WO2020068021A2

WO2020068021A2 - Roller mill with load cell doing homogeneous product feeding

Info

Publication number: WO2020068021A2
Application number: PCT/TR2019/050791
Authority: WO
Inventors: İsmail ALAPALA
Original assignee: Alapala Maki̇na Gida Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
Priority date: 2018-09-27
Filing date: 2019-09-25
Publication date: 2020-04-02
Also published as: WO2020068021A3; TR201814103A2

Abstract

The invention is related to a roller mill (1) which has a product inlet hopper (40) from which the cereals subject to grinding are fed to the system; a product storage section (42) in which the cereals in the interior section of said product inlet hopper (40) are stored and transfers the products into the grinding section; a control panel (30) which controls the operation of the system with instant data; a main body (10) which embodies all units thereon; a load cell (20) which is positioned on the upper portion of the product inlet hopper (40) and enables the feeding mechanism to operate with required speeds; a weight bar (21) which extends perpendicularly to the base of the product storage section (42) by means of connecting with the bottom portion of the Load cell (20) and weighs the products (cereals) present herein.

Description

DESCRIPTION

ROLLER MILL WITH LOAD CELL DOING HOMOGENEOUS PRODUCT FEEDING Technical Field

The invention is related to roller mills which are used during the grinding process of the cereals.

The invention is particularly related to a roller mill which weighs the weight of the cereals within the product storage area and adjusts the machine operation speed according to this weight.

State of the Art

Today more than 60% of daily nutrition of people consists of cereals and foods produced from cereals. Most of these foods consist of products such as bread, pasta, biscuit etc. which are obtained from mixing the cereals that are in flour form and various substances.

The process of crushing the grains into flour is called grinding. Grinding of grains is a process used since very ancient years. The stone mills used in the grain grinding process since ancient ages are still used today. However, too much labor force and time is required for grinding process in stone mills. For this reason particularly grinding (roller) machines are used in the industry productions wherein grains are used as an intermediate food in flour form. The roller mills comprise units which provide grinding the products.

In the prior art, the product which reaches the product inlet section enters through the middle central portion so that a product accumulation with a reverse“V” form occurs, thus a precise measurement cannot be made.

In the present state of the art, since precise measurement cannot be performed, it is not possible to measure the increase in the level of the product in a stable manner. The data sent to the invertor (speed control signal sent to the distributer balls) may not be reliable. This situation may lead to decrease in productivity.

In the present state of the art since the product sent by the machine which enables feeding on the roller cannot be measured properly, it may lead to the blockage of the system.

In the present state of the art, the fill rate of the feeding inlet hopper is adjusted by means of the volumetric measurement method using level sensors. However in this application; effective and proper operation of the feeding system cannot be enables by means of performing false measurement as a result of the bonding due to static electric and moisture of the product. As a result of the researches made in the literature, various configurations can be found in relation with said roller mills. One of these is the utility model No TR2013/13610 titled as “Novelty in the Roller Mill”. In the abstract of the invention with classification No B02C 1/00 the following statement takes place; “The invention is related to a roller mill characterized in comprising the following; main body, 1 ^st feeding roller, 2^nd feeding roller, 3^rd feeding roller, 4^th feeding roller, 3^rd feeding roller palettes and 3rd feeding roller fragmentation pins located on said 3^rd feeding roller, 4^th feeding roller palettes and 4^th feeding roller fragmentation pins located on said 4^th feeding roller, roller which allow rotation of the 3^rd feeding roller and 4^th feeding roller, roller bearings which bear said rollers, drive gears which transfers the motion taken from said 2^nd grain roller to said 3^rd grain roller and belt.”. The relevant development is made in the invention in terms of the rollers which perform the grinding process. However an improvement is not made in terms of pouring the cereals to the rollers.

Another example in relation to said configuration is the utility model with application No TR2014/02752 titled as“The roller mill.” In the abstract of the invention with classification No B02C 2/00, the following statement takes place;“This invention is related to a roller mill to be used in the grinding process of the cereals, which has a distributor unit that can operate independently from the grinding unit by means of the reducer which is in connection with the perpendicular piston”. There is not such an assembly in the invention which enables advancing the products to the grinding rollers in a proper manner.

