Interlock device for locking and braking high-voltage switch cabinet

Abstract

This utility model relates to the field of switchgear technology, specifically a high-voltage switchgear interlocking device with locking and braking mechanism. It includes: a circuit breaker installed inside the cabinet, and a grounding post slidably mounted on the cabinet. The cabinet door is rotatably connected to a door hinge fixedly mounted inside the cabinet. The grounding post is connected to a lifting structure mounted on the cabinet. A linkage locking mechanism is also provided inside the cabinet, comprising a triggering component, a linkage component, and a locking component. When the cabinet is operating normally, the linkage locking mechanism locks the cabinet door and, in conjunction with the lifting structure, separates the grounding post from the ground. When the cabinet malfunctions, the circuit breaker trips, triggering the triggering component, which in turn drives the linkage component to unlock the cabinet door. During unlocking, the lifting structure drives the grounding post to ground quickly. By utilizing the cooperation between the components, the device achieves the purpose of locking the door when energized and grounding when de-energized.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically a locking and braking interlocking device for high-voltage switchgear. Background Technology

[0002] High-voltage switchgear interlocking devices are critical components used in switchgear to prevent misoperation and ensure the safety of personnel and equipment. Currently, electrical interlocking can be used to achieve switchgear locking and braking: by using electrical components such as relays, contactors, and electromagnetic locks, and utilizing the normally open or normally closed contacts of circuit breakers to control the operating circuit.

[0003] Electrical interlocking offers high flexibility, enabling the implementation of complex logic and facilitating expansion and modification. However, in practical use, it relies on power supply and electrical components. If a component fails, the interlocking may fail, causing abnormal locking and braking of the switchgear, which could easily lead to electric shock risks to personnel. Utility Model Content

[0004] The purpose of this utility model is to provide a locking and braking interlocking device for high-voltage switchgear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A locking and braking interlocking device for high-voltage switchgear includes: The circuit breaker is installed inside the cabinet, and the grounding post is slidably installed on the cabinet. The cabinet door is rotatably connected to the door hinge that is fixedly installed inside the cabinet. The grounding post is connected to the lifting structure installed on the cabinet; The cabinet is also equipped with a linkage locking mechanism, which includes a triggering component, a linkage component, and a locking component. When the cabinet is working normally, the linkage locking mechanism can lock the cabinet door and cooperate with the lifting structure to separate the grounding post from the ground. When the cabinet is abnormal, the circuit breaker performs a tripping action, which triggers the triggering component, thereby driving the linkage component to drive the locking component to unlock the cabinet door. During the unlocking process, the lifting structure can drive the grounding post to quickly ground.

[0006] The high-voltage switchgear interlocking device for locking and braking as described above: the lifting structure includes a lifting rod fixedly connected to the grounding post, the lifting rod is slidably connected to a fixing member provided on the cabinet, and a spring is also sleeved on the lifting rod, one end of the spring abutting against the fixing member, and the other end abutting against a baffle formed on the lifting rod.

[0007] The high-voltage switchgear interlocking device for locking and braking as described above: the triggering component includes a second connecting rod that is slidably arranged along the width direction of the cabinet. One end of the second connecting rod is provided with a toothed plate, and the other end is provided with a second sliding rod. The toothed plate meshes with a gear that is coaxially fixed to the switch blade of the circuit breaker.

[0008] The high-voltage switchgear interlocking device for locking and braking as described above: the locking assembly includes a first connecting rod that is slidably arranged along the width direction of the cabinet. One end of the first connecting rod is provided with a first sliding rod, and the other end is provided with a wedge block. The wedge block cooperates with an adapting part that is slidably arranged coaxially in the door hinge, which can drive the lifting rod to move up and down.

[0009] The high-voltage switchgear interlocking device for locking and braking as described above: the adapter includes a trigger rod coaxially disposed within the door hinge, one end of the trigger rod facing the wedge block is provided with an arc-shaped surface, and the other end is fixedly connected to the lifting rod.

