Interlocking device between circuit breaker and isolating switch

Abstract

The utility model discloses an interlocking device between a circuit breaker and an isolating switch in the field of electric power safety devices, which comprises a first shaft connected with an operating main shaft of the circuit breaker and a second shaft connected with an operating shaft of the isolating switch, the first shaft is connected with the second shaft through a connecting rod, and the second shaft is provided with a first working position and a second working position; when the circuit breaker is in a closed state, the second shaft is located at the first working position, and the isolating switch operation shaft cannot be operated; and when the circuit breaker is in an opening state, the second shaft is located at the second working position, and the isolating switch operation shaft can be operated. According to the utility model, the circuit breaker operation main shaft and the isolation switch operation shaft are connected through the first shaft, the second shaft and the connecting rod. When the circuit breaker operation main shaft moves, the second shaft is driven to move, so that the state of the isolation switch operation shaft is controlled, when the circuit breaker is closed, the isolation switch operation shaft cannot be operated, dangerous accidents are avoided, and the device is simple in structure and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of power safety devices, and in particular to an interlocking device between a circuit breaker and a disconnecting switch. Background Technology

[0002] An interlocking device is a safety device used to ensure safety when performing a series of operations under specific conditions. It prevents errors in the sequence of operations that could lead to accidents or hazards by interlocking and controlling the operation of different components or equipment.

[0003] Existing interlocking devices between outdoor high-voltage circuit breakers and disconnectors are mostly connected by welding during manufacturing, and the components occupy a large space, which cannot guarantee the accuracy and functional requirements. Utility Model Content

[0004] The purpose of this utility model is to provide an interlocking device between a circuit breaker and a disconnecting switch. By setting a first shaft, a second shaft, and a connecting rod, the main operating shaft of the circuit breaker and the operating shaft of the disconnecting switch are linked, so that the disconnecting switch cannot be operated when the circuit breaker is closed, thus ensuring the safety of the operator.

[0005] To solve the above technical problems, the following technical solution is adopted:

[0006] This utility model provides an interlocking device between a circuit breaker and a disconnecting switch, including a first shaft connected to the main operating shaft of the circuit breaker and a second shaft connected to the operating shaft of the disconnecting switch. The first shaft and the second shaft are connected by a connecting rod, and the second shaft has a first working position and a second working position.

[0007] When the circuit breaker is in the closed state, the second shaft is in the first working position, and the disconnecting switch operating shaft is locked.

[0008] When the circuit breaker is in the open state, the second shaft is in the second working position, and the disconnecting switch operating shaft is unlocked.

[0009] Optionally, one end of the first shaft is connected to the tripping shaft on the circuit breaker, the other end is connected to the connecting rod, and the middle part is connected to the main operating shaft of the circuit breaker. The first shaft is arranged perpendicular to the main operating shaft of the circuit breaker.

[0010] Optionally, when the circuit breaker is tripped, one end of the shaft is connected to a pointer plate, which is used to indicate the status of the circuit breaker, and the other end is connected to a first connecting piece. One end of the first connecting piece is provided with a U-shaped notch, and one end of the first shaft is disposed on the U-shaped notch.

[0011] Optionally, one end of the second shaft is hinged to the connecting rod, and the other end cooperates with a baffle on the disconnector operating shaft. The baffle is sleeved on the disconnector operating shaft. When the second shaft is in the first working position, the second shaft is positioned on the baffle, thereby restricting the rotation of the disconnector operating shaft. When the second shaft is in the second working position, the second shaft disengages from the baffle.

[0012] Optionally, the second shaft includes a first segment and a second segment, the first segment and the second segment are connected by a screw, and the other end of the second segment passes through the baffle of the disconnecting switch and cooperates with the baffle plate.

[0013] Optionally, the baffle is provided with a sleeve, and the second section extends through the sleeve.

[0014] Optionally, a second connecting piece is provided on one end of the connecting rod that is connected to the first shaft. One end of the second connecting piece is connected to the connecting rod, and a U-shaped notch is provided on the other end. The first shaft is disposed on the U-shaped notch.

