Comminutor for comminuting bulk material, and method therefor

Abstract

The invention relates to a comminutor for comminuting bulk material, and a trailer and method therefor. The comminutor includes a frame provided with an opening; a rotatable drum which is arranged on the frame and on which blades are provided; counter-blades which are connected to the frame and which operate with the blades for the purpose of comminuting material carried into the opening; a screen positioned on the underside of the drum; and an access door connected to the frame and provided with a tilting mechanism such that easy access to the screen is obtainable by opening the door.

Claims

1. A comminutor for comminuting bulk material, comprising: a frame provided with an opening; a rotatable drum which is arranged on the frame and on which blades are provided; counter-blades which are connected to the frame and which operate with the blades for the purpose of comminuting material carried into the opening; a screen positioned on an underside of the rotatable drum; and an access door connected to the frame and provided with a tilting mechanism such that easy access to the screen is obtainable by opening, the door, wherein the door is provided with an adjusting mechanism for adjusting the distance between the blades and the counter-blades.

2. The comminutor of claim 1, wherein the tilting mechanism is embodied such that in the opened position substantially the whole door is situated outside the frame.

3. The comminutor of claim 1, wherein the tilting mechanism is provided with a carrier for lifting and co-displacing the door on the underside of the rotatable drum as defined in the opened position of the door.

4. The comminutor of claim 3, wherein the tilting mechanism is further provided with a safety element for holding in the opened position the underside of the door co-displaced by the carrier.

5. The comminutor of claim 3, wherein the frame is further provided with a screen support part which is provided in at least partially outward slidable manner by the tilting mechanism during opening of the door.

6. The comminutor of claim 1, wherein the adjusting mechanism comprises a blocking means for fixing the door relative to the frame during use.

7. The comminutor of claim 1, wherein the drum is provided with an internal bearing-mounting.

8. A comminutor for comminuting bulk material, comprising: a frame provided with an opening; an access door connected to the frame, provided with a tilting mechanism such that easy access to the screen is obtainable by opening the door; a rotatable drum which is arranged on the frame and on which blades are provided; counter-blades provided on the door, and which are connected to the frame, and which operate with the blades for the purpose of comminuting material carried into the opening; and a screen positioned on the underside of the rotatable drum, wherein the access door is provided with an adjusting mechanism for adjusting the distance between the blades and the counter-blades.

9. The comminutor of claim 8, wherein the adjusting mechanism comprises a blocking means for fixing the door relative to the frame during use.

10. A trailer provided with a comminutor as claimed in claim 1.

11. A method for comminuting bulk material, comprising the steps of: providing a comminutor as claimed in claim 1; carrying material for comminuting into the opening; comminuting the material; and discharging the comminuted material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a view of a comminutor according to the invention positioned on a trailer;

(2) FIG. 2 shows a view of the comminutor of FIG. 1 with an opened door;

(3) FIGS. 3 and 4 show further views of a comminutor of FIG. 2;

(4) FIG. 5-7 show views of the opening of the door;

(5) FIG. 8-10 show views of components of the comminutor of FIG. 2; and

(6) FIG. 11 shows a view of the drum of the comminutor according to FIG. 2.

DETAILED DESCRIPTION OF CERTAIN PREFERRED EMBODIMENTS

(7) A trailer 2 (FIG. 1) is provided with a comminutor or shredder 4. Comminutor 4 is driven with a separate drive 6, in the shown embodiment comprising a diesel engine. Wagon or trailer 2 is placed during use on ground surface 12 using wheels 8 and supports 10.

(8) Comminutor 4 (FIG. 2) is provided with container or frame 14 which in the shown embodiment can be placed on frame 16 of wagon 2. Provided on the upper side of frame 14 is opening 18 in which a number of inclining feed plates 19 are arranged. Material for comminuting can hereby be fed into the space bounded by frame or container 14 of comminutor 4. Provided in the interior of comminutor 4 is a drum 20 on which a number of blades 22 are arranged. Drum 20 is a rotatable drum. A hatch or door 24 is provided on a side of comminutor 4. In the shown embodiment a number of modular counter-blades 26 are arranged on door 24.

