Circuit breaker opening and closing detection device and circuit breaker

Abstract

The present invention discloses a circuit breaker opening and closing detection device and a circuit breaker, comprising a controller and a light control component, wherein the light control component comprises a light emitting circuit and a light receiving circuit, when a movable rod is in a first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is in a second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit; the output end of the controller is connected to the input end of the light emitting circuit, and the input end is connected to the output end of the light receiving circuit, for sending a pulse drive signal of a preset frequency to the light emitting circuit, receiving a detection signal fed back by the light receiving circuit, and generating a circuit breaker opening and closing detection result according to the detection signal. When the technical solution detects the opening and closing of the circuit breaker, by transmitting and receiving a pulse drive signal of a preset frequency, the influence of other interference signals on the result is effectively prevented, thereby solving the problem that the electric spark generated during the opening and closing of the circuit breaker easily causes the detection device to cause misjudgment.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker opening and closing detection device and a circuit breaker. Background Art

[0002] After long-term use, the circuit breaker will have a decrease in spring energy storage and an increase in mechanical movement resistance due to environmental influences, reduced lubrication performance, and self-aging. This may result in the switch connecting rod being unable to pass the dead point when the circuit breaker is closed. At this time, although the circuit breaker is in a closed state, the connecting rod mechanism has not passed the dead point. When the main contacts are subjected to a large electric force, the main contacts will push the connecting rod mechanism to move in the opposite direction, causing insufficient contact force of the main contacts and resulting in burning when a large current is flowing.

[0003] Existing devices or structures for detecting the opening and closing of circuit breakers usually use micro switches as signal collection elements. Since the spring sheets of the micro switches have the problem of mechanical wear, deformation and failure, they cannot timely and accurately reflect the opening and closing status of the circuit breaker. A few circuit breakers use photoelectric switches as signal collection elements, but sparks will be generated when the circuit breaker is closed under load, and arcing will occur between the contacts when the circuit breaker is opened, emitting arc light, which can easily cause misjudgment of the photoelectric switch. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a circuit breaker opening and closing detection device and a circuit breaker to solve the problem that electric sparks may easily cause misjudgment of the detection device when detecting the opening and closing of the circuit breaker.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] An embodiment of the present invention provides a circuit breaker opening and closing detection device, which is applied to a movable rod of a circuit breaker, wherein the movable rod is in a first position when the circuit breaker is opened or closed, and is in a second position when the circuit breaker is closed or opened. The circuit breaker opening and closing detection device includes: a controller and a light control component, wherein:

[0007] The light control assembly includes a light emitting circuit and a light receiving circuit. When the movable rod is in the first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is in the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit.

[0008] The output end of the controller is connected to the input end of the light emitting circuit, and the input end is connected to the output end of the light receiving circuit, and is used to send a pulse drive signal of a preset frequency to the light emitting circuit, receive a detection signal fed back by the light receiving circuit, and generate a circuit breaker opening and closing detection result according to the detection signal.

[0009] Optionally, the circuit breaker opening and closing detection device also includes a judgment module, a first input end of the judgment module is connected to the input end of the light emitting circuit, a second input end is connected to the light receiving circuit, and an output end is connected to the controller. The judgment module compares the detection signal fed back by the light receiving circuit with the pulse driving signal of a preset frequency, generates a judgment signal and sends it to the controller.

[0010] Optionally, the judgment module is a comparator.

[0011] Optionally, the circuit breaker opening and closing detection device further includes: an alarm module, the alarm module is connected to the controller, and the controller is further used to generate an alarm control signal according to the received judgment signal, and control the alarm module to alarm through the alarm control signal.

[0012] Optionally, the circuit breaker opening and closing detection device further includes: a communication module, a first end of the communication module is connected to the controller, and a second end is connected to the terminal device via an antenna, and the controller sends the circuit breaker opening and closing detection result to the terminal device via the communication module.

