CN213635872U - Circuit breaker with prevent mistake combined floodgate function - Google Patents

Abstract

A circuit breaker with an anti-misoperation closing function belongs to the technical field of low voltage. Including the handle, the actuating handle carries out the divide-shut brake operation of circuit breaker, and characteristics are: the circuit breaker further comprises a limiting device, the limiting device comprises an electromagnet and a limiting piece driven by the electromagnet, when the limiting piece is located at a first position, the limiting piece is located on a motion track of the handle, and the handle is stopped from moving to a switching-on position; when the electromagnet acts to drive the limiting piece to act to the second position, the limiting piece is positioned outside the motion trail of the handle, and the handle is allowed to move to the switching-on position. The advantages are that: the circuit breaker only receives a signal capable of closing, the handle is allowed to be closed, closing of the circuit breaker is achieved, and the purpose of accurate closing operation is achieved.

Description

Circuit breaker with prevent mistake combined floodgate function

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker with prevent mistake combined floodgate function.

Background

Molded case circuit breakers are widely used in low voltage power supply and distribution systems due to their excellent protection characteristics. Moulded case circuit breaker includes the casing, and inside operating device, contact subassembly, the spare parts such as arc extinguishing system that are provided with the circuit breaker of casing still have the handle, and the handle has the operating handle part that exposes outside the casing and is located the drive part that is connected with operating device in the casing, and the handle exposes the operating handle part outside the casing through the handle hole of seting up on the casing to be convenient for operate.

The opening and closing actions of the molded case circuit breaker are carried out by pulling the handle, the opening and closing actions of the circuit breaker can be carried out in an electric operation system or a manual operation mode, and during the manual operation, an operator can drive the operating handle part of the handle to drive the operating mechanism inside the circuit breaker, so that the opening operation and closing operation of the circuit breaker and the re-buckling operation after the automatic tripping of the circuit breaker are realized.

Under the complicated power grid topological structure, the circuit breaker can be switched on only by obtaining a switching-on instruction, and in order to meet the requirement, the circuit breaker with the function of preventing the false switching-on needs to be designed, so that the occurrence of misoperation is avoided.

In view of the above-mentioned prior art, there is a need for a reasonable improvement in the structure of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit breaker with prevent mistake combined floodgate function, but it only receives combined floodgate signal, just allows to carry out combined floodgate operation to the handle, realizes the circuit breaker combined floodgate, reaches the purpose of accurate combined floodgate operation.

The utility model discloses a task is accomplished like this, a circuit breaker with prevent mistake combined floodgate function, including the handle, drive handle carries out the divide-shut brake operation of circuit breaker, the circuit breaker still includes a stop device, stop device include electro-magnet and by electro-magnet driven locating part, when the locating part is located the first position, the locating part is located the movement track of handle, backstop handle is to the motion of combined floodgate position; when the electromagnet acts to drive the limiting piece to act to the second position, the limiting piece is positioned outside the motion trail of the handle, and the handle is allowed to move to the switching-on position.

In a specific embodiment of the present invention, a driving rod is disposed between the position-limiting member and the electromagnet, one end of the driving rod is engaged with the electromagnet, and the other end is connected to the position-limiting member.

In a specific embodiment of the present invention, the driving rod and the limiting member are connected to each other through a shaft and a groove.

In a specific embodiment of the present invention, the limiting device is an internal accessory of the circuit breaker, the limiting member is composed of a limiting plate slidably disposed in a housing of the circuit breaker, the electromagnet is fixed in the housing, the driving rod is rotatably disposed in the housing, an elastic member is disposed between the driving rod and the housing, a first stop member is disposed on the housing, the driving rod keeps the trend of movement of the limiting member toward the first stop member under the action of the elastic member, and the limiting member is located at a first position abutting against the first stop member or abuts against the handle.

