CN212625454U - Short-circuit short-delay signal trigger device for selectively protecting direct current circuit breaker - Google Patents
Short-circuit short-delay signal trigger device for selectively protecting direct current circuit breaker Download PDFInfo
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- CN212625454U CN212625454U CN202021172391.2U CN202021172391U CN212625454U CN 212625454 U CN212625454 U CN 212625454U CN 202021172391 U CN202021172391 U CN 202021172391U CN 212625454 U CN212625454 U CN 212625454U
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Abstract
The utility model relates to a short circuit short delay signal trigger device especially discloses a short circuit short delay signal trigger device of selectivity protection direct current circuit breaker, including current-carrying conductor, bimetallic strip, yoke, spring, armature support, micro-gap switch and micro-gap switch support, current-carrying conductor, bimetallic strip, yoke and armature support riveting are in the same place, the armature erects to constitute on the armature support and rotates the setting, and the one end and the armature leg joint of spring, the other end are connected with the upper end of armature, micro-gap switch support's one end supplies micro-gap switch fixed, the other end and armature support fixed connection. By adopting the structure, the short-circuit short-delay signal trigger device for the selective protection direct-current circuit breaker is simple in structure, easy to realize, small in change of the existing product, low in cost, and high in triggering reliability and delay accuracy.
Description
Technical Field
The utility model relates to a short circuit short delay signal trigger device, especially a short circuit short delay signal trigger device of selectivity protection direct current circuit breaker.
Background
In order to ensure the continuity of power supply, reliably remove faults and minimize the power failure range, a low-voltage power distribution system often selects a low-voltage power distribution product with selective protection to realize the selective protection of a power supply line.
Selective protection means that the operating characteristics of two or more protection devices are matched, and when a short circuit, a ground connection or other overcurrent phenomenon occurs within a certain specified range, the device designated to operate within the range operates to remove a fault, and the device outside the range does not operate. That is, when a fault occurs at a certain point in the low-voltage distribution system, the protective circuit on the line is selectively opened and closed according to a predetermined action sequence, and override action is absolutely not allowed.
The plastic-shell circuit breaker selective protection has two realization forms, namely an electromagnetic type and an electronic type, wherein the electronic type is widely adopted due to low cost, short research and development period, capability of being directly designed and developed on the existing platform product and reliable action. The electronic type realization principle is that a short-circuit short-delay signal is provided to a short-delay electronic circuit board through a short-circuit short-delay signal trigger device, the short delay is realized by the electronic circuit board, a tripping signal is output to a shunt release, and the shunt release drives a circuit breaker to trip.
At present, electronic molded case circuit breakers with selective protection in the market are researched and developed on the basis of the existing molded case circuit breakers. The implementation mode of each home is different aiming at a key ring, namely a trigger device of the electronic short-circuit short-delay signal. The common realization mode is that the initial state is normally open, for example, Chinese patent with application number 201120364278.9, which discloses a short-circuit short-delay protection device of a circuit breaker, comprising a bracket, a microswitch, a trigger rod, a bent armature, a conductive bar, a magnetic yoke, a spring, a control circuit board, a shunt release and an armature bracket, wherein the bracket is fixed on a base of the circuit breaker; the microswitch is fixed at the upper end of the bracket and is connected with the control circuit board; the control circuit board is connected with the shunt release; the shunt release is connected with the circuit breaker; the upper end of the armature support is provided with a positioning groove, the upper end of the armature is fixed with the trigger rod, and the lower end of the armature is placed in the positioning groove; one end of the spring is fixed on the armature bracket, and the other end of the spring is fixed at the upper end of the armature; the magnetic yoke is fixed on the armature bracket and connected with the conductive bar.
Above-mentioned support is fixed on the base of circuit breaker, and the installation step is many, and relative position is unfixed, causes the dislocation easily, reduces the accuracy, and it realizes signal trigger's structure through hitting closed micro-gap switch, nevertheless hits the error that the closed spring in the twinkling of an eye can cause the short time delay of beating, and the structure is complicated, and the installation is inconvenient.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a simple structure, easily realize, change little to current product, low cost, reliability and the high selectivity of time delay accuracy that trigger protect direct current circuit breaker's short circuit delay signal trigger device.
