Fault trip signal feedback device and circuit breaker

Abstract

The present application discloses a fault trip signal feedback device and a circuit breaker. The fault trip signal feedback device is installed in the circuit breaker, and comprises an actuator and a fault trip signal feedback module. The main body of the fault trip signal feedback module is installed outside the actuator. The actuator is finally electrically connected to a signal receiving device in a controller through a connecting wire of the fault trip signal feedback module. The actuator transmits mechanical motion to the fault trip signal feedback module, and the fault trip signal feedback module generates a fault trip signal and transmits it to the signal receiving device in the controller. The present application solves the problem that the actuator is difficult to implement when the trip signal needs to be fed back to multiple places, and achieves the beneficial effect of easily expanding the number of fault trip signal feedbacks.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a fault tripping signal feedback device of a circuit breaker and a circuit breaker. Background Art

[0002] When the circuit breaker detects a line fault, its actuator operates to disconnect the main circuit and needs to feed back a fault trip signal to the user. In the prior art, due to the limited space inside the actuator, when the fault trip signal needs to be fed back to multiple locations, such as more than three locations, the current actuator cannot achieve this. When the fault trip signal is fed back to multiple locations at the same time, the contact capacity is insufficient. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present application provides a fault trip signal feedback device for a circuit breaker to solve the problem that the actuator is difficult to implement when the trip signal of the prior art needs to be fed back to multiple locations.

[0004] To achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A fault trip signal feedback device is installed in a circuit breaker, comprising an actuator and a fault trip signal feedback module, wherein the main body of the fault trip signal feedback module is installed outside the actuator, and the actuator is finally electrically connected to a signal receiving device in a controller through a connecting wire of the fault trip signal feedback module. The actuator transmits mechanical motion to the fault trip signal feedback module, and the fault trip signal feedback module generates a fault trip signal and transmits it to the signal receiving device in the controller.

[0006] Preferably, the fault tripping signal feedback module is connected to the secondary terminal using a connecting wire and then connected to a signal receiving device in the controller.

[0007] Preferably, the fault trip signal feedback module comprises an upper cover and a base, the base is mounted on the top of the actuator, and the upper cover is mounted on the base.

[0008] Preferably, the actuator includes a lever, and the fault trip signal feedback module also includes a push rod, a micro switch and a spring, the micro switch and the spring are installed in the space formed by the upper cover and the base, the wire is connected to the pin of the micro switch, the push rod includes a guide reset part, a switch opening and closing part and a motion conduction part, the guide reset part and the switch opening and closing part are all located in the space formed by the upper cover and the base, one end of the motion conduction part extends into the space formed by the upper cover and the base, and the other end extends into the actuator and contacts and links with the moving part of the lever.

[0009] Preferably, the moving part of the lever is at its top, the lever rotates around its axis, the motion transmission part of the push rod includes a straight rod, one end of the straight rod extends into the actuator and contacts the top of the lever and links with the top of the lever, the straight rod is perpendicular to the normal direction of movement of the top of the lever, and the outer shell of the actuator is provided with a through hole at the position where the straight rod passes through the outer shell.

[0010] Preferably, the motion conducting part of the push rod also includes a cantilever, which is connected through its switch opening and closing part and the guide reset part. The cantilever is located outside the actuator, the upper cover and the base. The guide reset part is generally parallel to the straight rod. One end of the straight rod extending into the actuator is located on the same side of the cantilever as the guide reset part and the switch opening and closing part of the push rod.

[0011] Preferably, a through slot for installing a spring is opened in the middle of the guide reset portion of the push rod, and a spring fixing plate is provided on the base and is upward and perpendicular to the straight handle. The spring fixing plate extends into the through slot, and the spring installation direction is parallel to the straight handle. The push rod is pushed or reset by the lever along the direction of the straight rod.

[0012] Preferably, the spring fixing plate is provided with a first cylinder facing the direction of the spring, and the push rod is provided with a second cylinder at the position of the through slot facing the second boss, the first cylinder and the second cylinder extend into both ends of the spring, and a downward limit block perpendicular to the direction of the spring is provided above the through slot on the upper cover, and an arc-shaped notch is also provided at the center of the bottom of the limit block, and the two sides of the arc-shaped notch span the two sides of the through slot.

[0013] Preferably, contacts and straight handles are provided on the side of the micro switch, the contacts are switch components, the straight handle presses the contacts to close at a position perpendicular to the straight rod, the distal end of the straight handle contacts the switch opening and closing part of the push rod and generates a fault tripping signal under the action of the switch opening and closing part, a fixing hole is provided on the micro switch body, a second boss is provided on the base at a position corresponding to the fixing hole, and a first boss is provided on the upper cover at a position corresponding to the fixing hole, and the first boss and the second boss extend into the fixing hole.

