CN104843430A - Non-integral pitching arm type stacker-reclaimer belt tensioning system and method - Google Patents
Non-integral pitching arm type stacker-reclaimer belt tensioning system and method Download PDFInfo
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- CN104843430A CN104843430A CN201510258823.9A CN201510258823A CN104843430A CN 104843430 A CN104843430 A CN 104843430A CN 201510258823 A CN201510258823 A CN 201510258823A CN 104843430 A CN104843430 A CN 104843430A
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- belt
- belt tensioning
- tensioning drum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
- B65G2203/042—Sensors
Abstract
A non-integral pitching arm type stacker-reclaimer belt tensioning system comprises a belt, a turnabout drum, a tensioning drum, a hydraulic cylinder matched with the tensioning drum, an electromagnetic proportional valve and a PLC, wherein the turnabout drum and the tensioning drum are respectively symmetrically disposed at two ends of the belt, and the turnabout drum is fixed on the cantilever crane of a stacker-reclaimer; the belt surrounds the turnabout drum and the tensioning drum, the tensioning drum is disposed at the tail of the cantilever crane and moves along with the pitching of the cantilever crane, and the moving direction of the tensioning drum is vertical to the pitching direction of the cantilever crane; the piston rod of the hydraulic cylinder is hinged to the tensioning drum, and the electromagnetic proportional valve is connected with the oil port of the hydraulic cylinder through an oilway; the PLC outputs a control signal to the electromagnetic proportional valve to control the proportional electromagnet of the electromagnetic proportional valve to generate proportional output quantity so as to drive the piston rod to move, and central line of the moving belt is kept coinciding with the central line of the turnabout drum. The invention further discloses a non-integral pitching arm type stacker-reclaimer belt tensioning method. The non-integral pitching arm type stacker-reclaimer belt tensioning system and method is flexible in control manner, time saving and labor saving.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to the arm-type stacker-reclaimer belt tensioning system of a kind of non-integral pitching and tensioning method.
Background technology
Stacker-reclaimer (stocker and reclaimer) is a kind of continuous loading-unload machine efficiently, be mainly used in the Work places that bulk handling harbour, steel plant, large-size thermal power plant, coke-oven plant, cement mill and mine etc. are provided with bulk cargo stockyard, for carrying out the handling of ore (sand) or other powdered object.Be subject to the restriction of the stressed and larger gravity center shift of device structure, radius of turn is greater than the large-scale of 50M or super-huge stacker-reclaimer generally all adopts non-integral pitching arm type structure.
Jib belt feeder is the important process mechanism of the arm-type stacker-reclaimer of non-integral pitch, and wherein load-transfer device is the driving component of jib belt feeder, is again load-carrying element simultaneously.In order to provide the necessary tension force of load-transfer device, limit transport band sag between carrying roller, ensures the normal operation of belt feeder, must arrange tightening device in jib belt feeder.Traditional arm-type stacker-reclaimer adopts the heavy formula tightening device of pendant usually, below belt conveyer, namely put the tensioning that tensioning weight realizes belt.
But in the heavy formula tightening device of pendant, tensioning weight is connected by steel rope with between belt tensioning drum.The very difficult maintenance of making a concerted effort acting on belt tensioning drum two ends in the process of jib pitching is equal, cause the two ends of belt tensioning drum cannot keep synchronized movement, to be applied to the tensions constant on belt tensioning drum by two ends steel rope due to tensioning weight, the different moving velocity in cylinder two ends can cause belt tensioning drum to offset, cause and occur slipping of the belt sideslip, safety misadventure occurs.In addition; because in the compensation plastic deformation of belt and pitching process, the position of belt tensioning drum and the length of belt are all constantly changing; so; if once belt tensioning drum offsets; can only shut down and manually be regulated by jack; low and the tuningout weak effect of efficiency, is difficult to the demand meeting the operation of equipment large discharge.
Summary of the invention
The arm-type stacker-reclaimer belt tensioning system of a kind of non-integral pitching of the present invention, is difficult to keep synchronized movement in order to solve belt tensioning drum two ends in prior art, skew easily occurs and causes slipping of the belt sideslip and the problem regulating difficulty.
