CN102942066B - Intelligent material stacking trolley - Google Patents
Intelligent material stacking trolley Download PDFInfo
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- CN102942066B CN102942066B CN201210467349.7A CN201210467349A CN102942066B CN 102942066 B CN102942066 B CN 102942066B CN 201210467349 A CN201210467349 A CN 201210467349A CN 102942066 B CN102942066 B CN 102942066B
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Abstract
The invention discloses an intelligent material stacking trolley, which comprises a trolley body and a driving device, wherein the trolley body is arranged on a walking rail, the driving device is used for driving the trolley body to move on the walking rail, a funnel is arranged on the trolley body, a telescopic slipping pipe and a hoisting mechanism are arranged on a material outlet of the funnel, the hoisting mechanism is used for driving the telescopic slipping pipe to be elongated or shortened, a material collecting and dust suppression hopper is arranged on a material outlet of the telescopic slipping pipe, the inner diameter of the material collecting and dust suppression hopper is gradually decreased in the vertical downward direction, a material accumulation platform used for accumulation and material buffering is arranged on the material outlet of the telescopic slipping pipe, a material level detecting device is arranged on the material outlet of the material collecting and dust suppression hopper, the intelligent material stacking trolley also comprises a control system, and the control system comprises an industrial control computer which is connected with the material level detecting device and is used for controlling the action of the driving device and the hoisting mechanism. The intelligent material stacking trolley disclosed by the invention has the advantages that the requirements of a sealed material blending field on stacking material blending equipment can be met, and in addition, the flying dust in the operation process can be effectively reduced.
Description
Technical field
The invention belongs to loose unpacked material process and conveying technology field, concrete is that a kind of intelligence for discharging or windrow piles trolley.
Background technology
Movable unloading trolley is widely applied in industries such as metallurgy, coal, cement and chemical industry, is mainly used in bulk material and carries out discharging or windrow at storage bin top or top, closed stock ground.Existing movable unloading trolley is mainly divided into two kinds of versions that are one-sided or both sides band discharge chute, to be discharged in storage bin or stockyard by material by chute and to store up, this dump car possesses the ability that fixed point continuous discharge or short range straight line reciprocate continuous windrow.
The development of the closed blending-field technology of arranging along with space, adopt movable unloading trolley to replace traditional large-scale mixing stacker device and become development tendency, but existing dump car do not have round continuous advancing windrow that closed blending-field requires mixing stacker device, etc. drop centering windrow, become the functions such as starting point time delay fixed endpoint windrow, the blending process requirement of layering tiling cannot be realized.
In addition, often produce aniseed dust during dump car discharging, the following four kinds of modes of main employing carry out dedusting at present: 1, on each feed bin, establish dedust air duct, make negative pressure in storehouse, the airborne dust of generation enters dust exhaustor by dedust air duct; 2, on dump car, arrange an exhausting arm, one end of arm is moved with dump car, and the other end access movable ventilation groove of arm carries out dedusting; 3, dump car carries ventilation and dust removal device, is discharged in storehouse after being caught by dust again; 4, elephant trunk exit arranges watering or atomising installation.
First three plants dedusting method not only complex structure, and energy consumption is large, and only can be applied to discharging in storehouse, and in the 4th, dedusting method not only can waste water source, and is not suitable for the material running into water and change with regard to there is character.
Publication number is that the Chinese patent of CN202186763U discloses a kind of dump car system with telescopic spouting, the dump car system of this band telescopic spouting adopts and reduces the mode of telescopic spouting to stockpile surface distance, reduce airborne dust during dump car discharging, although achieve the effect reducing airborne dust to a certain extent, but because material has larger drop from chute to elephant trunk discharge outlet, speed during material discharging is larger, still can cause the generation of a large amount of dust with the collision of windrow, its dust removing effects is unsatisfactory.
In view of this, the present invention is intended to explore a kind of intelligence heap trolley, and this intelligence heap trolley can not only meet the requirement of closed blending-field to mixing stacker device, and can effectively reduce the airborne dust in operation process.
Summary of the invention
The technical problem to be solved in the present invention proposes a kind of intelligence heap trolley, and this intelligence heap trolley can not only meet the requirement of closed blending-field to mixing stacker device, and can effectively reduce the airborne dust in operation process.
