DE1534234A1 - Pneumatic compensation device to keep constant the pressure exerted by the smoothing surface of the leveling group of a vibratory production machine for applying layers of material when building roads - Google Patents

Description

Ing.Bomenioo Domenighetti in Bellinzona / Switzerland.-

Oil-pneumatic balancing device to keep constant the pressure exerted by the smooth surface of the leveling group of a vibratory production machine for the application of layers of material when building roads _e

The present invention relates to a device of the oil-pneumatic type, the purpose of which is to apply the pressure exerted by the leveling group of a paving machine, which machines are also called vibratory machines, to the layer of bituminous material on which said leveling group rests control »The device according to the invention can be attached to road paving machines which are provided with leveling organs of the self-leveling type, namely said device is bolted to the front of the machine frame and comprises at least one arm, as well

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a pulling element, which due to the action of a fluid pressure working mechanism on the leveling group ropes a hub « exercise force

An exemplary embodiment of the device according to the invention is illustrated in the attached drawings, in which reference is made to a vibrating production machine of the self-moving bit pneumatic wheels for applying bituminous conglomerates ^ moving types with caterpillars, can be attached »In the attached drawings shows:
1 shows a side view in elevation,

FIG. 2 is an enlargement of the rear part of the machine _{β shown in FIG}

Fig. J is a plan view of the machine shown in Fig. 1; Fig. 4 shows the hydraulic system for the oil-pneumatic control of the compensating device forming the subject of the present invention.

The vibratory machine for bituminous conglomerates on which the device forming the subject of the present invention is assembled consists essentially of a main body or frame or, frame 10, which or »which the motor and all movement organs» ne carries and in the front part there is a room that is used for A bituminous conglomerate is taken up, the latter being unloaded from the power supply vehicles and applied to the street mu8S, said space is sideways through the cladding 7 and below one or more supply line systems 9 limited.

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jKftJOhlne tit mounted on pneumatic pulling wheels 3 and on heli-pneumatic cable wheels 2 »!» front part of the Äaaohine are the Stosa-I «Mfebraoht, against which sioh the strife of the not shown,

uad the lorry carrying the material to be fed off · • so that the latter can be pushed against the front side of the manufacturing base during the feeding phase of the material ia & gaaa *

From the motor vehicle into the material unloaded laterally by the casings 7 and at the bottom by the supply line 9

Ton b *** eter supply line with adjustable speed and in J j maöh Wunach adjustable slope to the rear of the machine , in which the latter is the distribution snow 4 and the covering apparatus 5 are located s «r * i 14UI0 · poor 12, dta sa. their front inds approximately ia the middle of the machine _β β _β Β # in ll _B νβνοο-Ι-τΛ Η-ΙτΑ. vmd "sleiic fine, in a broad slab surface 13 e: avJ ^ u _? - ^^ - ^ v .. '. -. ■.;" = ", ■" ./ ^j i ^ ine »rvr- ., - ^ /?.-* foldable livellisrvsrlängung 8 -vexröil ·. ,; <: uvug ^J 5 · ^; .ή ■ - .-:, ..; ϊ-ί ™ · ^ · .-?:. ait the oil surface 13 duroh ice 8ö3n. »rnier 14 verbuif.aen l & lf doe sen in relation to the vertical Torzuga white achräf. The

n geaiäee the above-old can of designated lis'iugsaahl 3 auah more than nux * a S9in _t in which case a connected slnd behind the other disposed iat imü parts by hinges laiteinander ^ the latter Tarrleh'tungen besltasii "DIE d.ie Blocking of said "extensions in their sndsi © hunger. Ca- ^ siten ^ In addition, the above-mentioned inclined hinges 14 ! Can be dismantled" whereby, if necessary, the shortening or reduction of the above-mentioned extensions can be made possible.

In the body 10 of the machine there is a horizontally running! Ȁngstunnei worked out, of the material that was subsequently included in the

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desired amount applied to the street sole and then from the Distribution augers or screws 4 is distributed in the transverse direction will.

Then the leveling smoothness group 5 comes in. Function, its importance is fundamental, because it has the task of regulating the wall thickness of the material layer that the machine leaves behind to keep constant · Since the entire body 10 of the machine during the Vorrüokbewegung on the unevenness of the road surface, on which the Machine is forced to move forward exposed to static vibrations be known, the leveling smoothing group 5 is designed such that the Effect of said vibrations on the finished road surface if possible is eliminated *

For this purpose the leveling-smoothing element 5 is bolted by two in 11 Longitudinal arms 12 connected to the main frame 10. In this way the Nirelliergruppe 5 dragged along by the Hauptauggruppe 10, and the length combined with the two-fold choice of the lag of the bolt 11 of the arms 12 'allows the leveling group 51 to generate unwanted reproductions the vibrations of the Heuptkb'rpera 10 of the Yibrierfertigungsmaschine based on the terrain waves of the already existing road bed on the solid road surface to be almost completely eliminated « In order to reach the wiped double, leveling group 5 have a special form, and that said group must have a broad one have extensive smooth surface IJ, in many cases from the inside helBtoar s0in must, and which in turn rigidly on the leveling group is mounted «

Fee is easy to understand that there is a guarantee of the butom tables The leveling effect of leveling group 5 is essential that their

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ι .Smooth surface 13, which during the work on the noon fresh, ι hardly applied and leveled by the machine material surface , whereby it would also strive to pull back laterally, however, said material would primarily suffer changes in its wall thickness, which are approximately proportional to the presumed changes in the bridge. In order to allow the calculation of the bruise exerted by the smooth surface 13 of the leveling group 5 on the bituminous material, only the g total weight of said leveling group 5 has to pass through the entire supporting surface. area 13 can be divided, which can be easily expressed using the formula below

where B corresponds to the bridge exercised, k is the constant,

G represents the total leveling weight, and

P "which is placed on the bituminous material on the surface indicates.