In a specific embodiment of the present invention, the position-limiting device is an external accessory of the circuit breaker, the position-limiting device further includes a housing fixed outside the circuit breaker and located on one side of the handle, the position-limiting member is composed of a position-limiting rod, a through hole for the position-limiting member to reciprocate is provided on the housing, the electromagnet is fixed in the housing, the driving rod is rotatably disposed in the housing, an elastic member is disposed between the driving rod and the housing, a second position-limiting member is provided on the housing, the driving rod keeps the movement trend of the position-limiting member extending out of the housing under the action of the elastic member, and when the driving rod is under the action of the elastic member and the second position-limiting member, the position-limiting member extends out of the housing at this time; when the electromagnet acts on the driving rod, the limiting piece retracts into the shell cover at the moment, and the limiting piece is located at the second position.

In a specific embodiment of the present invention, a handle follower plate is disposed between the second stopping member and the housing, the handle follower plate can follow the handle to move, and when the handle leaves the brake separating position, the handle follower plate stops the movement of the limiting member to the first position under the action of the elastic member.

In a specific embodiment of the present invention, a movement hole formed along the movement track of the handle is further disposed on the housing, the handle follower plate is hinged to the handle through a follower shaft, and the follower shaft can follow the handle to move in the movement hole.

In a specific embodiment of the present invention, the elastic member is a torsion spring, the middle portion of the elastic member is sleeved on the rotation axis of the driving rod, and the two spring legs of the elastic member respectively abut against the driving rod and the housing.

In a specific embodiment of the present invention, the elastic member is a torsion spring, the middle portion of the elastic member is sleeved on the rotation axis of the driving rod, and the two spring legs of the elastic member respectively abut against the driving rod and the shell cover.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the first technical scheme is that when the limiting part is at a first position, the limiting part is positioned on a motion path of the handle, the handle is stopped from moving to a switching-on position, and when the limiting part is at a second position, the limiting part is positioned outside a motion track of the handle, and the handle is allowed to move to the switching-on position, so that only when a switching-on signal is received, the limiting part can be actuated to move from the first position to the second position, the switching-on operation of the handle is allowed, the switching-on of the circuit breaker is realized, and the purpose of accurate switching-on operation is achieved; secondly, the structure is sensitive to response of a closable signal, so that misoperation is avoided, and safety of the circuit breaker is guaranteed.

Drawings

Fig. 1 is an external schematic view of the circuit breaker when the limiting member is located at the first position in an embodiment of the circuit breaker.

Fig. 2 is a schematic view illustrating the cooperation of the handle, the limiting member and the operation hole when the limiting member is located at the first position in an embodiment of the circuit breaker.

Fig. 3 is a schematic diagram of the circuit breaker in which the limiting member, the driving rod, and the electromagnet are located inside the circuit breaker when the limiting member is located at the first position in an embodiment of the circuit breaker.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 is a schematic diagram of the operation hole, the limiting part, the driving rod, and the electromagnet inside the circuit breaker when the limiting part is located at the second position in an embodiment of the circuit breaker.

Fig. 6 is a cross-sectional view of the operation hole, the limiting member, the driving rod, and the electromagnet inside the circuit breaker when the limiting member is located at the second position in an embodiment of the circuit breaker.

Fig. 7 is an external schematic view of the circuit breaker according to another embodiment of the present invention, when the limiting member is located at the first position.

Fig. 8 is a schematic view of an internal structure of the housing when the limiting member is located at the first position according to another embodiment of the circuit breaker of the present invention.

Fig. 9 is a schematic view of an external structure of a housing when the limiting member is located at the first position according to another embodiment of the circuit breaker of the present invention.

Fig. 10 is a sectional view B-B of fig. 9.

Fig. 11 is a schematic view of an external structure of a housing when the limiting member is located at the second position according to another embodiment of the circuit breaker of the present invention.

Fig. 12 is a cross-sectional view taken along line C-C of fig. 11.

