Ring main unit circuit breaker mechanism and lower door high-reliability interlock

Abstract

The utility model belongs to the technical field of ring main units, in particular to a ring main unit circuit breaker mechanism and lower door high-reliability interlock, which comprises a cabinet body, a lower door and an interlocking assembly, and is characterized in that the interlocking assembly comprises a first interlocking rod and a second interlocking rod, and the first interlocking rod can move up and down relative to a bottom plate; the first interlocking rod moves downwards to drive the second interlocking plate to rotate anticlockwise to be away from the opening baffle, opening can be allowed at the moment, opening and closing are achieved through the second interlocking plate, and the product reliability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ring network cabinets, in particular to a high-reliability interlocking between a circuit breaker mechanism and a lower door of a ring network cabinet. Background Art

[0002] Switchgear should be equipped with "five-protection interlock" to ensure the personal safety of equipment and operators. The concept of five-protection interlock is as follows: 1. Prevent disconnection and closing of disconnectors under load; 2. Prevent mis-opening and mis-closing of circuit breakers; 3. Prevent closing of grounding interlocks under load; 4. Prevent load from being delivered when grounding interlocks are closed; 5. Prevent mistaken entry into live intervals. In order to avoid accidents caused by misoperation, reliable interlocking and locking devices should be set for switchgear to ensure the correctness of operating procedures and prevent the above five misoperations. This is the so-called "five protections"; usually refers to the "five protections" of high-voltage switchgear or the "five protections and one interlock" of transformer and distribution room. "; The five-protection lock is a lock installed to achieve the above five-protection measures. To achieve the five-protection function, it is also necessary to cooperate with the microcomputer five-protection system or to implement it through strict personnel five-protection operation rules; To ensure the safety during operation, ensure the following two points; 1. It is necessary to ensure that when the lower door is in the closed state, the lower door cannot be opened when the grounding operating shaft rotates to the grounding opening position; 2. Ensure that the circuit breaker cannot be opened when the lower door is in the open state; when the upper isolation environmental protection cabinet is repaired, the grounding circuit must be connected; when the lower door is opened, the circuit breaker opening should be mechanically forced and reliably locked, and opening is not allowed.

[0003] Chinese patent CN218769175U discloses an insert-type cabinet door interlocking mechanism for an upper isolation and lower circuit breaker switch cabinet. When the grounding operating shaft rotates to the opening position, the grounding lower door interlocking group can limit the interlocking rod from moving upward, which can ensure that the interlocking rod can reliably lock the lower door and the lower door cannot be opened; when the grounding operating shaft rotates to the closing position, the interlocking rod loses the limit of the grounding lower door interlocking group, and the interlocking rod can move upward, so that the lower door can be opened; the lower door limit group can realize reliable locking or unlocking of the lower door with the isolation operating mechanism and the circuit breaker operating mechanism. When the lower door is opened, the lower door limit group limits the interlocking rod from moving downward, and the interlocking rod can lock the opening half shaft through the lower door interlocking plate to prevent the circuit breaker operating mechanism from performing the opening operation, and when the lower door is closed in place, the lower door limit group and the interlocking rod are freely matched, and the interlocking rod is inserted into the interlocking hole of the lower door due to its own gravity to realize the interlocking of the interlocking rod and the lower door, and the interlocking plate moves up and down to block the opening half shaft, which is unreliable and easy to trip the circuit breaker by mistake. Utility Model Content

[0004] In order to solve the problems mentioned in the above background technology, a high-reliability interlocking of a circuit breaker mechanism of a ring main unit and a lower door with simple structure and high reliability is proposed.

[0005] The technical solution of the utility model is a highly reliable interlocking of a circuit breaker mechanism of a ring network cabinet and a lower door, comprising a cabinet body, a lower door, and an interlocking assembly. The interlocking assembly comprises a first interlocking rod and a second interlocking rod, and the first interlocking rod can move up and down relative to a bottom plate.

[0006] Preferably, a switch-off half-shaft is provided on one side of the first interlocking rod, and the switch-off half-shaft includes a switch-off baffle; the movement of the first interlocking rod can drive the second interlocking rod to rotate relative to it.

[0007] Preferably, when the grounding is closed, the first interlock rod moves upward and drives the second interlock rod to rotate clockwise, and at this time one side of the second interlock rod abuts against the opening baffle; when the lower door is closed, the first interlock rod moves downward, driving the second interlock rod to rotate counterclockwise, and at this time the second interlock rod is away from the opening baffle.

[0008] Preferably, the second interlocking rod is rotatably connected to the base plate, the first interlocking rod is located above the second interlocking rod, and a support plate is provided between the first interlocking rod and the second interlocking rod, and the support plate is used to fix the first interlocking rod.

[0009] Preferably, bolt assemblies are provided on both sides of the gate-dividing baffle, and the bolt assemblies are used to limit the gate-dividing baffle.

[0010] Preferably, the lower door and the first interlocking rod are connected via a locking shaft.

[0011] Preferably, the first interlocking rod is provided with a plurality of guide grooves for limiting the moving range of the first interlocking rod.

[0012] Preferably, a guide column is provided on one side of the first interlocking rod, the guide column is provided with a swinging piece, a clamping groove is provided on one side of the first interlocking rod close to the swinging piece, and the swinging piece is clamped with the first interlocking rod.

[0013] Preferably, the first interlocking rod and the second interlocking rod are both metal parts.

[0014] Preferably, a grounding interlocking piece is provided above the first interlocking rod, and the first interlocking rod and the grounding interlocking piece are connected via a reset spring.

