Closing tripping assembly of spring operating mechanism for high-voltage circuit breaker

Abstract

The utility model relates to a switch-on tripping assembly of a spring operating mechanism for a high-voltage circuit breaker, which is mounted on an aluminum support and comprises a switch-on electromagnet, an energy storage retaining latch and a switch-on latch, the energy storage retaining latch is hinged to the aluminum support in a vertically swinging manner, a limiting pin shaft is fixedly connected to an energy storage gear, and the limiting pin shaft is hinged to the switch-on latch. A clamping groove matched with the limiting pin shaft is formed in the upper end of the energy storage maintaining latch, the closing latch is hinged to the aluminum support in a left-right swinging mode, the upper end of the closing latch is arranged on a downward swinging path of the energy storage maintaining latch, and the closing electromagnet drives the closing latch to swing left and right so that the upper end of the closing latch can avoid the energy storage maintaining latch. Compared with a traditional mechanism, buckling and releasing force is greatly reduced, the power of a release is correspondingly reduced, the overall buckling and releasing stability is greatly improved, the designed closing interlocking structure is low in part machining difficulty, convenient to install and high in reliability, and in the closing state, even if a closing signal is accessed through misoperation, the closing interlocking structure can be opened and closed. And the mechanism does not execute the closing operation.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker. Background Art

[0002] With the development of high voltage transmission technology, it is of great significance to realize long-distance and large-capacity transmission, optimize resource allocation and reduce environmental impact. Spring operating mechanism is widely used in high voltage circuit breakers due to its simple structure, small size, long life, no pollution to the environment, good resistance to weather conditions and high reliability.

[0003] The spring operating mechanisms currently used in large quantities in the market are mainly ratchet pawl energy storage or helical and spur gear multi-stage transmission energy storage structures. Generally, the power device drives the gear to rotate and compress the closing spring assembly to store energy. After the energy storage is completed, the energy storage gear needs to be limited by the closing release assembly to keep it in the energy storage state. When closing is required, the closing release assembly is triggered, and the energy storage gear rotates under the elastic force of the closing spring assembly and drives the output spline shaft to rotate to perform the closing operation. Therefore, the stability and sensitivity of the closing release assembly are very important, and it is required to maintain the closed state and be accurately triggered when closing is required.

[0004] In addition, since the energy storage gear can continue to store energy for the second time after the closing is completed, the energy storage gear is still limited by the closing release component. If the closing signal is connected by mistake, the mechanism will close again, affecting the reliability of the entire mechanism. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker.

[0006] The utility model is realized through the following technical scheme, and provides a closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker, which is installed on an aluminum support and comprises a closing electromagnet, an energy storage holding latch and a closing latch, wherein the energy storage holding latch is hinged on the aluminum support for swinging up and down, a limit pin is fixed on the energy storage gear, a card slot matched with the limit pin is provided on the upper end of the energy storage holding latch, the closing latch is hinged on the aluminum support for swinging left and right, the upper end of the closing latch is arranged on the path of the energy storage holding latch swinging downward, and the closing electromagnet drives the closing latch to swing left and right so that the upper end of the closing latch avoids the energy storage holding latch.

[0007] As an optimization, the middle part of the closing latch is hinged with the aluminum support, and the telescopic shaft of the closing electromagnet drives the lower end of the closing latch to swing. The closing electromagnet drives the lower end of the closing latch to swing, thereby driving the upper end of the closing latch to swing in the opposite direction.

[0008] As an optimization, the energy storage retaining latch is provided with a roller adapted to the upper end of the closing latch. The roller in this solution reduces the evasion resistance of the closing latch to evade the energy storage retaining latch.

[0009] As an optimization, the energy storage retaining catch is provided with a torsion spring for driving it to swing upward. The torsion spring in this solution drives the energy storage retaining catch to reset upward to block the limit pin.

[0010] As an optimization, a closing interlock assembly is also included, which includes a swing arm fixed to the output spline shaft and a card assembly hinged on the aluminum support, one end of the card assembly is connected to the swing arm through a connecting rod, and when the output spline shaft is in the closed state, the other end of the card assembly is located on the path of the upper end of the closing latch to avoid the energy storage holding latch. The closing interlock assembly set in this scheme, when in the closed state, even if the closing signal is connected by mistake, the mechanism will not perform the closing operation, thereby improving the reliability of the mechanism.

