CN214225287U - Automatic fault diagnosis system for electric valve in electric system - Google Patents
Automatic fault diagnosis system for electric valve in electric system Download PDFInfo
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- 238000013024 troubleshooting Methods 0.000 abstract description 5
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Abstract
The utility model discloses a trouble automatic diagnosis system for motorised valve among electrical system sets up in the motorised valve control system, and the motorised valve control system includes PLC controller, auxiliary relay, ac contactor and motorised valve, and PLC controller output is connected with the auxiliary relay contact, and another contact of auxiliary relay is connected with ac contactor, and ac contactor is connected with the motorised valve terminal; the fault automatic diagnosis system comprises a fault identification module and an operation interface, wherein the fault identification module is connected with the operation interface, and the fault identification module comprises an electric valve real-time opening detection module, an electric valve electrifying detection module, a PLC (programmable logic controller) opening instruction detection module and a PLC closing instruction detection module. The method has the advantages of quickly providing accurate fault points, realizing quick troubleshooting of fault reasons, improving the overhauling efficiency, improving the overhauling performance of the electric valve in the electric control system and realizing the feasibility of automatic fault diagnosis of the electric valve in the electric control system.
Description
Technical Field
The utility model relates to a fault diagnosis system especially relates to a fault automatic diagnosis system that is arranged in electric system motorised valve, belongs to electrical automation control technical field.
Background
At present, the oil exploitation work has better realized automated control, which makes each drilling equipment and tool get wider and better utilization in production application. Among them, automation of the electrical system is essential to ensure smooth progress of mining work.
In order to improve the safety and reliability of the control electrical system, devices such as an intermediate relay, an alternating current contactor and the like are adopted among the loops for isolation protection. Therefore, when the equipment in the electrical system is abnormally executed, the existing obstacle probability is high, manual work is needed to check one by one, and a real fault point is confirmed. With the development of electrical systems towards intellectualization, unmanned, large-scale and other directions, the defect of completely depending on manual inspection of fault points is increasingly prominent, and the related problems include: the larger the scale of the electric system is, the longer the inspection time is, so that the maintenance efficiency is low; even if the problem that the operation of the electrical system is not influenced occurs, the system needs to be stopped to wait for manual confirmation, and the system operation efficiency is low.
The electric valve in the electric system mainly realizes the functions of cutting off and opening the manifold, and two control signals of opening and closing are introduced from the functional point of view, and two signals of opening in place and closing in place are fed back, so that the use requirement of the system can be met (as shown in figures 1-2). The electric valve can realize the preset function of the electric valve, but the equipment has low maintainability, which is not beneficial to fast troubleshooting of fault points; in addition, control signals and feedback signals related to the electric valve are transmitted through an intermediate relay, an alternating current contactor, a valve terminal, a PLC input/output terminal and the like, once the signals are abnormal, the link of a real fault point cannot be determined, and the quick elimination of the fault point is not facilitated for an operator.
Therefore, in order to meet the new requirements of the development of the electrical system, an automatic fault diagnosis system for an electric valve in the electrical system is urgently needed to effectively ensure the intelligent operation efficiency of the electrical system.
In 2018, 03 and 27, a patent document with publication number CN207148659U and name "an automatic pump pit leakage prevention control system" is disclosed, wherein the patent document specifically discloses: the device comprises a PLC (programmable logic controller), a pump pit liquid level detection switch, a pump pit sewage discharge motor, a filter cloth rotary disc filter equipment motor, a water pump motor, an electric valve, an intermediate relay, a manual switch and a contactor; the output end of the pump pit liquid level detection switch is connected with the digital quantity input end of the PLC; the switching value output end of the PLC is connected with a coil of a contactor, and a main contact of the contactor is connected in series in a power supply loop of a pump pit pollution discharge motor and a filter cloth rotary disc filter equipment motor; and the switching value output end of the PLC is connected with a coil of an intermediate relay, and a contact of the intermediate relay is connected in series in a power supply loop of the electric valve. The control system has the advantages of reasonable design, simple and compact structure, convenient operation, high automation degree and high control efficiency. In this patent document, the automatic control of leakage prevention of the pump pit is mainly used, and automatic diagnosis of a failure is not mentioned.
