RSH

Plansifters RSH-4 and RSH-6 are designed for fractionation of wheat ground material by size at flour mills. Plansifters may be applied for sorting of other crops ground material.


Plansifter may be operated indoors with explosion-hazard area - in accordance with Operation Standards for Electrical Equipment PUE and in production facilities B category in accordance with construction rules and regulations SNiP II-90-81 at a temperature from 10 () degrees above zero to 45 () degrees above zero. Plansifter is produced in accordance with National State Standard GOST-15150-69 climate version ǔ (tropical climate).

Plansifters RSH-4 and RSH-6 are designed for fractionation of wheat ground material by size at flour mills. Plansifters may be applied for sorting of other crops ground material.


Plansifter may be operated indoors with explosion-hazard area - in accordance with Operation Standards for Electrical Equipment PUE and in production facilities B category in accordance with construction rules and regulations SNiP II-90-81 at a temperature from 10 () degrees above zero to 45 () degrees above zero. Plansifter is produced in accordance with National State Standard GOST-15150-69 climate version ǔ (tropical climate).


Specifications   

Parameter title RSH-4 RSH-6

Technical capacity (load) on the 1 break, t/h, min.

16*

23,5*

The average extraction factor of all components, %, min.:

 

 

On the 1st break (with technical capacity min. 4 t/h per section)

64*

64*

On the 4th break (with technical capacity min. 1,7 t/h per section)

94*

94*

Quantity of product inputs (sections), pcs.

4(4)

6(6)

Quantity of receiving devices, pcs.

2

2

Total rated active sieves area, m2

18

27

Body oscillations frequency at idling speed, -1 (vibrations per minute)

-3,7( 220)

-3,7 (220)

- 4,0 (240)

Radius of the body circular oscillations, mm


452 412 

      

472 402

Air consumption for aspiration, m3/h, within (for flour mills with mechanical transport)   

720-1020

960-1440

Aerodynamic resistance, Pa, within

150-300

150-300

Rated electric motor power, kW

4

4

Overall dimensions, mm, max.

- height of the housing

- length

- width

- height to the feed board

 

2430

1440

2370

 

3090

2020

2370 

Weight, kg, max

2030

3050

Notes:

1* Indicators values for sorting of wheat ground material.

2** For technical capacity on the 1st break.


Plansifter is produced in seven versions that differ by sections functional schemes, which configuration is shown on fig.1.2.


Structure and Functioning


Plansifter is represented by modular cabinet construction with sliding frames. Plansifter body 12 (fig.1.4.1) is suspended on four steel ropes 9 by suspensions 2 to the ceiling frame of production facility. Ropes ends are fixed in locks 11, which are mounted on body side brackets by wedges 24. Two receiving units 4 are suspended to the ceiling over the plansifter body on bars 3 and holders 1. Floor nozzles or blocks of branch pipes 16 and 17 are installed on the floor under the body. Receiving unit nozzles 25 and floor nozzles are connected with body nozzles 19 and 23 by sleeves 15 and 18. Sleeves are fixed on the nozzles by yoke clamps.


Body consists of cabinet where bracket 8 with drive 5, balancer mechanism blocks 6, protection constructions 7 and 14 are installed. Transport boxes 22 and nozzles 23 for product outlet from the cabinet section are mounted to the body bottom. Plansifter cabinet consists of supporting frame 13. Four section 20 frameworks are fixed on the supporting frame baffles. Eighteen sieve frames with trays are installed in framework guides of every section. Cabinet exterior coat, frame baffles and frameworks guides form side bypass channels. Sections frameworks are closed from the outside by doors 21, removable boxes and walls of which form bypass channels from the side of product receiving. Bypass channels of sections from the side opposite to product receive are made in the form of removable boxes and walls fixed on the brackets of sections frameworks rear pillars. Nozzles (feeders) 19 are installed over every section on the cabinet roof. Bars 10 are fixed on the cabinet side walls. Cabinet frame is welded and consists of metal pipe with flanges for bearings housings of balancing mechanism and four baffles, where roof, bottom, sections frameworks and coats are fixed. Sections framework is represented by two interconnected panels. Each panel consists of two pillars with frames guides fixed on them. Metal angle elements and lugs are fixed on pillars to provide strong attachment of sections in the cabinet. Two wooden plugs are also installed in every pillar that along with intermediate bottom allow to cover side channel of the section. Quantity of intermediate bottoms in the panel depends on the panel version (one, two or totally absent).