[0011] As an optimization, the card plate assembly includes a first card plate and a second card plate coaxially hinged on an aluminum support, a lower pressure shaft is fixedly connected to the second card plate, and when the first card plate swings downward, the lower pressure shaft drives the second card plate to swing upward to avoid the closing catch. In this solution, the downward swing of the first card plate after the opening of the gate can drive the second card plate to swing upward, but the upward swing of the first card plate will not drive the second card plate to swing downward, so after closing the gate, the second card plate can only be reset downward by the action of the torsion spring to prevent the second card plate from making hard contact with the upper end of the closing catch when the upper end of the closing catch is in the left position, thereby damaging the card plate assembly or the connecting rod.

[0012] As an optimization, one end of the connecting rod is hinged to the swing arm, and the other end is hinged to the card assembly. In this solution, both ends of the connecting rod are hinged, so that the swing of the swing arm drives the card assembly to swing.

[0013] The beneficial effects of the utility model are as follows: the closing and tripping components of the spring operating mechanism for a high-voltage circuit breaker of the utility model have greatly reduced snap-on and tripping forces compared to traditional mechanisms, the power of the tripper is correspondingly reduced, the overall snap-on and tripping stability is greatly improved, and a new closing interlocking structure is designed. Compared with the traditional interlocking structure, the parts processing difficulty is low, the installation is convenient, and the reliability is high. In the closed state, even if the closing signal is connected by erroneous operation, the mechanism will not perform the closing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the use state of the utility model;

[0015] Figure 2 This is a schematic diagram of the utility model in the energy storage state;

[0016] Figure 3This is a schematic diagram of the operation of the utility model when closing the switch;

[0017] Figure 4 It is a schematic diagram of the closing interlocking assembly of the utility model in the closing state;

[0018] Figure 5 This is a schematic diagram of the disassembly of the first card board and the second card board of the utility model;

[0019] As shown in the figure:

[0020] 1. Aluminum support, 2. Driving assembly, 3. Output spline shaft, 4. Closing interlock assembly, 4-1. Swing arm, 4-2. Connecting rod, 4-3. First clamp, 4-4. Second clamp, 4-5. Lower pressure shaft, 5. Energy storage spline shaft, 5-1. Energy storage gear, 6-1. Closing spring pull plate, 6-2. Closing spring pressure shaft, 6-3. Travel switch, 7. Closing spring assembly, 8-1. Energy storage holding latch, 8-2. Closing latch, 8-3. Closing electromagnet, 8-4. Limit pin shaft. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0022] like Figures 1 to 5 As shown, a closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker of the utility model is installed on an aluminum support 1. The aluminum support 1 is an integral fixing frame of the spring operating mechanism and is integrally cast.

[0023] The closing release assembly includes a closing electromagnet 8-3, an energy storage holding latch 8-1 and a closing latch 8-2.

[0024] The energy storage retaining latch 8-1 is hinged on the aluminum support 1 to swing up and down. Figure 1-4 As shown, the right end of the energy storage retaining latch 8-1 is hinged to the aluminum support 1, so that the left end can swing up and down, and the energy storage retaining latch 8-1 is equipped with a torsion spring that drives it to swing upward.

[0025] A limit pin 8-4 is fixedly connected to the energy storage gear 5-1, and the limit pin 8-4 is fixedly connected to the side of the energy storage gear 5-1. A slot matching the limit pin 8-4 is provided at the upper end of the energy storage retaining latch 8-1, and the limit pin 8-4 is stuck in the slot. The minimum distance between the energy storage retaining latch 8-1 and the center of the energy storage spline shaft 5 is greater than the distance from the center of the limit pin 8-4 to the center of the energy storage spline shaft 5, so that when the energy storage retaining latch 8-1 is in a free state, the limit pin 8-4 can push open the energy storage retaining latch 8-1.