[0014] Based on the same inventive concept, the present application also discloses a circuit breaker, comprising the above-mentioned fault tripping signal feedback device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention solves the problem that the actuator is difficult to implement when the trip signal in the prior art needs to be fed back to multiple locations by introducing the fault trip signal feedback device outside the actuator and using a unique transmission structure. It can easily implement more than three groups of fault trip signal feedback and can realize manual reset of the trip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a three-dimensional structural diagram of an embodiment of a fault tripping signal feedback module of the present application installed on an actuator;

[0017] Figure 2 This is a three-dimensional structural diagram of an embodiment of a fault tripping signal feedback module of the present application;

[0018] Figure 3 This is a schematic diagram of the internal structure of an embodiment of a fault tripping signal feedback module of the present application;

[0019] Figure 4 A schematic top view of an embodiment of a micro switch of the present application;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of an embodiment of a push rod of the present application;

[0021] Figure 6 This is a schematic diagram of the three-dimensional structure of an embodiment of a base of the present application;

[0022] Figure 7 This is a schematic diagram of the three-dimensional structure of an embodiment of the upper cover of the present application;

[0023] Figure 8 This is a schematic diagram of the internal structure of an actuator in which an embodiment of a fault trip signal feedback module of the present application is installed on the actuator;

[0024] Among them, 1-actuator, 11-fault trip signal feedback module, 111-upper cover, 1111-first boss, 1112-limit block, 112-base, 1121-second boss, 1122-first cylinder, 113-push rod, 1131-straight rod, 1132-cantilever, 1133-second cylinder, 114-micro switch, 1141-straight handle, 1142-normally open point, 1143-normally closed point, 1144-common point, 115-spring, 12-lever, 2-wire, 3-secondary terminal. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0026] The present embodiment provides a fault trip signal feedback device, which is installed in a circuit breaker and includes an actuator 1 and a fault trip signal feedback module 11. The main body of the fault trip signal feedback module 11 is installed outside the actuator 1. The actuator 1 is connected to a wire 2 through the fault trip signal feedback module 11 and is finally electrically connected to a signal receiving device in a controller. The actuator 1 transmits mechanical motion to the fault trip signal feedback module 11 and the fault trip signal feedback module 11 generates a fault trip signal and transmits it to the signal receiving device in the controller.

[0027] In this embodiment, the fault tripping signal feedback module 11 is connected to the secondary terminal 3 using a connecting wire 2 and then connected to a signal receiving device in the controller.

[0028] The fault tripping signal feedback module 11 includes an upper cover 111 and a base 112. The base 112 is mounted on the top of the actuator 1. The upper cover 111 is mounted on the base 112. The upper cover 111 and the base 112 can be connected and fixed in a suitable manner, such as screw fixation or buckle fixation. In this embodiment, the upper part of the base 112 is provided with a buckle with a transition slope on the upper part of the protrusion, and the corresponding part of the upper cover 111 is opened. The upper cover 111 can be buckled down in the buckle on the side of the base 112 for easy installation. The base 112 is fixedly connected to the top of the actuator 1 by screws. There is an upward protrusion on the top of the actuator 1. The base 112 can be fixed to the top of the actuator 1 from the side by screws. After the upper cover 111 and the base 112 are installed, there is still a gap between the upper cover 111 and the base 112 for connecting the wire 2 and extending the push rod 2.

[0029] The actuator 1 includes a lever 12, and the fault trip signal feedback module 11 also includes a push rod 113, a micro switch 114 and a spring 115. The micro switch 114 and the spring 115 are installed in the space formed by the upper cover 111 and the base 112. The wire 2 is connected to the pin of the micro switch 114. The push rod 113 includes a guide reset part, a switch opening and closing part and a motion conduction part. The guide reset part and the switch opening and closing part are all located in the space formed by the upper cover 111 and the base 112. One end of the motion conduction part extends into the space formed by the upper cover 111 and the base 112, and the other end extends into the actuator 1 and contacts and links with the moving part of the lever 12.

[0030] The pins of the micro switch 114 of this embodiment include a normally open point 1142, a normally closed point 1143 and a common point 1144. This embodiment uses the normally open point 1142 and the common point 1144 to connect the wire 2 for transmitting the trip fault signal.

[0031] The moving part of the lever 12 is at its top, and the lever 12 rotates around its axis. The motion transmission part of the push rod 113 includes a straight rod 1131. One end of the straight rod 1131 extends into the actuator 1 and contacts the top of the lever 12 and is linked to the top of the lever 12. The straight rod 1131 is perpendicular to the normal direction of movement of the top of the lever 12, and a through hole is opened in the outer shell of the actuator 1 at the position where the straight rod 1131 passes through the outer shell.