In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a short circuit short delay signal trigger device of selectivity protection direct current circuit breaker, includes current-carrying conductor, bimetallic strip, yoke, spring, armature support, micro-gap switch and micro-gap switch support, current-carrying conductor, bimetallic strip, yoke and armature support riveting are in the same place, the armature erects to constitute on the armature support and rotates the setting, and the one end and the armature leg joint of spring, the other end are connected with the upper end of armature, the one end of micro-gap switch support supplies micro-gap switch fixed, the other end and armature support fixed connection.
Among the above-mentioned technical scheme, current-carrying conductor, bimetallic strip, yoke, spring, armature and armature support's connection and structure belong to prior art, and this is no longer repeated here, and micro-gap switch support fixed connection is on armature support, as an subassembly for the relative position of micro-gap switch and armature is fixed, and the product uniformity is better, need not debug, improves the installation effectiveness.
As a further setting of the utility model, the micro-gap switch support is riveted with armature support.
Among the above-mentioned technical scheme, it is convenient to connect, and the junction is firm reliable, and preferred riveting point location is two, avoids taking place relative rotation.
As a further setting of the utility model, the micro-gap switch support sets up with armature support is integrative.
Among the above-mentioned technical scheme, processing is convenient, and the part is few, and is small.
As a further setting of the utility model, the tip and the armature support, bimetallic strip, yoke, current-carrying conductor riveting of micro-gap switch support are in the same place.
In the technical scheme, the armature bracket, the bimetallic strip, the magnet yoke and the current-carrying conductor are riveted together, so that the end part of the preferred microswitch bracket is riveted with the armature bracket, the bimetallic strip, the magnet yoke and the current-carrying conductor together, the integrity is improved, and the connecting parts and the working procedures are reduced.
As the utility model discloses a further setting, be provided with the trigger bar on the armature, the contact butt of trigger bar and micro-gap switch works as when armature rotates under short-circuit current's effect, drives the synchronous rotation of trigger bar makes the contact of trigger bar and micro-gap switch throw off.
Among the above-mentioned technical scheme, the trigger bar can be the mode of fixed connection such as integral connection or riveting or welding with armature, during the use, micro-gap switch is In the state of normally closed, when armature rotated under short-circuit current's effect, the trigger bar rotates along with armature is synchronous, make trigger bar and micro-gap switch's contact throw off, output short circuit short time delay trigger signal, this trigger mode adopts normally closed release mode, compare normally open closed mode, the error that the spring arouses when having avoided the closure, the reliability and the accuracy of time delay of having improved greatly to trigger, keep having now 10In action characteristic unchangeable simultaneously, need not to match the spring again, be convenient for adjust, the cycle of research and development has been shortened greatly.
As a further arrangement of the present invention, the upper and lower structure of the trigger bar and the micro switch is formed, and the micro switch is located below the trigger bar.
Among the above-mentioned technical scheme, armature makes the trigger bar butt on micro-gap switch's contact under the pulling force effect of spring, and micro-gap switch is closed promptly, when armature becomes clockwise rotation under short-circuit current's effect, can drive the trigger bar and rotate until separating with micro-gap switch's contact along oblique top, and micro-gap switch disconnection output short circuit short delay trigger signal promptly need not to change the structure of other parts, simple structure, reasonable in design.
As the utility model discloses a further setting, structure about trigger bar and micro-gap switch become, micro-gap switch's contact sets up with armature relatively.
Among the above-mentioned technical scheme, micro-gap switch sets up with the bottom surface of circuit breaker is perpendicular, when armature becomes clockwise rotation under short-circuit current's effect, can drive the trigger bar and rotate along oblique top until with micro-gap switch's contact separately, micro-gap switch disconnection output short circuit short delay trigger signal promptly, need not to change the structure of other parts, simple structure, reasonable in design.
As a further setting of the utility model, the trigger bar and the armature set up as an organic whole.
Among the above-mentioned technical scheme, processing is convenient, connects firmly, and the synchronism is strong, and the electric current of being convenient for flows through, and the precision is high.
As a further arrangement of the present invention, the micro switch bracket is made of a non-magnetic material.
Among the above-mentioned technical scheme, the micro-gap switch support can be that non-magnetic materials such as brass, stainless steel make, avoids influencing current magnetic system.
The present invention will be further described with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is an exploded view of the structure of the second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a third embodiment of the present invention;
fig. 5 is an exploded view of a third embodiment of the present invention.