In the figure: 1. the device comprises a shell, 11 operating holes, 12 stopping pieces I, 13 sliding tracks, 14 rotating shafts and 15 limiting walls; 100. a base, a 200. cover, a 201. small cover; 2. a handle; 3. a limiting piece, 31. a connecting shaft, 32. a flanging; 4. the driving rod, 41, the elastic piece, 411, the first spring leg, 412, the second spring leg, 42, the long groove; 5. electromagnet, 51 movable iron core, 511 ejector rod, 52 static iron core, 53 spring, 54 coil; 300. the shell cover, 301, the moving hole, 302, the through hole, 303 and the stop piece II; 6. handle follower plate, 61, follower shaft.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1 and 2, the present invention relates to a circuit breaker with a function of preventing false switching, including a housing 1, where the housing 1 generally includes a base 100 and a cover 200, and the cover 200 is covered on the base 100. The inside operating device, contact subassembly, arc extinguishing system etc. spare part that is provided with the circuit breaker of casing 1. The circuit breaker further comprises a handle 2, the handle 2 comprises an operating handle part exposed out of the casing 1 and a driving part positioned in the casing 1 and connected with an operating mechanism, and the handle 2 is exposed out of the casing 1 through an operating hole 11 formed in the cover 200.

As shown in fig. 1 and 2, an operator can drive an operating mechanism inside the circuit breaker by pulling an operating handle portion of the handle 2, so as to realize the opening operation and closing operation of the circuit breaker and the reclosing operation after the circuit breaker is automatically tripped. The handle 2 also has an opening position and an closing position with respect to the case 1 corresponding to the opening and closing states of the circuit breaker, and the handle 2 also has a releasing position and a re-releasing position with respect to the case 1. The trip position is: when a circuit breaks down, the circuit breaker automatically trips to drive the handle to reach a tripping position. The so-called rebutting position is: after the circuit breaker is tripped, if the circuit breaker needs to be switched on, the circuit breaker needs to be buckled again, the position is an unstable position and is close to a brake separating position, and after the action of buckling is finished, the handle is stabilized at the brake separating position. Therefore, the operation hole 11 is a rectangular slot, and needs to accommodate the movement of the handle 2 between the re-buckling action, the brake opening position, the releasing position and the brake closing position.

As shown in fig. 2 to 6, in order to prevent the handle 2 from erroneously performing a closing operation to cause a safety accident, the present patent proposes a limiting device, which includes a limiting member 3 and an electromagnet 5, wherein the limiting member 3 is driven by the electromagnet 5, when the limiting member 3 is located at a first position, the limiting member 3 is located on a movement track of the handle 2, and the handle 2 is stopped from moving to a closing position, and when the electromagnet 5 drives the limiting member 3 to move to a second position, the limiting member 3 is located outside the movement track of the handle 2, and the handle 2 is allowed to move to the closing position. Furthermore, a driving rod 4 can be arranged between the limiting piece 3 and the electromagnet 5, one end of the driving rod is matched with the electromagnet 5, and the other end of the driving rod is connected with the limiting piece 3. When the electromagnet 5 acts, the electromagnet 5 drives the driving rod 4 to act, and the driving rod 4 acts to drive the limiting piece 3 to move from the first position to the second position, namely to move out of the motion track of the handle 2. Further, the driving rod 4 and the limiting member 3 are connected by a shaft-slot fit, specifically, an elongated slot 42 is provided at one end of the driving rod 4, the limiting member 3 is provided with a connecting shaft 31, and the connecting shaft 31 is accommodated in the elongated slot 42.

The structure of the circuit breaker for preventing the handle 2 from being closed by mistake will be described in detail through the following embodiments.

Example 1

The stop device of this embodiment is the inside annex of circuit breaker, realizes promptly that the spare part that prevents the mistake combined floodgate function all sets up inside the circuit breaker. A small cap 201 may be separately provided on the upper portion of the cap 200 to cover the above components, but the small cap 201 may be integrally formed with the cap 200. The stopper 3 described in the present embodiment is constituted by a stopper plate slidably provided in the cap 200.

As shown in fig. 3 and 4, the inner surface of the small lid 201 in this embodiment is provided with a sliding rail 13 for guiding the movement of the limiting member 3, and in this embodiment, the sliding direction of the limiting member 3 in the sliding slot formed by the sliding rail 13 is perpendicular to the moving direction of the handle 2 in the operation hole 11.