Technical scheme provided by the invention is, the arm-type stacker-reclaimer belt tensioning system of a kind of non-integral pitching, comprise belt, bend pulley, a pair belt tensioning drum, the pair of hydraulic cylinders be equipped with described belt tensioning drum and electromagnetic proportional valve and programmable logic controller (PLC), wherein, described bend pulley and belt tensioning drum are symmetricly set on described belt two ends respectively, and described bend pulley is fixedly installed on the jib of stacker-reclaimer; Described strap lug is around described bend pulley and belt tensioning drum, and described belt tensioning drum is arranged on the front jib afterbody of stacker-reclaimer and moves along with the pitching of jib, and its moving direction is mutually vertical with the direction of jib pitching; Piston rod and the described belt tensioning drum of described hydraulic actuating cylinder are hinged, and described electromagnetic proportional valve connects the hydraulic fluid port of described hydraulic actuating cylinder by oil circuit; Described programmable logic controller (PLC) outputs control signals to described electromagnetic proportional valve, produce proportional output to drive described piston rod action to control its proportion electro-magnet, the line of centers remaining on belt described in moving process overlaps with the line of centers of described bend pulley.
Further, described clamping system also comprises detecting unit, described detecting unit comprises displacement pickup, and institute's displacement sensors detects the displacement of each described belt tensioning drum respectively and is converted to level signal to export described programmable logic controller (PLC) to poor with the real-time displacement obtaining described a pair belt tensioning drum.
Further, it is characterized in that, described detecting unit also comprises pulling force sensor, and described pulling force sensor continues to detect described belt along pulling force suffered by service direction and is converted to level signal and exports programmable logic controller (PLC) to.
For real-time detected temperatures, oil pressure and liquid level, described detecting unit also comprises oil pressure sensor, level sensor and temperature sensor; Described oil pressure sensor, level sensor and temperature sensor continue oil pressure, liquid level and the temperature in detection oil sources and oil circuit and are converted to level signal to export programmable logic controller (PLC) to.
Further, described programmable logic controller (PLC) is also connected with a man-machine interaction unit; Described man-machine interaction unit receives operation signal and the belt pull of setting and belt tensioning drum position deviation is transferred to described programmable logic controller (PLC); The belt tensioning drum position deviation of setting and described real-time displacement difference compare by described programmable logic controller (PLC), the belt pull of setting and pulling force suffered by described belt are compared generate feedback signal and control the piston rod action that corresponding electromagnetic proportional valve drives described hydraulic actuating cylinder.
Further, be preset with absolute rating group in described programmable logic controller (PLC), described absolute rating group comprises maxim and/or the minimum value that pulling force, described belt tensioning drum offset deviation and described piston rod suffered by liquid level and temperature in oil sources and oil circuit, described belt reclaim distance.
For improving the safety of equipment, also comprise an alarm unit, described alarm unit connects described programmable logic controller (PLC) and receives the output signal of described programmable logic controller (PLC); Maxim in the detected value of described detecting unit and described absolute rating group and/or minimum value compare by described programmable logic controller (PLC), once described detected value exceeds described maxim and/or minimum value, namely described programmable logic controller (PLC) controls described alarm unit and reports to the police.
Further, described belt both sides are also provided with deviation switch; Described deviation switch has two-stage angle; Once belt contacts deviation switch, described deviation switch generates electric signal and exports described programmable logic controller (PLC) to, described programmable logic controller (PLC) generates feedback signal and controls the piston rod action that corresponding electromagnetic proportional valve drives described hydraulic actuating cylinder, keeps the line of centers of belt and the axes normal of described belt tensioning drum; Once described deviation switch deflects to one-level angle, namely generate alerting signal and report to the police; Once described deviation switch deflects to secondary angle, namely generate shutdown signal and export shutdown signal to programmable logic controller (PLC), controlling belt conveyor and shut down.
Preferably, the belt pull of described setting is one-sided 0 to 30 ton, and the displacement difference between described belt tensioning drum is-30mm to+30mm.
The arm-type stacker-reclaimer belt tensioning system of non-integral pitching provided by the present invention, a hydraulic actuating cylinder is respectively fixedly connected with at the both ends of belt tensioning drum, realize the constant tensile control for belt and anti-deviation control simultaneously, avoid and use tensioning weight to carry out tensioning, without the need to manually being adjusted by jack, time saving and energy saving, labour intensity is little and efficiency is high.
