Medium-voltage circuit breaker handcart execution unit box with locking mechanism

Abstract

The utility model discloses a medium-voltage circuit breaker handcart execution unit box with a locking mechanism, which is used on an electric execution mechanism of a medium-voltage circuit breaker handcart and comprises a box body, an execution mechanism and the locking mechanism. The box body is provided with a box door; the executing mechanism comprises a motor and a driving assembly, and the driving assembly is provided with a manual connecting part; the locking mechanism comprises a baffle assembly, a buckling block and a travel switch assembly. According to the utility model, the manual connection part is used for being connected with an external crank to realize manual operation, and the external hanging mechanism of the medium-voltage circuit breaker handcart can be ensured to be normally used in combination with electric driving realized by the motor; the baffle assembly is arranged and used for controlling the travel switch assembly to conduct electrical action and controlling the manual connecting part to conduct closing or opening action. Through the cooperation of the clamping groove and the clamping block, an execution mechanism for opening the box door for misoperation is prevented from violating five-prevention, and the use safety is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of handcart execution unit mechanism components, specifically to a medium-voltage circuit breaker handcart execution unit box with a locking mechanism. Background Technology

[0002] Currently, the maintenance procedure for 10kV medium-voltage switchgear circuit breakers in the power grid is as follows: the circuit breaker opening and closing can be remotely controlled by the control center. Access to the switchgear requires the circuit breaker to be de-energized, and then operators must manually move it from the operating position to the test position using a crank handle in the switch room. The switchgear circuit breaker is then moved out of the switchgear using a service trolley. In this process, the service trolley plays a crucial role. Operators need to adjust the overall height and stability of the service trolley according to the height of the circuit breaker. The external drive mechanism then transports and moves the medium-voltage circuit breaker. The actuator unit box of the external drive mechanism is the main driving mechanism, used to move the platform of the medium-voltage circuit breaker. However, the existing actuator unit box has the following problems: the box door is locked with a knob lock. When the internal mechanism is not stopped, the actuator is in motion. When operators open the box door to inspect the internal actuator, the running drive shaft may cause accidental injury to the operators, resulting in poor safety. Utility Model Content

[0003] This utility model addresses the shortcomings of current technology by providing a medium-voltage circuit breaker trolley execution unit box with a locking mechanism, aiming to solve the technical problem of poor operational safety in existing execution unit boxes.

[0004] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0005] A medium-voltage circuit breaker trolley actuator box with a locking mechanism is used on the electric actuator of a medium-voltage circuit breaker trolley. The medium-voltage circuit breaker trolley actuator box with locking mechanism includes a box body, an actuator, and a locking mechanism. The box body is provided with a door, the actuator is located inside the box body, and the locking mechanism is disposed between the door and the box body. The actuator includes a motor and a drive assembly, and the drive assembly is provided with a manual connection part.

[0006] As a further improvement, the locking mechanism includes a baffle assembly, a buckle block, and a limit switch assembly; the baffle assembly and the limit switch assembly are disposed inside the door, and the buckle block is disposed inside the enclosure.

[0007] As a further improvement, the box door is provided with a through hole, and the baffle assembly includes a fixed plate and a sliding plate. The fixed plate is disposed on the inner surface of the box door, and a sliding groove is provided between the fixed plate and the box door. The sliding plate is disposed in the sliding groove, and the sliding plate can move along the direction of the sliding groove.

[0008] As a further improvement, the fixing plate is provided with a first through hole concentric with the through hole and a guide groove; the sliding plate is provided with a sealing part and a second through hole, the second through hole being located on the side of the sealing part, and the second through hole being used to coincide with the first through hole and the first through hole when opened.

[0009] As a further improvement, the fixing plate is provided with a mounting block, and the limit switch assembly is disposed on the mounting block. The limit switch assembly includes a limit switch and a trigger rod. The limit switch is electrically connected to the motor, and the trigger rod is connected to the limit switch. The trigger rod is disposed below the mounting block and is provided with a guide wheel. The slide plate is also provided with a guide block. The guide block is provided with an inclined portion. The guide block is used to contact the guide wheel when the sealing portion blocks the through hole, thereby triggering the limit switch to act and generating an electrical on / off signal, so that the motor forms a lock-in circuit and is in the running state.

[0010] As a further improvement, the guide block and the slide plate are provided with a slot, which is used to engage with the buckle block when the sealing part blocks the through hole.

[0011] As a further improvement, a rectangular guard plate is provided on the outside of the through hole, the rectangular guard plate is provided with a locking block, the slide plate is provided with an operating part, and both the operating part and the locking block are provided with locking holes, which are used for the locking function of the five-proof lock.

[0012] As a further improvement, a hinge assembly and a knob lock assembly are provided between the door and the body; the hinge assembly includes multiple hinge louvers; the knob lock assembly includes a torsion lock and a locking block.