Realize above-mentioned technical purpose, intelligence heap trolley of the present invention, comprise and be arranged on trolley body on walking track and for driving trolley body actuating device of movement on walking track, described trolley body is provided with funnel, and the discharging opening of described funnel is provided with telescopic spouting and the hoisting mechanism for driving telescopic spouting to elongate or shorten;
The discharging opening of described telescopic spouting is provided with the dust suppression bucket that gathers materials, the internal diameter of the described dust suppression bucket that gathers materials successively decreases gradually on the direction of its feeding mouth sensing discharging opening, and the internal perisporium of the dust suppression bucket that gathers materials is provided with for piling up and cushioning the buildup platform of material, described in the gather materials discharging opening of dust suppression bucket be provided with material-level detecting device;
Also comprise control system, described control system comprises and to be connected with material-level detecting device and for the industrial computer of accessory drive and hoisting mechanism action.
Further, described telescopic spouting comprises the nestable elephant trunk joint be fitted together of at least two ganglionic layers, is provided with and saves the clamping body departed from and the lifting body being positioned at the elephant trunk joint motion of internal layer for being positioned at outer field elephant trunk joint jack-up when telescopic spouting shrinks for preventing being positioned at outer field elephant trunk joint when telescopic spouting extends from the elephant trunk being positioned at internal layer between adjacent two joint elephant trunk joints.
Further, at described telescopic spouting inlet point on the direction of discharging opening, the diameter of described elephant trunk joint increases gradually.
Further, described clamping body comprises being arranged on the internal layer elephant trunk joint inner baffle ring that extends radially outwardly of bottom and being arranged on outer elephant trunk joint top and extends radially inwardly and the outer baffle ring coordinated with inner baffle ring.
Further, described lifting body comprises the jacking baffle ring being arranged on outer elephant trunk joint bottom and extending radially inwardly, and the internal diameter of described jacking baffle ring is less than the external diameter of described outer baffle ring.
Further, described hoisting mechanism comprises the winch and the assembly pulley that alters course that are arranged in described trolley body, and described winch is saved by the outermost layer elephant trunk of the steel rope with described telescopic spouting that are wrapped in described changed course assembly pulley and is connected.
Further, the dust suppression bucket that gathers materials described in is arranged on outermost elephant trunk joint.
Further, described buildup platform comprise be arranged on described in gather materials the buildup platform of dust suppression bucket internal perisporium, the upper surface of described buildup platform is provided with the wear-resisting blend stop for stacking material.
Further, described trolley body is provided with hands-operation room, and it is indoor that described industrial computer is arranged on described hands-operation, and described hands-operation indoor are also provided with the telltale and terminal box that are connected with described industrial computer.
Further, the speed of travel of described trolley body on described walking track meets:
Wherein, v is the material transfer rate of the travelling apron for transporting material to trolley body;
V1 be trolley body identical with the material feeding direction of travelling apron time the speed of travel;
V2 be trolley body contrary with the material feeding direction of travelling apron time the speed of travel.
Beneficial effect of the present invention is:
Intelligence heap trolley of the present invention by arranging the dust suppression bucket that gathers materials on the discharging opening of telescopic spouting, and buildup platform is set gathering materials in dust suppression bucket, during first discharging, material parts is deposited on buildup platform, when continuing discharging, the material parts unloaded from telescopic spouting impacts on the material being deposited in buildup platform, form the mode of operation of material dnockout, can not only play and slow down stream speed, alleviate the reentrainment of dust that material high-speed impact stockpile causes, and the wearing and tearing of material to the inwall of the dust suppression bucket that gathers materials can be reduced;
By the internal diameter of the dust suppression bucket that gathers materials is set to successively decrease gradually on direction straight down, namely the inlet point internal diameter of dust suppression bucket of gathering materials is greater than its discharging opening internal diameter, ensureing under enough conditions of slipping material angle not putty, stream is concentrated, centering blanking, material segregation in windrow process can be reduced, and reduce the scope contacted with air in material decline process, suppress telescopic spouting internal dust excessive; During discharging, by controlling the diff-H between telescopic spouting and stockpile, and combining the buffer action of the dust suppression bucket that gathers materials, better can suppress airborne dust;
By arranging control system, can be convenient to automatically control heap trolley, industrial computer receives the detection signal from material-level detecting device, and actuating device and hoisting mechanism are controlled, can realize piling the round continuous advancing windrow of trolley, etc. drop centering windrow, become the functions such as starting point time delay fixed endpoint windrow, traveling location and front and continued trouble point windrow, meet the windrow function of blending-field layering tiling.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's intelligence heap trolley embodiment;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the A detail drawing of Fig. 1;
Fig. 4 is the structural representation of the intelligence heap trolley after telescopic spouting shrinks;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the structural representation of telescopic spouting.
