CN110410309B - Method for monitoring running state of auxiliary machine of large compressor unit - Google Patents
Method for monitoring running state of auxiliary machine of large compressor unit Download PDFInfo
- Publication number
- CN110410309B CN110410309B CN201910714740.4A CN201910714740A CN110410309B CN 110410309 B CN110410309 B CN 110410309B CN 201910714740 A CN201910714740 A CN 201910714740A CN 110410309 B CN110410309 B CN 110410309B
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- auxiliary machine
- signal
- state
- auxiliary
- automatic switch
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
The invention discloses a method for monitoring the running state of an auxiliary machine of a large-scale compressor unit, which is characterized in that control signals of an automatic switch, a contactor and a thermal relay in an MCC cabinet of the auxiliary machine are accessed to a DCS (distributed control system) for logic configuration, and the running state of each auxiliary machine is accurately judged by reading each signal, so that accidents are effectively avoided; when the large-scale compressor is in the running state before stopping, the oil pump and the like can be effectively prevented from being out of order to cause oil cut, and the compressor and the dragging motor are protected.
Description
Technical Field
The invention relates to an equipment monitoring method, in particular to a method for monitoring the running state of an auxiliary machine of a large-scale compressor unit.
Background
In the key equipment for oxygen production and oxygen conservation in steel plants, an air compressor, a supercharger, an oxygen compressor, a nitrogen compressor and the like all belong to large compressors. When the unit runs or stops, the auxiliary machine is not found in time due to failure and outage, and the oil is fed into the compressor body and the dragging motor due to the fact that the auxiliary machine is low in the oil tank, so that the running safety and the equipment safety of the unit are seriously affected. If lubricating oil enters a dragging motor, the insulation of the motor can be reduced, and the running safety of the motor is seriously affected by electric breakdown or electric leakage and the like. When the compressor runs, if lubricating oil enters the compressor body, the product quality of a compression medium of the compressor is affected slightly, and the running safety of a compressor unit is affected seriously. Because the oxygen compressor is completely prohibited from oil, if lubricating oil enters the oxygen compressor, the oxygen compressor unit can be ignited and exploded.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides the method for monitoring the running state of the auxiliary machine of the large compressor unit, and the running state of each auxiliary machine can be judged in time by the monitoring method, so that the occurrence of accidents is avoided.
The technical scheme is as follows: the invention relates to a method for monitoring the running state of an auxiliary machine of a large-scale compressor unit, which is characterized in that an auxiliary contact is additionally arranged on an automatic switch of each auxiliary machine, an automatic switch signal of each auxiliary machine is taken out, and the automatic switch signal is used as a main power supply loop signal of each auxiliary machine; installing monitoring points on auxiliary loops of main contactors of each auxiliary machine, taking contactor signals of each auxiliary machine out, and taking the contactor signals as operation signals of each auxiliary machine; installing monitoring points on auxiliary loops of the thermal relays of the auxiliary machines, taking out thermal relay signals of the auxiliary machines, and taking the thermal relay signals as electric signals of the auxiliary machines; and connecting the electrical contacts of the main power supply loop signal, the operation signal and the electrical signal into a DCS (distributed control system) for logic configuration, judging the operation state of each auxiliary machine by reading each signal, and giving an alarm according to the operation state.
Specifically, the logic of the logic configuration includes: when the automatic switch signal, the contactor type and the thermal relay signal of the auxiliary machine are all in the on state, the auxiliary machine is in a normal operation state.
When the automatic switch signal and the thermal relay signal of the auxiliary machine are in an on state and the contactor signal is in an off state, the auxiliary machine is in a stop operation state.
When the automatic switch signal and the contactor signal of the auxiliary machine are in the on state and the thermal relay signal is in the off state, the auxiliary machine is in the electrical fault state.
When the thermal relay signal and the contactor signal of the auxiliary machine are in the on state and the automatic switch signal is in the off state, the auxiliary machine is in the electrical power-off state.