[0013] Optionally, the light emitting circuit includes a first resistor, a second resistor, a light emitting diode and a controlled switch, wherein the first end of the first resistor is connected to the controller, and the second end is connected to the control end of the controlled switch; the first end of the second resistor is connected to the power supply VCC, and the second end is connected to the control end of the controlled switch; the positive pole of the light emitting diode is connected to the power supply VCC, and the negative pole is connected to the first output end of the controlled switch; the second output end of the controlled switch is grounded GND.

[0014] Optionally, the optical receiving circuit includes a third resistor, a fourth resistor, a fifth resistor and a phototransistor, wherein the first end of the third resistor is connected to the controller, and the second end is connected to the collector of the phototransistor; the first end of the fourth resistor is connected to the power supply VCC, and the second end is connected to the collector of the phototransistor; the base of the phototransistor is grounded GND through the fifth resistor.

[0015] The embodiment of the present invention further provides a circuit breaker, comprising: a movable rod, and a circuit breaker opening and closing detection device provided by another embodiment of the present invention, wherein:

[0016] The movable rod is in a first position when the circuit breaker is opened or closed, and is in a second position when the circuit breaker is closed or opened.

[0017] Optionally, the circuit breaker further includes: a partition and a driving device arranged inside the circuit breaker, the partition being provided with a movable groove, the movable rod being movably arranged in the movable groove, the bottom of the movable rod being connected to the driving device, and the driving device being connected to the controller for driving the movable rod to switch positions.

[0018] Optionally, the circuit breaker further includes a spring, and the top end of the movable rod is connected to the partition through the spring. When the circuit breaker is opened or closed, the movable rod drives the spring to undergo elastic deformation.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. An embodiment of the present invention provides a circuit breaker opening and closing detection device, which is applied to a movable rod of a circuit breaker, the movable rod is in a first position when the circuit breaker is opened or closed, and is in a second position when the circuit breaker is closed or opened, and the circuit breaker opening and closing detection device comprises: a controller and a light control component, wherein the light control component comprises a light emitting circuit and a light receiving circuit, when the movable rod is in the first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is in the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit; the output end of the controller is connected to the input end of the light emitting circuit, and the input end is connected to the output end of the light receiving circuit, for sending a pulse drive signal of a preset frequency to the light emitting circuit, receiving a detection signal fed back by the light receiving circuit, and generating a circuit breaker opening and closing detection result according to the detection signal. When detecting the opening and closing of a circuit breaker, this technical solution effectively prevents the influence of other interference signals on the results by transmitting and receiving pulse drive signals of a preset frequency, thereby solving the problem that sparks and arc lights generated during opening and closing can easily cause misjudgment of the detection device; this solution does not rely on the coordination of other signals, and can intuitively reflect the physical opening and closing status of the circuit breaker; there is no need to change the structure of the original circuit breaker; detection is carried out through the principle of light control, and the detection results are safe and reliable.

[0021] 2. An embodiment of the present invention provides a circuit breaker, on which the circuit breaker opening and closing detection device described in another embodiment of the present invention is arranged. When detecting the opening and closing of the circuit breaker, by transmitting and receiving a pulse drive signal of a preset frequency, the influence of other interference signals on the result can be effectively prevented, thereby solving the problem that the sparks and arc light generated during opening and closing can easily cause the detection device to make misjudgments; this solution does not rely on the cooperation of other signals, and can intuitively reflect the physical opening and closing state of the circuit breaker; there is no need to change the structure of the original circuit breaker; detection is carried out through the principle of light control, the detection result is safe and reliable, the component installation is simple and convenient, and the opening and closing self-test function is realized through the opening and closing detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a circuit breaker opening and closing detection device in an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the movable rod in the first position according to an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the movable rod in the second position according to an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the circuit structure of the light control component in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of a circuit breaker in an embodiment of the present invention;

[0028] Figure 6 It is a partial structural schematic diagram of a circuit breaker in an embodiment of the present invention.