[0013] As a further improvement, the manual connection part is a polygonal prism structure, and the center of the manual connection part and the center of the through hole are on the same concentric axis.

[0014] As a further improvement, the drive assembly includes a worm gearbox, and the drive assembly is provided with an output shaft that extends to the outside of the housing.

[0015] Compared with the prior art, the above-mentioned one or more technical solutions in the medium-voltage circuit breaker trolley execution unit box with locking mechanism provided by the present invention have at least one of the following technical effects:

[0016] This utility model enables manual operation by setting a manual connection part for connection with an external crank handle, ensuring the normal use of the external mechanism of the medium-voltage circuit breaker trolley and the normal operation of the work. Combined with the actuator composed of a motor, it enables electric drive, thereby realizing manual or electric operation, increasing the operation drive method and ensuring the normal use of the actuator box.

[0017] The baffle assembly is used to control the limit switch assembly to perform electrical actions, as well as the closing or opening action of the manual connection part; the actuator is designed to prevent accidental operation by opening the box door in violation of the "five preventions" by setting up a slot and a block, thereby improving the safety of use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the medium-voltage circuit breaker trolley execution unit box with a locking mechanism in this embodiment;

[0020] Figure 2 This is a front view of the medium-voltage circuit breaker trolley execution unit box with a locking mechanism in this embodiment;

[0021] Figure 3 This is a top view of the medium-voltage circuit breaker trolley execution unit box with a locking mechanism in this embodiment. Detailed Implementation

[0022] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0023] For examples, see the appendix. Figures 1-3 A medium-voltage circuit breaker trolley actuator box 1 with a locking mechanism is used on the electric actuator of a medium-voltage circuit breaker trolley. The medium-voltage circuit breaker trolley actuator box 1 with locking mechanism includes a box body 2, an actuator 3 and a locking mechanism 4; the box body 2 is provided with a box door 5, the actuator 3 is inside the box body 2, and the locking mechanism 4 is disposed between the box door 5 and the box body 2; the actuator 3 includes a motor 30 and a drive assembly 31, the drive assembly 31 is provided with a manual connection part 6; the motor 30 is a DC motor.

[0024] The locking mechanism 4 includes a baffle assembly 40, a buckle 41, and a limit switch assembly 42; the baffle assembly 40 and the limit switch assembly 42 are disposed inside the door 5, and the buckle 41 is disposed inside the housing 2.

[0025] The door 5 is provided with a through hole 50. The baffle assembly 40 includes a fixing plate 400 and a sliding plate 401. The fixing plate 400 is disposed on the inner surface of the door 5. A sliding groove is provided between the fixing plate 400 and the door 5. The sliding plate 401 is disposed in the sliding groove and can move along the direction of the sliding groove.

[0026] The fixing plate 400 is provided with a first through hole 402 concentric with the through hole 50 and a guide groove 403; the sliding plate 401 is provided with a sealing part 404 and a second through hole 405. The second through hole 405 is located on the side of the sealing part 404. The second through hole 405 is used to coincide with the through hole 50 and the first through hole 402 when opened. The baffle assembly 40 is used to control the limit switch assembly 42 to perform electrical actions and the closing or opening action of the manual connection part 6, so as to avoid the actuator 3 of opening the box door 5 in violation of the "five preventions" and thus improve the safety of use.

[0027] The fixed plate 400 is provided with a mounting block, and the limit switch assembly 42 is disposed on the mounting block. The limit switch assembly 42 includes a limit switch 420 and a trigger rod 421. The limit switch 420 is electrically connected to the motor 30 via a wire connection. The trigger rod 421 is connected to the limit switch 420 and is disposed below the mounting block. The trigger rod 421 is provided with a guide wheel 422. The slide plate 401 is also provided with a guide block 406. The guide block 406 has an inclined portion for guiding purposes. When the sealing part 404 blocks the through hole 50, it contacts the guide wheel 422, thereby triggering the limit switch 420 to operate and generate an electrical on / off signal, so that the motor 30 forms a lock-in circuit and is in the running state; when the through hole 402 of the baffle coincides with the through hole 50, the guide block 406 disengages from the trigger rod 421, the limit switch 420 generates an electrical off signal, so that the motor 30 forms a lock-in circuit disconnected and is in the closed state, and the motor 30 stops operating. The limit switch 420 assembly 42 is used to avoid accidental injury caused by interference between electric and manual operation, and improve safety.

[0028] The guide block 406 and the slide plate 401 are provided with a slot 407. The slot 407 is provided with an insertion port. The slot 407 is used to engage with the buckle block 41 when the sealing part 404 blocks the through hole 50, thereby preventing the box door 5 from being opened when the medium voltage circuit breaker trolley execution unit box 1 with the locking mechanism 4 is in use, thus improving the safety of use.

