The belt conveyer automatic takeup
Technical field
The present invention relates to a kind of belt conveyer automatic takeup, especially a kind of automatic takeup that adopts hydraulic wireline winch tensioning adhesive tape.
Background technology
Adhesive tape tensioning control setup is the chief component of belt conveyer, its effect is when conveyer is worked, guarantee that adhesive tape has enough tension force, when starting, braking and normal operation, making has required friction force and unlikely skidding between adhesive tape and the driving drum, limit adhesive tape simultaneously and prevent the adhesive tape spreading in the sag that each supports between carrying roller.Domestic employed belt conveyer tightening device adopts hydraulic actuating cylinder as tension element more at present, though this hydraulic actuating cylinder tightening device can be regulated the adhesive tape tensile force, satisfies adhesive tape in the different requirement of the required tensile force of starting, braking and nominal situation.But also exist many weak points: hydraulic actuating cylinder is subjected to structural limitations that bigger stroke of tension can not be arranged, so this hydraulic actuating cylinder tightening device setting range is little, only is applicable to short-range belt conveyer; Because hydraulic actuating cylinder is in high pressure conditions for a long time, cause that sealing member and hydraulic part damage, system leak, cause the accident of influence safety in production such as the adhesive tape tensile force sharply descends, skids, wearing and tearing to take place; The hydraulic actuating cylinder tightening device can't be adjusted the speed of tensioning adhesive tape; If electrical controller breaks down, will cause whole tightening device cisco unity malfunction.
Summary of the invention
Purpose of the present invention overcomes above-mentioned the deficiencies in the prior art exactly, provide that a kind of stroke of tension setting range is big, tensile force control accurately, the steady adjustable belt conveyer automatic takeup of tensioning speed.
Tension monitor, hydraulic efficiency gear and hydraulic wireline winch have been the present invention includes.Hydraulic wireline winch includes hydraulic wireline winch motor, latching device, coupler and winch drum.Latching device is made up of locking cylinder and a series of friction lining, by friction lining hydraulic wireline winch is implemented braking fast and accurately and can not made the hydraulic wireline winch cylinder that the reversing phenomenon takes place, and realizes that tensile force is stepless adjustable, makes that the adjustment fluctuation of tensile force is little.
Tension monitor includes dynamometry oil cylinder, pressure sensor, shutoff valve and compression indicator.The dynamometry oil cylinder is to adopt the single action piston cylinder, and its rodless cavity oil inlet is stopped up, and aie escape valve is housed above rodless cavity, and the aie escape valve of a band pressure gauge joint then is housed above rod chamber.Shutoff valve is connected with the rod chamber oil inlet of dynamometry oil cylinder through pressure sensor, and compression indicator is connected on the relief port of dynamometry cylinder rod chamber.
Hydraulic efficiency gear includes Hydraulic Pump, solenoid directional control valve, by pass valve, hand change over valve, hydraulic control one-way valve, electromagnetic proportion relief valve, one-way throttle valve, check valve, flow regulating valve, fuel tank and oil circuit.The oil outlet of Hydraulic Pump links to each other with the dynamometry cylinder rod chamber of tension monitor, rod chamber and this three part of hydraulic wireline winch driving loop of hydraulic wireline winch locking cylinder respectively through check valve.Drive on the loop at hydraulic wireline winch, connecting solenoid directional control valve and hand change over valve, left side position function outlet (also claiming the A mouth) serial connection hydraulic control one-way valve, electromagnetic proportion relief valve and the check valve and the flow regulating valve in parallel of hand change over valve are connected with the clickwise inlet (also claiming the A mouth) of hydraulic wireline winch motor again; The right position function outlet (also claiming the B mouth) of hand change over valve is linked on the left-hand revolution inlet (also claiming the B mouth) of hydraulic wireline winch motor by one-way throttle valve.
Winch drum is installed on the hydraulic wireline winch base, and the hydraulic wireline winch motor is installed to the winch drum side by coupler, and latching device is installed in the opposite side of winch drum, locks by locking cylinder.
The present invention also includes electrical controller, and this electrical controller includes mode of operation knob, Programmable Logic Controller, analog digital energy converter, digital simulation energy converter and signal amplifier.The mode of operation knob can be selected in automatic, manual two kinds of mode of operations.The analog digital energy converter receives the signal from pressure sensor in the tension force control monitor unit, becomes digital signal and delivers in the Programmable Logic Controller.The switching of each electromagnetic valve of signal part direct control of Programmable Logic Controller output, output another part signal then converts to and proportional voltage of this digital quantity or current signal through the digital simulation energy converter, and through after the signal amplifier amplification, the regulated quantity of control electromagnetic proportion relief valve.
The present invention adopts hydraulic wireline winch to carry out the tensioning action, can realize the adhesive tape auto-tensioning in big stroke range according to the needs storage rope of the actual stroke of tension of user.Behind belt conveyer starting and normal operation, the present invention implements braking to hydraulic wireline winch, to keep the tensile force of adhesive tape.Hydraulic efficiency gear quits work subsequently, is in passive state, can stop like this because of sealing member, Hydraulic Elements damage and system leak caused adhesive tape tensile force descends, accidents such as adhesive tape skids, wearing and tearing take place.And when hang-up or power failure, tightening device can be realized autobrake, and still can guarantee the adhesive tape in tension reliably this moment.
