CN218215190U - Shunt release and moulded case circuit breaker - Google Patents

Abstract

The utility model provides a shunt release and moulded case circuit breaker, shunt release includes: the magnetic flux converter comprises a push rod, a magnetic flux converter, a shifting fork and a refastening plate, wherein the shifting fork is connected with a movable iron core of the magnetic flux converter; the refastening plate is connected with the shifting fork; the movable iron core of the magnetic flux converter is pushed back to be attracted with the permanent magnet of the magnetic flux converter by poking the refastening plate to drive the shifting fork, and a counter force spring of the magnetic flux converter is compressed to store energy; the push rod and the movable iron core of the magnetic flux converter are coaxially and correspondingly arranged, the electromagnetic coil of the magnetic flux converter is electrified to generate magnetic lines of force opposite to the permanent magnet, and then the movable iron core is driven by the counter-force spring to impact the push rod to move. The quick and stable tripping of the molded case circuit breaker can be realized.

Description

Shunt release and moulded case circuit breaker

Technical Field

The utility model relates to a circuit breaker field, concretely relates to shunt release, moulded case circuit breaker who has this shunt release.

Background

The circuit breaker product generally comprises an operating mechanism, a contact mechanism, a locking mechanism and a tripping mechanism, and the tripping power of the existing 24V shunt excitation of the molded case circuit breaker is more than 50W. In the field of new energy, in order to improve product competitiveness and product operation reliability, a low-power direct-current power supply system is selected for new energy equipment, and the power of an existing shunt release cannot meet use requirements. When the circuit is in an abnormal condition, the power supply needs to be cut off emergently, the shunt release cannot be driven to act reliably due to insufficient power, and safety accidents are easily caused when the circuit cannot be cut off reliably.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a shunt release and a molded case circuit breaker with the shunt release; the quick and stable tripping can be realized.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a shunt release comprising: the magnetic flux converter comprises a push rod, a magnetic flux converter, a shifting fork and a refastening plate, wherein the shifting fork is connected with a movable iron core of the magnetic flux converter; the refastening plate is connected with the shifting fork; the movable iron core of the magnetic flux converter is pushed back to be attracted with the permanent magnet of the magnetic flux converter by poking the refastening plate to drive the shifting fork, and a counter force spring of the magnetic flux converter is compressed to store energy; the push rod and the movable iron core of the magnetic flux converter are coaxially and correspondingly arranged, the electromagnetic coil of the magnetic flux converter is electrified to generate magnetic lines of force opposite to the permanent magnet, and then the movable iron core is driven by the counter-force spring to impact the push rod to move.

The push rod, the magnetic flux converter and the shifting fork are assembled in the base shell, and the refastening plate is positioned on the outer side of the base shell; the base shell is provided with a through hole through which the abdicating push rod penetrates out.

Furthermore, the shifting fork comprises a shifting fork body, a shifting fork part and a connecting piece, the shifting fork part is connected with the shifting fork body, the shifting fork body is provided with a rotating shaft and can rotate along the rotating shaft, the shifting fork part is connected with a movable iron core of the magnetic flux converter, and the connecting piece is connected with the refastening plate.

Furthermore, the shifting fork is of an integrated connecting structure.

Furthermore, the connecting piece is a plugboard which is fixedly inserted on the refastening plate.

Furthermore, a reset torsion spring is assembled on the shifting fork, and applies torsion towards the direction of the push rod to the shifting fork.

Furthermore, the magnetic flux converter also comprises a microswitch which is connected in series with a power supply loop of an electromagnetic coil of the magnetic flux converter.

Furthermore, the magnetic flux converter further comprises an elastic resetting piece, wherein the elastic resetting piece acts on the push rod to apply a resetting force towards the direction of the movable iron core of the magnetic flux converter to the push rod, and the elastic force of the elastic resetting piece is far smaller than that of a counter force spring of the magnetic flux converter.

Furthermore, the elastic reset piece is a reset spring, the reset spring is sleeved on the push rod, a butt convex ring is arranged on the push rod, and the reset spring is in butt joint with the butt convex ring.