[0032] The motion transmission part of the push rod 113 also includes a cantilever 1132, and the cantilever 1132 of the push rod 113 is connected through its switch opening and closing part and the guide reset part. The cantilever 1132 is located outside the actuator 1, the upper cover 111, and the base 112. The guide reset part is generally parallel to the straight rod 1131. One end of the straight rod 1131 extending into the actuator 1 is located on the same side of the cantilever 1132 as the guide reset part and the switch opening and closing part of the push rod 113.

[0033] A through slot for installing a spring 115 is provided in the middle of the guide and reset portion of the push rod 113, and a spring fixing plate is provided on the base 112, which is upward and perpendicular to the straight handle 1141, and the spring fixing plate extends into the through slot. The installation direction of the spring 115 is parallel to the straight handle 1141, and the push rod 113 is pushed or reset by the lever 12 along the direction of the straight rod 1131. A first cylinder 1122 is provided on the spring fixing plate facing the direction of the spring 115, and a second cylinder 1133 is provided at the position of the through slot of the push rod 113 facing the second boss 1121. The first cylinder 1122 and the second cylinder 1133 extend into both ends of the spring 115, and the two cylinders are used to limit the spring 115, and a limit block 1112 is provided downward and perpendicular to the direction of the spring 115 at the position above the through slot on the upper cover 111, and an arc-shaped notch is also provided in the center of the bottom of the limit block 1112, and the two sides of the arc-shaped notch span the two sides of the through slot and leave a gap with the push rod 113. In this embodiment, the push rod 113 in the fault trip signal feedback module 11 is limited by the upper cover 111 and the base 112, and can only move forward and backward. The straight rod 1131 is also provided with an extension section on the other side of the cantilever extending into the actuator 1, so that the lever 12 can be manually reset on the outside of the actuator 1 using this device.

[0034] A contact and a straight handle 1141 are provided on the side of the micro switch 114, wherein the contact is a switch component, and the position where the straight handle 1141 presses the contact to close is perpendicular to the straight rod 1131, and the distal end of the straight handle 1141 contacts the switch opening and closing part of the push rod 113 and generates a fault tripping signal under the action of the switch opening and closing part, and a fixing hole is provided on the body of the micro switch 114, and a second boss 1121 is provided on the base 112 at a position corresponding to the fixing hole, and a first boss 1111 is provided on the upper cover 111 at a position corresponding to the fixing hole, and the first boss 1111 and the second boss 1121 extend into the fixing hole, and the two bosses are used to limit the micro switch 114, and the cantilever 1132 of the push rod 113 pushes the straight handle 1141 of the micro switch 114 to switch the contact on the side of the micro switch and output a signal. The root of the first boss 1111 of the upper cover 111 is also provided with a protruding reinforcing rib, so that the first boss 1111 and its reinforcing rib can be used to limit the micro switch 114 in both horizontal and vertical directions, and the limit block 1112 can be used to limit the push rod and the limit spring 115. When the fault trip signal needs to be expanded, such as one for feedback to the user, one for remote reset, and one for controller self-diagnosis monitoring, multiple micro switches 114 can be stacked vertically, and the first boss 1111 or the second boss 1121 can be extended accordingly, and the switch opening and closing part of the push rod 113 is also extended in the vertical direction, so that multiple micro switches 114 can output the required signals at the same time.

[0035] When the circuit breaker detects a line fault, the actuator 1 is activated. The lever 12 in the actuator 1 rotates, causing the push rod 113 to move forward of the actuator 1, and the side contact of the micro switch 114 switches, outputting a signal to the secondary terminal 3 and then to the controller.

[0036] When the line fault is removed, the push rod 113 is pushed in the opposite direction to reset the lever 12; at the same time, the push rod 113 is reset under the action of the spring 115, and the side contact of the micro switch 114 is switched to disconnect the signal output.

[0037] Based on the same inventive concept, the present application also discloses a circuit breaker, including the above-mentioned fault trip signal feedback device. The circuit breaker is generally a frame circuit breaker, and is also equipped with a controller. The controller is arranged outside the frame short circuit breaker. The fault trip signal feedback module of the fault trip signal feedback device generates a fault trip signal and transmits it to the signal receiving device in the controller.

