Five-prevention electrical interlock of circuit breaker

Abstract

The utility model discloses a breaker five-prevention electrical interlock, comprising a mounting rack arranged on a breaker handcart, the mounting rack is provided with a grounding spring bolt and a microswitch used for controlling on-off of a handcart electric operation propulsion mechanism, and the microswitch is fixedly connected with the mounting rack. An extension position and a retraction position which are used for locking and unlocking the closing action of the grounding switch are respectively arranged in the action stroke of the grounding spring bolt, the grounding spring bolt disconnects the microswitch under the extension position, and the grounding spring bolt triggers the microswitch under the retraction position. According to the utility model, the interlocking structure of the grounding spring bolt, the slide block support and the microswitch is adopted, and through a set of linked interlocking structure, the electrical five-prevention requirements of a manual operation mechanism and an electric operation mechanism are simultaneously met, the structural complexity in the cabinet is effectively simplified, and the maintenance difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the switchgear equipment technical field relates to a circuit breaker five prevent electrical interlock. BACKGROUND

[0002] According to the electrical five prevention requirement of switchgear, the trolley in switch cabinet is strictly forbidden to close grounding switch when in working position, and it is strictly forbidden to shake trolley into working position when grounding switch is closed.

[0003] The traditional switch cabinet is usually provided with interlocking mechanism matched with the action mechanism of manual operation trolley to control the safe closing and opening of trolley and grounding switch, and the newly emerging switch cabinet equipment is provided with manual operation mechanism and electric operation mechanism at the same time, however, the traditional interlocking mechanism is only matched with manual operation mechanism, and cannot provide electrical five prevention for the newly added electric operation mechanism, so that the electric operation mechanism needs to be additionally provided with interlocking, which increases the complexity of equipment in switch cabinet and the difficulty of maintenance. UTILITY MODEL CONTENTS

[0004] The utility model discloses in order to overcome the insufficient of prior art, provide a circuit breaker five prevent electrical interlock.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A circuit breaker five prevent electrical interlock, including the mounting bracket set up in the circuit breaker trolley, the mounting bracket is provided with the ground lock tongue and the microswitch for controlling the on-off of trolley electric operation push mechanism, the microswitch with The mounting bracket is fixedly connected, the action stroke of ground lock tongue is provided with the extension position and the retraction position for locking and unlocking the closing action of grounding switch respectively, under the extension position, the ground lock tongue disconnects the microswitch, under the retraction position, the ground lock tongue triggers the microswitch.

[0007] Further, the mounting bracket is provided with a spring, and the two ends of the spring are connected with the ground lock tongue and the mounting bracket respectively.

[0008] Further, the ground lock tongue is further provided with a slope for abutting against the grounding switch, and the slope forms a force towards the retraction position on the ground lock tongue when abutting against the grounding switch.

[0009] Further, one end of the ground lock tongue is provided with a sliding block support, and the sliding block support forms a contact surface for triggering the microswitch.

[0010] Further, the circuit breaker handcart has a test position and a working position in the switch cabinet, the grounding lock tongue is provided with a lever, and the switch cabinet is provided with a limiting piece for locking the lever in the working position.

[0011] In summary, the utility model has the advantages of:

[0012] The utility model discloses an interlocking structure of grounding lock tongue, sliding block support and micro switch, which meets the electrical five-proof requirements of manual operating mechanism and electric operating mechanism through a set of interlocking structure, effectively simplifies the complexity of the structure in the cabinet and reduces the maintenance difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the electrical interlocking and the circuit breaker handcart part of the utility model.

[0014] Figure 2 It is a structure schematic view of the grounding lock tongue in the electrical interlocking.

[0015] Figure 3 It is Figure 2 It is a structure schematic view of the grounding lock tongue in the electrical interlocking.

[0016] Figure 4 It is a structure schematic view of the grounding lock tongue in the electrical interlocking.

[0017] Figure 5 It is Figure 4 It is a structure schematic view of the grounding lock tongue in the electrical interlocking.

[0018] In the drawing, 1 is a mounting frame, 11 is a grounding lock tongue, 111 is an inclined surface, 12 is a lever, 13 is a sliding block support, 14 is a micro switch, and 2 is a handcart. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are described below through specific examples, and the person skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The utility model can also be implemented or applied through different specific embodiments, and the details in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0020] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the utility model in a schematic manner, and only show the components related to the utility model in the diagrams, not drawn according to the number, shape and size of the components in actual implementation, the type, number and proportion of each component in actual implementation can be changed arbitrarily, and the component layout type can also be more complex.

[0021] All directional indications (such as up, down, left, right, front, back, transverse, longitudinal,...) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, if the specific posture changes, the directional indications will also change accordingly.

[0022] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0023] The utility model provides a circuit breaker five prevent electrical interlock, set up in the circuit breaker handcart 2, refer to Figure 1 , for the electrical five prevention of the circuit breaker handcart 2 in the test position and the working position in the switchgear cabinet.

[0024] The circuit breaker five prevent electrical interlock includes mounting bracket 1, lever 12, grounding lock tongue 11, slider bracket 13 and micro switch 14, the mounting bracket 1 is fixedly arranged on the circuit breaker handcart 2, the lever 12, the grounding lock tongue 11, the slider bracket 13 and the micro switch 14 are all arranged on the mounting bracket 1.

[0025] The circuit breaker handcart 2 has a set position in the process of rocking in and out in the switch cabinet, including test position and working position, the rocking action of the circuit breaker handcart 2 drive includes manual drive and electric drive, and an electric operation advancing mechanism is arranged to realize electric drive.

