CN101704448A

CN101704448A - Protection of longitudinal rupture of adhesive tape of belt type conveyer

Info

Publication number: CN101704448A
Application number: CN200910224457A
Authority: CN
Inventors: 谭孝蛟
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-21
Filing date: 2009-11-21
Publication date: 2010-05-12

Abstract

The invention relates to a method for protecting the longitudinal rupture of an adhesive tape of a belt type conveyer, which solves the defect and the lagging of a monitoring device in the prior art and the defect of larger loss caused by the rapid diffusion of the longitudinal rupture of the adhesive tape because of sundries in materials or the falling-off of a machine frame and the like. The method is characterized by comprising the steps of: monitoring the current change amplitude of the current of a motor of the conveyer in unit time and the displacement situation of the counterweight of a middle counterweight type conveyer after filtering situations of which the influence enables the current of the motor of the conveyer to generate sudden changes, such as the abnormal situations of the obstruction of overlarge material flows and a material falling pipe on the adhesive tape of a previous stage, the severe deviation of the adhesive tape and the like, judging that the adhesive tape is ruptured when the abnormal situations do not transmit a signal and the change amplitude of the current of the motor of the conveyer in the unit time exceeds a set value or the counterweight of the middle counterweight type conveyer generates larger displacement, and transmitting an alarm or trip signal. The invention lowers the labor strength of working personnel and enhances the safety coefficient of equipment.

Description

The conveyor belt running protecting longitudinal rupture

Technical field: the guard method that the conveyor belt running that the present invention relates to use on a kind of industrial and mining enterprises operating line is torn.

Background technology: belt conveyer of the prior art; its objective is material; as coal, ore, etc. the conveying of changing places; its structure is by drive motor driving wheel flower wheel; frame and adhesive tape placed on it, formations such as take-up device, its weak point are because no actv. monitoring and protecting device; reasons such as foreign material in the material or frame come off cause adhesive tape to tear, and lead to bigger loss rapidly.

Summary of the invention: technical solution of the present invention is:

A: establish the junk pipe plug plug signal of the highest limited signal of normal logistics and adhesive tape at the corresponding levels in the work of higher level's travelling apron, and the offset signals of adhesive tape is an abnormal signal.

B: after conveyer at the corresponding levels normally starts 5～10 seconds, begin to gather the motor operating current value, delaying time, (time is adjustable) compares after 1,2,3 second, press the normal attribute of conveyer and set alarming value N (1-3) and trip value M (1-3), promptly set the normal fluctuation value of current of electric in the following unit time of normal circumstances.

C: report to the police or trip value according to current of electric normal fluctuation in the unit time of setting.When abnormal signal does not move, and monitoring and protecting takes place to report to the police or trip signal, and the expression travelling apron damage might take place or tears.

D: during normal operation, the belt speed of travelling apron can be similar to regards uniform motion as, does not move and the middle counter weight type adhesive tape of conveyer as abnormal signal, and bigger displacement takes place counterweight, also can be judged to adhesive tape damage formula and tear.

The advantage that the present invention has compared to existing technology is: the maximum limit value of the conveying logistics of setting with adopt the value rangeability contrast of current of electric unit time, and cause that junk pipe close that the conveyer electric current changes hinders or situation such as rubber belt from deviating after.As whether normally the electric current variation or the counterweight position Duan Shineng that send above setting value accurately judge travelling apron operation.Thereby correct warning or shutdown signal in time take place, reduced staff's labour intensity, reduce the damage of equipment, saved cost, improved the safety factor of equipment.

Description of drawings: this accompanying drawing is the overall logic figure of invention, and scope is micro controller system or PLC shown in the dotted line wherein (28).

Real formula mode: the present invention provides embodiment in conjunction with the accompanying drawings: the belt conveyer electric motor starting, sending actuation signal (1) links to each other with door (26), (27) with delay timer (2), All Alerts or trip signal locking in the time-delay period, after time-delay, current transformer (3), current transducer (4) collection carry the motor current signal value to micro controller system or PLC (28); Micro controller system or PLC (28) start working, and when current value surpasses the highest limit of electrical motor (11), (12), send and report to the police or shutdown.Motor current value compares in adder (8), (9), (10) respectively with back time period value successively through after delay timer (5), (6), (7) time-delay three times, as when contrasting difference and surpassing motor current rangeability setting value (14), (16), (18) through or door (21) send alerting signal (26), surpass (13), (15), (17) through or trip signal (28) takes place during door (20).When surpassing set spacing, belt counterweight spacing (19) sends warning (26) and trip signal (27).As promptly having above the run signal or the adhesive tape generation sideslip (secondary sideslip) of set amount or stop up in the period that delay timer (23) links to each other and door (24), (25) can locking be reported to the police (26) or tripped (27) signal output at higher level's adhesive tape or equipment at abnormal signal (22).Adopt micro controller system or Programmable Logic Controller (PLC) or dispersing control system (DCS) to realize that this logic compares, the current of electric tripping alarm setting value (11) among the present invention, (12) current of electric rangeability setting value (13-18) and signal lag conveyer (5), (6), (7) delay timer (2), delay timer (23) all can be adjusted according to operating mode; Real line is an analog quantity, and virtually connecting line is data line.

Claims

1. the guard method of a conveyor belt running longitudinal tear is characterized in that; Set the spacing value of the maximum logistics capacity under the belt conveyer normal operation and influence the factor that big current break took place in the conveyer current of electric unit time: signals such as junk pipe plug plug and rubber belt from deviating are abnormal signal, under the condition of setting maximum logistics moving belt, set the maximum electric current changing value of motor operation in the unit time according to the conveyer operating mode.Belt conveyer start stable after, begin to gather the time-delay of electric current running current value and compare respectively with the current value of unit time thereafter.Pass relatively with the motor time of run is consistent by this rule.When abnormal signal does not send signal, start when relatively difference is greater than the alarming value set at it and to report to the police, send trip signal during greater than the trip value set,, middle counterweight sends warning and trip signal during (19) signal of position if transfiniting.

2. it is characterized in that according to the conveyor belt running protecting longitudinal rupture method described in claims 1: conveyer startup operation electric motor starting signal (1) is exported (26) with delay timer (2) and with door (24), (25) tripping operation, the output (27) of reporting to the police links to each other, and locking is excessive warning that causes of current of electric (27) or tripping operation (26) when starting; Current transformer (3) and current transducer (4) and the highest limit tripping operation (11) are reported to the police (12) or door (20,21) links to each other with door (24,25) tripping operation (26) warnings (27); Current transformer (3) and current transducer (4) and delay timer (5,6,7) adder (8,9,10) the high limit of tripping operation (13,15,17) the high limit of warning (14,16,18), with door (24), (25) tripping operation outputs (26), warning output (27) links to each other; Middle counter weight type conveyer counterweight limit signal (19) with link to each other with door (20,21) tripping operation output (26) output of reporting to the police, abnormal signal (22) and delay timer (23) are exported (26) warning and are exported and link to each other with tripping with door (20,21).

3. according to the conveyor belt running protecting longitudinal rupture method described in claims 2; it is characterized in that current of electric tripping operation setting value (11) alarming value (12), current of electric rangeability setting value (13-18) and signal lag device (2,5,6,7,23) are all adjustable.