The invention also discloses a kind of tensioning method, comprise the following steps:
(1) before the belt conveyor of the arm-type stacker-reclaimer of non-integral pitching runs, to be applied to the pulling force on belt along belt direction of travel by a pair belt tensioning drum by man-machine interaction unit setting hydraulic actuating cylinder, the programmable logic controller (PLC) be connected with described man-machine interaction unit receives setting value; Described programmable logic controller (PLC) outputs control signals to electromagnetic proportional valve, produce with the electromagnet controlling corresponding described electromagnetic proportional valve the piston rod action that proportional output signal drives the described hydraulic actuating cylinder of every side respectively, the pulling force be applied on belt of belt tensioning drum described in each is set between 0-30 ton;
(2) the described belt tensioning drum of side is set to benchmark belt tensioning drum, the described belt tensioning drum of opposite side is set to from belt tensioning drum, by described man-machine interaction unit setting benchmark belt tensioning drum with from the displacement difference between belt tensioning drum, described programmable logic controller (PLC) receives setting value and outputs control signals to electromagnetic proportional valve, the piston rod action of described hydraulic actuating cylinder is driven with the output signal of the electromagnet generation ratio controlling corresponding described electromagnetic proportional valve, keep the invariant position of benchmark belt tensioning drum, regulate the displacement from belt tensioning drum, the line of centers of belt is overlapped with the line of centers of bend pulley, described benchmark belt tensioning drum and be set between-30mm-30mm from the displacement difference between tensioning roller,
(3) belt conveyor of the arm-type stacker-reclaimer of non-integral pitching brings into operation, and the pulling force sensor being arranged on belt side continues to detect belt along pulling force suffered by sense of motion and is converted to level signal and exports described programmable logic controller (PLC) to; Described programmable logic controller (PLC) receives pull force calculation signal and generates feedback signal and exports electromagnetic proportional valve to, produce with the electromagnet controlling corresponding described electromagnetic proportional valve the piston rod action that the output signal of ratio drives described hydraulic actuating cylinder, keep belt consistent with the pulling force setting value of step (1) along pulling force suffered by sense of motion;
(4) be arranged on described benchmark belt tensioning drum and detect the displacement of each described belt tensioning drum respectively from the displacement pickup belt tensioning drum and be converted to level signal and export described programmable logic controller (PLC) to; Described programmable logic controller (PLC) receives the displacement that detects and generates feedback signal and exports electromagnetic proportional valve to, the piston rod action of described hydraulic actuating cylinder is driven with the output signal of the electromagnet generation ratio controlling corresponding described electromagnetic proportional valve, keep the invariant position of benchmark belt tensioning drum, regulate the displacement from belt tensioning drum; Thus keeping described benchmark belt tensioning drum and consistent with the displacement difference setting value of step (2) from the displacement difference between belt tensioning drum, the line of centers of belt overlaps with the line of centers of bend pulley.
Non-integral pitching provided by the present invention arm-type stacker-reclaimer belt tension method has the few and mode advantage flexibly of consumption of natural resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the hydraulic circuit diagram of the arm-type stacker-reclaimer belt tensioning system of non-integral pitching proposed by the invention;
Fig. 2 is the close-up schematic view at A place in Fig. 1;
Fig. 3 is the control principle block diagram of the arm-type stacker-reclaimer belt tensioning system of the pitching of non-integral shown in Fig. 1.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
During normal operation, the main operation scheme of the arm-type stacker-reclaimer of non-integral pitching comprises pitching and rotation.Jib due to stacker-reclaimer is sectional design, so the belt 8 on conveyer must frequently extend according to the attitudes vibration of stacker-reclaimer jib and shorten while forward direction motion, therefore, belt tensioning system is needed to provide a constant tensile force with while ensureing that belt normally runs, the various safety misadventures avoiding belt deviation to bring.That is, clamping system will make the belt run along with the pitching of stacker-reclaimer and rotation once there is sideslip, forces to make the belt of sideslip get back to the run location of setting under the effect of external force or moment of face.