(9) Drum 20 (FIGS. 3 and 4) rotates during use about central axis 28. Blades 22 rotate during use through recesses between adjacent counter-blades 26 so as to thereby bring about the actual comminution of the material. The type of blade 22 and counter-blade 26 can be adapted to the type of material for comminuting and the desired comminution size. On the underside of drum 20 a curved support part 30 is provided on the side walls of comminutor 4 during use. Also provided is a screen support part 32 on which a screen 34 can be placed. Screen support part 32 rests during use on shaft 36 and pin 38. In closed position door 24 likewise rests on shaft 36. Movement of door 24 is realized using a tilting mechanism 39 that includes a cylinder 40, which is mounted at a first mounting point 42, and a cylinder rod 44 on shaft 46. A first arm 48 is also provided between pivot point 50 and shaft 46. Shaft 46 is connected using a second arm 52 to hinge 54 on door 24. Door 24 is provided on the upper side with an adjustment mechanism 55 that includes a slotted hole 56 and a blocking catch 58 that fixes the door in closed position by engaging one of the apertures 57 formed in a plate 59 positioned in door 24. The distance between blades 26 and blades 22 is hereby set and maintained during use.

(10) When door 24 is opened (FIG. 5-7) cylinder 40 slides out, whereby cylinder 40 and arm 48 rotate around respective pivot points 42 and 50. In the shown embodiment door 24 will in the first instance rotate about shaft 36 using the half hinge-like element 60. The door moves here from the closed position of FIG. 5 to an intermediate position as in FIG. 6. With further inward sliding of cylinder 40 the carrier or carrier hook 62 provided on arm 48 co-displaces pin 64 provided on the underside of door 24 during the tilting movement so that door 24 is pulled outward and lies substantially outside the frame of comminutor 4 in the opened position (FIG. 7). During this combined tilting and sliding movement of door 24, in the shown embodiment screen support part 32 is pulled outward together with support 34, wherein screen support part 32 no longer rests on pin or shaft 68 with support part 66, but instead with outer end 70. Further provided on a comminutor 4 is safety element or safety hook 72 with which pin or shaft 64 is held in place and cannot therefore simply fall out of comminutor 4 in the opened position.

(11) Screen 74 (FIG. 8) is placed on the side of drum 20 facing downward during use. The positioning of blades 22 is adapted to the material for comminuting (FIG. 8 and FIG. 9). Drum 20 is provided in the shown embodiment with a number of supports 76 on which blades 22 are provided. A flange 78 is provided on the outer ends of drum 20.

(12) Counter-blades 26 are provided in modular manner in recesses 80 arranged in door 24. Counter-blades 26 are hereby easily replaceable.

(13) Drum 20 with flanges 78 is driven from outside using a drive 82. Provided on the inner side of drum 20 is bearing-mounting 84 comprising a flange 86, which is fixedly connected to the inner side of drum 20, and a carrier gear 88. The length of drum 20 between the two support points with flanges 86 is in this way reduced, whereby less outward bending will occur in the case of similar forces.

(14) During use of comminutor 4, material for comminuting is introduced into opening 18, for instance using a crane. Owing to the rotating movement of drum 20, on which blades 22 are arranged, the material for comminuting is shredded between blades 22 and blades 26, which in the shown embodiment are mounted on door 24. On the underside of comminutor 4 the comminuted material is carried over screen 74 with a determined screen size. Screen 74 determines which size of the comminuted material can leave comminutor 4. This material is then discharged. In order to gain access to the interior of comminutor 4, door 24 is opened using cylinder 40. Undesired parts can hereby be removed from screen 74 and/or components, including screen 74 itself, can be replaced in relatively simple manner.

(15) The present invention is by no means limited to the above described preferred embodiments thereof. The rights sought are defined by the following claims, within the scope of which many modifications can be envisaged.