Detailed Description
The utility model discloses a concrete embodiment is shown in figures 1-5, a selectivity protection direct current circuit breaker's short circuit short delay signal trigger device, including current-carrying conductor 1, bimetallic strip 2, yoke 3, spring, armature 4, armature support 5, micro-gap switch 6 and micro-gap switch support 7, current-carrying conductor 1, bimetallic strip 2, yoke 3 and armature support 5 riveting are in the same place, armature 4 erects to constitute on armature support 5 and rotates the setting, and the one end and the armature support 5 of spring are connected, and the other end is connected with armature 4's upper end, micro-gap switch support 7's one end supplies micro-gap switch 6 fixed, the other end and armature support 5 fixed connection. Current-carrying conductor 1, bimetallic strip 2, yoke 3, spring, armature 4 and armature support 5's connection and structure belong to prior art, and this is no longer repeated here, and micro-gap switch support 7 fixed connection is on armature support 5, as an subassembly for micro-gap switch 6 and armature 4's relative position is fixed, and the product uniformity is better, need not debug, improves the installation effectiveness.
As shown in fig. 1-3, in the first and second embodiments, the microswitch bracket 7 is riveted to the armature bracket 5. The connection is convenient, the connection is firm and reliable, and the preferred riveting points are two, so that the relative rotation is avoided.
In the third embodiment, the microswitch bracket 7 is arranged integrally with the armature bracket 5, as shown in fig. 4 to 5. Convenient processing, few parts and small volume.
The end part of the micro-switch bracket 7 is riveted with the armature bracket 5, the bimetallic strip 2, the magnet yoke 3 and the current-carrying conductor 1. Because the armature bracket 5, the bimetallic strip 2, the magnet yoke 3 and the current-carrying conductor 1 are riveted together, the end part of the preferred microswitch bracket 7 is riveted with the armature bracket 5, the bimetallic strip 2, the magnet yoke 3 and the current-carrying conductor 1 together, the sequencing among the microswitch bracket 7, the armature bracket 5, the bimetallic strip 2, the magnet yoke 3 and the current-carrying conductor 1 can be replaced, the integrity is improved, and the connecting parts and the working procedures are reduced.
The armature 4 is provided with a trigger rod 41, the trigger rod 41 is abutted against a contact piece 61 of the microswitch 6, and when the armature 4 rotates under the action of short-circuit current, the trigger rod 41 is driven to synchronously rotate so that the trigger rod 41 is separated from the contact piece 61 of the microswitch 6.
The trigger bar 41 and the armature 4 can be fixedly connected In an integral connection mode or a riveting or welding mode, when In use, the microswitch 6 is In a normally closed state, when the armature 4 rotates under the action of short-circuit current, the trigger bar 41 rotates along with the armature 4 synchronously, so that the trigger bar 41 is separated from a contact plate 61 of the microswitch 6, and a short-circuit short-delay trigger signal is output, the trigger mode adopts a normally closed release mode, compared with a normally open closed mode, the error caused by bounce during closing is avoided, the reliability and the accuracy of delay of triggering are greatly improved, meanwhile, the existing 10In action characteristic is kept unchanged, a spring does not need to be matched again, the regulation is convenient, and the research and development period is greatly shortened, In the prior art, the microswitch 6 is closed, and the shunt release is released, the design is that the microswitch 6 is opened, the shunt release is released, and the change can be realized by modifying a control circuit, and will not be described in detail herein.
The trigger rod 41 and the microswitch 6 are in an up-and-down structure, and the microswitch 6 is positioned below the trigger rod 41. Armature 4 makes trigger bar 41 butt on micro-gap switch 6's contact 61 under the pulling force effect of spring, and micro-gap switch 6 is closed promptly, when armature 4 becomes clockwise rotation under short-circuit current's effect, can drive trigger bar 41 and rotate along oblique top until with micro-gap switch 6's contact 61 separately, and micro-gap switch 6 disconnection output short circuit short time delay trigger signal promptly need not to change the structure of other parts, simple structure, reasonable in design.
The trigger rod 41 and the micro switch 6 form a left-right structure, and a contact piece 61 of the micro switch 6 is arranged opposite to the armature 4. Micro-gap switch 6 sets up with the bottom surface of circuit breaker is perpendicular, and when armature 4 becomes clockwise rotation under short-circuit current's effect, can drive trigger bar 41 and rotate along oblique top until with micro-gap switch 6's contact 61 separately, micro-gap switch 6 disconnection output short circuit short delay trigger signal promptly need not to change the structure of other parts, simple structure, reasonable in design.