Disclosure of Invention
The utility model discloses aim at overcoming prior art not enough, and propose the trouble automatic diagnosis system that is arranged in electric system motorised valve. According to the technical scheme, in an electric system loop, the combined configuration of feedback points is optimized, an automatic identification detection module is combined, accurate fault points are quickly given, and quick troubleshooting of fault reasons is realized, so that the overhauling efficiency is improved, the overhauling performance of an electric valve in an electric control system is improved, and the feasibility of automatic fault diagnosis of the electric valve in the electric control system is realized.
In order to achieve the technical purpose, the following technical scheme is proposed:
the technical scheme provides an automatic fault diagnosis system for an electric valve in an electric system, which is arranged in an electric valve control system, wherein the electric valve control system comprises a PLC (programmable logic controller), an intermediate relay, an alternating current contactor and an electric valve, the output end of the PLC is connected with a contact of the intermediate relay, the other contact of the intermediate relay is connected with the alternating current contactor, the alternating current contactor is connected with a terminal of the electric valve, and a circuit for real-time control and feedback monitoring of the electric valve is formed among the PLC, the intermediate relay, the alternating current contactor and the electric valve;
the fault automatic diagnosis system comprises a fault identification module and an operation interface arranged on a PLC (programmable logic controller), wherein the fault identification module is connected with the operation interface and comprises an electric valve real-time opening detection module, an electric valve electrifying detection module, a PLC opening instruction detection module and a PLC closing instruction detection module;
in the real-time opening detection module of the electric valve, valve position feedback current (+)) and valve position feedback current (-)) in a terminal of an electric valve actuator are respectively connected to a PLC controller analog input module, and the electric valve realizes real-time monitoring of the valve position by reading the feedback current in real time;
in the electric valve electrifying detection module, the electric valve is connected with a 380VAC power supply, the PLC controller controls an intermediate relay, and the intermediate relay controls an alternating current contactor, so that the electrification control of the electric valve is realized; the alternating current contactor is additionally provided with a feedback contact, a 24VDC power supply is connected to one end of a normally open contact, the other end of the contact is connected with an input point of a PLC (programmable logic controller), when the input point of the PLC detects a high level, the fact that an electric valve is electrified is shown, and otherwise, the fact that the electric valve is powered off is shown;
in the PLC controller opening instruction detection module, a PLC controller opening instruction signal is output to a terminal of an electric valve actuator through an intermediate relay, a 24VDC power supply is connected to one end of a normally open contact of the intermediate relay, the other end of the normally open contact is connected with an input point of the PLC controller, when the input point of the PLC controller detects a high level, an opening instruction is issued, otherwise, the opening instruction is not issued;
in the PLC closing instruction detection module, a PLC closing instruction signal is output to a terminal of an electric valve actuator through an intermediate relay, a 24VDC power supply is connected to one end of a normally open contact of the intermediate relay, the other end of the normally open contact is connected with an input point of the PLC, when the input point of the PLC detects a high level, a closing instruction is issued, otherwise, the closing instruction is not issued.
