Mixing device

Abstract

To provide an agitation device where a mixing degree of a treatment object and an additive is improved.SOLUTION: In an agitation device,: a rotor 3 where a plurality of agitation claws 13 is spirally arranged on an outer periphery of a rotary shaft 7 and projected is fixed to the rotary shaft in a cylindrical drum case 2 and a treatment object thrown from one end side of the drum case 2 while rotating the rotor 3 is agitated and discharged to the other end side; a nozzle 19 to jet an additive toward a rotation direction of a rotation locus L of the rotor 3 is installed at a peripheral wall of the drum case 2; a whole body of the drum case 2 is formed to have a U-shaped cross section; a lid 14 to close an open end is mounted; and the nozzle 19 to jet the additive along a scraping direction is installed downward via an agitation space 17 formed at an inner surface corner part between the lid 14 and the side walls 2a, 2b.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an agitation device for agitating and mixing powders and granular materials, and for crushing and mixing earth lumps and mineral lumps. [Background technology]

[0002] Conventionally, known agitation devices of the above type include those disclosed in Patent Documents 1 and 2, which have a rotor with a number of agitation claws arranged spirally on the outer periphery of a rotating shaft, supported inside a cylindrical drum case, and which agitate, crush, and mix the material fed into one end of the drum case while sending it out the other end.

[0003] The various materials to be stirred as described above are often subjected to preliminary treatments, such as for efficient mixing or pulverization in a short time, or for mechanical, physical, or chemical modification of the properties of the materials to be processed in the next step of processing or treatment, depending on the type and purpose of the materials to be processed.

[0004] Therefore, when adding powders, granules, gases, liquids, or mixtures of these prior to processing using these agitators, they have either been added before the agitation process or supplied by throwing, pouring, scattering, spraying, etc. into the drum case during agitation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6889924 [Patent Document 2] Patent No. 6156803 Summary of the Invention [Problem to be solved by the invention]

[0006] However, even when the above-mentioned method is used in the drum case, there are problems such as insufficient or uneven mixing, and in order to improve these problems, it is necessary to ensure that the material to be treated has a sufficient residence time in the drum case. [Means for solving the problem]

[0007] The agitation device of the present invention for solving the above problems is, first, an agitation device in which a rotor 3 having a number of agitation claws 13 arranged spirally and protruding from the outer periphery of a rotary shaft 7 is supported within a cylindrical drum case 2, and the material to be treated is fed into one end of the drum case 2 and agitated while the rotor 3 is rotated, and the material is discharged to the other end, The cross section of the lower half of the drum case 2 is formed in an arc shape following the rotation locus L of the rotor 3, and the entire case is formed in a U-shaped cross section with the upper end being an open end. A lid 14 is attached to close the open end, and agitation spaces 17 in which the material to be processed is splashed up are formed at the inner corners between the lid 14 and the front and rear side walls 2a, 2b of the drum case 2. A plurality of nozzles 19 are installed downward on the lid 14 at predetermined intervals along the axial direction of the rotor 3, for spraying additives to be added to and mixed with the material to be processed along the suction direction of the agitation claws 13 only into the agitation space 17 on the suction side of the rotation locus L of the rotor 3. It is characterized by the following.

[0008] No. 2 2, Nozzle 19 but , the injected material is in the drum case 2 The scraping side In the rotor 3, the rotor 3 is fan-shaped along the axial direction. And continuously in a straight line The nozzle creates a wide spray shape be It is characterized by the following. [Effects of the Invention]

[0009] In the device of the present invention configured as described above, additives are sprayed in the direction of rotation of the rotor (the direction of introduction), so that the additives, such as gas or liquid, or the powder or granular material sprayed together with them, are smoothly fed into the interior by the rotation of the rotor's stirring claws and efficiently mixed or come into contact with the material to be treated. This has the advantage of ensuring that mixing, crushing, physical or chemical treatment, etc., according to the treatment purpose of the material to be treated can be carried out.

[0010] The nozzle injects the additive through the agitation space in the drum case, supplying it to the material being treated as it scatters within the space, promoting mixing and contact with the material being treated.

[0011] Furthermore, by arranging multiple nozzles in a row along the axial direction of the drum case, the additives are sprayed evenly over a long range around the rotor, ensuring that the additives are supplied evenly and reliably to the material being treated, improving treatment performance.In addition, the additives are spread in a fan-like pattern along the axial direction, further improving the uniform mixing and treatment performance of the additives. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an overall front view of a stirring device of the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is an overall plan view of the stirring device. [Figure 4] (A) and (B) show the front and right side cross-sectional views of the rotor and drum case, respectively. DETAILED DESCRIPTION OF THE INVENTION

[0013] 1 to 4 show one embodiment of the device of the present invention, in which a cylindrical drum case 2 is installed in the longitudinal (left-right) direction on a mounting frame 1 that serves as a base, and a rotor 3 is housed inside the drum case 2 along the longitudinal direction, with the left and right ends rotatably supported by bearings 4, 6. In this example, the rotor 3 rotates counterclockwise when viewed from the right side.

[0014] A motor 9 is attached to the left end of the mounting frame 1 and is connected to the rotary shaft 7 of the rotor 3 via a clutch (or coupling) 8, and this motor 9 drives the rotation of the rotor 3. An inlet 11 with a hopper for the material to be treated is provided at the top left end (the end on the motor side) of the drum case 2, and an outlet 12 for discharging the stirred and mixed material to be treated is provided at the bottom right end. Both the left and right ends of the drum case 2 are closed by end plates 10.