[0029] In the figure:

[0030] 1-controller, 2-light emitting circuit, 3-light receiving circuit, 4-judgment module, 5-communication module, 6-alarm module, 7-movable rod, 8-light control component, 9-spring, 10-extension plate, 11-partition plate, 12-movable groove, 13-fixed plate, 14-baffle, 15-circuit breaker opening and closing detection device. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] In this embodiment, a circuit breaker opening and closing detection device is provided. Figure 1-3As shown, a movable rod 7 is applied to a circuit breaker, the movable rod 7 is in a first position when the circuit breaker is opened or closed, and is in a second position when the circuit breaker is closed or opened, and the device for detecting the opening and closing of the circuit breaker includes: a controller 1 and a light control component 8, wherein the light control component 8 includes a light emitting circuit 2 and a light receiving circuit 3, when the movable rod 7 is in the first position, the light path of the light emitting circuit 2 relative to the light receiving circuit 3 is in a cut-off state; when the movable rod 7 is in the second position, the light path of the light emitting circuit 2 relative to the light receiving circuit 3 is in a conducting state; the output end of the controller 1 is connected to the input end of the light emitting circuit 2, and the input end is connected to the output end of the light receiving circuit 3, for sending a pulse drive signal of a preset frequency to the light emitting circuit 2, receiving a detection signal fed back by the light receiving circuit 3, and generating a circuit breaker opening and closing detection result according to the detection signal.

[0033] Specifically, the movable rod 7 has two position states when it is in the closing state and the opening state. The light control component 8 can be set at the two side positions when the movable rod 7 is in the closing state, and can also be set at the two side positions when the movable rod 7 is in the opening state. When the movable rod 7 switches its state, its position changes, and the blocking state of the light path changes accordingly, thereby affecting the reception of the light signal by the light receiving circuit 3, and the feedback detection signal also changes accordingly.

[0034] Specifically, since the pulse drive signal emitted by the controller 1 to the optical transmitting circuit 2 is a preset frequency, the optical receiving circuit 3 feeds back the corresponding detection signal, sparks will be generated when the circuit breaker is closed under load, and arcing will occur between the contacts when the circuit breaker is opened, and arc light will be emitted. Sparks and arc light are prone to interference. This solution adopts a pulse drive signal with a preset frequency. By comparing whether the frequency of the detection signal is consistent with that of the pulse drive signal, the opening and closing state can be accurately judged, which plays an anti-interference role. Even if sparks and arc light appear, they will not affect the detection results. In addition, the circuit breaker opening and closing detection device provided by the embodiment of the present invention does not rely on the cooperation of other signals, and can intuitively reflect the physical opening and closing state of the circuit breaker; there is no need to change the structure of the original circuit breaker; the detection is carried out through the principle of light control, and the detection results are safe and reliable, and the component installation is simple and convenient.

[0035] Specifically, the controller 1 here can be the controller 1 in the circuit breaker body, or can be a separate chip such as a single-chip microcomputer, a PLC controller, etc. that can play a control role to achieve the control purpose.

[0036] In one embodiment, if Figure 1As shown, the above-mentioned circuit breaker opening and closing detection device also includes a judgment module 4, a first input end of the judgment module 4 is connected to the input end of the light emitting circuit 2, a second input end is connected to the light receiving circuit 3, and an output end is connected to the controller 1. The judgment module 4 compares the detection signal fed back by the light receiving circuit 3 with the pulse driving signal of a preset frequency, generates a judgment signal and sends it to the controller 1.