Based on the above technical solution, an automatic fault diagnosis system for an electrically operated valve in an electrical system is provided, and an automatic fault diagnosis method for an electrically operated valve in an electrical system is provided, which specifically includes:
A. the PLC controller, the intermediate relay, the alternating current contactor and the electric valve are communicated, and a power supply of the electric valve control system is opened;
B. if the feedback of the intermediate relay is low level, the PLC controller power-on instruction (the intermediate relay and/or the PLC output point) has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent alternating current contactor fault diagnosis program;
C. if the feedback of the alternating current contactor is low level, the alternating current contactor has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent fault diagnosis program of the electric valve actuator;
D. if the electric valve is in a non-state, the electric valve actuator has an electrified fault, and the current fault automatic diagnosis program is ended; otherwise, obtaining a diagnosis result of normal power supply of the electric valve, and entering a subsequent PLC (programmable logic controller) opening instruction fault diagnosis program;
E. if the PLC controller is started to send command feedback for issuing, entering a subsequent intermediate relay fault diagnosis program; otherwise, entering a subsequent PLC controller off instruction fault diagnosis program;
F. in the intermediate relay fault diagnosis program in the step E, if the feedback of the intermediate relay is low level, the PLC controller on instruction (the intermediate relay and/or the PLC output point) has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent electric valve opening fault diagnosis program;
G. if the electric valve is fed back to be at a low level when in place, the electric valve is opened to have a fault, and a subsequent electric valve in-place fault diagnosis program is entered; otherwise, the electric valve is normally opened, and the current fault automatic diagnosis program is ended;
H. if the real-time opening feedback of the electric valve is normal, the current electric valve is normally opened in place, and the current fault automatic diagnosis program is finished; otherwise, the current failure of the electric valve actuator is obtained, and the current automatic failure diagnosis program is finished;
I. in the PLC controller closing instruction fault diagnosis program in the step E, if the PLC controller closing instruction feedback is not issued, entering the fault diagnosis program of the electric valve; otherwise, entering a subsequent intermediate relay fault diagnosis program;
J. in the intermediate relay fault diagnosis program in the step I, if the feedback of the intermediate relay is low level, a PLC controller off instruction (an intermediate relay and/or a PLC output point) has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent electric valve closing fault diagnosis program;
K. if the electric valve is closed in place and fed back to be low level, the electric valve is closed to have a fault, and a subsequent electric valve closing in place fault diagnosis program is entered; otherwise, the electric valve is normally closed, and the current fault automatic diagnosis program is ended;
H. if the real-time closing degree feedback of the electric valve is normal, the current electric valve is normally closed in place, and the current fault automatic diagnosis program is ended; otherwise, the current electric valve actuator is closed to cause a fault, and the current fault automatic diagnosis program is ended.
Further, the PLC power-on command obstacle comprises an intermediate relay obstacle and/or a PLC output point obstacle.
Further, the electric valve actuator failure comprises electric valve power source obstruction and/or electric circuit obstruction.
Further, the PLC controller on command obstacle comprises an intermediate relay obstacle and/or a PLC output point obstacle.
Further, the electric valve opening failure comprises an electric valve actuator failure.
Further, the electric valve in-place fault comprises an electric valve in-place feedback point fault and/or a power line connection fault.
Further, the electric valve closing failure comprises an electric valve actuator failure.
Further, the electric valve closing position fault comprises an electric valve opening position feedback point fault and/or an electric line connection fault.
In the particle drilling process, a large number of other electrical systems are also used, and the multipoint state feedback monitoring of the whole flow of the electrical system can be carried out according to the design of the automatic fault diagnosis method of the electric valve in the technical scheme, so that the fault identification rate and the maintenance rate of the whole electrical system are improved.
By adopting the technical scheme, the beneficial technical effects brought are as follows:
in the utility model, a state monitoring feedback network is established based on the corresponding relation between the monitoring state and the abnormal condition by the arrangement of the PLC controller, the intermediate relay, the AC contactor and the electric valve and by utilizing the contacts of the intermediate relay and the AC contactor, so as to realize the real-time feedback monitoring of the state; meanwhile, monitoring information from the electric valve to a PLC (programmable logic controller) path can be enriched, full-point monitoring of each loop is realized, and a foundation is provided for accurate identification of fault points.
The utility model discloses utilize the feedback information of multiple spot location, combine the strategy of path parameter fusion, carry out the one-to-one with trouble and feedback phenomenon, realized the automatic identification and the demonstration of fault point for it has obtained successful application in particle well drilling electrical system, is showing and is improving system's troubleshooting efficiency, has shortened troubleshooting time, provides a feasible technical scheme for similar electrical system's maintainability.