Depending on the various work that the masohine has to carry out, changes both the value of ß and that of F, whereby of course the value of the pressure B is also subject to change » Indeed, in the case of vibratory manufacturing, the value of G changes machines in which the extensions 8 are detachable, 'depending on whether said extensions are mounted or not while at the vibratory production machines in which the extensions 8

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». ■ ■■ - ■ '»> > ■

are tiltable, the value of Q, however, always "remains constant»>'

F increases aioh depending on the width of the Sohioht to be applied, I however, said enlargement is usually not proportional to the possible enlargement of G is »

It is important to avoid this disadvantage in the case of the invention Device provided the use of one or more arms 15, the one end is bolted to the main body 10 of the machine while you the other end by a chain 16 odes another pulling element with the Body of the leveling group 5 is connected.

A hydraulic cylinder 24 (Figures 2 and 4), the end of which 24 'on is bolted to the main body 10, while the end 17 * of its piston is bolted to the arm 15, a chain exercises on this latter exciting force from · If now in the cylinder 24 under pressure OeI is given and when the pressure in question is achieved Expedient values are increased, it results in the first place that the Lifting force exerted by the chain 16 on the leveling group 5 Oewioht of the latter reaches and surpasses it, whereby said leveling group is forced to raise itself completely, and do so by several tens of centimeters by turning "around the bolt." 11 rotates, which makes all working and sliding movements of the machine to be greatly relieved "

Then, in order to achieve the desired result, that is to say the control of the druokes exerted by the leveling group 5 on the applied bituminous material, only the. Pressure of the oil in the cylinder 24 piston 17 can be controlled. To this end, the present invention fell ^ one illustrated in Fig. 4, hydraulic system before .- ^ n said figure, is connected to the container 18, a Bezugszshl

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'For which the hydraulisohe Pluidum _t 19 a suction line for said fluid _# 20 a pump, 21 a high-pressure line and designated by 22, a manifold valve, the latter dae oil, the hydraulic fluid in both a · pressure line 23, as well as in the The pressure line 23 is connected to the cylinder 24 of the piston 17. A manometer 25 and a pressure regulator 26 are installed in the pressure line 23 or in the high pressure line 21, the latter being controlled by hand by the Masohinenlenker and serves to control the maximum pressure of the fluid inside the line 23. Said pressure regulator 26 is therefore provided with an unloading tube 27, which allows it to divert part of the fluid into the container 18 and thus has its own regulator function always on the pressure line 23 or on the Hoohdruok line 21 is an elastic reserve container 2 8, which contains a bubble 29 filled with inert gas, the volume of which is slightly larger than the volume of the cylinder 24 The hydraulic system described above allows the handlebar to achieve any desired pressure inside the cylinder 24, as desired, and consequently to give the chain 16 (FIGS. 1 and 2) a tensile force which has any desired value, and which in any case int that the possible deficiencies in equilibrium which occur when passing from one work to another between the various parameters of the above equation and which affect the value of the pressure exerted by the leveling group on the bituminous pavement

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determine, be balanced »

They also ensure the presence of the elastic reserve container 28 Un the correct dimensioning of the bladder 2 ° - · their Volume must be greater than that of the cylinder 24 (in fig 4 said volume is shown smaller for reasons of lack of space) that even in the case of the intended relative movements between the Leveling group 5 and the main frame 10 (which movements both on the irregularities of the already existing street floor, as also based on intentionally decided changes in the wall thickness of the finished road surface) that prevailing inside the cylinder 24 The pressure and, as a result, the tension of the chain 16 remain practically unchanged «

As a result, the driver receives the information from the pressure gauge 25 controls, allows, with the greatest ease and accuracy, the pressure of the hydraulic pressure inside the cylinder 24 Fluiduras, as well as that of the chain 16 on the leveling group 5 transferred tension force and ultimately, as this is precisely the purpose of the present invention, the level through the · » Group 5 relied on bituminous materials during their various phases of work Material existing and applied by the masohine To keep the pressure exerted under control "

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Claims (1)

/ i «« jAn ait leveling devices of the self-leveling type provided » Machines for the application of road surfaces attachable gate direction, which is verbolat on the frame of the machine in question, characterized by at least one arm and a pulling element, which due to the action of one working in turn with fluid pressure Mechanism to exert a lifting force on the leveling group itself * 2 - Vo device according to claim, characterized in that the same comprises means of adjusting the pressure in the Hi- Hubzaechanismus velliergruppe a working fluid, 3 ·· Device according to claims 1 and 2, characterized in that the » the setting means comprise at least one of the devices listed below »a manometer a controllable regulator organ for setting the maximum pressure, as well as an elastic one Reserve pressure vessel 4 · - Device still claim 3 »characterized in that the elastic reserve pressure vessel is of the type of a bladder filled with inert gas *. Λ 5, - Device according to claim 3 »characterized in that the elastic Reserve pressure vessel of the counterbalanced type is 6 _# device according to claim 3f, characterized in that the elastic reserve pressure vessel is of the free level type 7 - Apparatus according to claim 4t characterized in that when the elastic reserve of the pressure vessel ^rn ypes an inert gas-filled bladder is a valve for adjusting the pressure of the gas contained in the bladder provided ^ date set out ist.- 909 83 1/0 U 9 ΆΟ - Blank page