CN118942934B - Circuit breaker operating mechanism energy storage spring self-adjusting system - Google Patents
Circuit breaker operating mechanism energy storage spring self-adjusting system Download PDFInfo
- Publication number
- CN118942934B CN118942934B CN202411435716.4A CN202411435716A CN118942934B CN 118942934 B CN118942934 B CN 118942934B CN 202411435716 A CN202411435716 A CN 202411435716A CN 118942934 B CN118942934 B CN 118942934B
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- spring
- energy storage
- pull rod
- storage spring
- stepper motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
- H01H2003/266—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor having control circuits for motor operating switches, e.g. controlling the opening or closing speed of the contacts
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- Breakers (AREA)
- Springs (AREA)
Abstract
The invention relates to a self-adjusting system of an energy storage spring of a circuit breaker operating mechanism, which is arranged in an operating mechanism box of the circuit breaker, wherein the energy storage spring is arranged in a spring cylinder, the self-adjusting system comprises a pressure sensor arranged in the spring cylinder, the pressure sensor is propped against one side of the energy storage spring, the other side of the energy storage spring is propped against a spring pressing plate, a spring pull rod is further arranged in the spring cylinder, the spring pull rod is fixed with the spring pressing plate and drives the spring pressing plate to translate in the spring cylinder, a stepping motor is arranged outside the spring cylinder and connected with the spring pull rod, and the stepping motor is connected with the spring pull rod through the cooperation of a thread sleeve. According to the self-adjusting system, the opening and closing energy storage spring can be driven to automatically adjust through the cooperation of the additionally arranged stepping motor and the threaded sleeve, and the problem of spring force value reduction caused by spring fatigue is solved by automatically improving the compression amount of the spring, so that the running risk of a product is greatly reduced.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a self-adjusting system of an energy storage spring of a circuit breaker operating mechanism.
Background
The high-voltage circuit breaker is an important device in an electric power system, the operating mechanism is a core power element of the high-voltage circuit breaker, and as the service life increases, the opening and closing springs of the circuit breaker mechanism inevitably have fatigue relaxation problems, so that mechanical faults such as refused opening and closing in place of products can be gradually developed, and the opening and closing reliability of the circuit breaker is seriously affected. According to statistics, the proportion of faults of the breaker operating mechanism caused by spring failure is up to 40%, so that the problem of spring fatigue failure is solved, and the method has important significance for improving the reliability of the breaker.
The existing breaker mechanism spring fatigue problem can be found only after power failure pre-detection or mechanical failure of a product occurs, even if a product with spring pressure on-line monitoring is configured, the breaker mechanism has a monitoring function, the capability of follow-up automatic adjustment and defect elimination is lacking, manual power failure maintenance processing is needed, the power failure time is long, the power supply reliability is affected, a brake-opening and brake-closing energy-storage spring nut anti-loosening means is generally adopted in the industry, such as a friction anti-loosening structure or a double nut structure, the anti-loosening reliability is not high, a destructive permanent anti-loosening mode is also adopted, the later maintenance adjustment is not facilitated, in addition, the existing spring pressure on-line monitoring system in the industry is used on the breaker mechanism, but only the spring pressure change can be monitored to send out early warning, the mechanism has no automatic adjusting function, on-site operation maintenance personnel can not timely perform defect elimination processing when the system gives out defect warning, the line power failure back maintenance is needed, and the product can have operation risks under the condition.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-adjusting system of an energy storage spring of a breaker operating mechanism, so as to solve the problems of abnormal refusal of opening and closing of a breaker caused by fatigue relaxation of the energy storage spring or loosening of a nut, and improve the operation reliability of products.
In order to solve the technical problems, the technical scheme of the invention is that the energy storage spring self-adjusting system of the breaker operating mechanism is characterized in that the energy storage spring is arranged in an operating mechanism box of the breaker, and the energy storage spring is arranged in a spring cylinder, and the energy storage spring self-adjusting system comprises
The pressure sensor is arranged in the spring cylinder, the pressure sensor is propped against one side of the energy storage spring, the other side of the energy storage spring is propped against a spring pressing plate, a spring pull rod is further arranged in the spring cylinder and is positioned at the center of the energy storage spring, two sides of the spring pull rod extend out of two sides of the spring cylinder respectively, and the spring pull rod is fixed with the spring pressing plate and drives the spring pressing plate to translate in the spring cylinder, so that compression energy storage of the energy storage spring is realized;
The stepping motor is arranged at the outer side of the spring cylinder, is connected with the spring pull rod and drives the spring pull rod to reciprocate;
the stepping motor is connected with the spring pull rod through the matching of the threaded sleeve, an output shaft of the stepping motor is connected with the threaded sleeve through the matching of the guide flat key, and a guide key slot for accommodating the insertion of the guide flat key is formed in the threaded sleeve;
The control unit comprises a data acquisition module and an intelligent monitoring module, wherein the data acquisition module is connected with the pressure sensor, converts and uploads a data signal detected by the pressure sensor to the intelligent monitoring module, and the intelligent monitoring module is connected with the data acquisition module and the stepping motor and controls the action of the stepping motor according to data transmitted by the data acquisition module;
The adjusting method of the self-adjusting system comprises the following steps:
S1, firstly, monitoring the pressure change of an energy storage spring in real time by a pressure sensor, feeding back a monitoring value to a data acquisition module, and entering a step S2;
S2, converting the data monitored by the pressure sensor by the data acquisition module, transmitting the converted data to the intelligent monitoring module, and entering into step S3:
S3, after receiving the data transmitted by the data acquisition module, the intelligent monitoring module compares the monitored data with a threshold value set in advance in the intelligent monitoring module, if the monitored data reaches the set threshold value, the step S4 is carried out, and if the monitored data does not reach the set threshold value, the step S2 is carried out;
S4, outputting an electric pulse signal by the intelligent monitoring module to drive the stepping motor to work, driving the threaded sleeve to rotate by a stepping angle by the stepping motor so as to improve the spring compression amount of the energy storage spring, and returning to the step S2 after the stepping motor acts;
S5, finishing adjustment.