[0015] A large number of stirring tines 13 are spirally and radially projected at regular intervals in the left-right direction from the outer periphery of the rotating shaft 7 of the rotor 3, and as shown in Figure 4(A), these stirring tines 13 consist of a feed tine 13a and a return tine 13b at the upper end of the discharge port 12. In this example, the feed tines 13a are hatchet tines that are twisted toward the tip and curved in a mountain shape along the direction of rotation, similar to the rotary (cultivator) tines generally attached to the rotary of a tractor or cultivator, and as the rotor 3 rotates forward, the material to be treated is scraped in and stirred, mixed, crushed, etc., and then transported in the discharge direction.

[0016] The return claws 13b are similar to the feed claws 13a in that they are curved in a mountain shape overall, but the twisting direction toward the tip is opposite, and the forward rotation of the rotor 3 provides a reverse returning action against the discharge (transport) operation of the processed material, preventing the processed material from accumulating above the discharge outlet 12 and ensuring discharge. 15 is a receiving tray located below the discharge outlet 12.

[0017] The drum case 2 has a total length of, for example, about 3.8 m and is formed with a U-shaped cross section as shown in Figure 4(B). Its inner bottom surface consists of a concentric semicircular arc surface that is close to the rotational trajectory L of the stirring claws 13 of the rotor 3. Both front and rear side walls 2a are open vertically upward, and the open ends are covered with flat lids 14 that are removably attached and fixed by clampers 16. The top and left and right ends of the drum case 2 are closed, and the drum case 2 is formed into a cylindrical shape with a U-shaped cross section as a whole.

[0018] An elastic rubber liner (not shown) of a predetermined thickness is attached to the inner surface of the drum case 2 by adhesive or screwing, and there is a clearance of 5 to 6 mm between the outer diameter (rotation path L) of the rotor 3, which is about 320 mm, and the inner diameter of the liner. This mechanism prevents the material to be treated from adhering to the inner surface of the drum case 2 when stirring the material while rotating at, for example, 90 to 300 rpm, thereby maintaining high stirring performance.

[0019] On the rotation locus L of the rotor 3 inside the drum case 2, an agitation space 17 consisting of an irregular space is formed at a corner surrounded by the rotation locus L, the inner surface of the lid 14, and the upper end of the side wall 2a.

[0020] The open end (opening) of the drum case 2 is formed between the inlet 11 and the end of the conveying path (right end), and the lid 14 that closes it is equipped with a hook bolt 18 for lifting, as well as a plurality of nozzles 19 arranged side by side in a row at predetermined intervals in the left-right direction along the axial direction of the rotor 3 at the front end, which is the side where the material to be processed is taken in. The front-to-rear positions are determined according to the rotation direction (take-in direction) of the rotor 3.

[0021] The nozzle 19 is used to spray additives determined depending on the material to be processed and the purpose of the processing onto the material being stirred, and is installed facing downward with the spray direction aligned with the rotation direction of the rotational trajectory of the rotor 3 (the scraping direction of the stirring claws 13).

[0022] Each nozzle 19 has the function of spraying the ejected material inside the drum case 2 while spreading it out in a fan-like shape from side to side along the axial direction (see Figure 4(A)). As a result, inside the drum case 2, the additive is sprayed uniformly in a continuous linear state or nearly so on the left and right sides on the intake side of the rotor 3 along the nozzle arrangement direction, and the gaseous additive improves mixing performance.

[0023] These additives vary depending on the material to be treated and its purpose. For example, when crushing and mixing soil lumps, water is supplied in the form of steam to facilitate crushing, and gas is supplied to improve mixability. Furthermore, when forming aggregates in the next process, additives containing binders that promote aggregate formation are supplied, or additives that impart viscosity to powders, etc. Other additives that have mechanical, physical, or chemical modifying functions, such as pH adjusters, disinfectants, and temperature adjusters, are also envisioned, and may be in gaseous, liquid, powder, granular, or a mixture of these.

[0024] In addition, the processed material that has been raised into the mixing space 17 by the rotor 3 is mixed in a state where it is dispersed in the air, which further improves the mixing function. In addition, spraying the additives into this space has the advantage of increasing the degree of mixing of the additives themselves. [Explanation of symbols]

[0025] 2 drum cases 3 rotors 7 Rotation Axis 13 Stirring claw 14 Lid 17 Mixing space 19 nozzles L rotation locus

Claims

1. The rotor (3) has a number of stirring claws (13) arranged spirally on the outer periphery of a rotating shaft (7) and is supported inside a cylindrical drum case (2). The rotor (3) rotates to stir materials fed into one end of the drum case (2) and discharge them out the other end. The cross section of the lower half of the drum case (2) is formed in an arc shape that follows the rotation path (L) of the rotor (3), and the entire drum case (2) has a U-shaped cross section with the upper end open. A lid (14) closes the open end. and agitation spaces (17) in which the material to be treated is splashed up are formed at the inner corners of the lid (14) and the front and rear side walls (2a, 2b) of the drum case (2), and a plurality of nozzles (19) are installed downward on the lid (14) at predetermined intervals along the axial direction of the rotor (3) to spray additives to be added to and mixed with the material to be treated along the suction direction of the agitation claws (13) only into the agitation space (17) on the suction side of the rotation locus (L) of the rotor (3).

2. 2. The agitator according to claim 1, wherein the nozzle (19) is a nozzle that sprays material in a shape that spreads continuously in a fan shape and in a linear shape along the axial direction of the rotor (3) on the suction side of the drum case (2).

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