[0015] Compared with the prior art, the utility model provides a highly reliable interlocking between the circuit breaker mechanism of a ring main unit and the lower door, which has the beneficial effects that when the first interlocking rod rises, it drives the second interlocking rod to rotate clockwise and abut against the opening baffle to prevent opening, thereby improving the safety during operation; when the first interlocking rod moves downward, it drives the second interlocking rod to rotate counterclockwise away from the opening baffle, at which time opening is allowed, and opening and closing are achieved through the second interlocking rod, thereby improving the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model.

[0018] Figure 2 It is a cross-sectional view of an embodiment of the utility model.

[0019] Figure 3 for Figure 2 A-axis enlarged view.

[0020] Reference numerals

[0021] 1-cabinet; 2-lower door; 3-first interlocking rod; 31-guide slot; 32-card slot; 4-second interlocking rod; 5-bottom plate; 6-opening half shaft; 61-opening baffle; 7-support plate; 8-bolt assembly; 9-interlocking shaft; 10-guide column; 101-swinging member; 11-grounding interlocking member; 111-reset spring; DETAILED DESCRIPTION

[0022] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0024] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0027] like Figures 1 to 3 As shown, a ring main unit circuit breaker mechanism and a lower door high-reliability interlocking include a cabinet body 1, a lower door 2, and an interlocking assembly, wherein the interlocking assembly includes a first interlocking rod 3 and a second interlocking rod 4, wherein the first interlocking rod 3 can move up and down relative to a bottom plate 5; a switch-off semi-axis 6 is provided on one side of the first interlocking rod 3, and the switch-off semi-axis 6 includes a switch-off baffle 61; the movement of the first interlocking rod 3 can drive the second interlocking rod 4 to rotate relatively; when the grounding is closed, the first interlocking rod 3 moves upward to drive the second interlocking rod 4 to rotate clockwise, and at this time, one side of the second interlocking rod 4 abuts against the switch-off baffle 61; when the lower door 2 is closed, the first interlocking rod 3 moves downward to drive the second interlocking rod 4 to rotate clockwise; The locking rod 4 rotates counterclockwise, and the second interlocking rod 4 is away from the opening baffle 61; when the first interlocking rod 3 rises, it drives the second interlocking rod 4 to rotate clockwise and abut against the opening baffle 61 to prevent it from opening, thereby improving the safety during operation; the first interlocking rod 3 moves downward and drives the second interlocking rod 4 to rotate counterclockwise away from the opening baffle 61, at which time opening is allowed, and opening and closing are achieved through the second interlocking rod 4, thereby improving the reliability of the product; it has five-protection interlocking to ensure the personal safety of equipment and operators, and during maintenance, the grounding circuit must be connected; when the lower door 2 is opened, the opening half-shaft 6 is in the opening state and is forcibly and reliably locked by the wind gate baffle, and opening is not allowed.

[0028] like Figure 1 , Figure 3As shown, the second interlocking rod 4 is rotatably connected to the base plate 5, the first interlocking rod 3 is located above the second interlocking rod 4, and a support plate 7 is provided between the first interlocking rod 3 and the second interlocking rod 4, and the support plate 7 is used to fix the first interlocking rod 3; bolt assemblies 8 are provided on both sides of the gate-breaking baffle 61, and the bolt assemblies 8 are used to limit the gate-breaking baffle 61; the lower door 2 and the first interlocking rod 3 are connected by a locking shaft 9; the first interlocking rod 3 is provided with a plurality of guide grooves 31, which are used to limit the moving range of the first interlocking rod 3; a guide column 10 is provided on one side of the first interlocking rod 3, and the guide column 10 is provided with a swinging member 101, and a clamping groove 32 is provided on the side of the first interlocking rod 3 close to the swinging member 101, and the swinging member 101 is clamped with the first interlocking rod 3; a grounding chain member 11 is provided above the first interlocking rod 3, and the first interlocking rod 3 and the grounding chain member 11 are connected by a reset spring 111, and the grounding chain member 11 can drive the first interlocking rod 3 to move up and down.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door, characterized in that: The cabinet comprises a cabinet body, a lower door and an interlocking assembly. The interlocking assembly comprises a first interlocking rod and a second interlocking rod. The first interlocking rod can move up and down relative to a bottom plate.

2. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: A switch-off half-shaft is provided on one side of the first interlocking rod, and the switch-off half-shaft includes a switch-off baffle; the movement of the first interlocking rod can drive the second interlocking rod to rotate relatively.

3. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 2, characterized in that: When the grounding is closed, the first interlock rod moves upward and drives the second interlock rod to rotate clockwise. At this time, one side of the second interlock rod abuts against the opening baffle; when the lower door is closed, the first interlock rod moves downward, driving the second interlock rod to rotate counterclockwise. At this time, the second interlock rod is away from the opening baffle.

4. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: The second interlocking rod is rotatably connected to the bottom plate, the first interlocking rod is located above the second interlocking rod, and a support plate is provided between the first interlocking rod and the second interlocking rod, and the support plate is used to fix the first interlocking rod.

5. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 2, characterized in that: Bolt assemblies are provided on both sides of the gate-breaking baffle, and the bolt assemblies are used to limit the gate-breaking baffle.

6. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: The lower door is connected to the first interlocking rod via a locking shaft.

7. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: The first interlocking rod is provided with a plurality of guide grooves for limiting the moving range of the first interlocking rod.

8. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: A guide column is provided at one side of the first interlocking rod, and a swinging piece is provided at the guide column. A clamping groove is provided at one side of the first interlocking rod close to the swinging piece, and the swinging piece is clamped with the first interlocking rod.

9. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: The first interlocking rod and the second interlocking rod are both metal parts.

10. A high-reliability interlocking mechanism of a ring main unit circuit breaker and a lower door as claimed in claim 1, characterized in that: A grounding interlocking piece is provided above the first interlocking rod, and the first interlocking rod and the grounding interlocking piece are connected via a reset spring.

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