[0037] Specifically, when the movable rod 7 cuts off the light path, the light receiving circuit 3 cannot receive the light signal from the light transmitting circuit 2, and the light receiving circuit 3 continues to output a stable low-level signal to indicate the state of the circuit breaker; when the movable rod 7 does not cut off the light path, the light receiving circuit 3 receives the light signal emitted by the light transmitting circuit 2 at a preset frequency, and then feeds back a detection signal of a frequency corresponding thereto; when receiving the detection signal fed back by the light receiving circuit 3, the judgment module 4 compares the detection signal with the pulse driving signal of the preset frequency, and outputs a judgment signal to the controller 1; when the detection signal is consistent with the pulse driving signal, it indicates that the light path is in the on state, and the movable rod 7 is in a position that does not block the light path; when the detection signal is inconsistent with the pulse driving signal, it indicates that the light path is in the off state, and the movable rod 7 is in a position that blocks the light path.

[0038] In one embodiment, the judgment module 4 is a comparator. Specifically, the judgment module 4 can also be other types of comparison circuits in the prior art or other electronic devices that can compare signals, and the present invention is not limited thereto.

[0039] In one embodiment, the above-mentioned circuit breaker opening and closing detection device further includes: an alarm module 6, the alarm module 6 is connected to the controller 1, and the controller 1 is also used to generate an alarm control signal according to the received judgment signal, and control the alarm module 6 to alarm through the alarm control signal. Specifically, the circuit breaker can be preset in state, and when the received judgment signal does not match the preset state, the controller 1 generates an alarm control signal to control the alarm module 6 to alarm; the alarm module 6 here can be a device that can emit an alarm sound, such as a buzzer, a loudspeaker, etc., and the present invention is not limited thereto.

[0040] In one embodiment, the above-mentioned circuit breaker opening and closing detection device further includes: a communication module 5, a first end of the communication module 5 is connected to the controller 1, and a second end is connected to the terminal device through an antenna, and the controller 1 sends the circuit breaker opening and closing detection result to the terminal device through the communication module 5. Specifically, the controller 1 transmits the circuit breaker opening and closing detection result to the user terminal through the communication module 5, establishes communication between the user terminal and the circuit breaker, and can monitor the circuit breaker remotely, and can observe the circuit breaker status in real time.

[0041] In one embodiment, if Figure 4As shown, the above-mentioned light emitting circuit 2 includes a first resistor, a second resistor, a light emitting diode and a controlled switch, wherein the first end of the first resistor is connected to the controller 1, and the second end is connected to the control end of the controlled switch; the first end of the second resistor is connected to the power supply VCC, and the second end is connected to the control end of the controlled switch; the positive electrode of the light emitting diode is connected to the power supply VCC, and the negative electrode is connected to the first output end of the controlled switch; the second output end of the controlled switch is grounded GND. Specifically, the controller 1 transmits a pulse drive signal of a preset frequency to the light emitting circuit 2, driving the light emitting diode to emit light at a preset frequency.

[0042] In one embodiment, if Figure 4 As shown, the above-mentioned light receiving circuit 3 includes a third resistor, a fourth resistor, a fifth resistor and a phototransistor, wherein the first end of the third resistor is connected to the controller 1, and the second end is connected to the collector of the phototransistor; the first end of the fourth resistor is connected to the power supply VCC, and the second end is connected to the collector of the phototransistor; the base of the phototransistor is grounded GND through the fifth resistor. Specifically, when the movable rod 7 is in a position where it does not block the light path, the light receiving circuit 3 receives the light signal of a specific frequency emitted by the light emitting diode through the phototransistor, and converts it into an electrical signal of a specific frequency for feedback.

[0043] The embodiment of the present invention further provides a circuit breaker, such as Figure 5 As shown, the circuit breaker comprises: a movable rod 7, and a circuit breaker opening and closing detection device 15 provided by another embodiment of the present invention, wherein:

[0044] The movable rod 7 is in the first position when the circuit breaker is opened or closed, and is in the second position when the circuit breaker is closed or opened.

