CN104251957A

CN104251957A - Coke oven sliding contact wire fault position detection method

Info

Publication number: CN104251957A
Application number: CN201310258816.XA
Authority: CN
Inventors: 季益龙
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2014-12-31

Abstract

The invention relates to a coke oven sliding contact wire fault position detection method. The method is characterized in that: a detection circuit comprises a resistor R, a capacitor C, a relay J, a diode LED and 5G7556 double monostabillity timing circuits, in the detection circuit, a fluctuation threshold of a detection voltage is set, when fluctuation is greater than/smaller than the threshold, alarming is carried out, and the locomotive position is recorded instantly and is sent to a fault position database for recording. The method is simple, convenient, easy to operate and can be realized at low cost; the method can accurately record the position of the sliding contact wire with poor contact, recording is carried out, quality of the power source of the sliding contact wire is further monitored, and alarming is carried out at a part of which the value surpasses the set value.

Description

A kind of method that coke oven trolley abort situation detects

Technical field

The present invention relates to Electrical Control Technology, be affect by trolley for coke-oven locomotive, cause three-phase voltage to occur deviation, and cause the defect that opertaing device phase shortage is damaged, belong to automation field.

Background technology

In coke oven production technology, the power supply of mobile vehicle is introduced and is all imported by trolley, in normal trolley Controlling Technology, power quality problem is little, but coke oven trolley pedestal is by the impact of coking furnace shaft high temperature deformation, add trolley self expanded by heating, trolley is caused to be out of shape very serious, because it is very serious that trolley faults itself causes coke oven to produce affected situation, in coke oven technique, a lot of enterprise adopts weekly the form of periodical repair, strengthening maintenance is carried out to coke oven for iron, especially the conversion that Seasonal conversion difference variation is larger, the maintenance of trolley is a requisite project, but in actual inspection process, substantially be all rely on manually to carry out confirming trolley, such repair method very not science, more fundamentally can not find the position that the contact of trolley is bad, cause maintenance not exclusively, fault still takes place frequently.

Summary of the invention

The object of the invention is to: invent a kind of method, can record the trolley position that contact is bad, line item of going forward side by side, monitors the power quality of trolley simultaneously, reports to the police in time to the position exceeding setting value.

Because the objective environment in coke oven region, cause the trolley that can use in general areas, can not normally use in coke oven region, it is the same that erect image is analyzed above, the pedestal body of heater of trolley self just there will be thermal expansion deformation, trolley is subject to the impact of coke oven high temperature and environment temperature simultaneously, occur that temperature distortion appears in trolley, and especially when Seasonal conversion, change obvious especially, add coke oven Regional Acid seriously corroded, cause the machinery and the electric device corrosion that discharge trolley distortional stress, more exacerbate trolley distortion serious.

Be out of shape serious region at trolley must make a record, safeguard Deng when overhauling, the mode introducing power supply from locomotive can be known, coke-oven locomotive is in operation speed generally than very fast, although many times equipment does not stop, but occurred the voltage fluctuation of moment, this method is exactly the position that record exceedes setting voltage threshold, ready for overhauling.

The data general record of locomotive operation track has two kinds: one is commonly called as coding cable, it is exactly gray count cable, a kind of recording mode being photoelectric encoder and coordinating positioning address code, regardless of which kind of mode, to whole stroke, each point accurately can reflect the particular location of trolley, at locomotive in actual motion, if can be diagnosed in time in each trouble spot, record the address of breaking down simultaneously, just can the particular location of direct trolley, in order to multiple spot detects, set up a database, adopt the function be shifted one by one, database is sent in out of order for detection address, manually to print, as the foundation of maintenance.

Trouble spot is detected, adopt the method testing circuit detecting change in voltage, because the voltage of trolley introduces locomotive by current-collector, the most common fault is exactly trolley distortion, cause with current collector contact bad, and there is the excessive or loose contact of contact resistance, cause three imbalances or the phase shortage of introducing locomotive.In testing circuit, setting detects the threshold value of voltage fluctuation, when fluctuation is greater than this threshold value, makes and reporting to the police and instantaneous record locomotive position value, send into abort situation database, carry out record.

To achieve these goals, technical scheme of the present invention is as follows, described testing circuit comprises the two mono-stable timing circuit of resistance R, electric capacity C, relay J, diode (LED) and 5G7556, in testing circuit, setting detects the threshold value of voltage fluctuation, when fluctuation is greater than/is less than this threshold value, makes and reporting to the police and instantaneous record locomotive position value, send into abort situation database, carry out record.