As shown in fig. 1 and 2, the microswitch 6 is disposed in parallel with the bottom surface of the breaker or in an inclined manner with respect to the bottom surface of the breaker. When the micro switch 6 and the trigger rod 41 are in an up-and-down structure, the micro switch 6 can be horizontally arranged or obliquely arranged, the process from normal close to release can be realized, and the structure is simple.
The end 411 of the trigger lever 41 is curved in an arc shape. The curved end 411 is provided to facilitate the contact of the end 411 of the trigger lever 41 with the contact piece 61 of the micro switch 6 and to avoid damage to the contact piece 61, and the contact surface of the arc surface facilitates the contact of the trigger lever 41 with the contact piece 61 of the micro switch 6 because the trigger lever 41 is rotated.
The trigger lever 41 and the armature 4 are integrally provided. The processing is convenient, connects firmly, and the synchronism is strong, and the electric current of being convenient for flows through, and the precision is high.
The microswitch 6 is fixed on the microswitch bracket 7 through a screw. Convenient connection and stable structure.
The microswitch bracket 7 is made of a non-magnetic material. The microswitch bracket 7 can be made of non-magnetic materials such as brass, stainless steel and the like, so that the influence on the existing magnetic system is avoided.
The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.
Claims (9)
1. The utility model provides a selectivity protection direct current circuit breaker's short circuit short delay signal trigger device, includes current-carrying conductor, bimetallic strip, yoke, spring, armature support, micro-gap switch and micro-gap switch support, current-carrying conductor, bimetallic strip, yoke and armature support riveting are in the same place, the armature erects to constitute on the armature support and rotates the setting, and the one end and the armature support of spring are connected, and the other end is connected its characterized in that with the upper end of armature: one end of the micro switch bracket is used for fixing the micro switch, and the other end of the micro switch bracket is fixedly connected with the armature bracket.
2. The short circuit short delay signal trigger apparatus for selectively protecting a direct current circuit breaker according to claim 1, wherein: the micro switch bracket is riveted with the armature bracket.
3. The short circuit short delay signal trigger apparatus for selectively protecting a direct current circuit breaker according to claim 1, wherein: the micro switch bracket and the armature bracket are integrally arranged.
4. The short circuit short delay signal trigger apparatus for selectively protecting a direct current circuit breaker according to claim 2, wherein: the end part of the micro-switch bracket is riveted with the armature bracket, the bimetallic strip, the magnet yoke and the current-carrying conductor.
5. The short circuit short delay signal triggering apparatus for selectively protecting a direct current circuit breaker according to any one of claims 1 to 4, wherein: the armature is provided with a trigger rod, the trigger rod is abutted against a contact piece of the micro switch, and when the armature rotates under the action of short-circuit current, the trigger rod is driven to rotate synchronously to enable the trigger rod to be disengaged from the contact piece of the micro switch.
6. The short circuit short delay signal trigger apparatus for selectively protecting a direct current circuit breaker according to claim 5, wherein: the trigger rod and the micro switch form an up-down structure, and the micro switch is positioned below the trigger rod.
7. The short circuit short delay signal trigger apparatus for selectively protecting a direct current circuit breaker according to claim 5, wherein: the trigger rod and the microswitch form a left-right structure, and a contact piece of the microswitch is opposite to the armature.
8. The short circuit short delay signal triggering device of the selective protection direct current circuit breaker according to claim 6 or 7, characterized in that: the trigger rod and the armature are arranged integrally.
9. The short delay signal trigger apparatus for selectively protecting a direct current circuit breaker according to claim 1 or 2 or 3 or 4 or 6 or 7, wherein: the micro-switch bracket is made of a non-magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021172391.2U CN212625454U (en) | 2020-06-22 | 2020-06-22 | Short-circuit short-delay signal trigger device for selectively protecting direct current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021172391.2U CN212625454U (en) | 2020-06-22 | 2020-06-22 | Short-circuit short-delay signal trigger device for selectively protecting direct current circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN212625454U true CN212625454U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021172391.2U Active CN212625454U (en) | 2020-06-22 | 2020-06-22 | Short-circuit short-delay signal trigger device for selectively protecting direct current circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN212625454U (en) |
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- 2020-06-22 CN CN202021172391.2U patent/CN212625454U/en active Active
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