In the hydraulic efficiency gear of the present invention, before hydraulic wireline winch motor A mouth, connect check valve in parallel and flow regulating valve and one-way throttle valve is installed before the B mouth and be used for the rotating speed of modulated pressure winch, can realize quick tensioning of adhesive tape and mild lax function, the speed of response of having guaranteed whole device with and safety performance.Be provided with hand change over valve in the hydraulic efficiency gear of the present invention, lax or tensioning adhesive tape that can be artificial, behind the electrical controller et out of order, whole automatic takeup still can normal operation, also helps the maintenance of belt conveyer complete machine.
The present invention is applicable to big whole core belt conveyer of percentage elongation and long distance belt conveyor.Stroke of tension setting range of the present invention is big, and tensile force control is accurate, and tensioning speed is steadily adjustable, long service life, and the reliability height has manual, automatic two kinds of mode of operation.
Description of drawings
Fig. 1 is hydraulic efficiency gear of the present invention and tension monitor schematic diagram;
Fig. 2 is an overall installation structural representation of the present invention;
Fig. 3 is an electrical controller functional block diagram of the present invention.
Among the figure: 1, fuel tank, 2, Hydraulic Pump, 3, by pass valve, 4, check valve, 5, shutoff valve, 6, pressure sensor, 7, the hydraulic wireline winch locking cylinder, 8, winch drum, 9, belt conveyer tensioning dolly, 10, adhesive tape, 11, the dynamometry oil cylinder, 12, tensioning dolly right pulley, 13, compression indicator, 14, the dynamometry cylinder pedestal, 15, steel rope, 16, fixed pulley, 17, the fixed pulley base, 18, tensioning dolly left chain wheel, 19, coupler, 20, one-way throttle valve, 21, the hydraulic wireline winch motor, 22, flow regulating valve, 23, check valve, 24, electromagnetic proportion relief valve, 25, hydraulic control one-way valve, 26, hand change over valve, 27, solenoid directional control valve, 28, the hydraulic wireline winch base, 29, hydraulic efficiency gear, 30, oil pipe, 31, cable, 32, electrical controller, 33, the belt conveyer frame.
The specific embodiment
Dynamometry oil cylinder (11) is by common single action piston cylinder repacking, and the rodless cavity oil inlet is stopped up, and aie escape valve is housed above rodless cavity, and the aie escape valve of a band pressure gauge joint then is housed above rod chamber.
Shutoff valve (5) is connected with the rod chamber oil inlet of dynamometry oil cylinder (11) through pressure sensor (6), and compression indicator (13) is connected on the relief port of dynamometry cylinder rod chamber.In the permanent tension force operational process of adhesive tape tensioning and conveyer, tension monitor provides in real time, conveyor belt tension value accurately, and feeds back to electrical controller, comes modulated pressure device and hydraulic wireline winch to realize accurate adjusting to the adhesive tape tensile force by control program.
The oil outlet of Hydraulic Pump (2) through by pass valve (3), check valve (4) respectively with tension monitor, the rod chamber of hydraulic wireline winch locking cylinder (7) and hydraulic wireline winch drive this three part of loop and link to each other.Drive on the loop at hydraulic wireline winch, connecting solenoid directional control valve (27) and hand change over valve (26), A mouth serial connection hydraulic control one-way valve (25), electromagnetic proportion relief valve (24) and the check valve (23) and the flow regulating valve (22) in parallel of hand change over valve (26), the A mouth with hydraulic wireline winch motor (21) is connected again.The B mouth of hand change over valve (26) is linked on the B mouth of hydraulic wireline winch motor (21) by one-way throttle valve (20).
The present invention can select automatically and manual two kinds of mode of operation.
Automatic mode of operation:, set the size of adhesive tape starting tensile force, normal tensile force by initial parameter according to the requirement of conveyer tensile force.Wait for the conveyer main signal, receive the signal that allows starting after, under the control of control program, finish starting section, normal target phase to the control of the permanent tension force of adhesive tape and by the starting tensile force to the flexible control that changes of normal operation tensile force.After its detailed process is the pump starting, the solenoid directional control valve commutation, the pressure of control output signal control electromagnetic proportional valve able to programme, make adhesive tape reach the starting tensile force, after the starting of time-delay conveyer such as a period of time, the tension force the when pressure of Controlled by Programmable Controller electromagnetic proportional valve makes adhesive tape reach conveyer normally to move.When reaching the normal operating condition of adhesive tape, hydraulic wireline winch is implemented braking, to keep the tension force of adhesive tape.Hydraulic Station quits work subsequently, and whole hydraulic efficiency gear is in passive state.After this when measuring tensile force, the tension force control monitor unit descends, then reset hydraulic efficiency gear, drive hydraulic wireline winch tensioning adhesive tape and do not exceed the error allowed band, and enter the tension force monitor state until tensile force, send adhesive tape signal out of service up to conveyer, whole device quits work.
Manual work mode: when electrical controller of the present invention breaks down or in order to safeguard, overhaul the belt conveyer complete machine, in the time of can being transformed into manual state to the mode of operation knob, control adhesive tape tensioning or lax artificially, and regulate the adhesive tape tensile force according to the display data of tension force control monitor unit.