The utility model provides a moulded case circuit breaker, includes the casing and assembles in operating device, contact mechanism, latched device and the tripping device of casing, tripping device does the aforesaid shunt release, still be equipped with toggle handle on the casing, the refastening plate with toggle handle linkage.

Through the utility model provides a technical scheme has following beneficial effect:

the scheme is characterized in that energy is stored in advance through the magnetic flux converter, namely, the shifting fork is driven to act by controlling the refastening plate, the shifting fork pushes a movable iron core of the magnetic flux converter back to be attracted with the permanent magnet, and at the moment, the counter force spring in the magnetic flux converter realizes energy storage; when the electromagnetic coil of the magnetic flux converter is electrified, magnetic lines of force opposite to the permanent magnet are generated, the balance state of the permanent magnet and the counter-force spring is broken, and quick and stable tripping is realized; thereby realizing the breaking of the main loop.

Drawings

Fig. 1 is an external view of an embodiment of a shunt release;

fig. 2 is a schematic structural view of the shunt release in the embodiment after the cover plate is hidden;

fig. 3 is an exploded schematic view of the shunt release in the embodiment;

fig. 4 is a sectional view of the shunt release in the embodiment;

fig. 5 is a partial structural schematic diagram of the shunt release in the embodiment;

FIG. 6 is a schematic structural view of a fork according to an embodiment;

fig. 7 is a partial structural schematic view of the molded case circuit breaker according to the embodiment;

fig. 8 is a schematic diagram of a molded case circuit breaker according to an embodiment.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 6, the present embodiment provides a shunt release 100, including: the push rod 12, the magnetic flux converter 11, the shift fork 13 and the refastening plate 14, specifically, in the present embodiment, the magnetic flux converter 11 is a prior art structure, and has a structure of an electromagnetic coil, a movable iron core 111, a permanent magnet, a reaction spring 112, and the like. The push rod 12 is coaxial with and arranged corresponding to the movable iron core 111 of the magnetic flux converter 11, that is, the movable iron core 111 of the magnetic flux converter 11 directly aligns to the end of the push rod 12, and the shifting fork 13 is connected with the movable iron core 111 of the magnetic flux converter 11; the refastening plate 14 is connected with the shifting fork 13. The operating principle of the shunt release 100 is as follows: in the energy storage stage, the refastening plate 14 is shifted to drive the shifting fork 13 to push the movable iron core 111 of the magnetic flux converter 11 back to be attracted with the permanent magnet of the magnetic flux converter 11, namely, the refastening plate 14 is shifted to drive the shifting fork 13 to act, the shifting fork 13 pushes the movable iron core 111 of the magnetic flux converter 11 back to be attracted with the permanent magnet (the movable iron core 111 moves away from the direction of the push rod 12 until being attracted with the permanent magnet), and at the moment, the counter force spring 112 in the magnetic flux converter 11 is compressed to realize energy storage. When the electromagnetic coil of the magnetic flux converter 11 is energized, magnetic lines of force opposite to the permanent magnet are generated, the balance state between the permanent magnet and the reaction spring 112 is broken, the reaction spring 112 drives the movable iron core 111 to rapidly eject outwards, and then the movable iron core strikes the push rod 12, so that the push rod 12 is pushed out in the direction away from the magnetic flux converter 11.

With continued reference to fig. 7 and 8, the present embodiment further provides a molded case circuit breaker, including a housing 30, and an operating mechanism, a contact mechanism, a locking mechanism, and a tripping mechanism assembled on the housing 30, where the tripping mechanism is the shunt release 100, the housing 30 is further equipped with a toggle handle 31, and the re-buckling plate 14 is linked with the toggle handle 31.

Specifically, referring to fig. 7, an end of the push rod 12 facing away from the magnetic flux transformer 11 corresponds to a tripping traction rod 20. When the push rod 12 is pushed out in a direction away from the magnetic flux transformer 11 by the striking of the movable iron core 111, the trip lever 20 is struck, and the trip lever 20 is tripped.

The molded case circuit breaker adopted by the embodiment can realize quick and stable tripping even if a newly designed system of a customer cannot provide corresponding power when tripping due to the pre-stored energy of the magnetic flux converter 11. Meanwhile, the refastening plate 14 is linked with the toggle handle 31, and when energy is stored, the operation can be realized by operating the toggle handle 31, so that the operation is simple and convenient.

