DE1549210A1 - Remote calibration device for dosing unit - Google Patents

Description

FerbedtephvochiyDpaieinheit Zum kon? 'x. b c °,:, °. r. '° bänderödepvibrRto? Ang $ TriebeReFoF & aFlEneneingend.Rope conveyor belts or vibrator-driven conveyors are used. Should be the amount of the transported Schättgutes also continuous; E. ', P -;' <gß3C & "* '!' 3 .- '.,' '' '' Rt, ', f?;? 4r'AöC a.:';,::'iJ5R'5'Baadsieks'esBe.BeBgagcla§9y'~ @epertrinne so @ onannts Desieroimbeiten Anseorder, Des ain @ @@@@ with possible same speed, independent ang @@ tricb @ ne pieces of tape, the frame of which can be rotated @ or fred keweglich aufäag @ is, Dis Auslen @ ung the for example with a feather supported @ndes of the Rabmene The movement of the frame itself is the measure of the amount of the product, which is transported on this Eaudstück wi @ d, becomes the passage of the bulk material only measured or set by @and, so sewn without a mechanical display device in the shape of a cheek @@@@.

However, electrical components are required for automatic flow control necessary. For example, the amount of bulk goods a Beatimmte bearing force of the free end of the weighing belt by means of a commercially available electric load cell or eir. it detects the force transducer.

'' These devices emit an electrical signal proportional to the force which can be increasingly used to regulate the feed device.

Because the entire system and especially the electrical components are subject to fluctuations over longer periods of time and have no absolute constant Frequent calibration is necessary to achieve a uniform weighing result. It is. known, at the free end of the '.Taageband? .jsvi'sche' Aufn & bisenEichgewichteein - @@ egen, d @@ @ the @@ se @@ location Ma @@ can be adjusted.

Grä @@ en @ @ automatic dosing @@@@@ @@@ @@@ @ the eitstand possible @ iron @@@ @ the @ elerbandwaage unterge - @@@@ @@@ @ ali @ if at one big - @@@ @@ dwe @@ arall @ @rheiten and the @ du @ Bel @@ @@@ be @@@ ch gün - ".. 'i-j, - ..' 1, wemibeinejrös - @@@ ges @@@ @@@ @d DasMash @ @@ en @ erb # e @more distant 'iJ'. 'i .... T.-'.''-' j.Mmgeinequite :; £ r. ~ v, ~ ~~:,. T ~. t:. : ~ t: t: c between Per. Aor, the To be able to communicate with one another, to work together: one person sets the calibration weights on the weighfeeder, the other calibrates the devices at the control station. or a person must clear the way between each calibration process and putting on weight Do the weighfeeder and power stand at least twice.

A major operational relief is provided by a remote control Calibration device for automatic weigh belt feeders achieved, in the case of the # the calibration weight is applied by means of one or more electromagnets.

The excitation of these electromagnets can easily be done by pressing a button by assistance, so that # it takes a fraction of the time otherwise required The structural design of this arrangement according to the invention can done in different ways. A few are possible based on the accompanying drawing Examples shown.

Fig. 1 shows schematically the overall structure of a weighfeeder below Use of the remote-controlled calibration device in accordance with the contract. The weighfeeder consists of the treg frame 1 at both ends of which the rollers 2 and 3 are arranged and one end of which is mounted in the fixed support 4.

The belt runs around rollers 2 and 3 at an even speed 5 .mu.m, which is fed, for example, from the channel 6, which is fed by the vibrato 7 depending on the displayed Quantity on the weighfeeder is driven. The amount of material on the weighfeeder will be by the indicated electrical force measuring element 8, for example a load cell, felt and forwarded to the evaluation devices.

Reliable calibration of the electrical components, the sensing element and the VeretCrker and control elements, can only be done mechanically: d. H. A defined calibration weight must be placed on the weighfeeder. In the normal case, this calibration weight 9 rests in a bearing in the example shown 10. On a boom 11 of the frame 1 of the weighfeeder are according to the invention For example, two electromagnets 12 attached, the open magnetic legs of which are located at a small distance above corresponding iron parts of the calibration weight 9. When these electromagnets are energized, they attract the calibration weight and thus put a strain on them Belt weigh feeder exactly by the weight of this calibration weight.