[0026] The electrical five prevention requirements: the circuit breaker handcart 2 cannot operate the grounding switch closing in the working position; when the grounding switch is closed, the handcart 2 cannot rock in or the electric operation advancing mechanism cannot work.

[0027] To adapt to the above-mentioned electrical five prevention requirements, one end of the mounting bracket 1 is provided with a through hole for the grounding lock tongue 11 to pass through, the grounding lock tongue 11 extends out of the mounting bracket 1 or retracts into the mounting bracket 1 along the through hole, when the grounding lock tongue 11 extends out of the mounting bracket 1, it is located on the path of the grounding switch closing action, thereby forming a barrier to the grounding switch, preventing the grounding switch from closing, when the grounding lock tongue 11 retracts into the mounting bracket 1, the grounding switch can be arbitrarily operated to close or open.

[0028] A spring may be installed inside the mounting bracket 1. The spring is connected to the grounding latch 11. The two ends of the spring are respectively connected to the grounding latch 11 and the inner wall of the mounting bracket 1, thereby forming an outward elastic force on the grounding latch 11, so that the grounding latch 11 is maintained in the position of extending out of the mounting bracket 1 when it is not subjected to other external forces.

[0029] The grounding latch 11 has an inclined surface 111 at the end facing the grounding switch. When the grounding latch 11 is extended, it abuts against the inclined surface 111 during the closing action stroke of the grounding switch, generating a force that pushes the grounding latch 11 in the retraction direction, so that the grounding switch can close after the grounding latch 11 retracts.

[0030] The mounting bracket 1 is also provided with a sliding groove, which is oriented along the extension and retraction direction of the grounding latch 11. The lever 12 passes through the sliding groove, and one end of the lever 12 is fixedly connected to the grounding latch 11. The extension and retraction of the grounding latch 11 synchronously drives the lever 12 to slide along the sliding groove. In the test position, the lever 12 is not restricted, and the grounding latch 11 and the lever 12 can extend and retract. A limit component is provided in the switch cabinet. In the working position, the limit component abuts against the lever 12, restricting the movement of the lever 12, keeping the grounding latch 11 in the extended state and unable to retract. As a result, the grounding switch is blocked and cannot be closed, thus meeting the five protection requirements.

[0031] The slider bracket 13 is disposed inside the mounting frame 1 and is connected to the end of the grounding latch 11 located inside the mounting frame 1. The extension and retraction of the grounding latch 11 synchronously drives the slider bracket 13 to move. The micro switch 14 is disposed on the mounting frame 1 near the slider bracket 13. The micro switch 14 is electrically connected to the electric operating propulsion mechanism and is used to control the on and off of the electric operating propulsion mechanism. The slider bracket 13 is provided with an inclined contact surface to more accurately trigger the contacts of the micro switch 14.

[0032] Reference Figure 2 and Figure 3 When the grounding latch 11 is in the extended position, the slider bracket 13 is away from the micro switch 14 and does not contact the micro switch 14. At this time, the micro switch 14 is normally closed, the electric operation propulsion mechanism is open, and the circuit breaker trolley 2 can be driven to move in and out.

[0033] Reference Figure 4 and Figure 5 When the grounding switch is closed, causing the grounding latch 11 to retract to the lower position, the slider bracket 13 approaches and abuts against the micro switch 14, triggering the micro switch 14 to open. At this time, the electric operating propulsion mechanism is cut off, and the circuit breaker trolley 2 cannot be driven to advance, thus meeting the five protection requirements.

[0034] Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

Claims

1. A circuit breaker five-prevention electrical interlock, characterized in that, The application relates to a mounting rack (1) arranged on a circuit breaker trolley (2), wherein a grounding lock tongue (11) and a micro switch (14) for controlling the on-off of an electrically-operated pushing mechanism of the trolley (2) are arranged on the mounting rack (1), the micro switch (14) is fixedly connected with the mounting rack (1), and the grounding lock tongue (11) is respectively provided with an extended position and a retracted position for locking and unlocking the closing action of a grounding switch in the action stroke of the grounding lock tongue (11), the grounding lock tongue (11) disconnects the micro switch (14) in the extended position, and the grounding lock tongue (11) triggers the micro switch (14) in the retracted position.

2. The circuit breaker five-prevention electrical interlock according to claim 1, characterized in that, A spring is arranged in the mounting rack (1), two ends of the spring are respectively connected with the grounding lock tongue (11) and the mounting rack (1), and the spring provides elastic force for maintaining the grounding lock tongue (11) in the extended position.

3. The circuit breaker five-proof electrical interlock according to claim 2, wherein, The grounding lock tongue (11) is further provided with an inclined surface (111) for abutting against the grounding switch, and the inclined surface (111) forms an action force on the grounding lock tongue (11) towards the retracted position when abutting against the grounding switch.

4. The circuit breaker five-proof electrical interlock according to claim 1, wherein, One end of the grounding lock tongue (11) is provided with a sliding block support (13), and the sliding block support (13) is formed with a contact surface for triggering the micro switch (14).

5. The electrical interlock for a circuit breaker according to any one of claims 1-3, wherein, The circuit breaker trolley (2) has a test position and a working position relative to a switch cabinet, the grounding lock tongue (11) is provided with a lever (12), and the switch cabinet is provided with a limiting piece for locking the action of the lever (12) in the working position.

Images