Shown in Figure 1, the arm-type stacker-reclaimer belt tensioning system of the non-integral pitching that the present embodiment proposes realizes primarily of a hydraulic control system.Hydraulic control system mainly comprises as the hydraulic efficiency pressure system pumping plant of pumping source, hydraulic actuating cylinder 3 and hydraulic actuating cylinder 4, and for connecting the oil circuit of pumping plant and hydraulic actuating cylinder.Fuel tank 12, the equipment such as plunger pump 17 and by pass valve 16 as oil sources is provided with, for whole belt tensioning system provides stable power resources in hydraulic efficiency pressure system pumping plant.Hydraulic efficiency pressure system pumping plant is arranged on the Z-type frame crossbeam of heap feeding, has installed safety barrier and cat ladder additional at hydraulic efficiency pressure system pumping plant periphery, the convenient later maintenance for whole hydraulic control system.
The oil circuit of the arm-type stacker-reclaimer belt tensioning system of the non-integral pitching that the present embodiment proposes is drawn and connects power element from hydraulic efficiency pressure system pumping plant, and described power element specifically refers to hydraulic actuating cylinder 3 and hydraulic actuating cylinder 4.The arm-type belt conveyor of non-integral pitching is provided with bend pulley 1 and a pair belt tensioning drum 2-1,2-2.Bend pulley 1 and belt tensioning drum 2-1,2-2 are symmetricly set on belt 8 two ends respectively, and belt 8 is around bend pulley 1 and belt tensioning drum 2.Bend pulley 1 for applying tractive force to belt is fixedly installed on the jib of stacker-reclaimer, and belt tensioning drum 2-1 and 2-2 is arranged on the front jib afterbody of stacker-reclaimer and moves along with the pitching of jib, the moving direction of belt tensioning drum 2-1 with 2-2 is mutually vertical with the direction of jib pitching.Hydraulic actuating cylinder 3 and hydraulic actuating cylinder 4 are equipped with belt tensioning drum 2-1 and 2-2 respectively, and piston rod 3-1 and the belt tensioning drum 2-1 of hydraulic actuating cylinder 3 are hinged, and piston rod 4-1 and the belt tensioning drum 2-2 of hydraulic actuating cylinder 4 are hinged.
In the operation process of stacker-reclaimer, the control of the belt tensioning system that the present embodiment provides mainly comprises two large operations, one is constant tensile control, namely certain pulling force is applied by belt tensioning drum 2-1 and 2-2 along belt transport direction, meet the work requirements of belt, to replace the mode using tensioning weight in prior art; Two for realize anti-deviation control by belt tensioning drum 2-1 and 2-2, namely at the line of centers of the disalignment bend pulley of belt, when namely there is sideslip, the position of adjustment belt tensioning drum 2-1 and 2-2, make to form certain displacement difference therebetween, thus make the direction between belt tensioning drum with belt contrary with belt deviation direction, ensure that the line of centers of belt 8 overlaps with the line of centers of bend pulley in belt tensioning drum moving process.In the belt tensioning system that the present embodiment provides, above two-step is all achieved by hydraulic control cylinder 2-1 and the flexible of 2-2 piston rod.
Specifically, the action of hydraulic actuating cylinder 3 and hydraulic actuating cylinder 4 controls mainly through electromagnetic proportional valve 10 and electromagnetic proportional valve 11, is connected the hydraulic fluid port of described hydraulic actuating cylinder by oil circuit.Specific works process is as follows, and in belt tensioning system, also comprise a programmable logic controller (PLC) 9, programmable logic controller (PLC) 9 exports electric signal, and this electric signal is by electric amplifier and convert corresponding current signal to.This current signal is sent to proportion electro-magnet as input, thus produce and the proportional output of incoming signal to hydraulic actuating cylinder 3 and hydraulic actuating cylinder 4, the flexible drive belt tensioning drum 2-1 of control plunger bar 3-1 and 3-2 and 2-2 action.
In the arm-type stacker-reclaimer belt tensioning system of non-integral pitching, be also provided with detecting unit 50, the test value of detecting unit 50 is one group of input of programmable logic controller (PLC) 9.This detecting unit 50 comprises displacement pickup 7, and displacement pickup 7 detects the displacement of belt tensioning drum 2-1 and 2-2 respectively and is converted to level signal to export described programmable logic controller (PLC) 9 to poor with the real-time displacement obtaining belt tensioning drum 2-1 and 2-2.Also comprise pulling force sensor 6 in detecting unit 50, pulling force sensor 6 continues to detect belt 8 along pulling force suffered by service direction and is converted to level signal and exports programmable logic controller (PLC) 9 to.In addition, also comprising oil pressure sensor, level sensor and temperature sensor in detecting unit with oil pressure, liquid level and the temperature in lasting detection oil sources and oil circuit is converted to level signal and exports programmable logic controller (PLC) 9 to.
