Structure for locking manual and electric closing operation of circuit breaker during opening of isolating switch

Abstract

The utility model relates to a structure for locking manual and electric closing operation of a circuit breaker during opening of an isolating switch, which comprises a circuit breaker shell, an operating mechanism and an isolating switch assembly, the operating mechanism is mounted in the circuit breaker shell, the isolating switch assembly is mounted on one side of the circuit breaker shell, and the isolating switch assembly is mounted on the other side of the circuit breaker shell. The locking end of the disconnecting switch assembly is arranged on the circuit breaker shell and abuts against the operating mechanism in a limiting mode. According to the structure for locking the manual and electric closing operation of the circuit breaker during opening of the isolating switch, when closing is needed after maintenance is completed, the main shaft of the isolating switch needs to be rotated to enable the locking crank arm to swing so as to push the locking rod to compress the elastic piece to move towards the interior of the circuit breaker shell, so that the locking plate and the mechanism action limiting plate are staggered; the operating mechanism can be operated without being limited, so that the operating mechanism can be operated only by rotating the main shaft of the disconnecting switch, the operation steps are ensured to be correct, and faults are prevented.

Description

Technical Field

[0001] This utility model belongs to the field of disconnecting switch technology, specifically relating to a structure that blocks the manual and electric closing operations of the circuit breaker when the disconnecting switch is opened. Background Technology

[0002] In recent years, with the continuous development of the power industry, a large number of electrical equipment has been put into the power grid. The inspection and maintenance of electrical equipment has become an issue that cannot be ignored. Among them, the inspection and maintenance of disconnecting switches takes up a lot of time.

[0003] When performing maintenance on a disconnect switch, it must be shut down. When restarting the disconnect switch after maintenance, it must be done according to the specified steps to prevent problems from occurring during the restart process. Because the maintenance personnel have been working for a long time, they may inevitably make mistakes in the restart procedure, which could cause damage. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a structure that blocks the manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, which can ensure that the operator performs the operation steps correctly.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a structure that locks the manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, including a circuit breaker housing, an operating mechanism and a disconnecting switch assembly. The operating mechanism is installed inside the circuit breaker housing, the disconnecting switch assembly is installed on one side of the circuit breaker housing, and the locking end of the disconnecting switch assembly is positioned at the limit of the circuit breaker housing and the operating mechanism.

[0006] The disconnector switch assembly includes a bracket, a disconnector switch main shaft, a locking crank arm, and a locking rod. The bracket is mounted on the circuit breaker housing. The disconnector switch main shaft is rotatably mounted on the bracket. The locking crank arm is mounted on the disconnector switch main shaft. The locking rod is slidably mounted on the side wall of the circuit breaker housing. The locking rod has a locking plate at one end that slides inside the circuit breaker housing. The operating mechanism has a mechanism action limiting plate that fits against the locking plate. The locking rod has an elastic element that abuts against the circuit breaker housing.

[0007] The circuit breaker housing is provided with a locking guide sleeve for guiding the locking rod, and the elastic element is located inside the locking guide sleeve.

[0008] The locking rod is equipped with a limiting plate, which is located inside the circuit breaker housing.

[0009] One end of the main shaft of the disconnect switch is equipped with a disconnect switch opening and closing operation handle.

[0010] An installation plate is installed inside the circuit breaker housing, and a limit switch is installed on the installation plate. A stop block is provided on the side of the locking plate facing the limit switch.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This utility model relates to a structure that interlocks the manual and electric closing operations of the circuit breaker when the disconnecting switch is opened. After maintenance, when closing the circuit breaker, the main shaft of the disconnecting switch needs to be rotated, causing the locking crank arm to swing and push the locking rod compression elastic element to move into the circuit breaker housing. This causes the locking plate to misalign with the mechanism action limiting plate, allowing the operating mechanism to operate without restriction. Therefore, the main shaft of the disconnecting switch must be rotated before the operating mechanism can be operated, ensuring the correct operating procedure and preventing malfunctions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the disconnecting switch in the open state of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the disconnector switch in the closed state of this utility model;

[0015] Figure 3 This is a top view of the disconnector switch in the open state of this utility model.

[0016] Figure 4 This is a top view of the disconnector switch in the closed state of this utility model.

[0017] Figure 5 This is an enlarged structural schematic diagram of the abutment block of this utility model.