[0010] The high-voltage switchgear interlocking device for locking and braking as described above: the linkage component includes a deflector rod rotatably installed inside the cabinet, the deflector rod having a first slide groove and a second slide groove, the first slide rod being slidably disposed in the first slide groove, and the second slide rod being slidably disposed in the second slide groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are: By setting up a linkage locking mechanism, and utilizing the mechanical cooperation between the triggering component, linkage component, locking component and lifting structure, the purpose of locking the door when the power is on and grounding when the power is off can be achieved. This ensures that the cabinet door is reliably locked when the switchgear is working normally with power on, effectively preventing personnel from entering the energized compartment and preventing the risk of electric shock. Furthermore, in the event of a circuit breaker malfunction, the cabinet door can be automatically unlocked, opening the door to prepare for maintenance. At the same time, the grounding post is quickly released to reliably ground the cabinet, ensuring that the cabinet is not energized. The entire process is fast and requires no manual intervention. Meanwhile, a partition is set up below the cabinet to block the grounding post, which can effectively prevent the accumulation of foreign objects on the ground from affecting the contact between the grounding post and the ground, and ensure that the grounding post can be grounded normally. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of the interlocking device for locking and braking high-voltage switchgear.

[0013] Figure 2 A schematic diagram of the internal structure of the interlocking device for locking and braking high-voltage switchgear.

[0014] Figure 3 A schematic diagram of the linkage locking mechanism in the interlocking device of a high-voltage switchgear for locking and braking.

[0015] Figure 4 A schematic diagram of the structure of the lifting component and the cabinet door in the interlocking device of the high-voltage switchgear for locking and braking.

[0016] Figure 5 A schematic diagram of the lifting assembly and adapting components in a high-voltage switchgear interlocking device for locking and braking.

[0017] Figure 6 A schematic diagram of the linkage locking mechanism in the interlocking device of a high-voltage switchgear for locking and braking.

[0018] Figure 7 A schematic diagram of the triggering component, linkage component, and locking component in the interlocking device of a high-voltage switchgear for locking and braking.

[0019] In the diagram: 1. Cabinet body; 101. Partition; 2. Cabinet door; 201. Locking groove; 3. Grounding post; 4. Lifting rod; 401. Baffle plate; 5. Fixing component; 6. Spring; 7. Circuit breaker; 8. Gear plate; 9. Deflection rod; 901. First slide groove; 902. Second slide groove; 10. Wedge block; 1001. Trigger surface; 11. Trigger rod; 1101. Arc surface; 12. Door hinge; 1201. Insertion groove; 13. Gear; 14. First connecting rod; 1401. First slide rod; 15. Second connecting rod; 1501. Second slide rod. Detailed Implementation

[0020] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0021] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0022] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0023] Please see Figures 1-7 In this embodiment of the present invention, a high-voltage switchgear interlocking device for locking and braking includes: The circuit breaker 7 is installed inside the cabinet 1, and the grounding post 3 is slidably installed on the cabinet 1. The cabinet door 2 of the cabinet 1 is rotatably connected to the door hinge 12 fixedly installed inside the cabinet 1. In particular, please see Figure 4 The cabinet door 2 and the door hinge 12 are respectively provided with a locking groove 201 and a plug groove 1201. The locking groove 201 and the plug groove 1201 are adapted to each other so that the linkage locking mechanism set in the cabinet body 1 can lock the cabinet door 2.

[0024] The grounding post 3 is connected to the lifting structure installed on the cabinet 1; Specifically, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 The lifting structure includes a lifting rod 4 fixedly connected to the grounding post 3. The lifting rod 4 is slidably connected to the fixing member 5 set on the cabinet 1. A spring 6 is also sleeved on the lifting rod 4. One end of the spring 6 abuts against the fixing member 5, and the other end abuts against the baffle 401 formed on the lifting rod 4. In particular, please see Figure 1 , Figure 2 Below the cabinet 1, there is a partition 101. The partition 101 can surround and block the grounding post 3 to prevent foreign objects from appearing on the ground below the grounding post 3 when the cabinet 1 is placed for a long time, so as to affect the subsequent contact between the grounding post 3 and the ground.