As a modification of the present invention, it is described when supply voltage rises fluctuation, the trigger set voltage of 5G7556 also rises, when this trigger voltage rises to higher than when electric capacity C1 preserving magnitude of voltage, F2 is set and is output into high level, the luminous indication warning of LED2, relay J 2 adhesive, the auxiliary contact of relay sends this signal into PLC; When supply voltage drop fluctuation, the reset threshold voltage of 5G7556 drops too, when this threshold values is lower than the voltage that electric capacity C1 preserves, F1 is reset and exports as low level, LED1 luminescence instruction, relay J 1 adhesive, the auxiliary contact of relay sends this signal into PLC;

When PLC sent into by the auxiliary contact of relay J 1, J2, PLC with J1, J2 for trigger pip, immediately a database is sent in locomotive position, this database has Pulse Shift function, each J1, J2 are that trigger pip moves one suitable backward for database file, and this database overhauls foundation exactly;

LED1 and LED2 is once luminous alarm, and after manual confirmation, Push switch AN1 and AN2 extinguishes.

The method is simple, convenient, and be easy to operation, cost is lower; The method energy accurate recording contacts bad trolley position, and line item of going forward side by side is monitored the power quality of trolley simultaneously, reports to the police in time to the position exceeding setting value.

Accompanying drawing explanation

Fig. 1 voltage fluctuation Cleaning Principle schematic diagram;

In figure, A is that trolley introduces locomotive voltage through transformation and the sampling voltage after arranging; In figure, 5G7556 is two mono-stable timing circuits.

Embodiment

?in order to deepen the understanding of the present invention and understanding, below in conjunction with the drawings and specific embodiments, the present invention will be described in detail and introduce.

Power supply, locomotive is introduced by current collector for trolley, sampling voltage is gone in total input-wire side, pass through step-down, rectification, send into this pick-up unit, testing circuit of the present invention is mainly made up of one piece of 5G7556 pair of mono-stable timing circuit, and its left one side of something forms power supply decline surge detection circuit, and right one side of something forms power supply rising fluctuation testing circuit.Working power just directly takes from circuit-under-test system, and this power supply is again monitored object simultaneously.

Under normal circumstances, the center head current potential of W2 be adjusted to be slightly less than voltage (Vdd----Vss) 2/3rds, W1 center head be adjusted to a little more than voltage (Vdd----Vss) 1/3rd, click switch AN1 make F1 export high level, LED1 does not work, relay J 1 not adhesive; Click switch AN2 and make F2 output low level, LED2 does not work, relay J 2 not adhesive.C1 can make the current potential of TH1 not affect by mains fluctuations, and same C2 can make the current potential of TH2 not affect by mains fluctuations.

When supply voltage drop fluctuation, the reset threshold voltage of 7556 drops too, and when this threshold values is lower than the voltage that C1 preserves, F1 is reset and exports as low level, LED1 luminescence instruction, and relay J 1 adhesive, the auxiliary contact of relay sends this signal into PLC.

When supply voltage rises fluctuation, the trigger set voltage of 7556 also rises.When this trigger voltage rises to higher than when C1 preserving magnitude of voltage, F2 is set and is output into high level, the luminous indication warning of LED2, and relay J 2 adhesive, the auxiliary contact of relay sends this signal into PLC.

When PLC sent into by auxiliary contact for relay J 1, J2, PLC with J1, J2 for trigger pip, immediately a database is sent in locomotive position, this database has Pulse Shift function, and each J1, J2 are that trigger pip moves one suitable backward for database file.This database overhauls foundation exactly.

LED1 and LED2 is once luminous alarm, and after manual confirmation, Push switch AN1 and AN2 just can extinguish.

It should be noted that above-described embodiment is only preferred embodiment of the present invention; be not used for limiting protection scope of the present invention; equivalent replacement done on the basis of the above or substitute and all belong to protection scope of the present invention, protection scope of the present invention is as the criterion with claims.

Claims

1. the method for a coke oven trolley abort situation detection, it is characterized in that, described testing circuit comprises the two mono-stable timing circuit of resistance R, electric capacity C, relay J, diode (LED) and 5G7556, in testing circuit, setting detects the threshold value of voltage fluctuation, when fluctuation is greater than/is less than this threshold value, makes and reporting to the police and instantaneous record locomotive position value, send into abort situation database, carry out record.

2. the method for a kind of coke oven trolley abort situation detection according to claim 1, it is characterized in that, it is described when supply voltage rises fluctuation, the trigger set voltage of 5G7556 also rises, when this trigger voltage rises to higher than when electric capacity C1 preserving magnitude of voltage, F2 is set and is output into high level, the luminous indication warning of LED2, relay J 2 adhesive, the auxiliary contact of relay sends this signal into PLC; When supply voltage drop fluctuation, the reset threshold voltage of 5G7556 drops too, when this threshold values is lower than the voltage that electric capacity C1 preserves, F1 is reset and exports as low level, LED1 luminescence instruction, relay J 1 adhesive, the auxiliary contact of relay sends this signal into PLC;