Description of reference numerals:
1-trolley body; 2-walks track; 3-funnel; 4-telescopic spouting; 4a-elephant trunk saves; 4b-inner baffle ring; 4c-outer baffle ring; 4d-jacking baffle ring; 4e-roller; 5-gathers materials dust suppression bucket; 6-buildup platform; 6a-buildup platform; The wear-resisting blend stop of 6b-; 7-material-level detecting device; 8-stockpile; 9-winch; 10-alters course assembly pulley; 11-steel rope; 12-hands-operation room; 13-travelling apron.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, be the structural representation of the present invention's intelligence heap trolley embodiment; Fig. 2 is the left view of Fig. 1.The intelligence heap trolley of the present embodiment, comprise and be arranged on trolley body 1 on walking track 2 and for driving trolley body 1 actuating device of movement on walking track 2, trolley body 1 is provided with funnel 3, and the discharging opening of funnel 3 is provided with telescopic spouting 4 and the hoisting mechanism for driving telescopic spouting 4 to elongate or shorten.
The discharging opening of telescopic spouting 4 is provided with the dust suppression bucket 5 that gathers materials, gather materials dust suppression bucket 5 internal diameter its feeding mouth point to discharging opening direction on successively decrease gradually, and the internal perisporium of the dust suppression bucket 5 that gathers materials is provided with for piling up and cushioning the buildup platform 6 of material, the discharging opening of the dust suppression bucket 5 that gathers materials is provided with material-level detecting device 7.Preferably, the buildup platform 6 of the present embodiment comprises the buildup platform 6a being arranged on dust suppression bucket 5 internal perisporium that gathers materials, the upper surface of buildup platform 6a is provided with the wear-resisting blend stop 6b for stacking material, by arranging buildup platform 6a and wear-resisting blend stop 6b, part stacking material in material discharge process can be guaranteed, the buildup platform 6a of the present embodiment adopts steel plate to be made, and wear-resisting blend stop 6b adopts rail to make.
The intelligence heap trolley of the present embodiment also comprises control system, and control system comprises and to be connected with material-level detecting device 7 and for the industrial computer of accessory drive and hoisting mechanism action.
The trolley body 1 of the present embodiment comprises vehicle frame, driving wheel, flower wheel, pinch roller, idler machining and bend pulley group, under control of the control system by the combined action of actuating device, driving wheel and flower wheel, realize intelligence heap trolley and be expert on track 2 and come and go continuous advancing.
The intelligence heap trolley of the present embodiment by arranging the dust suppression bucket 5 that gathers materials on the discharging opening of telescopic spouting 4, and buildup platform 6 is set gathering materials in dust suppression bucket 5, during first discharging, material parts is deposited on buildup platform 6, when continuing discharging, the material parts unloaded from telescopic spouting 4 impacts on the material being deposited in buildup platform 6, form the mode of operation of material dnockout, can not only play and slow down stream speed, alleviate the reentrainment of dust that material high-speed impact stockpile causes, and the wearing and tearing of material to the inwall of the dust suppression bucket 5 that gathers materials can be reduced.
By the internal diameter of the dust suppression bucket 5 that gathers materials is set to successively decrease gradually on direction straight down, namely the inlet point internal diameter of dust suppression bucket 5 of gathering materials is greater than its discharging opening internal diameter, ensureing under enough conditions of slipping material angle not putty, stream is concentrated, centering blanking, material segregation in windrow process can be reduced, and reduce the scope contacted with air in material decline process, suppress telescopic spouting 4 internal dust excessive; During discharging, by controlling the diff-H between telescopic spouting 4 and stockpile 8, and combining the buffer action of the dust suppression bucket 5 that gathers materials, better can suppress airborne dust.
