HRP920108A2

HRP920108A2 - Plan sifter cleaner

Info

Publication number: HRP920108A2
Application number: HRP920108AA
Authority: HR
Inventors: Franjo Novak
Original assignee: Franjo Novak
Priority date: 1992-05-06
Filing date: 1992-05-06
Publication date: 1994-04-30
Also published as: HRP920108B1

Description

Oblast tehnike u koju spada izum The technical field to which the invention belongs

Izum spada u sekciju obrada i prerada i u podsekciju odvajanje i miješanje, a naročito u područje razdvajanje čvrstih materijala, sortiranje. The invention belongs to the section of processing and processing and to the subsection of separation and mixing, and especially to the area of separation of solid materials, sorting.

Prema Međunarodnoj klasifikaciji patenata predmet izuma je klasificiran i označen oznakom B 07 B 1/52 kojim su definirani sastavni dijelovi sita i to strugači za čišćenje sita. According to the International Classification of Patents, the subject of the invention is classified and marked with the code B 07 B 1/52, which defines the component parts of the sieve, namely scrapers for cleaning sieves.

Tehnički problem Technical problem

Tehnički problem koji se rješava ovim izumom sastoji se u slijedećem: kako riješiti čistač planskih sita koji će efikasno odstranjivati dijelove prosijanih i prilijepljenih žitarica sa planskog sita, biti dovoljno elastičan da ne oštećuje materijal sita te biti dovoljno trom da ne slijedi pokrete planskog sita nego zbog kašnjenja u kretanju skida dijelove žitarica sa sita i ujedno uslijed vertikalnih pomaka u prostoru u koji je čistač ugrađen pospješuje prosijavanje i čišćenje materijala sita. The technical problem that is solved by this invention consists in the following: how to solve a planar sieve cleaner that will efficiently remove parts of sieved and adhered grains from the planar sieve, be elastic enough not to damage the material of the sieve and be slow enough not to follow the movements of the planar sieve, but because delays in the movement removes parts of grain from the sieve and at the same time, due to vertical movements in the space where the cleaner is installed, it accelerates the sifting and cleaning of the sieve material.

Stanje tehnike State of the art

Planska sita koja se primjenjuju kod prosijavanja žitarica nakon mljevenja, prosijavanje se obavlja tako da se mljevene žitarice propuštaju preko okvira sa sitom na kojima se vrši odvajanje većeg granulata koje ne prolazi kroz sito. Okviri sita poredani su jedan povrh drugog tako da tvore kolonu za sijanje. Izborom otvora na situ određuje se tehnološki postupak sijanja odnosno dobiva se prosijani materijal određene granulacije. Da bi se omogućilo sijanje cijelo plansko sito kreće se kružno ili u određenoj amplitudi, okomito na smjer sijanja. S tim gibanjem sita postiže se mogućnost prolaza mljevenog materijala kroz sito. Granulat koji nije prošao kroz sito odvodi se posebnim odvodom iz sita. Planar sieves, which are used for sieving grains after grinding, sieving is performed so that the ground grains are passed over a frame with a sieve, on which the separation of larger granules that do not pass through the sieve is carried out. The sieve frames are arranged on top of each other to form a sowing column. By choosing the opening on the sieve, the technological process of sowing is determined, that is, the sieved material of a certain granulation is obtained. In order to enable seeding, the entire planar sieve moves in a circle or in a certain amplitude, perpendicular to the direction of seeding. With this movement of the sieve, the possibility of passage of ground material through the sieve is achieved. The granulate that did not pass through the sieve is drained from the sieve through a special drain.

Okvir sita sastavljen je od materijala sita, a to je najčešće svila, griz gaza ili metalno pletivo. Taj materijal zategnut je na drvenom okviru sa drvenim ojačanjima kako ne bi dolazilo do deformacije materijala sita na okviru uslijed težine materijal koji sijemo. The sieve frame is made of sieve material, which is usually silk, cheesecloth or metal mesh. This material is tensioned on a wooden frame with wooden reinforcements to prevent deformation of the sieve material on the frame due to the weight of the material being sown.

