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Glossary entry

French term or phrase:

échelle racleuse

English translation:

push floor

Added to glossary by Claire Cox
Oct 22, 2009 12:05
14 yrs ago
4 viewers *
French term

échelle racleuse

French to English Tech/Engineering Energy / Power Generation Biomass boilers
Yet another obscure device for unloading wood fuels from silos:

Alimentée selon le projet par un système vérin poussoir ou dans le cas d’un combustible maitrisé (réf G20 à G50) par une vis, elle est compatible avec tous types de transferts (vis ou convoyeur) depuis un silo à **échelles racleuses** ou des systèmes à désileurs planétaires et bras articulés.

I've come across ladder scrapers on various sites but these have all been translated from French, so I'm somewhat dubious. I've asked for a picture, but nothing forthcoming yet.

Many thanks again
Proposed translations (English)
3 reclaimer
3 griddle

Discussion

Bourth (X) Oct 22, 2009:
I haven't researched "push floor" any further but as I understand it, it's a system that while having reciprocating elements, remains in the same plane at all times, so its purpose is "simply" to loosen a material. AIUI, toujours, a walking floor has parallel beams which, in a reciprocating movement, MOVE a material in a particular direction, i.e. one set of (alternate) beams is raised, moved forward, lowered (depositing the material a certain distance forward), and moved back. Either it resumes its cycle for another step forward, or the second set of beams engages its cycle (is raised) when the first set has reached the end of its forward movement. This would result in faster movement than with a "single action" walking floor. Walking floors are used to discharge stuff from trucks for example (my cement client has waste fuel delivered in semitrailers with walking floors), i.e. where there is headroom and not a great weight of material above, I imagine. I can't see walking beams being used in silos - what point in lifting the contents, impossible anyway with powders etc.
Claire Cox (asker) Oct 22, 2009:
Entry from the above ref. file ..which seems to fit in with the picture in Chris' link:

As opposed to a sliding frame, A variation in the design is the ‘walking floor’ type. This consists of a flat silo floor frame divided into several strips, which oscillate alternately to and fro alongside each other. At one end of the assembly there is a clearance down which solids fall on to a screw conveyor.
Claire Cox (asker) Oct 22, 2009:
Sliding frame/walking floor Re your latest addendum Alex, I've just come across a useful report about various types of silo discharging equipment and wondered if this might be the sliding frame or walkng floor described on page 29 of the report in the link:

Discharge Aids
- 04:40
are often used to secure discharge and empty the contents of silos ...... Bins/hoppers/silo discharger systems can be operated in a number of ways. ...
www.shapa.co.uk/pdf/techdata12.pdf -

Proposed translations

13 mins
Selected

reclaimer

Only a few days ago I came across gratteur and jeteur, in the context of storage of crushed rock for making cement, and they turned out to be "reclaimer" and "scraper" respectively. These may be related.

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Note added at 23 mins (2009-10-22 12:28:18 GMT)
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Le fond racleur ou échelles racleuses
(Cf. schéma de principe dune chaufferie de moyenne à forte puissance ci-dessus.)
Il se compose d'échelles placées à plat, au sol, au fond du silo. Ces échelles, par un mouvement de va et vient alternatif, extraient le combustible jusqu'au système de transfert. De là, le combustible suit le même chemin que pour le dessileur rotatif.
Ce type de déstockage est utilisable dans tous les projets. Il est cependant plus coûteux que les systèmes rotatifs. Il sera donc majoritairement utilisé dans les cas suivants :
www.ofme.org/bois-energie/chaudieres.php

Thinking about it, it seems to me there was a question about such a system a short time ago, though "échelle" may not have been in the expression. Irritating not being able to remember ...

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Note added at 36 mins (2009-10-22 12:42:00 GMT)
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Same or similar to "cadre racleur" as used in silos? "Cadre" may well have been the word in a related Kudoz Q a short time ago. ...