[0026] The closing latch 8-2 ​​is hinged on the aluminum support 1 for swinging left and right. In this embodiment, the middle part of the closing latch 8-2 ​​is hinged to the aluminum support 1, so the upper and lower ends can swing left and right in opposite directions.

[0027] The upper end of the closing pawl 8-2 is arranged on the path of the energy storage holding pawl 8-1 swinging downward, and the energy storage holding pawl 8-1 is provided with a roller adapted to the upper end of the closing pawl 8-2. In the energy storage state, the upper end of the closing pawl 8-2 swings to the path of the energy storage holding pawl 8-1 avoiding the limit pin 8-4, so that in the energy storage state, the upper end of the closing pawl 8-2 presses under the energy storage holding pawl 8-1.

[0028] The closing electromagnet 8-3 drives the closing latch 8-2 ​​to swing left and right so that the upper end of the closing latch 8-2 ​​avoids the energy storage holding latch 8-1. In this embodiment, the telescopic shaft of the closing electromagnet 8-3 drives the lower end of the closing latch 8-2 ​​to swing.

[0029] Specifically, in this embodiment, the telescopic axis of the closing electromagnet 8-3 is located on the left side of the lower end of the closing latch 8-2. When closing, the closing electromagnet 8-3 pushes the lower end of the closing latch 8-2 ​​to swing so that the upper end of the closing latch 8-2 ​​swings to the left to avoid the energy storage holding latch 8-1.

[0030] Since the energy storage gear 5 - 1 can store energy again in both the closed state and the open state, the energy storage holding latch 8 - 1 should be prevented from being triggered in the closed state. Therefore, the closing release assembly of the present application also includes a closing interlock assembly 4 .

[0031] Figure 4 It is a schematic diagram of the energy storage state and the closing state, the closing interlock assembly 4 includes a swing arm 4-1 fixedly connected to the output spline shaft 13, and a card plate assembly hinged on the aluminum support 1, one end of the card plate assembly is connected to the swing arm 4-1 through a connecting rod 4-2, the upper end of the connecting rod 4-2 is hinged to the swing arm 4-1, and the lower end of the connecting rod 4-2 is hinged to the left end of the card plate assembly.

[0032] When the output spline shaft 13 is in the closed state, the other end of the card assembly is located on the path where the upper end of the closing latch 8-2 ​​avoids the energy storage holding latch 8-1. In this embodiment, the right end of the card assembly is located on the left side of the upper end of the closing latch 8-2, thereby preventing it from swinging to the left. Therefore, when the circuit is closed, even if the closing signal is connected by mistake, the mechanism will not perform the closing operation, which improves the reliability of the mechanism.

[0033] The clamping plate assembly includes a first clamping plate 4-3 and a second clamping plate 4-4 coaxially hinged on the aluminum support 1, and the second clamping plate 4-4 is fixedly connected with a lower pressure shaft 4-5 located on the left side of the common hinge axis, and the second clamping plate 4-4 is equipped with a torsion spring driving its right end to swing downward. When the first clamping plate 4-3 swings downward, the second clamping plate 4-4 is driven to swing upward through the lower pressure shaft 4-5 to avoid the closing latch 8-2.

[0034] The purpose of this arrangement is that when the first card plate 4-3 swings downward after the switch is opened, it can drive the second card plate 4-4 to swing upward, but when the first card plate 4-3 swings upward, it will not drive the second card plate 4-4 to swing upward. Therefore, after closing the switch, the second card plate 4-4 can only be reset downward by the action of the torsion spring to prevent the second card plate 4-4 from making hard contact with the upper end of the closing catch 8-2 ​​when moving downward when the upper end of the closing catch 8-2 ​​is in the left position, thereby damaging the card plate assembly or the connecting rod 4-2.

[0035] The use of the utility model:

[0036] like Figure 1 As shown, the driving assembly 2 drives the energy storage gear 5-1 to rotate, so that the energy storage gear 5-1 moves along Figure 1 The energy storage gear 5-1 rotates, driving the symmetrically arranged closing spring pull plate 6-1, and compressing the closing spring assembly 7 through the closing spring pressure shaft 6-2 to store energy.