By arranging control system, can be convenient to automatically control heap trolley, industrial computer receives the detection signal from material-level detecting device 7, and actuating device and hoisting mechanism are controlled, can realize piling the round continuous advancing windrow of trolley, etc. drop centering windrow, become the functions such as starting point time delay fixed endpoint windrow, traveling location and front and continued trouble point windrow, meet the windrow function of blending-field layering tiling.
Further, telescopic spouting 4 comprises the nestable elephant trunk joint 4a be fitted together of at least two ganglionic layers, is provided with and saves the clamping body that 4a departs from and the lifting body being positioned at the elephant trunk joint 4a motion of internal layer for being positioned at outer field elephant trunk joint 4a jack-up when telescopic spouting 4 shrinks for preventing being positioned at outer field elephant trunk joint 4a when telescopic spouting 4 extends from the elephant trunk being positioned at internal layer between adjacent two joint elephant trunk joint 4a.Preferably, at telescopic spouting 4 inlet point on the direction of discharging opening, the diameter of elephant trunk joint 4a increases gradually, namely the intake port of telescopic spouting 4 is less than discharging opening diameter, telescopic spouting 4 extension and contraction control can not only be convenient to, and material can be alleviated in discharge process to the impact wear of telescopic spouting inwall.Preferably, the dust suppression bucket 6 that gathers materials is arranged on outermost elephant trunk joint 4a, and namely no matter telescopic spouting 4 extends or shortens, and the dust suppression bucket 6 that gathers materials is positioned on the discharging opening of telescopic spouting 4 all the time.
As shown in Figure 6, the clamping body of the present embodiment comprises being arranged on bottom internal layer elephant trunk joint 4a the inner baffle ring 4b that extends radially outwardly and being arranged on outer elephant trunk joint 4a top and extends radially inwardly and the outer baffle ring 4c coordinated with inner baffle ring 4b, in the process that telescopic spouting 4 extends, by the position-limiting action of inner baffle ring 4b and outer baffle ring 4c, can prevent between adjacent two joint elephant trunk joint 4a, outer elephant trunk joint departs from from internal layer elephant trunk joint.The lifting body of the present embodiment comprises the jacking baffle ring 4d being arranged on and extending radially inwardly bottom outer elephant trunk joint 4a, the internal diameter of jacking baffle ring 4d is less than the external diameter of outer baffle ring 4c, by arranging the jacking baffle ring 4d of this structure, in telescopic spouting 4 contraction process, jacking baffle ring 4d can hold the internal layer elephant trunk joint 4a upward movement be adjacent.The inner baffle ring 4b of the present embodiment and outer baffle ring 4c being also provided with roller 4e, reducing resistance for reducing to elongate or shorten in process at telescopic spouting 4.
Further, the hoisting mechanism of the present embodiment comprises and is arranged on winch in trolley body 19 and changed course assembly pulley 10, and winch 9 saves 4a with the outermost layer elephant trunk of telescopic spouting 4 be connected by being wrapped in the changed course steel rope 11 of assembly pulley 10.Elongated or shortened by the positive and negative curling telescopic spouting 4 that realizes of winch 9, in order to ensure that in elevator structure operation process, telescopic spouting 4 steadily stretches, respectively be provided with 1 steel rope 11 in telescopic spouting 4 both sides, steel rope 11 adopts 4 fixed forms to save 4a with the outermost elephant trunk of telescopic spouting 4 to be connected.
Further, trolley body 1 is provided with hands-operation room 12, industrial computer is arranged in hands-operation room 12, and in hands-operation room 12, be also provided with the telltale and terminal box that are connected with industrial computer, by arranging hands-operation room 12, convenient operation personnel carry out execute-in-place and control to discharge process in hands-operation room 12, also can remote terminal be directly adopted to be connected with industrial computer, discharge process is controlled automatically, can realize Non-follow control and the combination automatically controlled, the selection of mode is more flexible.
Below the working process of the present invention's intelligence heap trolley is described.