Another example in relation to said configuration is the utility model with application No TR2012/10874 titled as“Improvement in the roller cereal crushing machine.” In the abstract of the invention with classification No B02C 4/00, the following statement takes place;“This invention is related to flow adjusting rollers which enables proper and equal amount of product feed to the crushing rollers which realizes cereal grinding/crushing processes in the roller cereal crushing machines which realizes the grinding process of the cereal products such as wheat, corn, barley etc. with predetermined sizes by crushing and grinding in an automatic manner. (Figure 1 )”. In this invention, in order to feed the cereals to the rollers (main rolls) in a proper manner, an adjusting roller is placed on the new inlet section. This cannot be able to send product in a balanced manner to the grinding rollers according to the product density in the inlet chamber.

In the above mentioned applications, in order to properly advance the products to be grinded within the grinding rollers, there is no such a productive assembly. Therefore, these applications can be referred as examples to some abovementioned disadvantages. As a result, roller mill machines are developing in parallel with the developing technology, due to the abovementioned disadvantages and insufficiency of the current solutions about the subject matter, an improvement is required to be made in the relevant technical field.

Aim of the Invention

Different from the configurations used in the present state of the art, the invention is related to a roller mill which is developed for solving said disadvantages and brings some additional advantages.

The aim of the invention is to solve the problems in the roller mills operated by speed control system by means of the measurement system based on gravimetric in other words weight. In order to solve this, a weighing system with load cell is used. In this system a measurement based on gravimetric in other words weight instead of the volumetric measurement within the current system.

Another aim of the invention is to provide the system operating in the most effective and proper manner by means of measuring the weight of the product coming through the feeding chamber and sending signal to the motor which drives the feeding system by the help of the inverter.

Another aim of the invention is to guarantee the product to be at the same level within the feeding chamber in a continuous manner.

Another aim of the invention is to eliminate the reading mistakes caused by the irregular accumulation realized in the reverse“V” form, since the product coming to the product inlet portion is measured according to weight rather than the level.

Another aim of the invention is to send correct data/signal to the feeding balls since a weight focused precise measurement can be made. Therefore feeding balls can be able to rotate at appropriate speeds and can be able to send required amount of product to the cutting-crushing balls, thus sensitivity of homogenous and continuous product feeding would be increased.

Another aim of the invention is to eliminate the blockage in the feeding chamber by means of weighing the product in a precise manner which feeds the main rolls by the load cell.

In order to fulfill the above mentioned aims; a roller mill which performs a productive grinding process by means of operating the feeding mechanism at suitable speeds by means of weighing the amount of cereals within the product inlet hopper where the cereals to be grinded are fed to the system. There is a product inlet port which is positioned on the upper portion of said product inlet hopper and in which the cereals are dropped. In the interior section of said product inlet hopper, a product storage section is formed where the cereals dropped through the product inlet port are stored and the products are transferred to the grinding section. The instant operation of the system is enabled by the control panel. All elements are placed on the main body.

Said roller mill has a Load cell which is positioned on the upper portion of the product inlet hopper and enables transfer of the cereals to the grinding section by means of interpreting and transmitting the weighing data to the control panel and enables the feeding mechanism to operate with required speeds.

The roller mill also comprises weight bar which extends perpendicularly to the base of the product storage section by means of connecting with the bottom portion of the Load cell and weighs the products (cereals) present herein.

The structural and characteristic features of the present invention will be understood clearly by the following drawings and the detailed description made with reference to these drawings and therefore the evaluation shall be made by taking these figures and the detailed description into consideration. Brief Description of Figures that Clarify the Invention

Figure -1 , is a general perspective view of the roller mill.

Figure - 2; is a detailed perspective view of the product inlet section of the roller mill and the load cells placed thereon.

Figure- 3; is a perspective view of the general structure of the inventive load cell.

Figure - 4; is a two dimensioned side view of the load cell of the invention in a manner such that it is attached to the product inlet section.