Has the advantages that: according to the monitoring method, control signals of an automatic switch, a contactor and a thermal relay in an MCC cabinet of an auxiliary machine are accessed to a DCS (distributed control system) for logic configuration, and the running state of each auxiliary machine is accurately judged by reading each signal, so that accidents are effectively avoided; when the large-scale compressor is in the running state before stopping, the oil pump and the like can be effectively prevented from being out of order to cause oil cut, and the compressor and the dragging motor are protected.
Drawings
Fig. 1 is a schematic structural diagram of a monitoring system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by taking an oxygen-producing air compressor # 1 of a certain steel plant as an example.
As shown in figure 1, the working state of each auxiliary machine of the 1# oxygen-making air compressor is monitored by adopting the method for monitoring the running state of the auxiliary machine of the large-scale compressor unit.
An auxiliary contact is additionally arranged on an automatic switch in an MCC cabinet (box) of each auxiliary machine, and an automatic switch signal of each auxiliary machine is taken out and used as a main power supply loop signal of each auxiliary machine. The purpose is for the power supply condition of discovery auxiliary engine at the very first time, make emergency treatment measure to guarantee equipment safety in production.
And (3) mounting monitoring points on auxiliary circuits of main contactors of the auxiliary machines, taking contactor signals of the auxiliary machines out, and taking the contactor signals as operation signals of the auxiliary machines to monitor the operation conditions of the auxiliary machines.
And (3) mounting monitoring points on auxiliary circuits of the thermal relays of the auxiliary machines, taking out thermal relay signals of the auxiliary machines, and taking the thermal relay signals as electric signals of the auxiliary machines to monitor whether the auxiliary machines have electric faults or not.
The electrical contacts of the main power supply loop signal, the operation signal and the electrical signal are accessed into the DCS system for logic configuration, and specifically, the logic of the logic configuration includes: when the automatic switch signal, the contactor type and the thermal relay signal of the auxiliary machine are all in the on state, the auxiliary machine is in a normal operation state; when the automatic switch signal and the thermal relay signal of the auxiliary machine are in a switch-on state and the contactor signal is in a switch-off state, the auxiliary machine is in a stop operation state; when the automatic switch signal and the contactor signal of the auxiliary machine are in the on state and the thermal relay signal is in the off state, the auxiliary machine is in an electrical fault state; when the thermal relay signal and the contactor signal of the auxiliary machine are in the on state and the automatic switch signal is in the off state, the auxiliary machine is in the electrical power-off state.
Wherein the disconnection is 0 and the connection is 1, programming is carried out in a DCS system according to the logic, the operation state of each auxiliary machine is judged by reading each signal, and a screen is triggered to flash to give an alarm according to the operation state. The requirement of comprehensively monitoring auxiliary machines is completed, and the D0 point can be accessed to carry out flashing alarm of the equipment according to the requirement in the later period.
Claims (1)
1. A method for monitoring the running state of an auxiliary machine of a large-scale compressor unit is characterized in that an auxiliary contact is additionally arranged on an automatic switch of each auxiliary machine, an automatic switch signal of each auxiliary machine is taken out, and the automatic switch signal is used as a main power supply loop signal of each auxiliary machine;
installing monitoring points on auxiliary loops of main contactors of each auxiliary machine, taking contactor signals of each auxiliary machine out, and taking the contactor signals as operation signals of each auxiliary machine;
installing monitoring points on auxiliary loops of the thermal relays of the auxiliary machines, taking out thermal relay signals of the auxiliary machines, and taking the thermal relay signals as electric signals of the auxiliary machines;
connecting the electrical contacts of the main power supply loop signal, the operation signal and the electrical signal into a DCS (distributed control system) for logic configuration, judging the operation state of each auxiliary machine by reading each signal, and sending an alarm according to the operation state;