As shown in fig. 3 to 6, the driving rod 4 tends to rotate counterclockwise under the action of the elastic member 41, when the handle 2 is at the opening position, the driving rod 4 moves counterclockwise under the action of the elastic member 41, and then drives the limiting member 3 connected thereto to move leftward, and the limiting member 3 is limited by the first stopping member 12 disposed on the cover 200. In order to ensure an effective stop, the left end of the limiting element 3 is folded with a flange 32, as shown in fig. 3 and 5, the flange 32 is used for matching with the first stop element 12. At this time, the limiting member 3 is located at the first position, namely, stops in front of the closing movement direction of the handle 2, and blocks the handle 2 from moving towards the closing position, so as to prevent the closing operation.

As shown in fig. 4, the elastic member 41 of the present embodiment is a torsion spring, the middle portion of the torsion spring is sleeved on the rotating shaft 14 of the driving rod 4, and a position close to the rotating shaft 14 in the small cover 201 is fixed with a limiting wall 15. The two spring legs of the elastic member 41 are a first spring leg 411 abutting against the driving rod 4 and a second spring leg 412 abutting against the limiting wall 15.

As shown in fig. 3, 5, and 6, the electromagnet 5 inside the circuit breaker is fixed to the stopper wall 15, and is not limited to the above-described fixing method, and may be fixed inside the small cover 201 and may interact with the driving lever 4. The electromagnet 5 comprises a movable iron core 51, a static iron core 52, a coil 54 and a spring 53 arranged between the movable iron core 51 and the static iron core 52, and referring to fig. 6, a top rod 511 is arranged at the left end of the movable iron core 51 in an extending manner and is used for interacting with the driving rod 4.

With reference to fig. 1 to fig. 6, the working process of the circuit breaker with the anti-false-closing function according to this embodiment is as follows:

as shown in fig. 3, under the action of the elastic element 41, the driving rod 4 acts on the connecting shaft 31 of the limiting element 3, the flange 32 of the limiting element 3 abuts against the first stopping element 12, at this time, the limiting element 3 is located at the first position, the limiting element 3 is located on the motion track of the handle 2, and the stopping handle 2 moves towards the closing position.

When the fault acquisition system judges that the line is normal and sends a signal capable of closing, the coil 54 of the electromagnet 5 is electrified, the movable iron core 51 is attracted to the static iron core 52 by overcoming the action of the spring 53, the ejector rod 511 pushes the driving rod 4 to overcome the action of the elastic part 41, the driving rod 4 rotates clockwise to drive the limiting part 3 to move rightwards and withdraw from the operation hole 11, the limiting part 3 reaches the second position, the limiting part 3 is positioned outside the movement track of the handle 2 to allow the handle 2 to move towards the closing position, and a user can pull the handle 2 to perform closing operation. In the process of moving the pulling handle 2 to the switching-on position, after the handle 2 leaves the switching-off position, when the handle 2 is located in the operation hole 11, the handle 2 stops the movement of the limiting part 3 to the first position under the action of the elastic part 41, even if the switching-on signal disappears, the pushing force of the electromagnet 5 is eliminated, and the limiting part 3 does not extend out of the lower part of the operation hole 11 under the action of the elastic part 41 and the driving rod 4, but abuts against the handle 2. Therefore, the handle 2 leaves the opening position, and the handle 2 can freely act between other positions except the opening position due to the anti-blocking of the handle 2 to the limiting part 3, so that the normal operation of the circuit breaker is realized. After the handle 2 is operated to the opening position, the limiting member 3 loses the anti-stopping of the handle 2, and under the action of the elastic member 41 on the driving rod 4, the limiting member 3 automatically returns to the first position, namely, is located on the movement track of the handle 2 moving towards the closing position.

According to the configuration of embodiment 1, the space between the electromagnet 5 and the stopper 3 is not limited to the above-described embodiment in which the driving operation is transmitted through the driving lever 4, and the movement of the electromagnet 5 may directly act on the stopper 3. The stability of the position-limiting element 3 in the first position is not limited to the above-mentioned mode of passing through the first stop 12, but can also be achieved by providing a stop block on the cover 200, acting on the driving rod 4. The position of the electromagnet 5 is not limited to the cover 200, and may be other positions of the base 100 or the housing 1.