[0038] In the description of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", etc. appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] The above is only a preferred specific implementation method of the present scheme, but the protection scope required by the present scheme is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present scheme according to the technical scheme and the inventive concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A fault tripping signal feedback device, installed in a circuit breaker, comprising an actuator (1) and a fault tripping signal feedback module (11), wherein: The main body of the fault tripping signal feedback module (11) is installed outside the actuator (1); the actuator (1) is connected to the signal receiving device in the controller through the fault tripping signal feedback module (11) connecting wire (2); the actuator (1) transmits mechanical movement to the fault tripping signal feedback module (11), and the fault tripping signal feedback module (11) generates a fault tripping signal and transmits it to the signal receiving device in the controller.

2. The fault tripping signal feedback device according to claim 1, characterized in that: The fault tripping signal feedback module (11) is connected to the secondary terminal (3) using a connecting wire (2) and then connected to a signal receiving device in the controller.

3. The fault tripping signal feedback device according to claim 1, characterized in that: The fault trip signal feedback module (11) comprises an upper cover (111) and a base (112); the base (112) is mounted on the top of the actuator (1), and the upper cover (111) is mounted on the base (112).

4. The fault tripping signal feedback device according to claim 3, characterized in that: The actuator (1) includes a lever (12), and the fault trip signal feedback module (11) further includes a push rod (113), a micro switch (114) and a spring (115). The micro switch (114) and the spring (115) are installed in a space formed by the upper cover (111) and the base (112). The wire (2) is connected to the pin of the micro switch (114). The push rod (113) includes a guide reset portion, a switch opening and closing portion and a motion conduction portion. The guide reset portion and the switch opening and closing portion are both located in the space formed by the upper cover (111) and the base (112). One end of the motion conduction portion extends into the space formed by the upper cover (111) and the base (112), and the other end extends into the actuator (1) and contacts and links with the motion portion of the lever (12).

5. The fault tripping signal feedback device according to claim 4, characterized in that: The moving part of the lever (12) is at its top, and the lever (12) rotates around its axis. The motion transmission part of the push rod (113) includes a straight rod (1131). One end of the straight rod (1131) extends into the actuator (1) and contacts the top of the lever (12) and moves in conjunction with the top of the lever (12). The straight rod (1131) is perpendicular to the normal direction of movement of the top of the lever (12). The outer shell of the actuator (1) is provided with a through hole at the position where the straight rod (1131) passes through the outer shell.

6. The fault tripping signal feedback device according to claim 5, characterized in that: The motion transmission portion of the push rod (113) further comprises a cantilever (1132), the cantilever (1132) of the push rod (113) being connected via its switch opening and closing portion and guide reset portion, the cantilever (1132) being located outside the actuator (1), the upper cover (111) and the base (112), the guide reset portion being generally parallel to the straight rod (1131), and one end of the straight rod (1131) extending into the actuator (1) being located on the same side of the cantilever (1132) as the guide reset portion and the switch opening and closing portion of the push rod (113).

7. The fault tripping signal feedback device according to claim 6, characterized in that: A through slot for installing a spring (115) is provided in the middle of the guide reset portion of the push rod (113); a spring fixing plate is provided on the base (112) and is upwardly perpendicular to the straight handle (1141); the spring fixing plate extends into the through slot; the spring (115) is installed in a direction parallel to the straight handle (1141); and the push rod (113) is pushed or reset by the lever (12) along the direction of the straight rod (1131).

8. The fault tripping signal feedback device according to claim 7, characterized in that: The spring fixing plate is provided with a first cylinder (1122) facing the direction of the spring (115); a second cylinder (1133) is provided at a position of the through slot of the push rod (113) facing the second boss (1121); the first cylinder (1122) and the second cylinder (1133) extend into two ends of the spring (115); a downward limit block (1112) perpendicular to the direction of the spring (115) is provided above the through slot on the upper cover (111); an arc-shaped notch is provided at the center of the bottom of the limit block (1112); two sides of the arc-shaped notch straddle two sides of the through slot.

9. The fault tripping signal feedback device according to claim 4, characterized in that: A contact and a straight handle (1141) are provided on the side of the micro switch (114); the contact is a switch component; the position where the straight handle (1141) presses the contact to close is perpendicular to the straight rod (1131); the distal end of the straight handle (1141) contacts the switch opening and closing portion of the push rod (113) and generates a fault trip signal under the action of the switch opening and closing portion; a fixing hole is provided on the body of the micro switch (114); a second boss (1121) is provided on the base (112) at a position corresponding to the fixing hole; and a first boss (1111) is provided on the upper cover (111) at a position corresponding to the fixing hole; the first boss (1111) and the second boss (1121) extend into the fixing hole.

10. A circuit breaker, characterized in that: It comprises the fault tripping signal feedback device as described in any one of claims 1-9.

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