[0029] A rectangular guard plate is provided on the outside of the through hole 50. The rectangular guard plate is provided with a locking block. The sliding plate 401 is provided with an operating part. Both the operating part and the locking block are provided with locking holes. The locking holes are used for the locking function of the five-proof lock, thereby creating an interlocking relationship with the "five-proof" system of the substation electrical equipment. The operating part is used for the opening or closing action of the baffle, thereby allowing for manual operation or electric operation by the motor 30 as needed. The locking block and the five-proof lock are used to improve protection.

[0030] A hinge assembly 7 and a knob lock assembly 8 are also provided between the door 5 and the body 2; the hinge assembly 7 includes multiple hinge louvers; the knob lock assembly 8 includes a torsion lock and a locking block.

[0031] The manual connection part 6 has a polygonal prism structure, and the center of the manual connection part 6 and the center of the through hole 50 are on the same axis. The manual connection part 6 is used to insert and connect the crank when the motor 30 malfunctions or manual operation is required, providing manual operation function.

[0032] The drive assembly 31 includes a worm gear box, which includes a worm gear rod and multiple linkage gears. The drive assembly 31 is provided with an output shaft 310, which extends to the outside of the housing 2.

[0033] This utility model enables manual operation by setting a manual connection part for connection with an external crank handle, ensuring the normal use of the external mechanism of the medium-voltage circuit breaker trolley and the normal operation of the work. Combined with the actuator composed of a motor, it enables electric drive, thereby realizing manual or electric operation, increasing the operation drive method and ensuring the normal use of the actuator box.

[0034] The baffle assembly is used to control the limit switch assembly to perform electrical actions, as well as the closing or opening action of the manual connection part; the actuator is designed to prevent accidental operation by opening the box door in violation of the "five preventions" by setting up a slot and a block, thereby improving the safety of use.

[0035] This utility model is not limited to the above-described embodiments. Other execution unit boxes for medium-voltage circuit breaker trolleys with locking mechanisms obtained by using the same or similar structures or devices as the above-described embodiments of this utility model are all within the protection scope of this utility model.

Claims

1. A medium-voltage circuit breaker trolley actuator unit box with a locking mechanism, used on the electric actuator of a medium-voltage circuit breaker trolley, characterized in that: The medium-voltage circuit breaker trolley execution unit box with locking mechanism includes a box body, an execution mechanism and a locking mechanism; the box body is provided with a box door, the execution mechanism is located inside the box body, and the locking mechanism is located between the box door and the box body; the execution mechanism includes a motor and a drive assembly, and the drive assembly is provided with a manual connection part.

2. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 1, characterized in that: The locking mechanism includes a baffle assembly, a buckle block, and a limit switch assembly; the baffle assembly and the limit switch assembly are disposed inside the door, and the buckle block is disposed inside the box.

3. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 2, characterized in that: The box door has a through hole, and the baffle assembly includes a fixed plate and a sliding plate. The fixed plate is disposed on the inner surface of the box door, and a sliding groove is provided between the fixed plate and the box door. The sliding plate is disposed in the sliding groove and can move along the direction of the sliding groove.

4. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 3, characterized in that: The fixing plate is provided with a first through hole concentric with the through hole and a guide groove; the sliding plate is provided with a sealing part and a second through hole, the second through hole being located on the side of the sealing part, and the second through hole being used to coincide with the first through hole and the first through hole when opened.

5. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 4, characterized in that: The fixed plate is provided with a mounting block, and the limit switch assembly is disposed on the mounting block. The limit switch assembly includes a limit switch and a trigger rod. The limit switch is electrically connected to the motor, and the trigger rod is connected to the limit switch. The trigger rod is disposed below the mounting block and is provided with a guide wheel. The slide plate is also provided with a guide block. The guide block is provided with an inclined portion. The guide block is used to contact the guide wheel when the sealing portion blocks the through hole, thereby triggering the limit switch to act and generating an electrical on / off signal, so that the motor forms a lock-in circuit and is in the running state.

6. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 5, characterized in that: The guide block and the slide plate are provided with a slot, which is used to engage with the buckle block when the sealing part blocks the through hole.

7. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 6, characterized in that: A rectangular guard plate is provided on the outside of the through hole, and a locking block is provided on the rectangular guard plate. The sliding plate is provided with an operating part, and both the operating part and the locking block are provided with locking holes; the locking holes are used for the function of a five-proof lock buckle.

8. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 7, characterized in that: A hinge assembly and a knob lock assembly are also provided between the door and the body of the box; the hinge assembly includes multiple hinge louvers; the knob lock assembly includes a torsion lock and a locking block.

9. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 8, characterized in that: The manual connection part has a polygonal prism structure, and the center of the manual connection part and the center of the through hole are on the same concentric axis.

10. The medium-voltage circuit breaker trolley execution unit box with a locking mechanism according to claim 9, characterized in that: The drive assembly includes a worm gearbox, and the drive assembly has an output shaft that extends to the outside of the housing.

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