Example 2

The limiting device of the embodiment is an external accessory of the circuit breaker. The limiting device is provided with a shell 300, parts for achieving the function of preventing mistaken closing are all arranged inside the shell 300, the shell 300 is fixed outside the circuit breaker and specifically located on the cover 200 and located on one side of the handle 2, as shown in fig. 7, 8, 10 and 12, the limiting part 3 is composed of a limiting rod, and the shell 300 is provided with a through hole 302 for the limiting part 3 to reciprocate and a moving hole 301 which is formed along the moving track of the handle 2. The electromagnet 5 is fixed in the housing 300, the driving rod 4 is rotatably arranged in the housing 300, the elastic member 41 is arranged between the driving rod 4 and the housing 300, and the connection mode of the electromagnet 5 and the driving rod 4 is the same as that of the embodiment 1. The elastic member 41 in this embodiment is also a torsion spring, the middle portion of the torsion spring is sleeved on the rotating shaft 14 of the driving rod 4, and a position in the casing 300 close to the rotating shaft 14 is fixed with a limiting wall 15. The two spring legs of the elastic element 41 abut against the driving rod 4 and the limiting wall 15, respectively. The shell 300 is provided with a second stop part 303, a handle follower plate 6 is arranged between the second stop part 303 and the shell 300, the handle follower plate 6 is hinged with the handle 2 through a follower shaft 61, and the follower shaft 61 can move in the motion hole 301 along with the handle 2. The driving rod 4 makes the limiting member 3 keep the motion trend of extending out of the housing 300 under the action of the elastic member 41, and when the driving rod 4 is under the action of the elastic member 41 and the second stopping member 303, the limiting member 3 is at the first position, and at this time, the limiting member 3 extends out of the housing 300; when the electromagnet 5 acts on the driving rod 4, the limiting member 3 retracts into the housing 300, and the limiting member 3 is located at the second position. The remaining components of this embodiment and their mutual connection structure are the same as those of embodiment 1.

Referring to fig. 7 to fig. 12, the working process of the circuit breaker with the anti-false-closing function according to this embodiment is as follows:

as shown in fig. 9 and 10, under the action of the elastic member 41, one end of the driving rod 4 connected to the limiting member 3 abuts against the second stopping member 303, at this time, the limiting member 3 is located at the first position, the limiting member 3 extends out of the housing 300, the limiting member 3 is located on the motion track of the handle 2, the handle 2 is stopped to move to the switching-on position, and at this time, the handle follower plate 6 is located at the left position shown in fig. 10.

When the fault acquisition system judges that the line is normal and sends a signal capable of switching on, the coil 54 of the electromagnet 5 is electrified, the movable iron core 51 overcomes the action of the spring 53 to attract the static iron core 52, the ejector rod 511 pushes the driving rod 4 to overcome the action of the elastic part 41, under the position shown in fig. 10, the driving rod 4 rotates anticlockwise to drive the limiting part 3 to move downwards, the limiting part 3 retracts into the shell cover 300, the limiting part 3 reaches the second position, referring to fig. 12, the limiting part 3 is located outside the motion track of the handle 2 to allow the handle 2 to move towards the switching-on position, and a user can pull the handle 2 to perform switching-on operation. When the handle 2 is pulled to move to the switching-on position or the handle 2 reaches the switching-on position, as shown in fig. 11 and 12, at this time, the handle 2 leaves the switching-off position, the handle follower plate 6 moves to the right side position along with the movement of the handle 2, so that the limiting member 3 is prevented from moving to the first position under the action of the elastic member 41, and even if the switching-on signal disappears at this time, the driving force of the electromagnet is eliminated, and the limiting member 3 does not extend out of the housing 300 under the action of the elastic member 41 and the driving rod 4. Therefore, the handle 2 leaves the opening position, and the handle follower plate 6 can freely move between other positions except the opening position due to the anti-stopping of the limiting member 3, so that the normal operation of the circuit breaker is realized.