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Note added at 45 mins (2009-10-22 12:50:58 GMT)
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Phew, it took me a while, but I got it. Push floor.

a PUSH-FRAME (20) which can be pushed back and forth hydraulically over the silo floor (14) over the discharge channel (22) between first and second ...
www.patentstorm.us/patents/6190105/claims.html

The bottom of the silo is con- structed with a SCRAPER FRAME and a discharge screw conveyor which together function as a pre-press. In a ...
www.volund.dk/content/.../Waste water sludge_eng_pdf.pdf

in a round silo, an eliptic scraper cut out a product slice and discharges it into the ... for a smooth backward and forward motion of the SCRAPING FRAME, ...
www.lessinesindustries.com/en/...1/silo-discharge-system/

Now this is definitely ringing bells: sliding frame
Features of SLIDING FRAME and PUSH FLOOR technology: • Vertical silo and bin .... ACME ACRS Automatic Scraper Strainers are used in nearly every industry. ...
www.wefbuyersguide.com/productshowcase.php?...Frames

The SLIDING FRAME Silo is a simple machine consisting of either one or two hydraulic cylinders driving a frame that reciprocates across the silo floor. ...
www.schwing.com/04_indu_muni/discharge/dis_sf.html

Yes, I remember the name Saxlund:
SLIDING FRAME technology was developed and Patented by Saxlund back in the 1960's as a method of discharging non-free flowing materials from a round flat ...
www.saxlund.co.uk/index.php/sliding-frames.html

Fausse piste .... Here, at least, it's not a ladder but a racket:
http://www.saxlund.co.uk/index.php/sliding-frames.html

But, but, but .... here we have a "push floor" :
The PUSH FLOOR is driven by a hydraulic system that moves a number of parallel Pusher Elements or 'LADDERS' in reciprocating motion across the bunker flat floor. As it does so it digs the stored bulk solid material from the bunker and delivers it to a screw conveyor or other machines. Either the screw or the Pusher Elements themselves perform the required metering function from the bunker
http://www.saxlund.co.uk/index.php/products/push-floors.html
(with videos and animations)
Cf "push frame" above.


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Note added at 1 hr (2009-10-22 13:23:51 GMT)
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More on push floors:
The Push Floor is a simple machine consisting of a series of hydraulically driven Push Frames (or ladders) that reciprocate along the bunker floor. ...
www.schwing.com/04_indu_muni/discharge/dis_pf.html

The Push Floor is an "original" discharger design by Saxlund for squere and rectangular bunkers. It is designed to function with non free flowing and ...
www.saxlund.se/eng/stang.html

File Format: PDF/Adobe Acrobat - View as HTML
PUSH FLOOR DISCHARGER. Each PUSH FLOOR generally consists of a series of pusher frames or ladders located on bearing beams. These beams travel through ...
www2.scriptor.no/tratecgroup.com/.../Stangmater%20ENGELSK.pdf

This one might be particularly applicable to your renewable energy scene:
Push floor systems come into play when dry substrates with little fiber content need to be stored and conveyed. Push floors can handle digester substrates ...
www.renewable-energy-concepts.com/.../push-floor.html

Agdermaskin push floor dischargers has been known in the industry over many years as solid and reliable. Even with some competition in the market our push ...
www.agdermaskin.no/default_en.asp?vis...fid...t...

Push Floor: Robsons 'Push Floor' system is a cost effective solution engineered with the latest technology. It gives 100% guaranteed delivery of hard to ...
www.hub-4.com/directory/.../geo-robson-co-conveyors-ltd -
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "Many thanks for all your research efforts!"
21 mins

griddle

This is the best I can come up with. However, there is a nice picture of them at: http://www.ofme.org/bois-energie/chaudieres.php and a description:
"Il se compose d'échelles placées à plat, au sol, au fond du silo. Ces échelles, par un mouvement de va et vient alternatif, extraient le combustible jusqu'au système de transfert. De là, le combustible suit le même chemin que pour le dessileur rotatif."
Note from asker:
Brilliant site, Chris - many thanks! I see Alex has come up with the same reference too. So much better when you can actually see a picture of what's going on!
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