JP3720870B2 - Batch mixer - Google Patents

Abstract

The fixed drum (1) contains a rotor (6) fitted with mixing arms (7) and paddles (8), and empties at the base through double doors (10,11). The drum and corresp. drives are fastened to an under body structure (2) immediately below. The opening angle of the doors is smaller than the angle of slope of the charge; they are secured when closed, by the central bar catch (15). They (10,11) swing up on symmetrically disposed bearings (12,13), making a horizontal tangent with the base of the drum. <IMAGE>

Description

[0001]
[Industrial application fields]
The present invention relates to a mixing container connected to a bottom structure for discharging by a swinging door having a divided bottom, a mixing rotor having a mixing arm and a paddle provided therein, and a driving device for the mixing rotor And a batch mixer for mixing feed, flour, and the like.
[0002]
[Conventional technology and problems]
Batch mixers used to mix hard or plastic flowable materials or bulks are generally considered known. U.S. Pat. No. 4,043,540 discloses a tiltable paddle mixer with a helical mixing blade rotating in a trough, and a similar structure is disclosed in U.S. Pat. No. 4,509,860. And U.S. Pat. No. 3,273,863.
[0003]
East German States feed mixing stirring device according to Patent No. 262,961 is a mixing drum having a stirring blade disposed horizontally, this stirring wing, straight agitating arm segment is provided upright, the The stirring arm segment has a mixing bar at its end. A plate-like auxiliary mixing blade is detachably fixed at the center between the segments.
[0004]
A mixing device with a cylindrical mixing vessel is known from Swiss Patent 648767. In this mixing vessel, a rotatable mixing shaft is arranged substantially horizontally in the longitudinal axis direction, and a group of mixing arms provided with a mixing plate is fixed thereto. The direction of action of these mixing plates is opposite for each group.
[0005]
In such a conventional technique, the ratio between the diameter and the length of the mixing container is significantly different from unity. It is also known to expedite material from this type of mixer by a swinging door provided at the bottom. Such a bottom swing door can be provided over the entire length of the mixer and is equipped with an automatic locking operating mechanism (to prevent it from opening alone).
[0006]
In order to minimize the residual amount when discharging the feed mixture, it has already been proposed to divide the discharge swing door (bottom swing door). In this case, since the tangential angle must be larger than the repose angle, a large swing door is required. Furthermore, it requires air purification and costly surface treatment inside the mixer.
[0007]
Furthermore, European Patent No. 142003 discloses a concrete mixer having a swing door divided at the bottom, but the operation mechanism of this double swing door is complicated, and Since the rotation fulcrum is placed at a high position, the size of the swing door is increased accordingly, and therefore the adjustment of the pressing force requires an expensive steel plate backing.
[0008]
[Problems to be solved by the invention]
The object of the present invention is to provide a quick mixer for feeds, etc., which does not require the aforementioned drawbacks of the prior art, and does not require exhaust or air circulation and can quickly carry out (hygienic) discharge without residue. Is to provide.
[0009]
[Means for Solving the Problems]
This object is achieved according to the invention in that the ratio between the length and the diameter of the mixing vessel is less than 1 and that the swing door is arranged in the bottom group just below the mixing vessel, The swinging door is open and the opening angle of the swinging door is smaller than the repose angle of the material to be mixed, and the swinging door is held closed by a locking device that acts on the center of the swinging door. This is achieved by the fact that the swinging door protrudes from the side wall of the mixing container, and the opening of the swinging door is not provided with a bar that obstructs the flow of the contents.
[0010]
Advantageous embodiments of the invention are described in the dependent claims.
[0011]
【Example】
Next, an embodiment of the batch type mixer of the present invention will be described in detail with reference to the drawings. Here, FIG. 1 is a front view of the batch type mixer, FIG. 2 is a side view thereof, and FIG. 3 is a detailed view of the mechanism of the swing door.
[0012]
The main parts constituting the batch mixer are a mixing vessel 1, a bottom structure 2, and a drive unit 3 equipped with a suitable control unit. Since the mixing container 1 and the bottom structure 2 are simply connected by bolts, inspection and cleaning are very easy. The mixing vessel 1 can be made of either stainless steel or plain steel. The inner surface of the mixing container 1 is smooth and there are no reinforcements or other protrusions on the inside. On the side, there is a swinging door 4 for inspection and an inlet for material to be mixed on the top. All seams are provided outside the mixing vessel 1.
[0013]
The ratio between the length and the diameter of the mixing container 1 is close to 1 (it can be further reduced).
A mixing rotor 6 is supported in the mixing container 1 and is driven by a driving device 3. A plurality of mixing arms 7 each having a known paddle 8 are fixed to the mixing rotor 6. The mixing arm 7 is shrink-fitted to the clamp member 9, and the clamp member 9 is fixed to the mixing rotor 6 by a tightening joint.
[0014]
In the range of the bottom of the mixing container 1, the swing doors 10 and 11 are arranged as a part of the bottom structure 2 so as to be swingable around the bearings 12 and 13, respectively. This range of the mixing container 1 is open. The opening of the swing door reaches from one side wall of the container to the other side wall, and there are no bars or the like that obstruct the flow of the product at the end or the center of the opening.
[0015]
A locking device 15 having a pressing roller 16 is disposed in the center between the swing doors 10 and 11 so as to be swingable about a shaft 14. Both swing doors 10 and 11 are provided with seals over the entire length in the overlapping range 17.
[0016]
Sealing tube 18 inflatable is sealed opposite edge of the swinging door, respectively.
The swing doors 10 and 11 are operated by a fluid auxiliary drive device (not shown).
[0017]
The pressing force of the locking device acts on the center of the swing door and is controlled with a time delay by an electromagnetic valve.
The pressing force is adjusted by a slit.
[0018]
The swing doors 10 and 11 protrude from the side wall of the mixing container in the longitudinal direction (hygienic).
The thin plate 19 closes the space between the mixing container 1 and the bottom structure 2, and at the same time serves as a cable passage or the like. The material to be mixed is sent from the inlet 5 to the mixing container 1 and mixed. When the mixing rotor 6 is stopped, the swinging door 10 is opened first and then the swinging door 11 is opened by the swinging of the locking device 15 (before that, the air in the sealing air tube 18 is removed). The open position of the swing doors 10, 11 resembling valves (open angle less than the rest angle, i.e., less than the static angle) allows controlled discharge of the mixing vessel 1 and thus illustrates special means such as exhaust or air circulation. It is not necessary to install it in the receiving passage for unused products. When the swing doors 10 and 11 are closed, the swing door 11 and then the swing door 10 are first swung to the closed position, and then the locking device 15 is swung so that the pressing roller 16 is swung. , 11 is pressed against the overlapping area, and this is securely closed.
[0019]
【The invention's effect】
With the configuration as described in detail above, the batch mixer of the present invention has a simple structure that does not require exhaust or air circulation, and is free from the disadvantages of conventional mixers and has no residue (hygienic). There is an advantage that the discharge can be carried out quickly.
[Brief description of the drawings]
FIG. 1 is a front view of a batch mixer.
FIG. 2 is a side view of a batch mixer.
FIG. 3 is a detailed view of a swing door of a batch type mixer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mixing container 2 Bottom structure 3 Drive part 4 Inspection rocking door 5 Input port 6 Mixing rotor 7 Mixing arm 8 Paddle 9 Clamp member 10 Swing door 11 Swing door 12 Bearing 13 Bearing 14 Shaft 15 Locking device 16 Pushing Roller 17 Overlap range 18 Sealing tube 19 Thin plate

