CN212111685U - State monitoring device of switch device and switch device - Google Patents
State monitoring device of switch device and switch device Download PDFInfo
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- CN212111685U CN212111685U CN202020639802.8U CN202020639802U CN212111685U CN 212111685 U CN212111685 U CN 212111685U CN 202020639802 U CN202020639802 U CN 202020639802U CN 212111685 U CN212111685 U CN 212111685U
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Abstract
The utility model discloses a state monitoring device of a switch device, which drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; the state monitoring device includes: the electric signal detection unit is used for obtaining the starting moment of the driving action by detecting the control electric signal of the electromagnetic driving mechanism; the position detection unit is used for detecting the position state of the switching device to obtain a first time when the switching device reaches a preset first position and/or a second time when the switching device reaches a preset second position, and the switching device is in an open state and a closed state at the first position and the second position respectively; and the processing unit is used for forming the time period between the above moments. The utility model also discloses a switching device. The utility model discloses can carry out real-time effectual monitoring to switching device's operating condition.
Description
Technical Field
The utility model relates to a switching device especially relates to a switching device's state monitoring device.
Background
At present, most of frame circuit breakers are air circuit breakers, an operating mechanism of the circuit breaker adopts a spring energy storage type, a set of relatively complex mechanical structure is used for operating a main contact to carry out switching-on and switching-off motions, and when the contact motion speed of the circuit breaker in switching-on and switching-off motions is slowed down due to reasons such as lubrication, abrasion and blocking in the using process of the mechanical structure, the performance of the circuit breaker can be caused to be poor or degraded, and the requirements of use and protection cannot be met.
The existing frame circuit breaker is not provided with a function of monitoring the motion characteristic of the circuit breaker during switching on and switching off, whether the working state of the circuit breaker is normal or not can not be known in time during daily operation of the circuit breaker, if the circuit breaker cannot give out warning in time when switching on and switching off are abnormal, the circuit breaker is ill or degraded in performance to be used, or the circuit breaker cannot be maintained and replaced in time, the circuit breaker cannot be repaired or replaced until the circuit breaker is completely inoperable or fails, power supply interruption during maintenance and replacement of the circuit breaker can be caused inevitably, even when short-circuit current is broken, the short-circuit current cannot be broken due to the performance degradation of the circuit breaker, the fault caused by protection failure is enlarged, and greater economic loss is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art not enough, provide a switching device's state monitoring method, through the detection to several specific time interval of switching on and off in-process of switching device realize carrying out real-time effectual monitoring to switching device's operating condition to for further carrying out switching device's maintenance and fault diagnosis etc. provide the foundation.
The utility model discloses specifically adopt following technical scheme to solve above-mentioned technical problem:
a state monitoring method of a switch device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; the state monitoring method specifically comprises the following steps: the method comprises the steps that the driving action starting time is obtained by detecting a control electric signal of the electromagnetic driving mechanism, the first time when the switching device reaches a preset first position and/or the second time when the switching device reaches a preset second position is obtained by detecting the position state of the switching device, and the switching device is in an open state and a closed state at the first position and the second position respectively; the time period formed between the driving motion start time and the first time/the second time or at least one of three time periods formed between the driving motion start time, the first time and the second time is obtained.
Further, the method further comprises: the state of the switching device is obtained by comparing a time period formed between the driving motion start time and the first/second time with a preset reference time, or comparing at least one of three time periods formed between the driving motion start time, the first time, and the second time with a preset reference time.
Preferably, the states of the electromagnetic driving mechanism and the operating mechanism of the switching device are obtained by comparing the shorter two time periods of the three time periods formed among the driving action start time, the first time and the second time with preset reference times, respectively.
Preferably, the electromagnetic driving mechanism comprises a closing electromagnet and/or an opening electromagnet.
Preferably, the detection of the position state of the switching device is realized by two switches coupled with the position state of the switching device.
