JP3118350B2 - Powder mixing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an apparatus for mixing powders and granules which does not cause deterioration (segregation, separation phenomenon, etc.) of the powders or closure due to crosslinking.

[0002]

2. Description of the Related Art Generally, in a manufacturing apparatus for handling mixed powders, it is important to maintain a homogeneous mixed state without deterioration. For this reason, various types of powder / granule mixing apparatuses have been used in manufacturing apparatuses that handle mixed powder / granules.
For example, as a gravity-type device, an inlet is provided at the upper part, an outlet is provided at the lower part, and an opening is provided at the upper part in a cylindrical container having a baffle plate at the lower part, and an opening having a deflector plate is provided below, and Are vertically arranged on the same circumference, with the outlet at the lower end facing the lower side through the baffle plate, and the gap between the outer peripheral edge of the baffle plate and the conical narrowed portion of the cylindrical container. Powder mixing device (Parts No. JP-A-53-66057, Japanese Utility Model Application Laid-Open No. SHO-5-53)
No. 6,110,833), a cover tube is provided at intervals around a lower conical portion of a tank having a supply port at an upper end and a discharge port at a lower end, and provided at an arbitrary height between the upper surface of the cover tube and the tank peripheral surface. A powder / particle mixing apparatus in which a plurality of passages connecting the mouth are arranged on the outer peripheral surface of the tank (Japanese Utility Model Publication No. 55-37226);
Further, in the center of the tank having a supply port at the upper end and a discharge port at the lower end, a plurality of inflow ports formed by inwardly facing conductive plates spaced apart from the outwardly conductive plates are provided on the cylinder peripheral surface. A powder / granule mixing device provided with a central cylinder disposed
No. 883).

The above-mentioned JP-A-53-66057, JP-A-56-110833 and JP-A-55-372.
In the powder and particle mixing apparatus described in Japanese Patent Publication No. 26, since a plurality of conduits are provided in a cylindrical tank, the apparatus is complicated and the production cost is increased. Further, the apparatus for mixing powdery and granular materials described in Japanese Utility Model Application Laid-Open No. 54-32883 is simpler than the above-mentioned apparatus, but since each inlet has an inwardly-covered cover plate, the height of the apparatus is high. If the inlets set up and down are on the same vertical line, the granular material flowing in from the upper inlet cannot be vertically dropped by gravity because it is obstructed by the cover plate of the lower inlet. Scatters on the way. In addition, as long as the powder particles are present at the same height level outside the center cylinder at each inlet, the powder particles flow into the center cylinder, so the density of the powder particles in the center cylinder is large, and cross-linking and segregation occur. Cheap.

As described above, the conventional apparatus has various disadvantages, but more importantly, any apparatus can smoothly mix a granular material having good flowability, but a cross-linking or a powdery material can be performed. Since segregation occurs, there is a disadvantage that it is not suitable for mixing powder materials and its use is limited.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention enables not only a granular material but also a powder material having a low fluidity to be mixed, so that all the granular materials can be efficiently used. It is intended to provide a powder and granule mixing apparatus which can be uniformly mixed.

[0006]

Means for Solving the Problems To achieve the above object, the present invention provides a powder / granule mixing apparatus according to the present invention, which comprises a cylindrical container having an inlet at an upper end and an opening at a lower end; Closed with a top plate, the lower end forms a large area outlet with a constriction ring on the periphery, and a plurality of inflow ports with inwardly protruding eaves are connected to the cylinder by changing the installation position in the height direction and the circumferential direction. Arranged on the surrounding wall and vertically below each eaves inlet,
An inner cylinder provided with one or more eavesless inflow ports is provided therein, and an annular drain with a small gap is provided between the throttle ring of the inner cylinder and an inverted conical throttle formed at the bottom of the cylindrical container. An outlet is formed, and an inner cylinder outlet having a large area is provided inside the annular outlet.

[0007]

When the granular material is fed and filled between the cylindrical container and the inner cylinder through the inlet, the inside of each of the eaves with the eaves arranged at different positions in the height direction and the circumferential direction. The powder particles flowing into the cylinder fall vertically by gravity along the inner cylinder inner wall, and at the same time, also flow in from the eaves-free inflow port installed below,
In the inner cylinder, powder and granules flow into and from the entire peripheral surface of each part without being mixed with each other, and flow at the discharge port from the outer annular discharge port, and powder flow from the inner cylinder discharge port. The granules are mixed and discharged as a homogeneous powder.

The eaves of the eaves with the eaves are effective in securing the inflow of the granules even when the inner cylinder is clogged with the granules at a height higher than the inflow level. Due to the presence, the inflow of the granular material into the inner cylinder from the eaves with different eaves at different installation heights is ensured, and the granular material flows in uniformly from the entire outer peripheral surface of the inner cylinder, and the mixing action of the granular material is improved. More surely.

[0009] The eaves-less inflow port is designed such that when the inside of the inner cylinder is empty at the installation height level, the granular material flows in, but when the granular material is clogged up to that height level, the inflow does not flow. Is not possible, and actively promotes the mixing of powders and granules from each part into the inner cylinder, effectively controlling the amount of powders and particles accumulated in the inner cylinder. Act on.

