Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
  • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
  • B02C18/10—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged above container

Definitions

• the present specification refers to a mill for feed and food products, of the type that comprises a structural housing in the form of a hopper.
• the aforementioned hopper is closed by a lid, in which there is a screening sieve inside, which in conjunction with this defines a flat cylindrical volume, inside which one or more hammer rotors or fixed blades that rotate are housed. mounted on a vertical axis supported by bearings and which receives the movement of a motor placed on the upper part of the cover.
• On the upper part of this casing there are one or more feeding hoppers provided with an adjustable closure and equipped with forced feeding devices (screw-auger, conveyor belt, vibrator, etc ...) regulated by an electronic variator, which allow the controlled feeding of the mill.
• the product is introduced through these hoppers into the screen, where it is repeatedly struck by the hammers or blades and against the screen itself, until it is reduced to a sufficient extent to pass through the holes in the screen.
• the primary objective of the present invention is to provide a mill that can grind any type of brittle products, even from the two groups mentioned above, incorporating for it the improvements object of the present invention with the help of the following description made on the basis of to a practical example of realization, which has been presented in the attached plans, in which:
• Figure 1 shows a schematic elevation view, diametrically sectioned, of a mill that includes the improvements introduced here.
• the mill is structured by one or more vertical axes (1) that include one or more hammer rotors (2) inserted inside a circular screen (3), the product receiving superiorly from one or more hoppers (4).
• the path that the product travels before entering the grinding chamber begins in the magnetic separator (5) where the product, when passing through it, is free of ferrous-type metallic impurities, subsequently and by means of Inclined ducts the product to be milled accesses the forced feeding system (6), which, automatically and controlled, transports it to the input hoppers (4).
• the product is hit by hammers or blades (7), throwing it strongly against the locks (10) and walls of the screen (3) until the particle size achieved by the particles is less than the holes of the same and allow the passage of the crushed product to the receiving hopper (8) that defines the mill's own casing.
• the rotor (2) In order to achieve a correct distribution of the product in the grinding chamber, the rotor (2) has been fitted in its upper part with fixed blades (9) placed radially that, at the same time that they uniformly distribute the product, act as hammers making a primary break of it.
• the rotor (2) In order to optimize the grinding action and to avoid that the product rotates by sliding through the inner periphery of the screen (3) as a consequence of the rotational inertia of the rotor (2) and the produced centripetal force, they are arranged in the inside periphery of the screen some metal locks (10) that bounce the product again against the hammers or blades (7) increasing the energy efficiency of the mill.
• a set of scraper blades are arranged radially and at the bottom of the rotor (2) that throw the product out of the screen (3) thus maintaining a maximum grinding surface and preventing jams in the mill.
• a support structure (11) has been arranged that allows a vertical movement of the screen parallel to the axis of the mill by means of pneumatic cylinders (12). This facilitates the assembly and disassembly of screens for cleaning or inspection without making it tiresome for the user.
• This anchoring system is equipped with a safety pressure switch that automatically stops the operation of the mill when it detects a lack of pressure in the cylinders in order to avoid mishaps due to the movement of the screen (3).
• the casing in the upper area corresponding to the support-cover (13), has a partition ( 14) on all the sides or at least on some of them, which defines between it and the housing a chamber whose entrance is defined by a small lower entrance.
• This chamber is accessed through a tube (15) connected to a centrifugal extractor (16) and to a settling cyclone (17).
• the extractor generically referenced as (16) in the figure, sucks the existing gas inside the mill without dragging more than a tiny amount of crushed product particles. These particles fall from the extractor (16) and from the decanter clone (17) by means of two alveolar valves (18) to a conveyor (19) that evacuates the ground product from the hopper.
• This hot air evacuation system is regulated and commanded by a thermostat that, when detecting a previously programmed temperature and considered critical, starts the system.
• a thermostat that, when detecting a previously programmed temperature and considered critical, starts the system.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Crushing And Pulverization Processes (AREA)
• Crushing And Grinding (AREA)
• Disintegrating Or Milling (AREA)
• Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
• Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8268284

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (2)

Citations (6)

• 1990
  • 1990-07-24 ES ES9001990A patent/ES2025898A6/es not_active Expired - Fee Related
  • 1990-08-31 CZ CS904251A patent/CZ279261B6/cs unknown
• 1992
  • 1992-01-22 WO PCT/ES1992/000009 patent/WO1993014873A1/es active Application Filing

Patent Citations (6)

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