Further preferably, the two switches are micro switches or opto-electronic switches.
The following technical scheme can be obtained based on the same utility model concept:
a state monitoring device of a switch device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; the state monitoring device includes:
the electric signal detection unit is used for obtaining the starting moment of the driving action by detecting the control electric signal of the electromagnetic driving mechanism;
the position detection unit is used for detecting the position state of the switching device to obtain a first time when the switching device reaches a preset first position and/or a second time when the switching device reaches a preset second position, and the switching device is in an open state and a closed state at the first position and the second position respectively;
and the processing unit is used for obtaining a time period formed between the driving action starting time and the first time/the second time or at least one of three time periods formed between the driving action starting time, the first time and the second time.
Further, the processing unit may further obtain the state of the switching device by comparing a time period formed between the driving motion start time and the first/second time with a preset reference time, or comparing at least one of three time periods formed between the driving motion start time, the first time, and the second time with a preset reference time.
Preferably, the processing unit obtains the states of the electromagnetic driving mechanism and the operating mechanism of the switching device by comparing the shorter two time periods of the three time periods formed among the driving action start time, the first time and the second time with a preset reference time, respectively.
Preferably, the electromagnetic driving mechanism comprises a closing electromagnet and/or an opening electromagnet.
Preferably, the position detection unit detects the position state of the switching device through two switches coupled with the position state of the switching device.
Further preferably, the two switches are micro switches or opto-electronic switches.
A switching device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; the switching device is provided with the state monitoring device according to any one of the above technical schemes.
Compared with the prior art, the utility model discloses technical scheme has following beneficial effect:
the utility model discloses technical scheme detects through the time interval to switching device's closing and separating brake in-process several specific time and realizes carrying out real-time effectual monitoring to the operating condition of parts such as the whole and electromagnetic drive mechanism of switching device, operating device to provide the foundation for further carrying out switching device's maintenance and failure diagnosis etc..
The utility model discloses signal of telecommunication detecting element, position detecting element among the technical scheme can adopt current various simple ripe schemes, perhaps directly utilize realization such as the inherent brake closing detection part, current-voltage detection circuit among the switching device, therefore reliable and simple, realize low cost.
Drawings
Fig. 1 is a schematic block diagram of the structure of the switching device of the present invention;
FIG. 2 is a schematic diagram of the basic principle of the present invention;
fig. 3 and 4 are schematic structural diagrams of two embodiments of the position detection unit, respectively; wherein, 1 is a circuit breaker, 2 is a main shaft, 3 is a cantilever, 4 is a microswitch, 5 is a sliding sheet, and 6 is a photoelectric switch;
FIGS. 5 and 6 are schematic circuit diagrams of two embodiments of the electrical signal detection unit, respectively;
fig. 7 is a schematic view of a specific installation structure of the state monitoring device in the circuit breaker.
Detailed Description
The utility model discloses a solution thinking is through the detection to closing several specific time interval of switching device's switching-on and switching-off in-process and realizes carrying out real-time effectual monitoring to switching device's operating condition to for further carrying out switching device's maintenance and fault diagnosis etc. provide the basis.
Particularly, the utility model discloses a following technical scheme:
a state monitoring method of a switch device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; the state monitoring method specifically comprises the following steps: the method comprises the steps that the driving action starting time is obtained by detecting a control electric signal of the electromagnetic driving mechanism, the first time when the switching device reaches a preset first position and/or the second time when the switching device reaches a preset second position is obtained by detecting the position state of the switching device, and the switching device is in an open state and a closed state at the first position and the second position respectively; the time period formed between the driving motion start time and the first time/the second time or at least one of three time periods formed between the driving motion start time, the first time and the second time is obtained.