[0037] The energy storage gear 5-1 rotates counterclockwise and passes the limit point. The limit pin 8-4 fixed to the energy storage gear 5-1 presses on the energy storage retaining catch 8-1. The closing catch 8-2 ​​swings to the bottom of the energy storage retaining catch 8-1 under the action of the torsion spring, so that the energy storage retaining catch 8-1 cannot avoid the limit pin 8-4, so that the energy storage gear 5-1 cannot continue to rotate, the energy storage ends, and the energy of the closing spring assembly is retained. Figure 2 Status shown.

[0038] Closing process: Figure 3 As shown, the closing electromagnet 8-3 pushes the lower end of the closing latch 8-2 ​​to swing so that the upper end of the closing latch 8-2 ​​avoids the energy storage holding latch 8-1, and the energy storage holding latch 8-1 rotates to the clear position under the locking force of the limit pin shaft 8-4, and the energy storage gear 5-1 continues to rotate to complete the closing action.

[0039] After closing the circuit breaker, Figure 4 As shown, after the output spline shaft 3 rotates to the closing position, the swing arm 4-1 in the closing interlock assembly 4 drives the left end of the card assembly to swing up and down through the connecting rod 4-2, so that the right end of the card assembly presses against the left side of the upper end of the closing latch 8-2, thereby limiting its counterclockwise rotation. Therefore, when the closing state is reached, even if the closing signal is connected by mistake, the mechanism will not perform the closing operation, thereby improving the reliability of the mechanism.

[0040] When the gate is opened, the swing arm 4-1 drives the first card plate 4-3 at the left end of the card plate assembly to swing downward through the connecting rod 4-2. When the first card plate 4-3 swings downward, it presses down the pressing shaft 4-5, thereby driving the second card plate 4-4 to swing upward to avoid the closing latch 8-2.

[0041] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker, mounted on an aluminum support (1), characterized in that: The invention comprises a closing electromagnet (8-3), an energy storage holding latch (8-1) and a closing latch (8-2); the energy storage holding latch (8-1) is hinged on an aluminum support (1) for swinging up and down; a limit pin (8-4) is fixedly connected to an energy storage gear (5-1); a slot matching the limit pin (8-4) is provided at the upper end of the energy storage holding latch (8-1); the closing latch (8-2) is hinged on the aluminum support (1) for swinging left and right; the upper end of the closing latch (8-2) is arranged on a path for the energy storage holding latch (8-1) to swing downward; the closing electromagnet (8-3) drives the closing latch (8-2) to swing left and right so that the upper end of the closing latch (8-2) avoids the energy storage holding latch (8-1).

2. The closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The middle part of the closing latch (8-2) is hinged to the aluminum support (1), and the telescopic shaft of the closing electromagnet (8-3) pushes the lower end of the closing latch (8-2) to swing.

3. The closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The energy storage retaining latch (8-1) is provided with a roller adapted to the upper end of the closing latch (8-2).

4. The closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The energy storage retaining latch (8-1) is provided with a torsion spring for driving it to swing upward.

5. A closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker according to any one of claims 1 to 4, characterized in that: It also includes a closing interlock assembly (4), the closing interlock assembly (4) comprising a swing arm (4-1) fixedly connected to the output spline shaft (3) and a clamping plate assembly hinged on the aluminum support (1), one end of the clamping plate assembly being connected to the swing arm (4-1) via a connecting rod (4-2), and the other end of the clamping plate assembly being located on a path where the upper end of the closing latch (8-2) avoids the energy storage holding latch (8-1) when the output spline shaft (3) is in a closing state.

6. The closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker according to claim 5, characterized in that: The clamping plate assembly comprises a first clamping plate (4-3) and a second clamping plate (4-4) coaxially hinged on an aluminum support (1); a lower pressure shaft (4-5) is fixedly connected to the second clamping plate (4-4); when the first clamping plate (4-3) swings downward, the lower pressure shaft (4-5) drives the second clamping plate (4-4) to swing upward to avoid the closing latch (8-2).

7. The closing and tripping assembly of a spring operating mechanism for a high-voltage circuit breaker according to claim 5, characterized in that: One end of the connecting rod (4-2) is hinged to the swing arm (4-1), and the other end is hinged to the clamping plate assembly.

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