Claims (5)

A mixing rotor housed in a mixing container and a driving device for the mixing rotor, the mixing rotor including a mixing arm and a paddle, and through a swinging door in the form of a bottom swinging door into which the mixing container is divided. In a batch mixer for mixing feed, flour, etc., whose contents are discharged and connected to the bottom group,
The ratio between the length and the diameter of the mixing vessel is less than 1 and the swing doors (10, 11) are arranged in the bottom group (2) just below the mixing vessel (1), and the mixing vessel (1) Is open in the range of the swing door (10, 11), and the opening angle of the swing door (10, 11) is smaller than the repose angle of the material to be mixed, and the swing door ( 10, 11) is held closed by a locking device (15) acting at the center thereof, the swing door (10, 11) projects from the side wall of the mixing container (1), and the opening of the swing door is A batch-type mixer characterized by not having a cross bar that obstructs flow.   The swing doors (10, 11) are arranged swingably on the bearings (12, 13) symmetrically with respect to the center at the height of a horizontal tangent to the mixing container (1). Item 1. The batch mixer according to item 1.   The batch mixer according to claim 1 or 2, characterized in that the inner wall of the mixing vessel (1) is smooth and the fixed parts or seams are arranged on the outer wall.   The mixing container (1) and the bottom structure (2) are connected to each other by a bolt joint so that they can be quickly separated, and the drive unit with a control device can also be quickly separated in the same manner. The batch mixer according to claim 1, wherein the batch mixer is disposed on a side surface of the batch type.   The mixing arm (7) is fixed to the mixing rotor (6) by a tightening joint, and the mixing arm (7) itself is firmly arranged on the clamp member (9) by press fitting. Item 1. The batch mixer according to item 1.

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