Drawings
FIG. 1 is a schematic diagram (I) of the control feedback of an electric valve in the prior art, wherein KA 1-KA 3 is an intermediate relay, and KM1 is an AC contactor;
FIG. 2 is a schematic diagram of prior art electric valve control feedback;
fig. 3 is a schematic view (one) of the monitoring feedback combination of the automatic fault diagnosis system of the present invention, wherein KA 1-KA 3 is an intermediate relay, and KM1 is an ac contactor;
fig. 4 is a schematic diagram (two) of the monitoring feedback combination of the automatic fault diagnosis system of the present invention, wherein KA1 and KA3 are intermediate relays, and KM1 is an ac contactor;
fig. 5 is a flow chart of the automatic fault diagnosis method of the present invention.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
The automatic fault diagnosis system for the electric valve in the electric system is arranged in the electric valve control system, the electric valve control system comprises a PLC (programmable logic controller), an intermediate relay, an alternating current contactor and the electric valve, the output end of the PLC is connected with the contact of the intermediate relay, the other contact of the intermediate relay is connected with the alternating current contactor, the alternating current contactor is connected with the terminal of the electric valve, and a circuit for real-time control and feedback monitoring of the electric valve is formed among the PLC, the intermediate relay, the alternating current contactor and the electric valve;
the fault automatic diagnosis system comprises a fault identification module and an operation interface arranged on a PLC (programmable logic controller), wherein the fault identification module is connected with the operation interface and comprises an electric valve real-time opening detection module, an electric valve electrifying detection module, a PLC opening instruction detection module and a PLC closing instruction detection module;
in the real-time opening detection module of the electric valve, valve position feedback current (+)) and valve position feedback current (-)) in a terminal of an electric valve actuator are respectively connected to a PLC controller analog input module, and the electric valve realizes real-time monitoring of the valve position by reading the feedback current in real time;
in the electric valve electrifying detection module, the electric valve is connected with a 380VAC power supply, the PLC controller controls an intermediate relay, and the intermediate relay controls an alternating current contactor, so that the electrification control of the electric valve is realized; the alternating current contactor is additionally provided with a feedback contact, a 24VDC power supply is connected to one end of a normally open contact, the other end of the contact is connected with an input point of a PLC (programmable logic controller), when the input point of the PLC detects a high level, the fact that an electric valve is electrified is shown, and otherwise, the fact that the electric valve is powered off is shown;
in the PLC controller opening instruction detection module, a PLC controller opening instruction signal is output to a terminal of an electric valve actuator through an intermediate relay, a 24VDC power supply is connected to one end of a normally open contact of the intermediate relay, the other end of the normally open contact is connected with an input point of the PLC controller, when the input point of the PLC controller detects a high level, an opening instruction is issued, otherwise, the opening instruction is not issued;
in the PLC closing instruction detection module, a PLC closing instruction signal is output to a terminal of an electric valve actuator through an intermediate relay, a 24VDC power supply is connected to one end of a normally open contact of the intermediate relay, the other end of the normally open contact is connected with an input point of the PLC, when the input point of the PLC detects a high level, a closing instruction is issued, otherwise, the closing instruction is not issued.
In an automatic fault diagnosis system for an electrically operated valve in an electrical system, the fault feedback signals involved are as shown in table 1 below:
example 2
Based on embodiment 1, this embodiment proposes an automatic fault diagnosis method for an electrically operated valve in an electrical system, which specifically includes:
A. the PLC controller, the intermediate relay, the alternating current contactor and the electric valve are communicated, and a power supply of the electric valve control system is opened;
B. if the feedback of the intermediate relay is low level, the PLC controller power-on instruction (the intermediate relay and/or the PLC output point) has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent alternating current contactor fault diagnosis program;
C. if the feedback of the alternating current contactor is low level, the alternating current contactor has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent fault diagnosis program of the electric valve actuator;
D. if the electric valve is in a non-state, the electric valve actuator has an electrified fault, and the current fault automatic diagnosis program is ended; otherwise, obtaining a diagnosis result of normal power supply of the electric valve, and entering a subsequent PLC (programmable logic controller) opening instruction fault diagnosis program;
E. if the PLC controller is started to send command feedback for issuing, entering a subsequent intermediate relay fault diagnosis program; otherwise, entering a subsequent PLC controller off instruction fault diagnosis program;