[0015] Optionally, the end of the disconnector switch operating shaft is provided with an operating handle.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0017] This invention connects the circuit breaker operating main shaft and the disconnector operating shaft by setting a first shaft, a second shaft, and a connecting rod. When the circuit breaker operating main shaft moves, it drives the second shaft to move, thereby controlling the state of the disconnector operating shaft. When the circuit breaker is closed, the disconnector operating shaft cannot be operated, avoiding dangerous accidents. This invention has a simple structure, does not require additional circuit breaker and disconnector structures, and is easy to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation status of the interlocking device provided by this utility model;

[0019] Figure 2 This is a partial schematic diagram of the installation state of the interlocking device provided by this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the interlocking device provided by this utility model;

[0021] Figure 4 This is a partial schematic diagram of the interlocking device provided by this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Circuit breaker; 2. Circuit breaker operating spindle; 3. Disconnecting switch; 4. Disconnecting switch operating shaft; 5. First shaft; 6. Second shaft; 7. Connecting rod; 8. Opening shaft; 9. Pointer plate; 10. First connecting piece; 11. Second connecting piece; 12. U-shaped notch; 13. Baffle plate; 14. Sleeve; 15. Operating handle. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] like Figure 1 , Figure 2As shown in the figure, this embodiment provides an interlocking device between a circuit breaker and a disconnecting switch, including a first shaft 5 and a second shaft 6. The first shaft 5 is disposed inside the circuit breaker 1 and connected to the circuit breaker operating main shaft 2, and the second shaft 6 is disposed inside the disconnecting switch 3 and connected to the disconnecting switch operating shaft 4. The first shaft 5 and the second shaft 6 are connected by a connecting rod 7. The connecting rod 7 is disposed through the side plate of the circuit breaker 1, with one end located inside the circuit breaker 1 and connected to the first shaft 5, and the other end located inside the disconnecting switch 3 and connected to the second shaft 6.

[0028] The second shaft 6 has two working positions. When the circuit breaker 1 is closed, the second shaft 6 is in the first working position, and the disconnector switch operating shaft cannot be operated. When the circuit breaker 1 is open, the second shaft 6 is in the second working position, and the disconnector switch 3 can be operated.

[0029] The operating mechanism inside the circuit breaker 1 is used to quickly disconnect and close the circuit. The operating mechanism is connected to the circuit breaker operating spindle 2, which is connected to the first shaft 5 and moves when the operating mechanism is started. Then it drives the first shaft 5 to move, thereby driving the second shaft 6 to switch between the two working positions.

[0030] Example 2

[0031] The difference between this embodiment and Embodiment 1 is that: one end of the first shaft 5 is connected to the tripping shaft 8, which extends through the side wall of the circuit breaker 1 to the outer wall and is connected to the pointer plate 9 on the outer wall. The pointer plate 9 is used to indicate the opening and closing status of the circuit breaker 1; the other end of the first shaft 5 is connected to the connecting rod 7.

[0032] like Figure 2 , Figure 3 As shown, when the circuit breaker is open, a first connecting piece 10 is provided on one end of the shaft 8 inside the circuit breaker 1. The first connecting piece 10 has a U-shaped notch 12, and the first shaft 5 is placed on the U-shaped notch 12. A second connecting piece 11 is provided on one end of the connecting rod 7 inside the circuit breaker 1. The first connecting piece 10 and the second connecting piece 11 are the same. One end of the first shaft 5 is placed on the U-shaped notch 12 of the first connecting piece 10, and the other end is placed on the U-shaped notch 12 of the second connecting piece 11. The middle part passes through the circuit breaker operating main shaft 2 and is perpendicular to the circuit breaker operating main shaft 2. When the circuit breaker is in the open or closed state, the circuit breaker operating main shaft 2 moves horizontally, thereby driving the first shaft 5 to move horizontally in parallel, thus rotating the open shaft 8 and the connecting rod 7 at both ends.

[0033] like Figure 3 , Figure 4As shown, the connecting rod 7 is located at one end of the disconnecting switch 3 and is hinged to one end of the second shaft 6 by a screw. The second shaft 6 is divided into two sections, which are connected by another screw. One end of the second shaft 6 passes through the end baffle of the disconnecting switch 3 and cooperates with the baffle 13 on the disconnecting switch operating shaft 4. The second shaft 6 and the disconnecting switch operating shaft 4 are parallel to each other. The end of the second shaft 6 that passes through the baffle extends out from the outer end of the baffle. The disconnecting switch operating shaft 4 also passes through this baffle and extends out to the outer wall. The baffle 13 is sleeved on the outer disconnecting switch operating shaft 4. The baffle 13 is long and has a hook at the end. The second shaft 6 moves horizontally with the rotation of the connecting rod 7 to realize the switching between the first working position and the second working position.