[0018] The markings in the diagram are: 1. Circuit breaker housing; 2. Operating mechanism; 3. Bracket; 4. Disconnect switch spindle; 5. Locking crank arm; 6. Locking rod; 7. Locking plate; 8. Mechanism movement limiting plate; 9. Elastic element; 10. Locking guide sleeve; 11. Limit plate; 12. Disconnect switch opening and closing operating handle; 13. Mounting plate; 14. Limit switch; 15. Abutment block. Detailed Implementation

[0019] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0020] like Figures 1-5 As shown, this embodiment provides a structure for locking the manual and electric closing operations of the circuit breaker when the disconnecting switch is opened. It includes a circuit breaker housing 1, an operating mechanism 2, and a disconnecting switch assembly. The operating mechanism 2 is installed inside the circuit breaker housing 1, and the disconnecting switch assembly is installed on one side of the circuit breaker housing 1. The locking end of the disconnecting switch assembly is positioned at the abutment limit between the circuit breaker housing 1 and the operating mechanism 2.

[0021] The disconnector switch assembly includes a bracket 3, a disconnector switch main shaft 4, a locking crank arm 5, and a locking rod 6. The bracket 3 is mounted on the circuit breaker housing 1. The disconnector switch main shaft 4 is rotatably mounted on the bracket 3. A knife switch (not shown in the attached drawings) is mounted on the disconnector switch main shaft 4. The locking crank arm 5 is mounted on the disconnector switch main shaft 4. The locking rod 6 is slidably mounted on the side wall of the circuit breaker housing 1. The locking crank arm and the locking rod 6 are located on the same output horizontal plane. The inner end of the locking rod 6, which slides within the circuit breaker housing 1, is provided with a locking plate 7. The operating mechanism 2 is provided with a mechanism action limiting plate 8 that fits against the locking plate 7. The locking rod 6 is provided with an elastic element 9 that abuts against the circuit breaker housing. Specifically, the circuit breaker housing 1 is provided with a locking guide sleeve 10 for guiding the locking rod 6, and the elastic element 9 is located inside the locking guide sleeve 10 to ensure smooth movement of the locking rod 6. The locking rod 6 is provided with a limiting plate 11, which is located inside the circuit breaker housing 1. To prevent the locking rod 6 from sliding out of the circuit breaker housing 1, a disconnecting switch operating handle 12 is installed at one end of the disconnecting switch main shaft 4. This facilitates driving the disconnecting switch main shaft 4 to rotate via the disconnecting switch operating handle 12. When closing the circuit after maintenance, the disconnecting switch main shaft 4 needs to be rotated to swing the locking crank arm 5, thereby pushing the locking rod 6 to compress the elastic element 9 and move it into the circuit breaker housing 1. This causes the locking plate 7 to misalign with the mechanism action limiting plate 8, allowing the operating mechanism 2 to operate without restriction. Therefore, the disconnecting switch main shaft 4 must be rotated first to close the disconnect switch before operating the operating mechanism 2 can be operated, ensuring correct operation procedures and preventing malfunctions.

[0022] Furthermore, a mounting plate 13 is installed inside the circuit breaker housing 1, and a limit switch 14 is mounted on the mounting plate 13. A stop block 15 is provided on the side of the locking plate 7 facing the limit switch 14. In the open state, the locking plate 7 is in contact with the mechanism action limiting plate 8, so that the stop block 15 abuts against the limit switch 14, causing the limit switch 14 to open to indicate that it is in the open state, and the limit switch 14 must be closed before the next operation can be performed.

[0023] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A structure that blocks the manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, characterized in that: The circuit breaker includes a circuit breaker housing, an operating mechanism, and a disconnecting switch assembly. The operating mechanism is installed inside the circuit breaker housing, and the disconnecting switch assembly is installed on one side of the circuit breaker housing. The locking end of the disconnecting switch assembly is positioned to abut against the circuit breaker housing and the operating mechanism. The disconnector switch assembly includes a bracket, a disconnector switch main shaft, a locking crank arm, and a locking rod. The bracket is mounted on the circuit breaker housing. The disconnector switch main shaft is rotatably mounted on the bracket. The locking crank arm is mounted on the disconnector switch main shaft. The locking rod is slidably mounted on the side wall of the circuit breaker housing. The locking rod has a locking plate at one end that slides inside the circuit breaker housing. The operating mechanism has a mechanism action limiting plate that fits against the locking plate. The locking rod has an elastic element that abuts against the circuit breaker housing.

2. The structure for blocking manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, as described in claim 1, is characterized in that: The circuit breaker housing is provided with a locking guide sleeve for guiding the locking rod, and the elastic element is located inside the locking guide sleeve.

3. The structure for blocking manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, as described in claim 1, is characterized in that: The locking rod is equipped with a limiting plate, which is located inside the circuit breaker housing.

4. The structure for blocking manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, as described in claim 1, is characterized in that: One end of the main shaft of the disconnect switch is equipped with a disconnect switch opening and closing operation handle.

5. The structure for blocking manual and electric closing operations of the circuit breaker when the disconnecting switch is opened, as described in claim 1, is characterized in that: An installation plate is installed inside the circuit breaker housing, and a limit switch is installed on the installation plate. A stop block is provided on the side of the locking plate facing the limit switch.

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