Kod takovih okvira dolazi do začepljenja materijala sita materijalom koji sijemo. Takovo začepljenje ili zapunjenje otvora na situ smanjuje propusnost sita i izaziva zastoje u radu cijelog planskog sita jer zahtjeva prekid rada planskog sita, a i svih ostalih uređaja povezanih sa njima u tehnološku cjelinu i iza toga čišćenje pojedinih okvira od materijala koji je izazvao začepljenje. Ukupan postupak čišćenja izaziva nenadoknadiv gubitak u kapacitetu planskog sita odnosno tehnološke cjeline, a izaziva i dodatno trošenje materijala sita uslijed čišćenja odnosno prije čišćenja uslijed zapunjenja. Takove tehnološke cjeline u koje je uključeno i plansko sito ne podnose dobro prekide u radu, jer kod puštanja ponovo u rad potrebno je uskladiti sve parametre u tehnološkoj liniji što može izazvati smanjenje efikasnosti linije ili izazvati gubitke u dobivanju mljevenog materijala. In the case of such frames, the sieve material is blocked by the material being sown. Such clogging or filling of the opening on the screen reduces the permeability of the screen and causes stoppages in the operation of the entire plan screen because it requires the interruption of the work of the plan screen and all other devices connected to them in the technological unit, and after that the cleaning of individual frames from the material that caused the clogging. The overall cleaning procedure causes an irreparable loss in the capacity of the planned sieve or the technological unit, and also causes additional wear of the sieve material due to cleaning or before cleaning due to filling. Such technological units, which include a planar sieve, do not tolerate work interruptions well, because when restarting, it is necessary to harmonize all parameters in the technological line, which can cause a decrease in the efficiency of the line or cause losses in obtaining ground material.

Čišćenje materijala sita može biti mehaničko ili pomoću struje zraka. Nedostatak oba postupka je u tome što se vrlo lako oštećuje materijal sita i na taj način mu se smanjuje rok trajanja, odnosno gubi kvaliteta otvora na materijalu sita. The cleaning of the sieve material can be mechanical or by air current. The disadvantage of both procedures is that the sieve material is very easily damaged and thus its shelf life is reduced, i.e. the quality of the openings on the sieve material is lost.

Upotrebom čistača planskih sita postignuto je da se sito čisti za vrijeme rada planskog sita. Čistač je ugrađen u okvir sita tako da stalno čisti sito i dolazi u svaki kut okvira, a i dodatno vibrira materijal sita tako da pospješuje prosijavanje, dok je dovoljno mekan i elastičan da ne oštećuje materijal sita. With the use of planar sieve cleaners, it was achieved that the sieve is cleaned during the operation of the planar sieve. The cleaner is built into the sieve frame so that it constantly cleans the sieve and reaches every corner of the frame, and additionally vibrates the sieve material so that it improves sifting, while it is soft and elastic enough not to damage the sieve material.

Opis rješenja tehničkog problema Description of the solution to the technical problem

Na slici 1 prikazan je položaj čistača planskih sita u okviru planskog sita. Figure 1 shows the position of the plan sieve cleaner in the plan sieve frame.

Na slici 2 prikazan je tlocrt sa slike 1. Figure 2 shows the floor plan from Figure 1.

Na slici 3 prikazan je nacrt čistača planskog sita. Figure 3 shows a plan screen cleaner design.

Na slici 4 prikazan je tlocrt čistača sa slike 3. Figure 4 shows the floor plan of the cleaner from Figure 3.

Okvir planskog sita sačinjen je od drvenog okvira koji je uložen u vodilice na planskom situ. Na drveni okvir učvršćen je materijal sita 1. Okvir sita ispod materijala sita 1 ojačan je poprečnim i uzdužnim drvenim letvicama 2. Te letvice 2 drže materijal sita 1 i smanjuju mehaničko opterećenje materijala sita 1. Materijal sita 1 je iz svile, griz gaze ili metalnog pletiva točno određenih dimenzija otvora, a što je određeno tehnološkim zahtjevom. The frame of the planar sieve is made of a wooden frame that is inserted into the guides on the planar sieve. The sieve material 1 is attached to the wooden frame. The sieve frame under the sieve material 1 is reinforced with transverse and longitudinal wooden slats 2. These slats 2 hold the sieve material 1 and reduce the mechanical load on the sieve material 1. The sieve material 1 is made of silk, cheesecloth or metal knitting with precisely defined opening dimensions, which is determined by the technological requirement.