[0025] Further, please refer to Figure 2 , Figure 6 , Figure 7 The cabinet 1 is also equipped with a linkage locking mechanism, which includes a triggering component, a linkage component, and a locking component. When the cabinet 1 is working normally, the linkage locking mechanism can lock the cabinet door 2 and cooperate with the lifting structure to separate the grounding post 3 from the ground. When the cabinet 1 is abnormal, the circuit breaker 7 performs a tripping action to trigger the triggering component, thereby driving the linkage component to drive the locking component to unlock the cabinet door 2. During the unlocking process, the lifting structure can drive the grounding post 3 to quickly ground. The triggering component includes a second connecting rod 15 that is slidably arranged along the width direction of the cabinet 1. One end of the second connecting rod 15 is provided with a toothed plate 8, and the other end is provided with a second sliding rod 1501. The toothed plate 8 meshes with a gear 13 that is coaxially fixed to the switch of the circuit breaker 7. It should be noted that the frictional force between the switch of the circuit breaker 7 and the circuit breaker 7 is greater than the maximum elastic potential energy stored in the spring 6 in this invention, so that the components can cooperate with each other to lock the cabinet door 2. The locking assembly includes a first connecting rod 14 that is slidably disposed along the width direction of the cabinet 1. One end of the first connecting rod 14 is provided with a first sliding rod 1401, and the other end is provided with a wedge block 10. The wedge block 10 cooperates with an adaptor that is slidably disposed coaxially in the door hinge 12, and can drive the lifting rod 4 to rise and fall. Preferably, please refer to Figure 7 The aforementioned wedge block 10 is configured in the form of a "right-angled trapezoidal structure", and its inclined waist surface is set as the trigger surface 1001.

[0026] The adaptor includes a trigger rod 11 coaxially disposed within the door hinge 12. One end of the trigger rod 11 facing the wedge block 10 is provided with an arc-shaped surface 1101, and the other end is fixedly connected to the lifting rod 4. In particular, please see Figure 4 , Figure 5 The spring 6 is always in a compressed state, pushing the baffle 401 and the lifting rod 4 to tend to descend in the vertical direction. In the initial state, that is, when the switch cabinet is in normal working state, the circuit breaker 7 is in the closed state. At this time, in order to ensure safety, the cabinet door 2 of the cabinet 1 should be locked to prevent personnel from accidentally entering the live compartment.

[0027] The linkage component includes a deflection rod 9 rotatably installed inside the cabinet 1. The deflection rod 9 has a first slide groove 901 and a second slide groove 902. The first slide rod 1401 is slidably disposed in the first slide groove 901, and the second slide rod 1501 is slidably disposed in the second slide groove 902. Based on the above, please refer to Figure 6 , Figure 7 In this embodiment, in the initial state, the first slide rod 1401 is located at the end of the stroke of the first slide groove 901 away from the rotation axis of the deflection rod 9, and the second slide rod 1501 is located at the end of the stroke of the second slide groove 902 away from the rotation axis of the deflection rod 9. At this time, the wedge block 10 is inserted into the insertion groove 1201 and the locking groove 201, thereby locking the cabinet door 2 and preventing the cabinet door 2 from being opened. At the same time, the trigger surface 1001 of the wedge block 10 contacts the arc surface 1101, which can force the trigger rod 11 to drive the lifting rod 4 to pull the grounding post 3 away from the ground, so that the switch cabinet can work normally.

