage plate provided in one embodiment of the present utility model;
[0021] Figure 5 This is a schematic diagram of the operating mechanism provided in one embodiment of the present utility model, showing the state in which the limiting rod is pulled out of the limiting notch;
[0022] Figure 6 for Figure 5 The schematic diagram of the operating mechanism shown illustrates the state in which the limit rod is inserted into the limit notch. Detailed Implementation
[0023] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.
[0024] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.
[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.
[0026] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0027] See Figures 1 to 6 This utility model relates to a handcart interlocking structure 100, used to associate the existing locking components of the handcart of the isolating circuit breaker with the working state of the isolating circuit breaker, preventing the handcart from being pulled out when the isolating circuit breaker is in the working position, avoiding misoperation, and improving operational safety. In addition, an isolating circuit breaker using the above-mentioned handcart interlocking structure 100 is also provided.
[0028] Please combine Figure 5 and Figure 6 It should be understood that the isolating circuit breaker includes an operating mechanism 1000, which includes a housing, a working state switching device, and a locking rod 200 disposed inside the housing and retractable relative to the housing. The locking rod 200 has a limiting notch 210. The working state switching device is used to control the working state of the isolating circuit breaker, that is, to switch the isolating circuit breaker between the working position and the isolating position.
[0029] The handcart interlocking structure 100 includes a linkage assembly 10, a linkage plate 20, and a limiting rod 30. The linkage plate 20 is configured to slide horizontally, is connected to the linkage assembly 10, and is used to connect to the working state switching device. The limiting rod 30 extends vertically, is connected to the linkage assembly 10, and can rise or fall as the linkage plate 20 slides horizontally back and forth, thereby inserting into or pulling out of the limiting notch 210 on the handcart locking rod 200.
[0030] In one embodiment, the linkage assembly 10 includes a linkage seat 11, a linkage shaft 12, a first linkage 13, and a second linkage 14. The linkage seat 11 is used to install into the operating mechanism of the isolating circuit breaker. The linkage shaft 12 is rotatably disposed on the linkage seat 11. The first linkage 13 and the second linkage 14 are respectively connected to the two ends of the linkage shaft 12. The linkage plate 20 is connected to one end of the first linkage 13, and the limiting rod 30 is connected to one end of the second linkage 14.
[0031] In one embodiment, the connecting rod seat 11 includes a seat plate 111, a fixing plate 112 formed by bending one end of the seat plate 111 along its length, and a pair of side plates 113 formed by bending both sides of the seat plate 111. The side plates 113 are provided with connecting rod shaft holes 1130, and the connecting rod shaft 12 passes through the connecting rod shaft holes 1130. The first connecting rod 13 and the second connecting rod 14 are respectively installed on the ends of the connecting rod shaft 12 that pass through the connecting rod seat 11.
[0032] In one embodiment, the end of the connecting rod seat 11 away from the fixed plate 112 extends in a direction away from the first connecting rod 13 to form a limiting plate 114. A limiting hole 1140 is provided on the limiting plate 114, and the limiting rod 30 passes through the limiting hole 1140. The limiting plate 114 limits the direction of movement of the limiting rod 30, that is, it changes rotation into vertical movement, thereby causing the limiting rod 30 to rise and fall through the translation of the linkage plate 20.
[0033] In one embodiment, the linkage plate 20 has a connection hole 21 for threading a bolt to connect with the first connecting rod 13.
[0034] In one embodiment, the connecting hole 21 is an oblong hole extending in the vertical direction, which allows the bolt to be displaced in the vertical direction along the connecting hole 21, and also facilitates the assembly of the linkage plate 20 and the first connecting rod 13.
[0035] In one embodiment, the handcart interlocking structure 100 further includes a guide plate 40, the guide plate 40 having a guide hole, the upper end of the limiting rod 30 being connected to the second connecting rod 14, and the lower end of the limiting rod 30 passing through the guide hole.
[0036] In one embodiment, one end of the guide plate 40 is arranged horizontally with the guide hole thereon, and the other end of the guide plate 40 is bent downward to form a vertical structure, and is fitted onto the locking rod 200 during assembly.
[0037] By setting a guide plate 40 to guide the lower end of the limiting rod 30, the lower end of the limiting rod 30 is prevented from lateral displacement during movement and thus cannot be accurately inserted into the limiting notch 210, thereby improving the reliability of the handcart interlocking structure 100.