Also be connected with a man-machine interaction unit 30 at the input end of programmable logic controller (PLC) 9, man-machine interaction unit 30 as a part for the upper computer be connected with programmable logic controller (PLC) 9, also can independently can be arranged.Man-machine interaction unit 30 receives the operation signal of operating personal and belt pull during the normal work of setting and belt tensioning drum position deviation is converted to electric signal transmission to programmable logic controller (PLC) 9.Namely operation signal is another group input of programmable logic controller (PLC).The dry wet degree of the size of orientation during windrow each due to stacker-reclaimer, the position of blanking, material, the weight of material, material and the not equal factor of the flow of material all can impact the position of belt, so staff can set the alternate position spike between belt tensioning drum 2-1 and belt tensioning drum 2-2 before machine startup, overlap with the line of centers of bend pulley 1 with the line of centers remaining on the front belt 8 of start.
After start, the detected value of belt pull during the normal work of setting and belt tensioning drum position deviation and displacement pickup 7 and pulling force sensor 6 compares by programmable logic controller (PLC) 9, generation feedback signal controls piston rod 3-1 and the 3-2 action that corresponding electromagnetic proportional valve 10 and 11 drives described hydraulic actuating cylinder 3 and 4, and displacement difference when normally working to remain between belt pull and belt tensioning drum 2-1 and 2-2 is consistent with the setting value before start all the time.In actual job process, side hydraulic actuating cylinder is set to benchmark hydraulic actuating cylinder.Example, as a reference point with operator's compartment, hydraulic actuating cylinder 4 on the right side of operator's compartment be set to benchmark hydraulic actuating cylinder and keep the pulling force be applied on corresponding benchmark belt tensioning drum 2-2 to reach setting value, the hydraulic actuating cylinder 3 in left side is set to from hydraulic actuating cylinder, and corresponding belt tensioning drum 2-1 is from belt tensioning drum.When stacker-reclaimer generation pitching or when rotating, be applied to benchmark belt tensioning drum 2-2 and all can change from the pulling force belt tensioning drum 2-1 and position, namely pulling force sensor 6 and displacement pickup 7 can detect the displacement difference between real-time value of thrust and belt tensioning drum 2-1 and 2-2.Now, programmable logic controller (PLC) 9 namely can be corresponding electromagnetic proportional valve 10,11 output signal, by the reciprocating movement of the piston rod of hydraulic control cylinder 3 and 4, belt tensioning drum 2-1 and 2-2 is adjusted to the setting value before start along the belt direction of travel pulling force be applied on belt 8.Simultaneously, keep the invariant position of belt tensioning drum 2-2, a signal is exported to from hydraulic actuating cylinder 3 by programmable logic controller (PLC) 9, control to stretch from the piston rod 3-1 of hydraulic actuating cylinder 3, regulate the position from belt tensioning drum 2-1, to keep benchmark belt tensioning drum 2-2 and consistent with the setting value before start from the displacement difference between belt tensioning drum 2-1, thus realize permanent pulling force and anti-deviation control simultaneously.
For ensureing the safe in operation of equipment, be preset with absolute rating group in programmable logic controller (PLC) 9, this absolute rating group is arranged in programmable logic controller (PLC) 9 by man-machine interaction unit by operating personal.Absolute rating group comprises the limit that the offset deviation of pulling force, belt tensioning drum 2-1 and 2-2 suffered by liquid level in oil sources and oil circuit and temperature, belt 8 and hydraulic actuating cylinder 3,4 piston rod 3-1 and 4-1 reclaim distance.Because the stroke of belt 8 itself is limited, cause belt 8 to rupture for preventing the strength at repeated alternation damaging belt 8 and cause the accident, the span that piston rod 3-1 and 4-1 of hydraulic actuating cylinder 3,4 is applied on belt tensioning drum 2-1 and 2-2 should between 0 ~ 30 ton.And benchmark belt tensioning drum 2-2 and be preferably arranged on-30mm to 30mm from the displacement difference between belt tensioning drum 2-1 interval within.