Sieve frame (fig.1.4.2.) is made of wooden bars. The frame is divided by bars into 4 cells. Cleaners are designed for cleaning of sieves 3, and one cleaner is putted into each cell before fastening the sieves at flour mills. Cleaner is a piece of cotton belt with metal rivet with a spherical head from below. Sieve frames are accomplished in two versions: single and double-sided. In single-sided frames product that passed through the sieve is transferred only one way to the one side channel; in double-sided to the both sides. Tray is a sheet with bent ends on the short side and two angle elements attached from below, which serve to fix the tray in the sieve body section, to remove tray with frame from the section and to provide it necessary stiffness. Pile cloth pads are glued on the tray angle elements on longitudinal bars of the sieve frame to prevent mixing of separate product fractions, and to provide free movement of frames along sections guides. Flannelette pads are glued between frame and tray and on the middle bars. Sieves at the flour mills can be nailed or stapled with a gun through strapping.


Plansifter door consists of housing 2 (fig.1.4.3), framework 16, bypass boxes 6, 8, 9 and 10, walls 4 and 7, baffles 3, 11 and 12, two outlet nozzles 17 and gaskets 5, which serves for sealing of door elements joints and between door and cabinet section. Body of the box-shaped door is made of aluminum alloy sheet. Brackets are installed on the door sidewalls to waist it to the body section. Brackets 13 and 15 for door hanging and pressing it to the cabinet section are attached to the top wall. There is a semicircular hole edged by angle element and gasket, which is designed to ensure tight fit of the door to the feeder placed on the cabinet roof. Framework serves to give the door more stiffness and to attach removable door elements on it. Framework is a welded frame construction made of angle element and three collars of structural channels. Sets of bypassing boxes and walls installed in doors correspond to the certain functional schemes (in accordance with technological process). They serve for the formation of different product fractions received in the result of sieving on sieves in plansifter sections. Boxes and walls of each door are interchangeable and can be installed as bypass boxes and walls inside the section. In order to reduce plansifter weight parts of doors, frameworks and cabinet coat are made of aluminum alloys.


Plansifter body is driven by V-belt transmission from electric motor. Drive motor is installed on the bracket fixed on the cabinet. Belts tension is accomplished by moving the motor through plate slots with the help of tension bolts. Plansifter kinematic scheme is shown on fig.1.4.4.


Balancing mechanism consists of shaft 6 (fig.1.4.5) installed in bearings supports 5 and 7. Balancers 1 with removable loads 2 and 3, which are necessary for regulation the plansifter oscillations radius, are fixed on the shaft ends. Pulley 4 is installed on the shaft under upper balancer.


Feeders installed on the cabinet roof serve for uniform distribution of initial product to 3 sieve frames and consist of fitting 2 (fig.1.4.6), cone 1 and disk with plate 3. Disk has 12 port holes for passage of the product. Incoming product is divided into three equal parts due to chutes 4 and 5 placed on the fitting.

       

Receiving unit serves for supply of seeds ground material to the plansifter body and for body aspiration. Receiving unit consists of frame 1 (fig.1.4.7), two receiving boxes 2 and nozzles 4. Frame is welded from bent profiles. Plates with port holes are designed for receiving boxes. Holders and rods serve to fix receiving unit. Receiving nozzles serve for connection of gravity flow ducts and aspiration air ducts. Nozzles, which serve to receive the product, are equipped with inspection windows 3.


Floor nozzles serve to receive separated product fractions from the plansifter body. There are two types of floor nozzles: single and twin (nozzles block). Construction of nozzles blocks is shown on fig.1.4.8. Upper nozzles 1 are connected by fabric sleeves with body nozzles; lower nozzles 4 have flanged edge for connection of gravity flow ducts by standard yoke clamps. There is an access hole closed with plug 2 on the upper nozzle, which serves for sampling. The base of nozzles is box 3, which after plansifter installation is poured with concrete. Holes in the box sides are designed for easy installation of nozzles.


Plansifter sections are produced in accordance with four functional schemes (fig.1.4.9). Plansifter can be produced in seven basic versions RSH-4 00.000÷RSH-4 00.000-06 (fig.1.2) depending on arrangement of sections with specific functional schemes in the sieve body. Besides basic versions manufacturer is able to provide the required version due to sets of replacement parts, which are supplied optionally, by installation of that replacement parts in specific order. Procedure of plansifter modification from one version to another is described in section 2.3.