[0034] In the first working position, the end of the second shaft 6 located outside the baffle plate contacts the hook on the baffle plate 13, thereby restricting the rotation of the disconnecting switch operating shaft 4. In the second working position, this end disengages from the baffle plate 13, allowing the disconnecting switch 3 to rotate. A sleeve 14 is also provided on the baffle plate at the end of the disconnecting switch 3, through which the second shaft 6 passes to prevent it from disengaging from the baffle plate during movement. The second shaft 6 rotates via the connecting rod 7, thereby extending and retracting on the sleeve 14. When extended, it contacts the baffle plate 13; when retracted, it does not contact the baffle plate 13.

[0035] An operating handle 15 is connected to one end of the disconnector operating shaft 4 located outside the baffle. The operator operates the disconnector 3 by rotating the operating handle 15.

[0036] In operation, the circuit breaker operating spindle 2 drives the end operating mechanism to close the circuit, causing the first shaft 5 to translate to the left. When the circuit is open, the shaft 8 drives the pointer plate 9 to point to the closed state. The connecting rod 7 drives the second shaft 6 to move to the right. The end of the second shaft 6 located outside the baffle extends onto the baffle plate 13, restricting the rotation of the disconnecting switch 3 operating shaft. The disconnecting switch operating shaft 4 cannot be rotated. When the circuit breaker operating spindle 2 drives the end operating mechanism to disconnect the circuit, the circuit breaker operating spindle 2 drives the first shaft 5 to translate to the right, and then drives the opening shaft 8 and connecting rod 7 at both ends to rotate. The opening shaft 8 drives the outer pointer plate 9 to point to the open state. The connecting rod 7 drives the second shaft 6 to move to the left. The end of the second shaft 6 located outside the baffle retracts into the sleeve 14, not contacting the baffle plate 13, and the disconnecting switch operating shaft 4 can be driven.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An interlocking device between a circuit breaker and a disconnecting switch, characterized in that, It includes a first axis connected to the main shaft of the circuit breaker operation and a second axis connected to the operating shaft of the disconnector switch. The first axis and the second axis are connected by a connecting rod, and the second axis has a first working position and a second working position. When the circuit breaker is in the closed state, the second shaft is in the first working position, and the disconnecting switch operating shaft is locked. When the circuit breaker is in the open state, the second shaft is in the second working position, and the disconnecting switch operating shaft is unlocked.

2. The interlocking device between the circuit breaker and the disconnecting switch according to claim 1, characterized in that, One end of the first shaft is connected to the tripping shaft on the circuit breaker, the other end is connected to the connecting rod, and the middle part is connected to the main operating shaft of the circuit breaker. The first shaft is arranged perpendicular to the main operating shaft of the circuit breaker.

3. The interlocking device between the circuit breaker and the disconnecting switch according to claim 2, characterized in that, When the circuit breaker is tripped, one end of the shaft is connected to a pointer plate, which is used to indicate the status of the circuit breaker. The other end is connected to a first connecting piece, one end of which has a U-shaped notch, and one end of the first shaft is located on the U-shaped notch.

4. The interlocking device between the circuit breaker and the disconnecting switch according to claim 1, characterized in that, One end of the second shaft is hinged to the connecting rod, and the other end engages with a baffle on the operating shaft of the disconnect switch. The baffle is sleeved on the operating shaft of the disconnect switch. When the second shaft is in the first working position, the second shaft is positioned on the baffle, thereby restricting the rotation of the operating shaft of the disconnect switch. When the second shaft is in the second working position, the second shaft disengages from the baffle.

5. The interlocking device between the circuit breaker and the disconnecting switch according to claim 4, characterized in that, The second shaft includes a first section and a second section, the first section and the second section are connected by a screw, and the other end of the second section passes through the baffle of the disconnecting switch and cooperates with the baffle plate.

6. The interlocking device between the circuit breaker and the disconnecting switch according to claim 5, characterized in that, The baffle is provided with a sleeve, and the second section is provided through the sleeve.

7. The interlocking device between the circuit breaker and the disconnecting switch according to claim 1, characterized in that, The connecting rod is provided with a second connecting piece at one end connected to the first shaft. One end of the second connecting piece is connected to the connecting rod, and the other end is provided with a U-shaped notch. The first shaft is disposed on the U-shaped notch.

8. The interlocking device between the circuit breaker and the disconnecting switch according to claim 1, characterized in that, The operating shaft of the disconnect switch is provided with an operating handle at its end.

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