the logic of the logic configuration comprises: when the automatic switch signal, the contactor type and the thermal relay signal of the auxiliary machine are all in the on state, the auxiliary machine is in a normal operation state; when the automatic switch signal and the thermal relay signal of the auxiliary machine are in a switch-on state and the contactor signal is in a switch-off state, the auxiliary machine is in a stop operation state; when the automatic switch signal and the contactor signal of the auxiliary machine are in the on state and the thermal relay signal is in the off state, the auxiliary machine is in an electrical fault state; when the thermal relay signal and the contactor signal of the auxiliary machine are in the on state and the automatic switch signal is in the off state, the auxiliary machine is in the electrical power-off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714740.4A CN110410309B (en) | 2019-08-02 | 2019-08-02 | Method for monitoring running state of auxiliary machine of large compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714740.4A CN110410309B (en) | 2019-08-02 | 2019-08-02 | Method for monitoring running state of auxiliary machine of large compressor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110410309A CN110410309A (en) | 2019-11-05 |
| CN110410309B true CN110410309B (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910714740.4A Active CN110410309B (en) | 2019-08-02 | 2019-08-02 | Method for monitoring running state of auxiliary machine of large compressor unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111271303B (en) * | 2020-01-22 | 2021-01-01 | 西安陕鼓通风设备有限公司 | Oil station electric control system, ventilator unit control system and control method |
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|---|---|---|---|---|
| US5434488A (en) * | 1991-12-20 | 1995-07-18 | Matsushita Electric Industrial Co., Ltd. | Device for preventing the burning of a coil for a brushless motor and capable of controlling the speed of the motor |
| CN2469600Y (en) * | 2001-02-22 | 2002-01-02 | 张顺希 | Automatic protecting device of air compressing machine |
| CN1495433A (en) * | 2002-09-19 | 2004-05-12 | System and method for detecting open-phase of compressor system | |
| EP2154778A1 (en) * | 2007-06-07 | 2010-02-17 | Mitsubishi Electric Corporation | Electric motor controller |
| CN101738974A (en) * | 2009-12-17 | 2010-06-16 | 四川中鼎自动控制有限公司 | System for monitoring auxiliary engine state |
| CN203014354U (en) * | 2013-01-05 | 2013-06-19 | 河北钢铁股份有限公司邯郸分公司 | Circuit for controlling auxiliary device of large units |
| US8493012B2 (en) * | 2009-11-17 | 2013-07-23 | Eaton Corporation | Protection relay, electrical switching apparatus, and system for determining and outputting fault current available at a load and incident energy or personal protective equipment level operatively associated therewith |
| CN104793610A (en) * | 2015-05-08 | 2015-07-22 | 华北电力科学研究院有限责任公司 | Method and device for determining parameters of feed forward controller of coordination system |
| CN106685311A (en) * | 2016-12-27 | 2017-05-17 | 中科合成油工程股份有限公司 | Low-tension motor general control circuit and method based on programmable protector |
-
2019
- 2019-08-02 CN CN201910714740.4A patent/CN110410309B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434488A (en) * | 1991-12-20 | 1995-07-18 | Matsushita Electric Industrial Co., Ltd. | Device for preventing the burning of a coil for a brushless motor and capable of controlling the speed of the motor |
| CN2469600Y (en) * | 2001-02-22 | 2002-01-02 | 张顺希 | Automatic protecting device of air compressing machine |
| CN1495433A (en) * | 2002-09-19 | 2004-05-12 | System and method for detecting open-phase of compressor system | |
| EP2154778A1 (en) * | 2007-06-07 | 2010-02-17 | Mitsubishi Electric Corporation | Electric motor controller |
| US8493012B2 (en) * | 2009-11-17 | 2013-07-23 | Eaton Corporation | Protection relay, electrical switching apparatus, and system for determining and outputting fault current available at a load and incident energy or personal protective equipment level operatively associated therewith |
| CN101738974A (en) * | 2009-12-17 | 2010-06-16 | 四川中鼎自动控制有限公司 | System for monitoring auxiliary engine state |
| CN203014354U (en) * | 2013-01-05 | 2013-06-19 | 河北钢铁股份有限公司邯郸分公司 | Circuit for controlling auxiliary device of large units |
| CN104793610A (en) * | 2015-05-08 | 2015-07-22 | 华北电力科学研究院有限责任公司 | Method and device for determining parameters of feed forward controller of coordination system |
| CN106685311A (en) * | 2016-12-27 | 2017-05-17 | 中科合成油工程股份有限公司 | Low-tension motor general control circuit and method based on programmable protector |
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| CN110410309A (en) | 2019-11-05 |
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