Furthermore, a one-way bearing is arranged in the stepping motor.
Furthermore, a design guiding idle stroke between an output shaft of the stepping motor and the threaded sleeve is equal to a switching-on and switching-off stroke of the energy storage spring.
Further, the length of the guide key groove on the thread sleeve is greater than the compression stroke of the normal opening and closing of the energy storage spring.
The self-adjusting system has the advantages that the self-adjusting system can drive the opening and closing energy storage springs to automatically adjust through the cooperation of the additionally arranged stepping motor and the threaded sleeve, and when the spring pressure is reduced to a set threshold value, the intelligent monitoring module sends out an electric pulse signal to drive the stepping motor to rotate by a set stepping angle.
Through the one-way bearing of design in step motor to ensure that the thread bush can not reverse rotation, can avoid the thread bush to lead to the spring force value decline problem because of the screw loosening.
The design guide idle stroke between the output shaft of the stepping motor and the threaded sleeve is designed to be larger than the opening and closing stroke of the energy storage spring, so that the opening and closing operation process is not influenced.
The length of the guide key groove on the thread sleeve is designed to be larger than the compression stroke of normal opening and closing of the energy storage spring, so that collision between the motor output shaft and the thread sleeve in the normal opening and closing operation process is avoided.
The added stepping motor is linked with the opening and closing spring fastening nut, the motor is additionally provided with a one-way bearing, and the motor cannot reversely rotate, so that the problem of loosening of the spring fastening nut can be completely avoided, and the opening and closing abnormality caused by the change of the compression amount of the energy storage spring due to loosening of threads is reduced.
Drawings
Fig. 1 is a schematic diagram of a circuit breaker operating mechanism energy storage spring self-adjusting system of the present invention.
FIG. 2 is a schematic view of the installation position of the pressure sensor of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
The energy storage spring self-adjusting system of the breaker operating mechanism as shown in fig. 1 and 2 is characterized in that the energy storage spring is arranged in an operating mechanism box 7 of the breaker, the energy storage spring 8 is arranged in a spring cylinder 9, the spring cylinder 9 is of a hollow cylindrical sleeve structure, and the self-adjusting system comprises
A pressure sensor 10 installed in the spring cylinder 9, the pressure sensor 10 is propped against one side of the energy storage spring 8, the other side of the energy storage spring 8 is propped against a spring pressing plate 6, a spring pull rod 5 is also arranged in the spring cylinder 9, the spring pull rod 5 is positioned at the center of the energy storage spring 8, two sides of the spring pull rod 5 respectively extend out from two sides of the spring cylinder 9, the spring pull rod 5 is fixed with the spring pressing plate 6, and the spring pressing plate 6 is driven to translate in the spring cylinder 9, so that the compression energy storage of the energy storage spring 8 is realized.
The stepping motor 1 is arranged outside the spring cylinder 9, the stepping motor 1 is fixed at the tail end of the spring cylinder 9 through the matching of the mounting plate 2, the stepping motor 1 is connected with the spring pull rod 5 and drives the spring pull rod 5 to reciprocate, and therefore compression of the energy storage spring 8 is achieved.
The stepping motor 1 is connected with the spring pull rod 5 through the cooperation of the thread bush 4, the output shaft of the stepping motor 1 is connected with the thread bush 4 through the cooperation of the guide flat key 3, a guide key slot for accommodating the embedding of the guide flat key 3 is formed in the thread bush 4, and the stepping motor 1 drives the thread bush 4 to rotate to compress the spring pressing plate 6 to drive the energy storage spring to compress.
The design guiding idle stroke between the output shaft of the stepping motor 1 and the thread bush 4 is equal to the opening and closing stroke of the energy storage spring 8. The design between the output shaft of the stepping motor 1 and the thread bush 4 is guided to the opening and closing stroke which is designed to be larger than the energy storage spring 8, so that the opening and closing operation process is not influenced.