The time periods obtained by the scheme are closely related to the operation state of the switch device, the time period data can be locally displayed or transmitted to a remote end, and the operation condition of the switch device is analyzed and judged or further processed by an experienced operator according to the time periods; the state of the switching device may also be directly obtained by comparing a time period formed between the driving motion start time and the first/second time with a preset reference time, or comparing at least one of three time periods formed between the driving motion start time, the first time, and the second time with a preset reference time.
A state monitoring device of a switch device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; the state monitoring device includes:
the electric signal detection unit is used for obtaining the starting moment of the driving action by detecting the control electric signal of the electromagnetic driving mechanism;
the position detection unit is used for detecting the position state of the switching device to obtain a first time when the switching device reaches a preset first position and/or a second time when the switching device reaches a preset second position, and the switching device is in an open state and a closed state at the first position and the second position respectively;
and the processing unit is used for obtaining a time period formed between the driving action starting time and the first time/the second time or at least one of three time periods formed between the driving action starting time, the first time and the second time.
For the public understanding, the technical solution of the present invention is described in detail by a specific embodiment with reference to the attached drawings:
the circuit breaker shown in fig. 1 includes a main contact and an operating mechanism for controlling the main contact to perform switching on and off operations, and a switching-on electromagnet for driving the operating mechanism to perform switching-on operations and a switching-off electromagnet for driving the operating mechanism to perform switching-off operations are further installed in the circuit breaker. The opening electromagnet and the closing electromagnet can be voltage type electromagnets or current type electromagnets. When the circuit breaker is in a closing state, the control voltage U or the control current I is applied to the opening electromagnet, so that the circuit breaker can leave a closing position and then reach an opening position, and opening operation is achieved. When the circuit breaker is in an opening state, control voltage U or control current I is applied to the closing electromagnet, so that the circuit breaker can leave an opening position and then reach a closing position, and closing operation is achieved.
As shown in fig. 1, the circuit breaker is provided with a state monitoring device composed of a position detection unit, an electric signal detection unit and a processing unit; in the switching process from opening to closing of the circuit breaker, the position detection unit can detect and output a state signal when the circuit breaker reaches a certain preset position (namely the second position) in a closing state, and can also detect and output a signal when the circuit breaker reaches a certain preset position (namely the first position) in an opening state; the device can detect and output a state signal when the breaker reaches a first position in an opening state and can also detect and output a signal when the breaker reaches a second position in a closing state in the switching process of the breaker from closing to opening; the electric signal detection unit can detect control voltage or control current signals of the closing electromagnet and the opening electromagnet; the processing unit generates a state monitoring result of the circuit breaker according to the detection data of the electric signal detection unit and the position detection unit, and can display an alarm and/or output the processing result externally in a communication mode. The first position may be selected to be a position which is not reached and is located near the final opening position, and the second position may be selected to be a position which is not reached and is located at the final closing position.
The processing unit is internally provided with a group of reference time values, namely a time difference reference value tred1 from the starting time of the driving action of the closing electromagnet to the time point when the circuit breaker reaches the first position, a time difference reference value tred2 from the time point when the circuit breaker reaches the first position to the time point when the circuit breaker reaches the second position, a time difference reference value tred3 from the starting time of the driving action of the opening electromagnet to the time point when the circuit breaker leaves the second position, and a time difference reference value tred4 from the time point when the circuit breaker reaches the second position to the time point when the circuit breaker reaches the first position, wherein the reference values can be one data or a group of data, for example, the reference values.