Programmable logic controller (PLC) 9 is also connected with an alarm unit 40.Buzzer phone can be provided with and other can realize the electronic component of sound and light alarm in alarm unit 40.Alarm unit 40 connects programmable logic controller (PLC) 9 and receives the output signal of programmable logic controller (PLC).Under open state, if the setting value that the detected value of any one in the pulling force sensor in detecting unit 6, displacement pickup 7, temperature sensor, oil pressure sensor, level sensor oversteps the extreme limit in parameter group, programmable logic controller (PLC) 9 i.e. output alarm signal to alarm unit 40 and control its report to the police.
Deviation switch 50 is also provided with in the both sides of belt 8.In the operational process of belt 8, if once there is serious sideslip situation.Namely belt 8 can contact with deviation switch 50.Deviation switch has two-stage angle, and when belt 8 contacts the edger roll of deviation switch 50, the edger roll of deviation switch 50 starts rotation.If the running deviation value of belt 8 continues to strengthen, then extrude edger roll to offset, now deviation switch 50 generates electric signal and exports described programmable logic controller (PLC) 9 to, programmable logic controller (PLC) 9 generates feedback signal and controls corresponding electromagnetic proportional valve 10 and/or 11 drive hydraulic actuating cylinder 3 and/or 4 drive piston rod 3-1 and 4-1 action, keeps the line of centers of belt and the axes normal of a pair belt tensioning drum.The first order angle of deviation switch is 20 degree, and namely when edger roll deflection angle is more than 20 degree, deviation switch generates alerting signal and reports to the police; Second machine angle of deviation switch is 35 degree, and namely when edger roll deflection angle is more than 35 degree, deviation switch 50 outputs signal to programmable logic controller (PLC) 9, and the motor stopping of programmable logic controller (PLC) controls band conveyor dog, avoids occurring safety misadventure.In addition, multiple safety valve 20(such as electromagnet cut off valve in belt tensioning system, is also provided with), safety valve 20 is than the fast response time of electromagnetic proportional valve, and when a large amount of mineral aggregate of avoiding caving in suddenly is fallen in large arm, the reacted large arm that causes slowly of apportioning valve is damaged.
The arm-type stacker-reclaimer belt tensioning system of the non-integral pitching that the present embodiment provides, a hydraulic actuating cylinder is respectively fixedly connected with at the both ends of belt tensioning drum, realize constant tensile control and anti-deviation control by hydraulic cylinder piston rod is flexible simultaneously, avoid and use tensioning weight to carry out tensioning, without the need to manually being adjusted by jack, time saving and energy saving, labour intensity is little and efficiency is high.
The invention also discloses a kind of non-integral pitching arm-type stacker-reclaimer belt tension method, comprise the following steps:
(1) before the belt transmission mechanism of the arm-type stacker-reclaimer of non-integral pitching runs, to be applied to the value of thrust on belt 8 along belt 8 service direction by belt tensioning drum 2-1 and 2-2 by man-machine interaction unit setting hydraulic actuating cylinder 3 and 4, the programmable logic controller (PLC) 9 be connected with described man-machine interaction unit receives setting value; Described programmable logic controller (PLC) 9 outputs control signals to electromagnetic proportional valve 10 and 11, produce with the electromagnet controlling corresponding described electromagnetic proportional valve 10 and 11 piston rod 3-1 and the 4-1 action that proportional output signal drives hydraulic actuating cylinder 3 and 4 respectively, belt tensioning drum 2-1 and the 2-2 pulling force be applied on belt is set between 0-30 ton;
(2) the described belt tensioning drum of side is set to benchmark belt tensioning drum (2-1 or 2-2), the described belt tensioning drum of opposite side arranges and is from belt tensioning drum, keeps the invariant position of benchmark belt tensioning drum; By described man-machine interaction unit setting benchmark belt tensioning drum with from the displacement difference between belt tensioning drum, described programmable logic controller (PLC) receives setting value and outputs control signals to electromagnetic proportional valve 10 or 11, the output signal producing ratio with the electromagnet controlling corresponding described electromagnetic proportional valve 10 or 11 drives and the piston rod action from described hydraulic actuating cylinder corresponding to belt tensioning drum, regulate the position from belt tensioning drum, the displacement difference of belt tensioning drum is set between-30mm-30mm;
(3) belt conveyor of the arm-type stacker-reclaimer of non-integral pitching brings into operation, and the pulling force sensor 6 being arranged on belt 8 side continues to detect belt along pulling force suffered by sense of motion and is converted to level signal and exports described programmable logic controller (PLC) 9 to; Described programmable logic controller (PLC) receives pull force calculation signal and generates feedback signal and exports electromagnetic proportional valve (10 and 11) to, produce with the electromagnet controlling corresponding described electromagnetic proportional valve (10 and 11) the piston rod action that the output signal of ratio drives described hydraulic actuating cylinder, keep belt 8 consistent with the pulling force setting value of step (1) along pulling force suffered by sense of motion;
(4) displacement pickup 7 be arranged on belt tensioning drum (2-1 and 2-2) detects the displacement of each described belt tensioning drum respectively and is converted to level signal and exports described programmable logic controller (PLC) 9 to; Described programmable logic controller (PLC) 9 receives the displacement that detects and generates feedback signal and exports electromagnetic proportional valve to, the piston rod action of output signal drive from hydraulic actuating cylinder of ratio is produced with the electromagnet controlling corresponding described electromagnetic proportional valve, under the prerequisite ensureing benchmark belt tensioning drum invariant position, regulate from the position of belt tensioning drum (2-1 or 2-2), keep described benchmark belt tensioning drum and consistent with the displacement difference setting value of step (2) from the displacement difference between belt tensioning drum.