F. in the intermediate relay fault diagnosis program in the step E, if the feedback of the intermediate relay is low level, the PLC controller on instruction (the intermediate relay and/or the PLC output point) has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent electric valve opening fault diagnosis program;
G. if the electric valve is fed back to be at a low level when in place, the electric valve is opened to have a fault, and a subsequent electric valve in-place fault diagnosis program is entered; otherwise, the electric valve is normally opened, and the current fault automatic diagnosis program is ended;
H. if the real-time opening feedback of the electric valve is normal, the current electric valve is normally opened in place, and the current fault automatic diagnosis program is finished; otherwise, the current failure of the electric valve actuator is obtained, and the current automatic failure diagnosis program is finished;
I. in the PLC controller closing instruction fault diagnosis program in the step E, if the PLC controller closing instruction feedback is not issued, entering the fault diagnosis program of the electric valve; otherwise, entering a subsequent intermediate relay fault diagnosis program;
J. in the intermediate relay fault diagnosis program in the step I, if the feedback of the intermediate relay is low level, a PLC controller off instruction (an intermediate relay and/or a PLC output point) has a fault, and the current fault automatic diagnosis program is finished; otherwise, entering a subsequent electric valve closing fault diagnosis program;
K. if the electric valve is closed in place and fed back to be low level, the electric valve is closed to have a fault, and a subsequent electric valve closing in place fault diagnosis program is entered; otherwise, the electric valve is normally closed, and the current fault automatic diagnosis program is ended;
H. if the real-time closing degree feedback of the electric valve is normal, the current electric valve is normally closed in place, and the current fault automatic diagnosis program is ended; otherwise, the current electric valve actuator is closed to cause a fault, and the current fault automatic diagnosis program is ended.
In the method for automatically diagnosing the fault of the electric valve in the electric system, the classification of the fault, the feedback phenomenon and the handling measure are shown in the following table 2.
Claims (2)
1. Automatic fault diagnosis system for electric valves in an electrical system, characterized in that: the PLC is connected with the output end of the PLC, the other contact of the intermediate relay is connected with the alternating current contactor, the alternating current contactor is connected with the terminal of the electric valve, and a circuit for real-time control and feedback monitoring of the electric valve is formed among the PLC, the intermediate relay, the alternating current contactor and the electric valve;
the fault automatic diagnosis system comprises a fault identification module and an operation interface arranged on a PLC, wherein the fault identification module is connected with the operation interface and comprises an electric valve real-time opening detection module, an electric valve electrifying detection module, a PLC opening instruction detection module and a PLC closing instruction detection module.
2. The system of claim 1, wherein the system further comprises: the real-time opening degree detection module of the electric valve comprises: the valve position feedback current (+) and the valve position feedback current (-) in the electric valve actuator terminal are respectively connected with the PLC controller analog quantity input module;
the electric valve electrification detection module comprises: the electric valve is connected with a 380VAC power supply, one end of a contact of the alternating current contactor is connected with a 24VDC power supply, and the other end of the contact is connected with an input point of the PLC;
the PLC controller is provided with an instruction detection module: the PLC opens the command signal and passes the intermediate relay and exports to the electric valve actuator terminal; one end of a normally open contact of the intermediate relay is connected with a 24VDC power supply, and the other end of the normally open contact of the intermediate relay is connected with an input point of a PLC (programmable logic controller);
the PLC controller closes the instruction detection module: the PLC controller closes the command signal and passes the intermediate relay and exports to the actuator terminal of the electric valve; one end of a normally open contact of the intermediate relay is connected with a 24VDC power supply, and the other end of the normally open contact of the intermediate relay is connected with an input point of the PLC.
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| CN202022673163.XU CN214225287U (en) | 2020-11-18 | 2020-11-18 | Automatic fault diagnosis system for electric valve in electric system |
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| CN202022673163.XU CN214225287U (en) | 2020-11-18 | 2020-11-18 | Automatic fault diagnosis system for electric valve in electric system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985858A (en) * | 2021-11-30 | 2022-01-28 | 卧龙电气南阳防爆集团股份有限公司 | Detection and diagnosis device for accidental faults of electric control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985858A (en) * | 2021-11-30 | 2022-01-28 | 卧龙电气南阳防爆集团股份有限公司 | Detection and diagnosis device for accidental faults of electric control system |
| CN113985858B (en) * | 2021-11-30 | 2024-05-17 | 卧龙电气南阳防爆集团股份有限公司 | Detection and diagnosis device for accidental faults of electric control system |
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