[0038] In one embodiment, the end of the limiting rod 30 that is inserted into the limiting notch 210 is provided with a clearance notch (not shown, the same below). The clearance notch is used to make way for other structures connected to the locking rod 200, such as the mounting head of the unlocking pull ring, so that the limiting rod 30 can be smoothly inserted into the limiting notch 210, thereby improving the reliability of the handcart interlocking structure 100.
[0039] The working principle of the handcart interlocking structure 100 of this utility model is as follows:
[0040] When the isolating circuit breaker switches from the working position to the isolating position, it pushes the linkage plate 20 to move horizontally from left to right. The linkage plate 20 drives the first connecting rod 13 to rotate clockwise around the connecting rod shaft 12. The connecting rod shaft 12 drives the second connecting rod 14 to rotate clockwise at the same time. The limit rod 30 connected to the second connecting rod 14 moves upward. When the operation reaches the isolating position, the limit rod 30 moves upward to its highest point, opening the movement channel of the locking rod 200. The locking rod 200 can then retract inward, and the trolley can be moved out of the cabinet. Conversely, when the isolating circuit breaker switches from the isolating position to the working position, the limit rod 30 moves downward as the isolating operation progresses. In the working position, it reaches its lowest point, and the lower end of the limit rod 30 inserts into the limiting notch 210 of the locking rod 200. At this time, the locking rod 200 is blocked by the limit rod 30 and cannot retract, and the trolley cannot be moved out of the frame. Thus, the trolley can only be moved out in the isolating position, preventing the trolley from being moved out while energized and improving operational safety.
[0041] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of this utility model that have similar functions.
[0042] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.
Claims
1. A handcart interlocking structure for being provided between an operating state switching device of an isolating circuit breaker and a handcart lock lever, and locking or unlocking the handcart lock lever according to the operating state of the isolating circuit breaker, characterized in that, Includes linkage assembly, linkage plate and limit rod; The linkage plate is configured to slide horizontally, and it is connected to the linkage assembly and used to connect to the working state switching device. The limiting rod extends vertically and is connected to the linkage assembly. It can rise or fall as the linkage plate slides horizontally back and forth, thereby inserting into or pulling out of the preset limiting notch on the handcart lock rod.
2. The handcart interlock structure according to claim 1, wherein The linkage assembly includes a linkage seat, a linkage shaft, a first linkage, and a second linkage. The linkage seat is used to install into the operating mechanism of the isolating circuit breaker. The linkage shaft is rotatably mounted on the linkage seat. The first linkage and the second linkage are respectively connected to the two ends of the linkage shaft. The linkage plate is connected to one end of the first linkage, and the limiting rod is connected to one end of the second linkage.
3. The trolley interlock structure according to claim 2, wherein The connecting rod seat includes a seat plate, a fixed plate formed by bending one end of the seat plate along its length, and a pair of side plates formed by bending both sides of the seat plate. The side plates are provided with connecting rod shaft holes, and the connecting rod shaft passes through the connecting rod shaft holes. The first connecting rod and the second connecting rod are respectively installed on the ends of the connecting rod shaft that pass through the connecting rod seat.
4. The trolley interlock structure according to claim 3, wherein The end of the connecting rod seat away from the fixed plate extends in a direction away from the first connecting rod to form a limiting plate. A limiting hole is provided on the limiting plate, and the limiting rod passes through the limiting hole.
5. The handcart interlock structure of claim 1, wherein, The linkage plate has a connection hole for threading bolts to connect with the first connecting rod.
6. The handcart interlock structure according to claim 5, wherein The connecting hole extends vertically.
7. The handcart interlocking structure according to claim 1, characterized in that, It also includes a guide plate with a guide hole, the upper end of the limiting rod is connected to the second connecting rod, and the lower end of the limiting rod passes through the guide hole.
8. The handcart interlocking structure according to claim 7, characterized in that, One end of the guide plate is horizontally positioned and has the guide hole. The other end of the guide plate is bent downward to form a vertical structure and is fitted onto the locking rod during assembly.
9. The handcart interlocking structure according to claim 1, characterized in that, The end of the limiting rod that is inserted into the limiting notch has a clearance notch.
10. A circuit breaker comprising a trolley, the trolley including an operating mechanism, wherein a locking rod is transversely disposed within the operating mechanism, characterized in that, A limit notch is provided on the locking rod; It also includes the handcart interlocking structure according to any one of claims 1 to 9, wherein the limiting rod is pluggably inserted into the limiting notch.