The non-integral pitching arm-type stacker-reclaimer belt tension method that the present embodiment provides, realize constant tensile control and anti-deviation control by hydraulic control cylinder piston rod is flexible simultaneously, avoid and use tensioning weight to carry out tensioning, without the need to manually being adjusted by jack, time saving and energy saving, labour intensity is little and efficiency is high.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching, it is characterized in that, comprise belt, bend pulley, a pair belt tensioning drum, the pair of hydraulic cylinders be equipped with described belt tensioning drum and electromagnetic proportional valve and programmable logic controller (PLC), wherein, described bend pulley and belt tensioning drum are symmetricly set on described belt two ends respectively, and described bend pulley is fixedly installed on the jib of stacker-reclaimer; Described strap lug is around described bend pulley and belt tensioning drum, and described belt tensioning drum is arranged on the front jib afterbody of stacker-reclaimer and moves along with the pitching of jib, and its moving direction is mutually vertical with the direction of jib pitching; Piston rod and the described belt tensioning drum of described hydraulic actuating cylinder are hinged, and described electromagnetic proportional valve connects the hydraulic fluid port of described hydraulic actuating cylinder by oil circuit; Described programmable logic controller (PLC) outputs control signals to described electromagnetic proportional valve, produce proportional output to drive described piston rod action to control its proportion electro-magnet, the line of centers remaining on belt described in moving process overlaps with the line of centers of described bend pulley.
2. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 1, it is characterized in that, described clamping system also comprises detecting unit, described detecting unit comprises displacement pickup, and institute's displacement sensors detects the displacement of each described belt tensioning drum respectively and is converted to level signal to export described programmable logic controller (PLC) to poor with the real-time displacement obtaining described a pair belt tensioning drum.
3. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 2, it is characterized in that, described detecting unit also comprises pulling force sensor, and described pulling force sensor continues to detect described belt along pulling force suffered by service direction and is converted to level signal and exports programmable logic controller (PLC) to.
4. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 3, it is characterized in that, described detecting unit also comprises oil pressure sensor, level sensor and temperature sensor; Described oil pressure sensor, level sensor and temperature sensor continue oil pressure, liquid level and the temperature in detection oil sources and oil circuit and are converted to level signal to export programmable logic controller (PLC) to.
5. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 4, it is characterized in that, described programmable logic controller (PLC) is also connected with a man-machine interaction unit; Described man-machine interaction unit receives operation signal and the belt pull of setting and belt tensioning drum position deviation is transferred to described programmable logic controller (PLC); The belt tensioning drum position deviation of setting and described real-time displacement difference compare by described programmable logic controller (PLC), the belt pull of setting and pulling force suffered by described belt are compared generate feedback signal and control the piston rod action that corresponding electromagnetic proportional valve drives described hydraulic actuating cylinder.
6. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 5, it is characterized in that, be preset with absolute rating group in described programmable logic controller (PLC), described absolute rating group comprises maxim and/or the minimum value that pulling force, described belt tensioning drum offset deviation and described piston rod suffered by liquid level and temperature in oil sources and oil circuit, described belt reclaim distance.
7. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 6, is characterized in that, also comprise an alarm unit, and described alarm unit connects described programmable logic controller (PLC) and receives the output signal of described programmable logic controller (PLC); Maxim in the detected value of described detecting unit and described absolute rating group and/or minimum value compare by described programmable logic controller (PLC), once described detected value exceeds described maxim and/or minimum value, namely described programmable logic controller (PLC) controls described alarm unit and reports to the police.
8. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 7, is characterized in that, described belt both sides are also provided with deviation switch, and described deviation switch has two-stage angle; Once belt contacts deviation switch, described deviation switch generates electric signal and exports described programmable logic controller (PLC) to, described programmable logic controller (PLC) generates feedback signal and controls the piston rod action that corresponding electromagnetic proportional valve drives described hydraulic actuating cylinder, keeps the line of centers of belt and the axes normal of described belt tensioning drum; Once described deviation switch deflects to one-level angle, namely generate alerting signal and report to the police; Once described deviation switch deflects to secondary angle, namely generate shutdown signal and export shutdown signal to programmable logic controller (PLC), controlling belt conveyor and shut down.
9. the arm-type stacker-reclaimer belt tensioning system of non-integral pitching according to claim 8, is characterized in that, the belt pull of described setting is one-sided 0 to 30 ton, and the displacement difference between described belt tensioning drum is-30mm to+30mm.
10. a non-integral pitching arm-type stacker-reclaimer belt tension method, comprises the following steps:
(1) before the belt conveyor of the arm-type stacker-reclaimer of non-integral pitching runs, to be applied to the pulling force on belt along belt direction of travel by a pair belt tensioning drum by man-machine interaction unit setting hydraulic actuating cylinder, the programmable logic controller (PLC) be connected with described man-machine interaction unit receives setting value; Described programmable logic controller (PLC) outputs control signals to electromagnetic proportional valve, produce with the electromagnet controlling corresponding described electromagnetic proportional valve the piston rod action that proportional output signal drives the described hydraulic actuating cylinder of every side respectively, the pulling force be applied on belt of belt tensioning drum described in each is set between 0-30 ton;
(2) the described belt tensioning drum of side is set to benchmark belt tensioning drum, the described belt tensioning drum of opposite side is set to from belt tensioning drum, by described man-machine interaction unit setting benchmark belt tensioning drum with from the displacement difference between belt tensioning drum, described programmable logic controller (PLC) receives setting value and outputs control signals to electromagnetic proportional valve, the piston rod action of described hydraulic actuating cylinder is driven with the output signal of the electromagnet generation ratio controlling corresponding described electromagnetic proportional valve, keep the invariant position of benchmark belt tensioning drum, regulate the displacement from belt tensioning drum, the line of centers of belt is overlapped with the line of centers of bend pulley, described benchmark belt tensioning drum and be set between-30mm-30mm from the displacement difference between belt tensioning drum,
(3) belt conveyor of the arm-type stacker-reclaimer of non-integral pitching brings into operation, and the pulling force sensor being arranged on belt side continues to detect belt along pulling force suffered by sense of motion and is converted to level signal and exports described programmable logic controller (PLC) to; Described programmable logic controller (PLC) receives pull force calculation signal and generates feedback signal and exports electromagnetic proportional valve to, produce with the electromagnet controlling corresponding described electromagnetic proportional valve the piston rod action that the output signal of ratio drives described hydraulic actuating cylinder, keep belt consistent with the pulling force setting value of step (1) along pulling force suffered by sense of motion;
(4) be arranged on described benchmark belt tensioning drum and detect the displacement of each described belt tensioning drum respectively from the displacement pickup belt tensioning drum and be converted to level signal and export described programmable logic controller (PLC) to; Described programmable logic controller (PLC) receives the displacement that detects and generates feedback signal and exports electromagnetic proportional valve to, the piston rod action of described hydraulic actuating cylinder is driven with the output signal of the electromagnet generation ratio controlling corresponding described electromagnetic proportional valve, keep the invariant position of benchmark belt tensioning drum, regulate the displacement from belt tensioning drum; Thus keeping described benchmark belt tensioning drum and consistent with the displacement difference setting value of step (2) from the displacement difference between belt tensioning drum, the line of centers of belt overlaps with the line of centers of bend pulley.
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