CN1052521A - Grader with double-inclination spiral arc impeller - Google Patents

Abstract

The technical program provides a kind of line in the shape of a spiral with angle to arrange the arc impeller formula cement concrete spreader flattener of installing.This flattener working resistance and impact shock are little, and cloth is even, can improve the compactness and the uniformity of the empty shop of cement concrete layer, and be simple in structure, easy to maintenance, is easy to install and use on various cement concrete pavement pavers.

Description

Grader with double-inclination spiral arc impeller

The technical program relates to the apparatus for leveling on a kind of cement concrete pavement spreading machine, belongs to the road building machinery field of engineering technology.

When using the cement concrete pavement spreading machine to pave pavement of road, after being discharged on the road foundation, need at first the preliminary paving and leveling of cement concrete operation such as vibrate to the coagulating cement mound after stirring so that tamp subsequently.Finish cement concrete leveling operation, be mounted in the flattener on the cement concrete pavement paver.The form of structure of the flattener on the domestic and international existing cement concrete pavement spreading machine mainly contains fixedly scraping board type, swing scraping board type, rotor segment formula etc.Fixedly scraping board type is used for sliding form spreading machine more, has advantages such as simple in structure, easy to maintenance, but working resistance is big, is only applicable to the bigger paver of power; The swing scraping board type is compared with fixing scraping board type, and scraper plate be except pushing the cement concrete along with paver moves forward, laterally reciprocally swinging.The flattener of this form of structure is applicable to that water/binder ratio is at the plastic cement concrete more than 0.5, when being used for dry rigid cement concrete, not only flatten weak effect, and easily unnecessary cement concrete mixture is pushed away and be dispersed in outside two side templates, bring many difficulties to cleaning work; The rotor segment formula is usually used in being provided with the easy paver in simple stand of material-feeding mechanism, for reducing to push resistance, scraper plate is broken the whole up into parts, and is divided into some blades, and zigzag weld is connected on the axle.Blow slowly forward when mobile in frame, each vanelets pushes unnecessary cement concrete forward with the axle counter-rotating.This rotor segment formula is applicable to the plastic cement concrete, and is relatively simple for structure.But weak point is that cement concrete mixture distributes even inadequately on the cross section of road when cloth and leveling.Can not push to two side templates being deposited in the middle cement concrete mixture of roadbed.The flattener of above-mentioned form all can only produce the effect that pushes to cement concrete simultaneously.

The purpose of the technical program, being to provide a kind of energy will be deposited in the middle cement concrete mixture of roadbed pushes to two side templates, its scraper plate can not only work the effect of pushing, and can be to the flattener of cement concrete generation extruding and kneading action, with the uniformity of further raising cement concrete cloth and the quality of leveling.

The flattener that the technical program provided is made up of central siphon, sprocket shaft, sprocket wheel and curved blade etc.In order to reduce the impact shock that the discontinuous work of flattener blade brings, with two groups of linear in the shape of a spiral being installed on the central siphon of blade.Promptly on each cross section of central siphon, all symmetry is installed with a pair of blade relatively.In the process that central siphon rotates a circle, the blade that is installed on the central siphon participates in operation in succession, and general always when previous row of blades when leaving away, second blade just in time enters job position, makes to impact to be alleviated, the while has also reduced working resistance; In order to be deposited in the middle unnecessary cement concrete mixture of roadbed, push to position near two side templates, to improve the uniformity of cloth, the technical program with the blade on the central siphon with the central siphon point midway be starting point respectively to both sides tilted 15～30 the degree, make blade when pushing unnecessary cement concrete mixture forward, push to two side templates being deposited in the middle cement concrete mixture of roadbed; Simultaneously, the technical program makes circular shape with each blade along its longitudinal cross-section, changed the force direction of blade to cement concrete, make it in operation process, unnecessary cement concrete mixture can not only be pushed forward, and can also apply the extruding and kneading effect, thereby the compactness and the uniformity of empty shop layer cement concrete have been improved to the cement concrete mixture layer of void shop.Curved blade is fixed by bolts on the blade scraper base, can change very easily after the curved blade wearing and tearing.In order to adapt to different paving widths, the central siphon of flattener generally all is made into several joints, central siphon can be extended or shorten, therefore, for make and use in convenience, middle a few nodal axisn pipe blades, its angle of inclination can be 0 degree, and has only the blade on the central siphon at close two ends that 15～30 inclination angles of spending are arranged.