Claims (9)

1. The utility model provides a circuit breaker with prevent mistake combined floodgate function, includes handle (2), and actuating handle (2) carry out the divide-shut brake operation of circuit breaker, its characterized in that: the circuit breaker further comprises a limiting device, the limiting device comprises an electromagnet (5) and a limiting piece (3) driven by the electromagnet, when the limiting piece (3) is located at a first position, the limiting piece (3) is located on a motion track of the handle (2), and the handle (2) is stopped from moving to a switching-on position; when the electromagnet (5) acts to drive the limiting piece (3) to act to the second position, the limiting piece (3) is located outside the motion track of the handle (2) and allows the handle (2) to move to the switching-on position.

2. The circuit breaker with the function of preventing false switching-on according to claim 1, wherein a driving rod (4) is arranged between the limiting member (3) and the electromagnet (5), one end of the driving rod (4) is matched with the electromagnet (5), and the other end is connected with the limiting member (3).

3. The circuit breaker with the function of preventing false switching-on according to claim 2, wherein the driving rod (4) and the limiting member (3) are connected with each other by a shaft and a slot in a matching manner.

4. The circuit breaker with the function of preventing false switching-on according to claim 2, wherein the limiting device is an internal accessory of the circuit breaker, the limiting member (3) is composed of a limiting plate slidably disposed in a housing (1) of the circuit breaker, the electromagnet (5) is fixed in the housing (1), the driving rod (4) is rotatably disposed in the housing (1), an elastic member (41) is disposed between the driving rod (4) and the housing (1), a first stopping member (12) is disposed on the housing (1), the driving rod (4) keeps the trend of movement of the limiting member (3) to the first stopping member (12) under the action of the elastic member (41), and the limiting member (3) is located at a first position abutted against the first stopping member (12) or abutted against the handle (2).

5. The circuit breaker with the function of preventing false switching according to claim 2, wherein the limiting device is an external accessory of the circuit breaker, the limiting device further comprises a housing (300) fixed outside the circuit breaker and located on one side of the handle (2), the limiting member (3) is formed by a limiting rod, a through hole (302) for the reciprocating motion of the limiting member (3) is formed in the housing (300), the electromagnet (5) is fixed in the housing (300), the driving rod (4) is rotatably disposed in the housing (300), an elastic member (41) is disposed between the driving rod (4) and the housing (300), a second limiting member (303) is disposed on the housing (300), the driving rod (4) keeps the movement tendency of the limiting member (3) extending out of the housing (300) under the action of the elastic member (41), and when the driving rod (4) is under the action of the elastic member (41) and the second limiting member (303), the limiting piece (3) is located at a first position, and the limiting piece (3) extends out of the shell cover (300); when the electromagnet (5) acts on the driving rod (4), the limiting piece (3) retracts into the shell cover (300) at the moment, and the limiting piece (3) is located at the second position.

6. The circuit breaker with the function of preventing false switching-on according to claim 5, wherein a handle follower plate (6) is arranged between the second stop member (303) and the housing (300), the handle follower plate (6) can move along with the handle (2), and when the handle (2) leaves the switching-off position, the handle follower plate (6) blocks the movement of the limiting member (3) to the first position under the action of the elastic member (41).

7. The circuit breaker with the function of preventing false switching-on according to claim 6, wherein the housing (300) is further provided with a moving hole (301) formed along the moving track of the handle (2), the handle follower plate (6) is hinged to the handle (2) through a follower shaft (61), and the follower shaft (61) can move in the moving hole (301) along with the handle (2).

8. The circuit breaker with the function of preventing false switching-on according to claim 4, wherein the elastic member (41) is a torsion spring, a middle portion of the torsion spring is sleeved on the rotating shaft (14) of the driving rod (4), and two spring legs of the elastic member (41) respectively abut against the driving rod (4) and the housing (1).

9. The circuit breaker with the function of preventing false switching-on according to claim 5, wherein the elastic member (41) is a torsion spring, a middle portion of the torsion spring is sleeved on the rotating shaft (14) of the driving rod (4), and two spring legs of the elastic member (41) respectively abut against the driving rod (4) and the housing (300).

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