Plansifter is driven by motor 1126 with power 4 kW, oscillations frequency 950 rpm.  Electric motor must be powered by three-phase AC mains with frequency 500,2 Hz, voltage 380 V. Plansifter electric scheme (fig.1.4.10) provides motor switching on and off, protection of the motor and electrical wiring against short-circuit currents, overload, rated voltage.


KM starter, which connects motor to the power network with its contacts, is self-locking and triggers by pushing the button B2. Stop the electric motor by pushing the button S .1.


Operational principle of plansifter lies in the parallel and consequent product sifting through plane horizontal sieves, which perform circular translation.


Stock product from receiving boxes is transferred to feeders and distributed into three flows to the body sieve frames that provide sorting process.


Product movement inside the section is occurred in accordance with one of the process flow diagrams. Product fractions are removed from the body through outlet nozzles, transferred to floor nozzles and further to gravity flow ducts.


Product use


During plansifter operation process special attention should be payed to the following factors:


- ensuring continuous product supply to the plansifter sections;


- ensuring reliable removal of products from the plansifter;


- tightness of the body to prevent dusting in junctions;


- contamination of one fraction to another;


- state of all oscillating units and details, quit operation;


- cleaning of sieves, checking the efficiency of cleaners during separator stops;


- aspiration efficiency (for flour mills with mechanical transport).


Start and stop of the plansifter must be carried out without load.


Efficiency of separation processes and extraction coefficient of fractions that passed through screen depends on initial product qualities, load and plansifter kinematic parameters frequency and body oscillations radius. Setting an optimal kinematic mode of the plansifter should be aimed to succeed the best technological effect. It is necessary to take into account that sieving of ground material from 1st-2nd breaks (coarse and small) requires maximal body oscillations radius, while for 3rd-9th breaks and flour control smaller one. Other systems (breaks) require body oscillations radius with average value. Radius of uniform circular translational oscillations trajectory in horizontal plane of plansifter body is adjusted by removable loads fixed on the balancer. Dependence between body circular oscillations radius and removable loads weight is shown on fig.2.3.


During removable loads installation their weight and configuration on upper and lower balancers must be equal. In case of failure to do so, loads in bearing blocks are unfavorably distributed that breaks body horizontal movement and deteriorates effect of product separation.


Body oscillations radius is determined as follows: fix clean paper sheet on the free area of the body roof, after reaching a steady state (after 10-20 minutes) touch the sheet with a sharped pencil, which must be fixed in special holder or holding it motionless in an outstretched hand. Pencil leaves a trace on the paper the trajectory of the plansifter oscillation, which is close to the circle. Time of contact between pencil and paper must correspond to one or two circles. Measure the largest D1 and the smallest D2 distance between two diametrically opposite points of the circle and determine the average radius R by the following formula:


R = (D1+D2)/4


If it is necessary to reequip one or more sections from one functional scheme to another, customer can optionally receive necessary sets of replacement parts and, by its own resources and means, change plansifter to the desired version.


Appointment of replacement parts group sets:


Set 1 for modification of section scheme 1 to scheme 2;

Set 2 for modification of section scheme 1 to scheme 3;

Set 3 for modification of section scheme 2 to scheme 1;

Set 4 for modification of section scheme 2 to scheme 3;

Set 5 for modification of section scheme 3 to scheme 1;

Set 6 for modification of section scheme 3 to scheme 2.


Each set contains replacement parts for one plansifter section.

List of replacement parts group sets is specified in appendix.


Readjustment of the plansifter sections from one functional scheme to another should be carried out in the following sequence:


- remove corresponding bypass boxes or sheets with windows in door and cabinet sections, unscrew the fixing screws and replace them by necessary boxes and sheets with windows from the set of replacement parts. While replacing boxes and sheets, it is necessary to check carefully the absence of gaps in the joints of neighboring elements and, if necessary, eliminate them by sticking the gaskets;


- unscrew the nuts and remove guides, which must be replaced, remove or reinstall intermediate bottoms. Intermediate bottoms are fixed on the wooden supporting planks of section pillars by brackets. They also might be fixed by nails;


- to change movement direction of fractions that passed through sieve from single-sided trays of sieve frames it is necessary to remove the tray with frame and turn it to 180˚.

 

Attention!!! Tightening of nuts, mounting of roof and bottom to the panels and balancer frame, mounting of the bearings housings =10010 N.m. and periodicity of checking the bolts tightening every 10 days. Plansifter rotation when viewed from above only in clockwise direction.