A one-way bearing is also arranged inside the stepping motor 1. Through the inside one-way bearing that designs at step motor 1 to ensure that thread bush 4 can not reverse rotation, can avoid thread bush 4 because of the spring force value decline problem that the screw loosening led to.
The length of the guide key groove on the thread sleeve 4 is greater than the compression stroke of the normal opening and closing of the energy storage spring 8. The length of the guide key groove on the thread sleeve 4 is designed to be larger than the compression stroke of normal opening and closing of the energy storage spring 8, so that collision between the motor output shaft and the thread sleeve 4 in the normal opening and closing operation process is avoided.
The control unit comprises a data acquisition module and an intelligent monitoring module, wherein the data acquisition module is connected with the pressure sensor 10, converts and uploads a data signal detected by the pressure sensor 10 to the intelligent monitoring module, and the intelligent monitoring module is connected with the data acquisition module and the stepping motor 1 and controls the stepping motor 1 to act according to the data of the data acquisition module.
The adjusting method of the self-adjusting system comprises the following steps:
And S1, firstly, the pressure sensor 10 monitors the pressure change of the energy storage spring 8 in real time, and feeds back the monitored value to the data acquisition module, and the step S2 is carried out.
And S2, converting the data monitored by the pressure sensor 10 by the data acquisition module, transmitting the converted data to the intelligent monitoring module, and entering step S3.
And S3, after receiving the data transmitted by the data acquisition module, the intelligent monitoring module compares the monitored data with a threshold value set in advance in the intelligent monitoring module, if the monitored data reaches the set threshold value, the step S4 is carried out, and if the monitored data does not reach the set threshold value, the step S2 is carried out.
And S4, outputting an electric pulse signal by the intelligent monitoring module to drive the stepping motor to work, driving the threaded sleeve 4 to rotate by a stepping angle by the stepping motor 1 so as to improve the spring compression amount of the energy storage spring 8, and returning to the step S2 after the stepping motor 1 acts.
S5, finishing adjustment.
According to the self-adjusting system, the opening and closing energy storage spring can be driven to automatically adjust through the cooperation of the additionally arranged stepping motor 1 and the threaded sleeve 4, when the spring pressure is reduced to a set threshold value, the intelligent monitoring module sends out an electric pulse signal to drive the stepping motor to rotate by a set stepping angle, the scheme automatically improves the compression amount of the spring to compensate the problem of reduction of the spring force value caused by the fatigue of the spring, and therefore the problem of reduction of the spring force value can be compensated in real time without power failure of a circuit, the running risk of products is greatly reduced, and the self-adjusting system is an initial in the industry.
The added stepping motor 1 is linked with the opening and closing spring fastening nut, the motor is additionally provided with a one-way bearing, and the motor cannot reversely rotate, so that the problem of loosening of the spring fastening nut can be completely avoided, and the opening and closing abnormality caused by the change of the compression amount of the energy storage spring due to loosening of threads is reduced.
The present invention is not limited in any way by the above-described preferred embodiments, but is not limited to the above-described preferred embodiments, and any person skilled in the art will appreciate that the present invention can be embodied in the form of a program for carrying out the method of the present invention, while the above disclosure is directed to equivalent embodiments capable of being modified or altered in some ways, it is apparent that any modifications, equivalent variations and alterations made to the above embodiments according to the technical principles of the present invention fall within the scope of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411435716.4A CN118942934B (en) | 2024-10-15 | 2024-10-15 | Circuit breaker operating mechanism energy storage spring self-adjusting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411435716.4A CN118942934B (en) | 2024-10-15 | 2024-10-15 | Circuit breaker operating mechanism energy storage spring self-adjusting system |
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| Publication Number | Publication Date |
|---|---|
| CN118942934A CN118942934A (en) | 2024-11-12 |
| CN118942934B true CN118942934B (en) | 2024-12-20 |
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| CN202411435716.4A Active CN118942934B (en) | 2024-10-15 | 2024-10-15 | Circuit breaker operating mechanism energy storage spring self-adjusting system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520660A (en) * | 2018-12-29 | 2019-03-26 | 中航电测仪器股份有限公司 | A kind of power circuit breaker spring pressure monitoring device and monitoring method |
| CN110530566A (en) * | 2019-10-10 | 2019-12-03 | 国网河南省电力公司电力科学研究院 | A kind of breaker switching on and off spring pressure monitoring system and detection method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863101B (en) * | 2022-12-07 | 2023-08-18 | 浙江置邦电力科技有限公司 | Detachable modularized breaker operating mechanism |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520660A (en) * | 2018-12-29 | 2019-03-26 | 中航电测仪器股份有限公司 | A kind of power circuit breaker spring pressure monitoring device and monitoring method |
| CN110530566A (en) * | 2019-10-10 | 2019-12-03 | 国网河南省电力公司电力科学研究院 | A kind of breaker switching on and off spring pressure monitoring system and detection method |
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| CN118942934A (en) | 2024-11-12 |
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