Specifically, in this embodiment, the shunt release 100 further includes a base shell 18, the push rod 12, the magnetic flux transformer 11 and the shift fork 13 are assembled in the base shell 18, and the refastening plate 14 is located outside the base shell 18; the base shell 18 is provided with a through hole through which the abdicating push rod 12 penetrates; therefore, the shunt release 100 forms an independent device structure, and realizes integral independent packaging, namely, the shunt release can be assembled in advance and then uniformly assembled on the shell 30 of the molded case circuit breaker, so that the shunt release is convenient to assemble.

More specifically, the base shell 18 includes a lower shell 181 and a cover plate 182, the push rod 12, the magnetic flux converter 11 and the shift fork 13 are all assembled on the lower shell 181, the cover plate 182 covers the lower shell 181, and the refastening plate 14 is located outside the lower shell 181 of the base shell 18. So arranged, the assembly of the push rod 12, the magnetic flux transformer 11 and the shift fork 13 is facilitated.

Of course, in other embodiments, the base housing 18 may not be provided, and the components of the shunt release 100 may be assembled on the housing 30 of the molded case circuit breaker.

Further, the shifting fork 13 comprises a shifting fork body 131, and a shifting fork member 132 and a connecting member 133 which are connected with the shifting fork body 131, wherein the shifting fork body 131 is provided with a rotating shaft 15 and can rotate along the rotating shaft 15, specifically, a shaft hole 134 is arranged on the shifting fork body 131, and the rotating shaft 15 is assembled in the shaft hole 134; the shifting fork 132 is connected with the movable iron core 111 of the magnetic flux converter 11, and the connecting piece 133 is connected with the refastening plate 14. When the rebounding plate 14 is pulled, the fork 132 is driven to swing around the rotating shaft 15, so that the movable iron core 111 of the magnetic flux converter 11 can be pulled to move.

Specifically, the shifting fork 13 is of an integrated connection structure, and can be integrally formed in a die casting mode or formed in a stamping mode, so that the shifting fork is easy to manufacture.

Specifically, the connecting piece 133 is a plug board, and the plug board is fixedly inserted on the refastening plate 14, so that the connecting piece 133 and the refastening plate 14 are assembled and connected, and the buckle is simple in structure and easy to assemble.

Specifically, be provided with U type opening 135 on the declutch shift member 132, move iron core 111 and wear to locate in the U type opening 135, move the structure that is provided with conflict step etc. and declutch shift member butt on the iron core 111, when the shift fork 13 was stirred, declutch shift member 132 butt was on moving iron core 111, and then driven and moved iron core 111 along deviating from 12 directions of push rod, until with the permanent magnet actuation.

Specifically, be equipped with reset torsion spring 16 on the shift fork 13, reset torsion spring 16 exerts the torsion of orientation push rod 12 direction to shift fork 13, and this reset torsion spring 16's setting can exert a restoring force to shift fork 13, and when shift fork 13 drove movable iron core 111 along deviating from push rod 12 direction and removing external force to the actuation promptly, shift fork 13 resets towards push rod 12 direction under reset torsion spring 16's effect, so sets up, when movable iron core 111 released towards push rod 12 direction, shift fork 13 can not have any to stop to it, guarantees movable iron core 111's thrust.

Of course, in other embodiments, the structure and assembly manner of the fork 13 (such as connection with the refastening plate 14, cooperation with the plunger 111, etc.) are not limited thereto.

Further, the shunt release 100 further includes an elastic reset member 17, the elastic reset member 17 acts on the push rod 12 to apply a reset force to the push rod 12 in a direction toward the movable core 111 of the magnetic flux transformer 11, and after the push rod 12 is pushed out by the movable core 111 of the magnetic flux transformer 11 to complete a trip impact, the push rod 12 returns to reset again under the action of the elastic reset member 17 to wait for a next operation; the elastic force of the elastic reset piece 17 is far smaller than the elastic force of the counter force spring of the magnetic flux transformer 11; with this arrangement, the influence of the elastic restoring member 17 on the push rod 12 can be reduced as much as possible. The elastic force of the elastic reset piece 17 is selected so as to drive the push rod 12 to reset without affecting the impact operation of the push rod 12.