[0045] Specifically, the movable rod 7 is in different positions when the circuit breaker is opened or closed, and the light control component 8 can be set in the first position or the second position. As long as the movable rod 7 can block the light path of the light control component 8 in one of the positions after completing the position switching, the purpose is to block the transmission of the optical signal by blocking the light path, so that the light control component 8 can feedback different information to indicate the opening or closing state of the circuit breaker.

[0046] Specifically, when detecting the opening and closing of a circuit breaker, by transmitting and receiving a pulse drive signal of a preset frequency, the influence of other interference signals on the results can be effectively prevented, thereby solving the problem that sparks and arc lights generated during opening and closing can easily cause misjudgment of the detection device; this solution does not rely on the cooperation of other signals, and can intuitively reflect the physical opening and closing status of the circuit breaker; there is no need to change the structure of the original circuit breaker; detection is carried out through the principle of light control, the detection results are safe and reliable, the component installation is simple and convenient, and the opening and closing self-test function is realized through the opening and closing detection device.

[0047] In one embodiment, if Figure 6 As shown, the above-mentioned circuit breaker also includes: a partition 11 and a driving device ( Figure 6 (not shown in the figure), a movable groove 12 is provided on the partition 11, and the movable rod 7 is movably arranged in the movable groove 12. The bottom of the movable rod 7 is connected to the driving device, and the driving device is connected to the controller 1 to drive the movable rod 7 to switch positions. Specifically, when the circuit breaker is opened or closed, the controller 1 controls the driving device to drive the movable rod 7 to switch positions, which can not only intuitively indicate the opening and closing status of the circuit breaker, but also can drive the movable rod 7 to switch positions to block the light control component 8, so that the light control component 8 can feedback detection information.

[0048] In one embodiment, the circuit breaker further comprises a spring 9, the top end of the movable rod 7 is connected to the partition through the spring 9, and the movable rod 7 drives the spring 9 to undergo elastic deformation when the circuit breaker is opened or closed. Specifically, in order to prevent the movable rod 7 from failing to reach the expected position when switching positions when closing after opening due to aging of the device during use, thereby affecting the blocking of the light path and causing misjudgment, the spring 9 can assist the movable rod 7 in moving and extend the service life of the device.

[0049] In one embodiment, the circuit breaker further includes a detection button, which is connected to the controller 1. The detection button includes a timing detection button and a real-time detection button, which are used to select a detection mode. Specifically, the timing detection button and the real-time detection button can enable the controller 1 to send a pulse drive signal of a preset frequency at a fixed time or in real time, and perform real-time detection or timing detection on the circuit breaker according to user needs. The timing detection and real-time detection can be realized by a timer and a trigger device, which belongs to the application of the prior art here and will not be described in detail.

[0050] In one embodiment, an extension plate 10 is provided at the top of the above-mentioned movable rod 7, and a hook is provided at the end of the extension plate 10 connected to the spring 9, and the hook is fixedly connected to one end of the spring 9. Specifically, by providing the extension plate 10, the distance between the top of the movable rod 7 and the connecting end of the spring 9 is increased, and when the movable rod 7 switches positions, the movable angle of the spring 9 is reduced, which alleviates the problem of easy breakage of the connection caused by a large movable angle and a large pulling force.

[0051] In one embodiment, the circuit breaker further comprises a fixing plate 13, the fixing plate 13 is fixedly connected to the partition, a fixing ring is provided at one end of the fixing plate 13, one end of the spring 9 is connected to the movable rod 7, and the other end is connected to the fixing ring. Specifically, by providing a hook and a fixing ring, the spring 9 is detachably connected to the circuit breaker, and the spring 9 can be replaced regularly, which reduces the difficulty of operation and facilitates regular maintenance.

[0052] In one embodiment, a baffle 14 is fixed on the fixed plate at a position directly opposite to the movable rod 7. Specifically, the baffle 14 is used to limit the position of the movable rod 7, and a buffer pad can also be provided at the baffle 14 to provide a buffering protection for the movable rod 7.