When the circuit breaker is switched on, a control voltage or a control current is applied to a switching electromagnet in the circuit breaker, so that an operating mechanism is driven to execute switching-on operation, at the moment, the electric signal detection unit automatically detects a control voltage signal U1 or a current signal I1 applied to the switching-on electromagnet, records the application time t1 of the control voltage U1 or the control current I1, converts analog quantities such as the amplitude, the phase and the frequency of the control voltage U1 or the control current I1 into corresponding digital quantities, and sends the digital quantities to the processing unit. After the circuit breaker executes a closing operation, the circuit breaker is started from a closing position and continuously moves to a closing position, at the moment, the position detection unit automatically outputs a signal that the circuit breaker reaches a first position and a signal that the circuit breaker reaches a second position to the processing unit, the processing unit records a moment t2 when receiving the signal that a main contact of the circuit breaker reaches the first position, and the processing unit records a moment t3 when receiving the signal that the circuit breaker reaches the second position; as shown in fig. 2, the processing unit obtains a time difference Δ t1 between the energization start time t1 of the closing electromagnet and the time t2 when the circuit breaker reaches the first position and a time difference Δ t2 between the time t2 when the circuit breaker reaches the first position and the time t3 when the circuit breaker reaches the second position according to recorded times t1, t2 and t3, and compares the time difference Δ t1 with a corresponding time difference reference value tred1 to determine whether the states of the closing tripping structures of the closing electromagnet and the circuit breaker are normal; comparing the time difference Deltat 2 with a corresponding time difference reference value tred2 to judge whether the state of the operating mechanism is normal or not; the time (i.e., the sum of Δ t1 and Δ t 2) from the energization start time t1 of the closing electromagnet to the time t3 when the breaker reaches the second position may be compared with the corresponding time difference reference value (tred 1+ tred 2) to determine whether the closing operation state of the entire breaker is normal.
When the circuit breaker is opened, the opening electromagnet in the circuit breaker is applied with control voltage or control current, so that the driving operation mechanism is driven to execute opening operation, at the moment, the electric signal detection unit automatically detects a control voltage signal U2 or a current signal I2 applied to the opening electromagnet, records the application time t4 of the control voltage U2 or the control current I2 at the moment, converts analog quantities of amplitude, phase, frequency and the like of the control voltage U2 or the control current I2 into corresponding digital quantities, and sends the digital quantities to the processing unit. After the breaker performs opening operation, the breaker is started from an opening position and continuously moves to an opening position, at the moment, a position detection unit automatically outputs a signal that the breaker reaches a second position and a signal that the breaker reaches a first position to a processing unit, the processing unit records a time t5 when receiving the signal that the breaker reaches the second position, the processing unit records a time t6 when receiving the signal that the breaker reaches the first position, the processing unit obtains a time difference delta t3 between the opening electromagnet energization starting time t4 and the time t5 that the breaker reaches the second position and a time difference delta t4 between the time t5 that the breaker reaches the second position and the time t6 that the breaker reaches the first position according to the recorded times t4, t5 and t 6; comparing the time difference delta t3 with a corresponding time difference reference value tred3 to judge whether the states of the opening electromagnet and the opening tripping structure of the circuit breaker are normal or not, and comparing the time difference delta t4 with a corresponding time difference reference value tred4 to judge whether the states of the operating mechanism are normal or not; the time difference between the energization start time t4 of the opening electromagnet and the time t6 when the circuit breaker reaches the first position (namely, the sum of the Δ t3 and the Δ t 4) can be compared with the corresponding time difference reference value (tred 3+ tred 4), and whether the opening operation state of the whole circuit breaker is normal can be judged.
In another simplified embodiment, the processing unit may be a simple processing module, and the time difference is not compared with the reference value, but is obtained, and the circuit breaker state is determined manually according to the data.
Fig. 3 and 4 show two embodiments of the position detection unit, respectively.
As shown in fig. 3, the position detecting unit in this embodiment adopts two microswitches 4 as position signal output devices of the circuit breaker 1, a cantilever 3 fixed to a main shaft 2 is disposed on the main shaft 2 of the circuit breaker 1, the cantilever 3 rotates correspondingly with the closing or opening of the circuit breaker, one microswitch 4 is disposed at each of a first position and a second position of the circuit breaker 1, and the main shaft 2 of the circuit breaker rotates from a closing position to an opening position or from the opening position to the closing position, so that the corresponding microswitch 4 is pushed by the cantilever 3 to be switched, thereby outputting a signal.