Ispod okvira i letvice 2 učvršćena je žičana mreža 3 sa razmakom žica od 10-20 mm. U prostor između materijala sita 1 i mreže 3 postavi se čistač planskih sita 4 koji je četvrtastog oblika. Čistač planskih sita 4 je izrađen od tkanog dijela 4.1 koji je iz materijala povećane čvrstoće i elastičnosti kao što su materijali dobiveni trodimenzionalnim tkanjem kod kojeg A wire mesh 3 with wire spacing of 10-20 mm is fixed under the frame and slat 2. In the space between the material of the sieve 1 and the net 3, a planar sieve cleaner 4, which is square in shape, is placed. The planar sieve cleaner 4 is made of woven part 4.1, which is made of materials of increased strength and elasticity, such as materials obtained by three-dimensional weaving in which

su dužine niti osim tkanja u dvije dimenzije (osnova i potka) prepletena i u treću dimenziju (debljine) i na taj način dobiven je materijal većeg volumena. Takav tkani dio 4.1 sa donje strane na sredini donje baze opremljen je sa metalnim are the lengths of the threads, in addition to weaving in two dimensions (warp and weft), interlaced in the third dimension (thickness) and in this way a larger volume material was obtained. Such woven part 4.1 on the lower side in the middle of the lower base is equipped with metal

utegom 4.2 koji sa gornje strane naliježe na ravnu stranu tkanog dijela 4.1, a sa donje je sferičnog oblika. Tkani dio 4.1 i uteg 4.2 su čvrsto spojeni. weight 4.2, which on the upper side rests on the flat side of the woven part 4.1, and on the lower side is spherical in shape. The woven part 4.1 and the weight 4.2 are firmly connected.

Tako izrađeni čistač 4 umetnut je u svaki prostor između materijala sita 1 i mreže 3 unutar četverokuta kojeg formiraju letvice 2. Uslijed gibanja cijelog planskog sita, a to gibanje je kružno ili u jednom pravcu dolazi do kretanja čistača 4 po omeđenom prostoru između letvica 2, tako da čistač 4 prilazi svim uglovima tog prostora i čisti materijal sita 1. Uslijed težine ostvarene utegom 4.2 čistač ima određenu tromost, u odnosu na okvir sita, tako da kasni za kretanjem sita, a kretanjem po mreži 3, uteg 4.2 koji je sa donje strane sferičnog oblika poskakuje po mreži 3 i na taj način trese materijal sita 1 i na taj način pospješuje prosijavanje i čišćenje materijala sita 1. The cleaner 4 made in this way is inserted into each space between the material of the sieve 1 and the mesh 3 inside the quadrangle formed by the slats 2. As a result of the movement of the entire planar sieve, and this movement is circular or in one direction, the cleaner 4 moves in the limited space between the slats 2, so that the cleaner 4 approaches all corners of that space and cleans the material of the sieve 1. Due to the weight achieved by the weight 4.2, the cleaner has a certain inertia, in relation to the sieve frame, so that it lags behind the movement of the sieve, and by moving along the mesh 3, the weight 4.2 which is from the bottom on the sides of the spherical shape, it bounces on the mesh 3 and thus shakes the material of the sieve 1 and thus accelerates the sifting and cleaning of the material of the sieve 1.

Claims

1. Planar screen cleaner 4, which is installed in the area of the planar screen frame, which is formed with longitudinal and transverse slats 2, and on the upper side with the material of the screen 1, and on the lower side with the net, indicated by the fact that the textile part (4.1) made of woven material woven by three-dimensional weaving firmly connected to the weight (4.2) with a spherical shape of the lower part located in the middle of the lower base of the textile part (4.1) which is square in shape.