Reference Numbers

1. Roller mill 40. Product inlet hopper 10. Main body 41. Product inlet port

20. Load cell 42. Product storage section

21. Weight bar 50. PLC protection section

22. Conical base 60. Main roll housing 30. Control panel 70. Fine adjustment arm

Detailed Description of an Embodiment of the Invention Structure principle;

Said roller mill (1 ) comprises the following; a main body (10), a load cell (20), a control panel (30), a product inlet hopper (40), a PLC protection section (50), a main roll housing (60) and a fine adjustment arm (70). Figure 1 shows the general view of the roller mill (1 ).

The main body (10) is the unit which bears all units thereon and constitutes the general unit of the roller mill (1 ).

The load cell (20) is a unit which makes measurement by using the product weight coming from the weight bar (21 ) and operates the system according to this data.

The weight bar (21 ) is the element which calculates the total weights of the cereals by the pressure of the cereals which are dropped on the product storage section (42).

The conical base (22) is the unit in a conical form which is attached to the bottom portion of the weight bar (21 ) and perpendicular to the weight bar. The pressure applied by the cereal placed into the product storage section (42) is transmitted by the Load cell (20). Figure 3 is the perspective view of the Load cell (20) configuration.

The control panel (30) is used in controlling the operation of the signal instantly.

The product inlet hopper (40) is the chamber where the cereal to be processed is introduced into the machine.

The product inlet port (41 ) is the gap which is formed on the upper portion of the product inlet hopper (40) and where the cereals are dropped into the product storage section (42).

The product storage section (42) is the portion which is formed in the inner section of the product inlet hopper (40) and from which the cereals to be grinded is fed to the machine. Figure 2 shows the configuration of the product inlet hopper (40) in a detailed manner.

PLC protection section (50) is the section where automation, electronic card and system devices are located.

The main roll housing (60) is the cover where the main rolls performing the grinding process are kept.

The fine adjustment arm (70) is used as an assembly for adjusting the distance between the main rolls.

Assembly principle;

The product inlet hopper (40) wherein the inventive load cell (20) is placed is located on the upper portion of the main body (10). Under this section, there are main rolls which grind the cereals and this section is protected by means of the main roll housing (60) shown in Figure 1 .

Two weight bars (21 ) are placed in the interior section of the product inlet hopper (40) in a manner such that they are in a mutual condition. There is a conical base (22) at the bottom end portions of the weight bars (21 ). The weight bars (21 ) are engaged with the Load cell (20). The Load cell (20) is positioned in a manner such that it remains on the upper portion of the product inlet hopper (40). Figure 4 shows two dimensioned side view of the configuration within the product inlet hopper (40) of the Load cell (20).

Operation principle;

When the cereal is filled in the product storage section (42), the pressure applied on the conical base (22) and the weight bar (21 ) is measured by means of the Load cell (20) and the amount within the product storage section (42) is determined.

Data flow is enabled to the feeding mechanism which allows the passage of cereals to the main rolls through the product storage section (42) according to the amount of cereal inside. The faster and slower operation of the feeding mechanism is enabled according to this data by the help of the inverter. Therefore a productive grinding process is performed when the cereals fall onto the main rolls in a homogenous and properly distributed manner.

Claims

1. A roller mill (1 ) which comprises a product inlet hopper (40) from which the cereals subject to grinding are fed to the system; a product inlet port (41 ) which is formed on the upper portion of said product inlet hopper (40) and into which the cereals are dropped; a product storage section (42) which is positioned in the interior section of said product inlet hopper (40) and in which the cereals dropped from the product inlet port (41 ) are stored, transfers the products in the grinding section; a control panel (30) which controls the operation of the system with instant data; a main body (10) which embodies all units thereon, characterized by comprising;

• A load cell (20) which is positioned on the upper portion of the product inlet hopper (40) and enables transfer of the cereals to the grinding section by means of interpreting and transmitting the weighing data to the control panel (30) and enables the feeding mechanism to operate with required speeds,

• A weight bar (21 ) which extends perpendicularly to the base of the product storage section (42) by means of connecting with the bottom portion of the Load cell (20) and weighs the products (cereals) present herein.

2. A roller mill (1 ) according to claim 1 , characterized by comprising; a conical base (22) which is secured to the bottom portion of the weight bar (21 ) in a perpendicular manner to the weight bar (21 ), evokes the Load cell in terms of the pressure formed due to its loading on the products in the product storage section by means of the weight bar (21 ) and thus enables the most accurate weight data to be read.