As shown in fig. 4, the position detecting unit in this embodiment adopts a photoelectric switch as a position signal output device of the circuit breaker 1, a sliding vane 5 fixed to the main shaft 2 is disposed on the main shaft 2 of the circuit breaker 1, the sliding vane 5 rotates correspondingly with the closing or opening of the circuit breaker 1, a photoelectric switch 6 matched with the sliding vane 5 is disposed at each of the first position and the second position of the circuit breaker 1, the main shaft 2 of the circuit breaker rotates from the closing position to the opening position or from the opening position to the closing position, the sliding vane 5 will block an optical channel of the corresponding photoelectric switch 6, and the corresponding photoelectric switch 6 will convert, thereby outputting a signal.
Fig. 5 and 6 show two embodiments of the electrical signal detection unit, respectively.
The electric signal detection unit in fig. 5 is an electromagnet control voltage signal detection circuit, and the control voltage U1/U2 of the closing/opening electromagnet is limited by a resistor R2, rectified by a rectifier bridge IC2, inputted to the photoelectric coupler IC1, and then outputted a corresponding control voltage detection signal by the photoelectric coupler.
The electric signal detection unit in fig. 6 is an electromagnet control current signal detection circuit, the control current I1/I2 of the closing/opening electromagnet is converted into a corresponding voltage signal by a resistor RL, then the current is limited by a resistor R2, and then the current is rectified by a rectifier bridge IC2 and then is input into the photoelectric coupler IC1, and then a corresponding control voltage signal is output by the photoelectric coupler.
Fig. 7 shows a specific installation structure of the state monitoring device in the circuit breaker, as shown in fig. 7, the state monitoring device is located behind the electromagnetic driving mechanism and above the operating mechanism.
Claims (5)
1. A state monitoring device of a switch device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; characterized in that the condition monitoring device comprises:
the electric signal detection unit is used for obtaining the starting moment of the driving action by detecting the control electric signal of the electromagnetic driving mechanism;
the position detection unit is used for detecting the position state of the switching device to obtain a first time when the switching device reaches a preset first position and/or a second time when the switching device reaches a preset second position, and the switching device is in an open state and a closed state at the first position and the second position respectively;
and the processing unit is used for obtaining a time period formed between the driving action starting time and the first time/the second time or at least one of three time periods formed between the driving action starting time, the first time and the second time.
2. A condition monitoring device of a switchgear according to claim 1, characterized in that the electromagnetic drive means comprise a closing electromagnet and/or a breaking electromagnet.
3. The state monitoring device of the switching device according to claim 1, wherein the position detection unit detects the position state of the switching device through two switches coupled to the position state of the switching device.
4. A condition monitoring device of a switching device according to claim 3, characterized in that said two switches are micro switches or opto-electronic switches.
5. A switching device drives an operating mechanism to act through an electromagnetic driving mechanism so as to realize the conversion between an open state and a closed state; characterized in that the switching device is provided with a condition monitoring device according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020639802.8U CN212111685U (en) | 2020-04-24 | 2020-04-24 | State monitoring device of switch device and switch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020639802.8U CN212111685U (en) | 2020-04-24 | 2020-04-24 | State monitoring device of switch device and switch device |
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| CN212111685U true CN212111685U (en) | 2020-12-08 |
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| CN202020639802.8U Active CN212111685U (en) | 2020-04-24 | 2020-04-24 | State monitoring device of switch device and switch device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267723A (en) * | 2021-06-17 | 2021-08-17 | 巨邦集团有限公司 | Circuit breaker divide-shut brake detection device and circuit breaker |
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2020
- 2020-04-24 CN CN202020639802.8U patent/CN212111685U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267723A (en) * | 2021-06-17 | 2021-08-17 | 巨邦集团有限公司 | Circuit breaker divide-shut brake detection device and circuit breaker |
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