[0053] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A circuit breaker opening and closing detection device, applied to a movable rod of a circuit breaker, wherein the movable rod is in a first position when the circuit breaker is opened or closed, and is in a second position when the circuit breaker is closed or opened, characterized in that: The circuit breaker opening and closing detection device comprises: a controller and a light control component, wherein: The light control assembly includes a light emitting circuit and a light receiving circuit. When the movable rod is in the first position, the light emitting circuit is in a cut-off state relative to the light path of the light receiving circuit; when the movable rod is in the second position, the light emitting circuit is in a conducting state relative to the light path of the light receiving circuit. The output end of the controller is connected to the input end of the light emitting circuit, and the input end is connected to the output end of the light receiving circuit, and is used to send a pulse drive signal of a preset frequency to the light emitting circuit, receive a detection signal fed back by the light receiving circuit, and generate a circuit breaker opening and closing detection result according to the detection signal, and judge the opening and closing state by comparing whether the frequency of the detection signal is consistent with that of the pulse drive signal.

2. The circuit breaker opening and closing detection device according to claim 1, characterized in that: It also includes a judgment module, a first input end of the judgment module is connected to the input end of the optical transmitting circuit, a second input end is connected to the optical receiving circuit, and an output end is connected to the controller. The judgment module compares the detection signal fed back by the optical receiving circuit with the pulse driving signal of a preset frequency, generates a judgment signal and sends it to the controller.

3. The circuit breaker opening and closing detection device according to claim 2, characterized in that: The judgment module is a comparator.

4. The circuit breaker opening and closing detection device according to claim 2, characterized in that: Also includes: The alarm module is connected to the controller, and the controller is also used to generate an alarm control signal according to the received judgment signal, and control the alarm module to alarm through the alarm control signal.

5. The circuit breaker opening and closing detection device according to claim 1, characterized in that: Also includes: A communication module, wherein a first end of the communication module is connected to the controller, and a second end of the communication module is connected to the terminal device via an antenna. The controller sends the circuit breaker opening and closing detection result to the terminal device via the communication module.

6. The circuit breaker opening and closing detection device according to claim 1, characterized in that: The light emitting circuit includes a first resistor, a second resistor, a light emitting diode and a controlled switch, wherein the first end of the first resistor is connected to the controller, and the second end is connected to the control end of the controlled switch; the first end of the second resistor is connected to the power supply VCC, and the second end is connected to the control end of the controlled switch; the positive electrode of the light emitting diode is connected to the power supply VCC, and the negative electrode is connected to the first output end of the controlled switch; the second output end of the controlled switch is grounded GND.

7. The circuit breaker opening and closing detection device according to claim 1, characterized in that: The optical receiving circuit includes a third resistor, a fourth resistor, a fifth resistor and a phototransistor, wherein a first end of the third resistor is connected to the controller, and a second end is connected to the collector of the phototransistor; a first end of the fourth resistor is connected to the power supply VCC, and a second end is connected to the collector of the phototransistor; and the base of the phototransistor is grounded GND through the fifth resistor.

8. A circuit breaker, characterized in that: include: A movable rod, and a circuit breaker opening and closing detection device as claimed in any one of claims 1 to 7, wherein: The movable rod is in a first position when the circuit breaker is opened or closed, and is in a second position when the circuit breaker is closed or opened.

9. The circuit breaker according to claim 8, characterized in that Also includes: A partition and a driving device are arranged inside the circuit breaker, wherein a movable groove is opened on the partition, and the movable rod is movably arranged in the movable groove. The bottom of the movable rod is connected to the driving device, and the driving device is connected to the controller for driving the movable rod to switch positions.

10. The circuit breaker according to claim 9, characterized in that It also includes a spring, the top end of the movable rod is connected to the partition through the spring, and the movable rod drives the spring to undergo elastic deformation when the circuit breaker is opened or closed.

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