The flattener that the technical program provides is the same with the flattener of other form of structure, is installed on the cement concrete pavement paver, by the motor driven on the paver.Apart from the vibrate height of soffit of paver, and the speed of gyration of blade etc. all can be according to using needs adjust apart from the axial line of the height of road bed, central siphon for the length of its central siphon, the axial line of central siphon.

The technical program has following advantage:

1, the blade on the flattener central siphon in the shape of a spiral line arrange, participate in operation in succession, reduced working resistance, alleviated the impact shock of central siphon.

2, the blade on the flattener central siphon tilts to both sides respectively, when the blade operation, can push to two side templates being deposited in the middle unnecessary cement concrete mixture of roadbed, has improved the uniformity of cloth.

3, flattener central siphon blade is circular arc along its longitudinal cross-section, not only the superfluous water cement concrete has been played the effect that pushes forward, and has produced extruding and kneading action, has improved the compactness and the uniformity of the empty shop of cement concrete layer.

Fig. 1～4th, an embodiment of the technical program.Fig. 1 is the grader with double-inclination spiral arc impeller schematic diagram for the supporting design of GHTJ4500 type paver.Wherein: 1 end cap, 2 supports, 3 curved blades, 4 blade support arms, 5 central siphons, 6 central siphon flange, 7 bearings, 8 sprocket wheels, 9 sprocket shafts.

Fig. 2 is a grader with double-inclination spiral arc impeller A-A place schematic side view.Among the figure: 10 bolts, 11 curved blade bases, 12 sprocket shaft connecting keys.

GHTJ4500 type paver is the cement concrete pavement paver by the common development of Traffic Sicence Inst., Shanxi Prov. and Shanxi Province Highway Administration Bureau.Flattener central siphon 5 and sprocket shaft 9 are installed on the paver by support 2, and symmetry is installed with the linear in the shape of a spiral installation of 3, two groups of curved blades 3 of two groups of curved blades on central siphon 5.Promptly on each cross section of central siphon 5 all symmetry a pair of curved blade is installed.Between adjacent two pairs of curved blades, in cross section, successively differ 45 degree, be sequentially arranged in 1 meter the length, 8 pairs of curved blades are installed, form a complete different journey.The process that rotates a circle at central siphon 5 like this, these 8 pairs of curved blades participate in operation in succession, and always when previous when being about to leave away, second curved blade just in time enters job position, thereby alleviated the impact shock of central siphon 5.On central siphon 5 in 1 meter the length range, the curved blade that enters job position simultaneously is no more than 2, therefore, has reduced operation resistance, helps the reasonable distribution and the performance of complete machine power on the other hand.Curved blade 3 is fixed by bolts on the curved blade base 11.The active length that can remove and install central siphon 5 after its wearing and tearing very easily can be according to the pavement spread width adjustment.Its method is that flange 6 is arranged on central siphon 5, by flange more than 6 nodal axisn pipes is linked together.Central siphon 5 slides over sprocket shaft 9, connects by sprocket shaft connecting key 12.Motor on the paver rotates when moving forward slowly with paver by sprocket wheel 8 drive chain wheel shafts 9 and central siphon 5, thereby makes the curved blade 3 on the central siphon 5 flatten operation.Push to two side templates in order to be deposited in the middle superfluous water cement concrete of roadbed, 0.5 meter at central siphon 5 two ends are with interior curved blade, respectively to both sides tilted 20 the degree, make the curved blade in this two segment distance when operation, unnecessary cement concrete mixture be pushed to two side templates, to fill up the vacancy and the hole of there.For make and use in convenience, the degree of tilt of the blade of present embodiment central siphon 5 mid portions be 0 the degree.

Fig. 3 and Fig. 4 are curved blade and straight blade fundamental diagram.Among Fig. 4: 13 straight blades, 14 cement concrete mixtures.As we know from the figure, the active force of straight blade 13 is parallel with the tangential direction of its movement locus, and the force direction of arc impeller scraper plate 3 changes with its circular arc circle, its active force not only pushes unnecessary cement concrete mixture forward, and have a component vertically to point to cement concrete mixture, it is produced extruding and kneading action.Under curved blade 3 this repetitious extruding and kneading effects, the interior tissue of the cement concrete layer of empty shop is tending towards all even closely knit more.

Claims (1)

1, the wheeled cement concrete pavement paver of a kind of rotating vane flattener comprises central siphon, blade, blade support arm.It is characterized in that blade line layout installation in the shape of a spiral on central siphon, blade on the central siphon is a starting point with the point midway of central siphon, to both sides inclination 15～30 degree, each blade is circular shape along its longitudinal cross-section, is fixed by bolts on the blade base on the central siphon respectively.

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