SI22149A2

SI22149A2 - Mixing element for forced mixing in a mixing concrete shovel

Info

Publication number: SI22149A2
Application number: SI200500260A
Authority: SI
Inventors: Rafko Voje
Original assignee: Hidravlika In Mehanika Raf D.O.O.
Priority date: 2005-09-14
Filing date: 2005-09-14
Publication date: 2007-04-30

Abstract

(57) The mixing element for forced mixing in a concrete shovel enhances the quality and speed of mixing while at the same time it also reduces the energy consumption. The mixing element consists of a left (1) and right (2) external sectional wormwheel, which are pushing the material from the sides towards the centre, and an internal segment-structured wormwheel (3) and (5), filling the area between the shaft and the external sectional wormwheel thus pushing the material in the opposite direction regarding the external wormwheel. The concept of the mixing element enables simple production which is from the aspect of material consumption also very effective.

Description

MEŠALNI ELEMENT ZA PRISILNO MEŠANJE v Mešalni zajemalki za betonMIXING ELEMENT FOR FORCED MIXING in Concrete Mixer

Predmet izuma je mešalna zajemalka za beton z novo izvedbo mešalnega elementa zaradi katerega se povečata kvaliteta in hitrost mešanja.The object of the invention is a concrete mixer with a new design of the mixing element which increases the quality and speed of mixing.

Mešalna zajemalka za beton je dodatno orodje za delovne stroje (bagerje, nakladalnike, traktorje in viličarje). Večinoma se uporablja kot zamenjava obstoječe delovne zajemalke. Uporablja se na gradbiščih, terenu oz. tam, kjer rabimo hitro določeno količino betona.Concrete mixer is an additional tool for working machines (excavators, loaders, tractors and forklifts). Mostly used as a replacement for an existing work scoop. Used on construction sites, terrain or where we need a quick amount of concrete.

Tehnični problem, ki ga rešuje izum je takšna konstrukcija mešalnega elementa, ki omogoča enostavno in glede porabe materiala učinkovito izdelavo, hkrati pa se izboljšajo tudi tehnološki parametri mešanja.The technical problem solved by the invention is such a design of the mixing element, which makes it easy and efficient to produce the material, while also improving the technological parameters of the mixing.

Znanih rešitev mešalnih elementov v mešalnih zajemalkah za beton je precej. V največ primerih se uporabljajo različne izvedbe polžev in mešalna pedala.There are many known solutions for mixing elements in concrete mixers. In most cases, different worm designs and mixing pedals are used.

Rešitev z mešalnimi pedali je opisana v patentu US4268174. Pomanjkljivost te rešitve je ostajanje nezmešanega materiala ob pogonski gredi.The mixer pedal solution is described in US4268174. The disadvantage of this solution is that it remains unmixed material along the drive shaft.

Poznani sta dve izvedbi mešalnega elementa, ki izrabljata princip polža.Two embodiments of the mixing element are known to exploit the principle of the snail.

Prva znana rešitev je mešalni element, ki je izdelan iz zunanjega pasovnega polža ki potiska material od ene stranice mešalne zajemalke proti drugi in notranjega segmentnega polža, ki zapolnjuje prostor med pogonsko gredjo in zunanjim pasovnim polžem in potiska material v nasprotni smeri kot pasovni polž. Pomanjkljivost te rešitve je relativno dolg čas mešanja.The first known solution is a mixing element made of an external belt auger that pushes the material from one side of the mixer to the other and an internal segment auger that fills the space between the drive shaft and the outer belt auger and pushes the material in the opposite direction as a belt auger. The disadvantage of this solution is the relatively long mixing time.

Druga znana rešitev je mešalni element po patentu VVO9214887, ki je sestavljen iz levega in desnega pasovnega polža, ki potiskata material proti sredini zajemalke kjer se material med seboj meša. Slaba stran te rešitve je kopičenje materiala na sredini zajemalke.Another well-known solution is the mixing element according to patent VVO9214887, which consists of left and right belt augers, which push the material towards the center of the scoop where the material is mixed with each other. The downside to this solution is the accumulation of material in the middle of the scoop.

Izum bo opisan na izvedbenem primeru in sliki, ki ga prikazujeThe invention will be described in the embodiment and in the drawing showing it

Slika 1 mešalna zajemalka z mešalnim elementom v aksonometrični projekcijiFig. 1 Mixer scoop with mixing element in axonometric projection

Mešalni element predstavlja zvarjeno celoto iz pogonske gredi (4), na katero so privarjene lopatice desnega in levega segmentnega polža (3) in (5). Na vrh lopatic sta privarjena leva in desna vijačnica pasovnih polžev (1) in (2).The mixing element represents the welded unit from the drive shaft (4) to which the blades of the right and left segment augers (3) and (5) are welded. The left and right helix of the belt snails (1) and (2) are welded to the top of the blades.

Lopatice segmentnega polža so izdelane z rezanjem iz pločevine, vijačnica pasovnih polžev pa se izdela z krivljenjem ploščatega jekla.Segment snail blades are made by sheet metal cutting, and the belt snail helix is made by bending flat steel.

Nova izvedba mešalnega elementa ima naslednje izboljšane karakteristike (prednosti):The new design of the mixing element has the following improved characteristics (advantages):

- 95% izkoristek materiala (zunanji obroč krivimo iz ploščatega materiala -100% izkoristek), notranji segmenti so rezani iz pločevine- 95% material yield (the outer ring is made of flat material - 100% yield), the inner segments are cut from sheet metal

- 95% pokrit presek mešanja, kar pomeni, da v Mešalni zajemalki ni žepov, kjer bi lahko zastajal material- 95% mixing cross-section, which means that there are no pockets in the Mixer scoop where material can stall

- ni kopičenja materiala- no accumulation of material

- zaradi potovanja materiala v štirih smereh se hitrost mešanja poveča za 35%- due to the movement of the material in four directions, the mixing speed is increased by 35%

Mešalni element za prisilno mešanje v Mešalni zajemalki za beton je glavni element Mešalne zajemalke, od katerega je odvisna kvaliteta in hitrost mešanja, ter potrebna moč za pogon.The forced mixing mixer in the Concrete Mixer is the main element of the Mixer, which depends on the quality and speed of mixing, and the power required to drive it.

Claims

PATENT APPLICATION

1) The forced mixing mixer element in the Concrete Mixer is characterized in that it consists of a left (1) and a right (2) outer belt auger that pushes the material away from the sides of the center and inner segment auger (3), and (5), which fills the space between the shaft and the outer belt auger and directs the material in the opposite direction, like an external auger.