When blending-field needs windrow for the first time, control system sends instruction, and trolley body 1 starts and is positioned to blending-field start position, and winch 9 starts to be decontroled to maximum extended state by telescopic spouting 4, trolley body 1 wait material input in place;
When after mass transport to funnel 3, material changed course flowed down by funnel 3, after arriving along telescopic spouting 4 the dust suppression bucket 5 that gathers materials, stream assembles the rear heap that slows down in stock ground; Trolley body 1 at the uniform velocity moves ahead on walking track 2 simultaneously, ensures that material stockpile forms the triangular section of evenly rule;
When trolley body 1 runs to blending-field final position, heap trolley stops walking continuing to keep windrow, winch 9 starts simultaneously, material-level detecting device 7 detects the height of stockpile 8, after stockpile 8 reach a certain height, telescopic spouting 4 is upwards retracted certain altitude by winch 9, and then trolley body 1 adjusts reverse traveling speed at the uniform velocity traveling windrow, comes and goes traveling layer-by-layer distribution by that analogy;
Equal in order to ensure to pile doses in round windrow process in unit stockpile 8 length, trolley body comes and goes traveling speed and should meet on walking track 2:
Wherein, v is the material transfer rate of the travelling apron 13 for transporting material to trolley body;
V1 be trolley body identical with the material feeding direction of travelling apron 13 time the speed of travel;
V2 be trolley body contrary with the material feeding direction of travelling apron 13 time the speed of travel.
In order to the Blending Efficiency of Blending obtained, except suitably increasing the number of plies of mixing stockpile 8, " becoming starting point time delay fixed endpoint " method can be adopted in cloth process to reduce blending ore end doses, namely trolley body 1 at start position along with material stack height raises, tile every layer of material time windrow starting point progressively move forward; And trolley body 1 in final position along with stockpile 8 highly raises, tile every layer of material time windrow terminal remain unchanged, and postpone windrow material stack height be promoted to next bed depth.
According to the blending process windrow principle tiled with higher slice, complete the operation of blending-field windrow.
When intelligence heap trolley breaks down, control system sends instruction, upstream batching and conveying facility stop feed, and control system stores current windrow position and material stack height simultaneously, original place can be adopted to detect and repair or move to the reparation to be checked of maintenance position, two ends, stock ground; After intelligent windrow carriage fault is got rid of, according to the relevant information that control system stores, automatic traveling navigates to trouble point last time, and telescopic spouting 4 is put into suitable feed height, after dead work completes, waits for that material input has continued windrow operation.
To sum up, compared with prior art, its advantage is as follows for the present invention's intelligence heap trolley:
(1) hands-operation room 12 is set and can realizes M/C or remote auto operation on intelligence heap trolley field adjustable or machine, realize coming and going continuous advancing windrow, etc. drop centering windrow, become the functions such as starting point time delay fixed endpoint windrow, traveling location and front and continued trouble point windrow, meet blending-field layering tiling function;
(2) intelligence heap trolley of the present invention can be applied to the closed blending-field technique of arranging in space, replaceable traditional mixing stacker device, reduce closed factory building span, reduce floor area, simultaneously due to intelligence heap trolley own structural characteristics, eliminate the luffing mechanism in traditional mixing stacker device and centering body, significantly alleviate weight of equipment, simplified apparatus layout, is easy to operation and maintenance;
(3) arranging telescopic spouting 4 can avoid existing heap trolley high to stockpile surface drop because of bell mouth, and in the airborne dust problem that discharge process produces, simultaneously can ensure drop operations such as remaining in windrow process.This kind of dust suppression mode is nature air-tight manner, without the need to providing other energy extraneous, non-secondary pollution, energy-conserving and environment-protective;
(4) arrange the dust suppression bucket 5 that gathers materials can reduce by the platform of buildup platform 6 stream that material formed because of free-falling body and accelerate, alleviate the reentrainment of dust that stream high speed impact stockpile causes, minimizing material is to the Innerside wear of the dust suppression bucket 6 that gathers materials simultaneously; By reducing dust suppression bucket 6 discharging opening size of gathering materials, realizing stream and concentrating even centering windrow, reduce material segregation in windrow process, reduce the scope contacted with air in material decline process simultaneously, suppress telescopic spouting 4 internal dust excessive;
(5) on integral structure, intelligence heap trolley of the present invention adopts one-sided windrow, windrow side is provided with telescopic spouting 4, opposite side is provided with hands-operation room 12, walking track 2 is located on the platform of travelling apron 13 support both sides, overall decentralization, the stability that the equipment that improves runs and reliability.