[0028] When the switchgear malfunctions and the internal circuit breaker 7 trips, the switch blade drives the gear 13 to deflect. The gear 13 then engages with the toothed plate 8, causing the toothed plate 8 to move the second connecting rod 15 towards the door hinge 12. During this process, the second sliding rod 1501 engages with the second sliding groove 902, driving the deflection rod 9 to deflect counterclockwise (see reference). Figure 6 , Figure 7(Description) During this process, the first slide groove 901 cooperates with the first slide rod 1401 to drive the first connecting rod 14 to pull the wedge block 10 out of the locking groove 201 and the plug groove 1201. Immediately afterwards, the supporting force of the trigger surface 1001 on the trigger rod 11 disappears, the spring 6 releases its elastic potential energy, and drives the lifting rod 4 to lower the grounding post 3 so that the grounding post 3 contacts the ground. This allows the switch cabinet 1 to quickly complete the grounding work when the switch cabinet is abnormal, so that the cabinet 1 is not energized. At the same time, the locked state of the cabinet door 2 is unlocked so that maintenance personnel can open the cabinet for maintenance.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A locking and braking interlocking device for a high-voltage switchgear, comprising: A circuit breaker (7) installed inside the cabinet (1), and a grounding post (3) slidably mounted on the cabinet (1), wherein the cabinet door (2) of the cabinet (1) is rotatably connected to a door hinge (12) fixedly installed inside the cabinet (1); characterized in that: The grounding post (3) is connected to the lifting structure installed on the cabinet (1); The cabinet (1) is also equipped with a linkage locking mechanism, which includes a triggering component, a linkage component and a locking component. When the cabinet (1) is working normally, the linkage locking mechanism can lock the cabinet door (2) and cooperate with the lifting structure to separate the grounding post (3) from the ground. When the cabinet (1) is abnormal, the circuit breaker (7) performs a tripping action to trigger the triggering component, thereby driving the linkage component to drive the locking component to unlock the cabinet door (2). During the unlocking process, the lifting structure can drive the grounding post (3) to quickly ground.

2. The high-voltage switchgear interlocking device for locking and braking according to claim 1, characterized in that, The lifting structure includes a lifting rod (4) fixedly connected to the grounding post (3). The lifting rod (4) is slidably connected to a fixing member (5) provided on the cabinet (1). A spring (6) is also sleeved on the lifting rod (4). One end of the spring (6) abuts against the fixing member (5), and the other end abuts against a baffle (401) formed on the lifting rod (4).

3. A high-voltage switchgear interlocking device for locking and braking according to claim 2, characterized in that, The triggering component includes a second connecting rod (15) that is slidably arranged along the width direction of the cabinet (1). One end of the second connecting rod (15) is provided with a toothed plate (8), and the other end is provided with a second sliding rod (1501). The toothed plate (8) meshes with a gear (13) that is coaxially fixed to the switch of the circuit breaker (7).

4. A high-voltage switchgear interlocking device for locking and braking according to claim 3, characterized in that, The locking assembly includes a first connecting rod (14) that is slidably disposed along the width direction of the cabinet (1). One end of the first connecting rod (14) is provided with a first sliding rod (1401), and the other end is provided with a wedge block (10). The wedge block (10) cooperates with an adaptor that is slidably disposed coaxially within the door hinge (12) to drive the lifting rod (4) to rise and fall.

5. A high-voltage switchgear interlocking device for locking and braking according to claim 4, characterized in that, The adapter includes a trigger rod (11) coaxially disposed within the door hinge (12). One end of the trigger rod (11) facing the wedge block (10) is provided with an arc-shaped surface (1101), and the other end is fixedly connected to the lifting rod (4).

6. A high-voltage switchgear interlocking device for locking and braking according to claim 4, characterized in that, The linkage component includes a deflection rod (9) rotatably installed in the cabinet (1). The deflection rod (9) is provided with a first slide groove (901) and a second slide groove (902). The first slide rod (1401) is slidably disposed in the first slide groove (901), and the second slide rod (1501) is slidably disposed in the second slide groove (902).

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