Of course, there must be a magnetic inference about the bearings of the Calibration weight must be avoided, as otherwise the calibration would be falsified.

In Fig. 2 the front view of this arrangement is shown.

In addition, the excitation of the electromagnets 12 is shown, which for example, via a rectifier 13, in order to achieve a gentle tightening he follows. By means of the switch 14, which can be turned on in the control room, for example, the Excitation of the electromagnets switched on.

The arrangement can also be carried out in this way, then on the analog 11 of the frame 1, the relatively light armature of the magnet is attached. The relative Heavy magnets form a calibration weight with a suitable connecting rod. As a result, the dead weight of the magnets is advantageously also used as a calibration weight.

This arrangement is useful because the accuracy of the weigh belt weigher is all the greater, with a smaller ratio Dead weight to net weight is. For the same reason, it can be useful to use the Solenoid not to be attached to the swinging arm of the Dosierbandwa su, but to be arranged separately on the solid floor or on the frame, in FIGS. 3 and 4 possible constructive designs of this further inventive concept are shown, Here, the calibration weight 9 with a Hebei 20 is constantly above the recordings of the Dosing belt held in suspension. The lever 20 is rotatable in a bearing 16 stored and is, as shown in the diagram, at-? Hebcl, lever discount constantly above the recordings of the dosing belt in! i ': c - :. esNfallasefeinercbar-eigenVeriasgengdea : .jgjag'Qwi.ioRgeGneeciRde.ouiesolbeFk-o'cls ge -; (r'.9. '', '.: ls'rtIa'tI1's "r4'm' '' yG, .." C9acG ~ J, ' . ".. '", fa'w.' das Lc '.' "3lG'b'j.s-oiz.GoolbslEssRicinPig.dar-GC3uol?.,. ls" cREC '& QQ.a'6'fSnsoiadcFbeiSreNg : .t9.'s'L '. "' 'rRra'ü'st,' ed'H.s" 3c'BichgeicLi'die '' - '"cr.'a'c ..

Planes: @@@ @ counterweight be arranged, the same radio - @@@@ @@ @ The Elektro @@ gnet itself can, as in Fig. 5 dargesbell @ as @@ ehmag @ et 15 be extended, the He @@? @@ to unton @@ when excited, weduren the calibration weight in the @@ @@@ Eoug @ @ @@ Wenschalkon @@@ ralest @@@ In @@@@ Elekt @@@@ @@ as Zu @@ g @ c @ trained @ the which has the same effect, namely pulling it down of the lever 20, opposite to that, a counter anchor would have to be arranged on the lever 20.

Here, too, the electromagnets are expediently excited with current rectified by the rectifier 13, which is passed through the switches 14 is switched on as required. s With the arrangement according to the invention, considerable Operational savings achieved by changing the electrical at any time without great expense Plant can be viewed, so that # also the result as a result of the lighter and therefore recalibration that takes place more often becomes more e @ akter and better.

6 pages description 4 claims 2 sheets of drawings with

Claims (4)

P a t e n t a n s p r ü c h e 1. Remote calibration device for automatic dosing unit, characterized in that the calibration weights takes place by means of one or more electromagnets. 2. Calibration device according to claim 1, characterized in that the balance arm oscillating between the or the eleMagneteMagnete are attached and, when excited, tighten the calibration weight below them. . 3. Calibration device according to claim 1 and 2, characterized in that uet, electro agn ete are directly part of the calibration weights and the associated ones Anchors are arranged on the movable balance door, so that # when the electromagnet is excited these together with the calibration weight are attached to the balance frame. 4. Calibration device according to claim 1, characterized in that # da # Calibration weight when at rest in a bellows by spring tension or counterweight in a raised position above the mount on the swinging end of the scale held and when excited a rotating or pulling electromagnet by lowering the lever device is inserted into the receptacle at the end of the scale. Lez rosette