Intelligence heap trolley of the present invention is specially adapted to the windrow operation of the closed blending-field that space is arranged, also can be used for storage bin top or top, closed stock ground carries out discharging or windrow simultaneously, has very high economic benefit and social benefit.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. an intelligence heap trolley, comprise and be arranged on trolley body on walking track and for driving trolley body actuating device of movement on walking track, described trolley body is provided with funnel, the discharging opening of described funnel is provided with telescopic spouting and the hoisting mechanism for driving telescopic spouting to elongate or shorten, and it is characterized in that:
The discharging opening of described telescopic spouting is provided with the dust suppression bucket that gathers materials, the internal diameter of the described dust suppression bucket that gathers materials successively decreases gradually on the direction of its feeding mouth sensing discharging opening, and the internal perisporium of the dust suppression bucket that gathers materials is provided with for piling up and cushioning the buildup platform of material, described in the gather materials discharging opening of dust suppression bucket be provided with material-level detecting device;
Also comprise control system, described control system comprises and to be connected with material-level detecting device and for the industrial computer of accessory drive and hoisting mechanism action;
Described buildup platform comprise be arranged on described in gather materials the buildup platform of dust suppression bucket internal perisporium, the upper surface of described buildup platform is provided with the wear-resisting blend stop for stacking material.
2. intelligence heap trolley according to claim 1, it is characterized in that: described telescopic spouting comprises the nestable elephant trunk joint be fitted together of at least two ganglionic layers, be provided with between adjacent two joint elephant trunk joints and save the clamping body departed from and the lifting body being positioned at the elephant trunk joint motion of internal layer for being positioned at outer field elephant trunk joint jack-up when telescopic spouting shrinks for preventing being positioned at outer field elephant trunk joint when telescopic spouting extends from the elephant trunk being positioned at internal layer.
3. intelligence heap trolley according to claim 2, is characterized in that: at described telescopic spouting inlet point on the direction of discharging opening, and the diameter of described elephant trunk joint increases gradually.
4. intelligence heap trolley according to claim 3, is characterized in that: described clamping body comprises being arranged on the internal layer elephant trunk joint inner baffle ring that extends radially outwardly of bottom and being arranged on outer elephant trunk joint top and extends radially inwardly and the outer baffle ring coordinated with inner baffle ring.
5. intelligence heap trolley according to claim 4, is characterized in that: described lifting body comprises the jacking baffle ring being arranged on outer elephant trunk joint bottom and extending radially inwardly, and the internal diameter of described jacking baffle ring is less than the external diameter of described outer baffle ring.
6. intelligence heap trolley according to claim 5, it is characterized in that: described hoisting mechanism comprises the winch and the assembly pulley that alters course that are arranged in described trolley body, and described winch is saved by the outermost layer elephant trunk of the steel rope with described telescopic spouting that are wrapped in described changed course assembly pulley and is connected.
7. according to claim 3 intelligence heap trolley, it is characterized in that: described in gather materials dust suppression bucket be arranged on outermost elephant trunk joint on.
8. intelligence heap trolley according to claim 1, it is characterized in that: described trolley body is provided with hands-operation room, it is indoor that described industrial computer is arranged on described hands-operation, and described hands-operation indoor are also provided with the telltale and terminal box that are connected with described industrial computer.
9. intelligence heap trolley according to claim 1, is characterized in that: the speed of travel of described trolley body on described walking track meets:
Wherein, v is the material transfer rate of the travelling apron for transporting material to trolley body;
V1 be trolley body identical with the material feeding direction of travelling apron time the speed of travel;
V2 be trolley body contrary with the material feeding direction of travelling apron time the speed of travel.
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| CN201210467349.7A CN102942066B (en) | 2012-11-19 | 2012-11-19 | Intelligent material stacking trolley |
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| CN201210467349.7A CN102942066B (en) | 2012-11-19 | 2012-11-19 | Intelligent material stacking trolley |
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| CN102942066A (en) | 2013-02-27 |
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