Specifically, in this embodiment, the elastic reset member 17 is a reset spring, the reset spring is sleeved on the push rod 12, the push rod 12 is provided with a contact convex ring 121, the reset spring is in contact with the contact convex ring 121, and the other end of the reset spring is in contact with the base shell 18. Of course, in other embodiments, when the shunt release 100 does not have the base housing 18, the return spring may abut against other fixed components (such as the housing 30 of the circuit breaker, etc.), so as to apply the return force to the push rod 12; or the elastic reset piece 17 can also adopt other elastic pieces which can apply reset force to the push rod; further alternatively, the elastic restoring member 17 may not be provided, so that the restoring of the push rod 12 may be driven by the action of the trip lever 20 to be restored, but the effect may be poor.

Further preferably, in this embodiment, the shunt release 100 further includes a micro switch 19, the micro switch 19 is assembled on the base shell 18, and is connected in series to a power supply circuit of the electromagnetic coil of the magnetic flux converter 11, the circuit breaker is tripped after the electromagnetic coil is powered on, the circuit breaker is tripped, the micro switch 19 can be reset, the micro switch 19 is reset, the circuit of the electromagnetic coil is disconnected, the electromagnetic coil is protected, and failure caused by long-time power-on heating in the use process of the electromagnetic coil is prevented.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A shunt release, comprising: the magnetic flux converter comprises a push rod, a magnetic flux converter, a shifting fork and a refastening plate, wherein the shifting fork is connected with a movable iron core of the magnetic flux converter; the refastening plate is connected with the shifting fork; the movable iron core of the magnetic flux converter is pushed back to be attracted with the permanent magnet of the magnetic flux converter by poking the refastening plate to drive the shifting fork, and a counter force spring of the magnetic flux converter is compressed to store energy; the push rod and the movable iron core of the magnetic flux converter are coaxially and correspondingly arranged, the electromagnetic coil of the magnetic flux converter is electrified to generate magnetic lines of force opposite to the permanent magnet, and then the movable iron core is driven by the counter-force spring to impact the push rod to move.

2. The shunt release of claim 1, wherein: the push rod, the magnetic flux converter and the shifting fork are assembled in the base shell, and the refastening plate is positioned on the outer side of the base shell; the base shell is provided with a through hole through which the abdicating push rod penetrates out.

3. The shunt release of claim 1 or 2, wherein: the shifting fork comprises a shifting fork body, a shifting fork part and a connecting part, wherein the shifting fork part and the connecting part are connected with the shifting fork body, the shifting fork body is provided with a rotating shaft and can rotate along the rotating shaft, the shifting fork part is connected with a movable iron core of the magnetic flux converter, and the connecting part is connected with the refastening plate.

4. The shunt release of claim 3, wherein: the shifting fork is of an integrated connecting structure.

5. The shunt release of claim 3, wherein: the connecting piece is a plugboard which is fixedly inserted on the refastening plate.

6. The shunt release of claim 3, wherein: the shifting fork is provided with a reset torsion spring, and the reset torsion spring applies torsion towards the direction of the push rod to the shifting fork.

7. The shunt release of claim 1 or 2, wherein: the magnetic flux converter also comprises a microswitch which is connected in series on a power supply loop of an electromagnetic coil of the magnetic flux converter.

8. The shunt release of claim 1 or 2, wherein: the elastic reset piece acts on the push rod to apply reset force towards the direction of the movable iron core of the magnetic flux converter to the push rod, and the elastic force of the elastic reset piece is far smaller than that of a counter force spring of the magnetic flux converter.

9. The shunt release of claim 8, wherein: the elastic reset piece is a reset spring, the reset spring is sleeved on the push rod, a butt convex ring is arranged on the push rod, and the reset spring is in butt connection with the butt convex ring.

10. The utility model provides a moulded case circuit breaker, includes the casing and assembles in operating device, contact mechanism, latched device and the tripping device of casing, its characterized in that: the tripping mechanism is the shunt release of any one of claims 1 to 9, the shell is also provided with a toggle handle, and the re-buckling plate is linked with the toggle handle.

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