[0010]

【Example】

Embodiment 1 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the first aspect of the present invention, in which a cylindrical container 1 is cut longitudinally and an inner cylinder 2 is viewed from the front. The cylindrical container 1 has a powder inlet 3 at the upper end and an opening 4 at the lower end. The inner cylinder 2 has an upper end closed by a top plate 5, a lower end forming a large-area outlet having a constriction ring 6 on a peripheral edge, and a plurality of inflow ports 9 having an inwardly protruding eaves 8 at a height. And one or more eaves-free inflow ports 10 are provided vertically below the eaves-equipped inflow ports 9, respectively. An annular discharge port 12 having a small gap is formed between the restrictor ring 6 of the inner cylinder 2 and an inverted conical restrictor 11 formed at the bottom of the cylindrical container. An inner cylinder discharge port 7 having a large area is provided inside the annular discharge port 12, and the granular material flowing down from both the discharge ports is discharged through the opening 4.

A plurality of the eaves-equipped inlets 9 are disposed on the inner cylindrical peripheral wall at different positions in the height direction and the circumferential direction. In the embodiment, eight eaves-equipped inflow ports 9 are provided. Was shown. The arrangement is such that the circumference is divided into eight equal parts as shown in FIG. 1B, and each part a, b, c, d, e, f, g, h
Are provided one by one, but the installation height is changed while being spirally arranged as shown in FIG. 1A. In addition, the arrangement of the inflow port 9 with eaves is not limited to the arrangement of this embodiment, and any other arrangement can be adopted.

Then, each part a, b, c, d, e, f,
One or more eaves-free inflow ports 10 are provided vertically below the eaves-equipped inflow ports 9 arranged at g and h, depending on the installation height of each. Note that, in the figure, the portion a
Since the eaves-inlet 9 installed at the location is close to the outlet 7,
The case where the inflow port without eaves is omitted is shown.

In the above-mentioned apparatus, if the granular material is fed and filled between the cylindrical container 1 and the inner cylinder 2 through the inlet 3, the installation position in the height direction and the circumferential direction is different. The powder and granular material flowing into the inner cylinder from each of the eaves-equipped inlets 9 vertically drops along the inner cylinder inner wall, and at the same time, also flows in from the eaves-less inflow port 10 installed below, into the inner cylinder. From the entire peripheral surface, the granules enter and drop without being mixed with each other at each portion, and the granules flowing down from the outer annular discharge port 12 at the discharge port and the granules flowing down from the inner cylinder discharge port 7 are formed. The powder is mixed and discharged out of the apparatus through the opening 4 as a homogeneous powder.

Embodiment 2 FIG. 2 is a block diagram showing a mass flow discharging machine in the powder and granular material mixing apparatus according to the first embodiment.
The case where it is provided is shown. That is, in the cylindrical container 1, as in the case shown in FIG.
An inner cylinder 2 in which 0 is disposed is provided therein, and a mass flow discharger 13 is connected to a lower end of the cylindrical container 1, that is, the opening 4.

The mass flow discharger 13 does not need to be particularly limited in terms of the mechanism. The mass flow discharger 13 drops from each inlet provided in each part of the inner cylinder, and the powder and granules discharged from the inner cylinder discharge port 7 and the annular body. Any material may be used as long as it can be more efficiently mixed with the powder and granules discharged from the discharge port 12 and finished into a more uniform powder and granules. For example, in the drawing, a circle feeder having substantially the same diameter as the opening 4 was used. Reference numeral 14 denotes a discharge port of the circle feeder. The powder particles falling into the circle feeder are stirred and mixed by a central rotating blade and an outer rotating blade (not shown), and are discharged from a discharge port 14 provided at the outer bottom.

Embodiment 3 FIG. 3 shows an example of a flow sheet of a powder-particle mixing apparatus according to an embodiment of the present invention. The powder-granule mixing apparatus is provided with a hopper 19 at a feed port via a rotary feeder 20 and a mass flow discharger 13 at a discharge port side, while raw material storage silos 15 _a , 15 _b , and 15 _c. , 15 _d have their respective outlets connected to a transport pipe 18 via a rotary feeder 16, and the transport pipe 18 is connected to a hopper 19.
It is connected to the. The mass flow discharger 13 is provided with a return port 21 in addition to the discharge port 14, and is connected to a transport pipe 18 via a rotary feeder 22.

In the above apparatus, for example, the capacity of the powder-granule mixing apparatus is 120 tons, and the raw material storage silos 15 _a , 15 _b , 15 _c
Has a cut-out amount of 4 to 12 ton / h with a capacity of 32 ton,
The raw material storage silo 15 _d has a capacity of 20 tons and a cutout amount of 1 to 1
There 5 ton / h, for example the raw material storage silo 15 _a, 1
5 _b, 15 _c one from A raw material together with cut at 12 ton / h, the B material from the raw material storage silo 15 _d 5 ton /
h and sent to the hopper 19 by the transport pipe 18.
Then, the mixture is sent to the powder / granule mixing device via the rotary feeder 20, mixed while falling by gravity in the device in the manner described above, and discharged to the mass flow discharger 13, where it is further mixed and further homogenized. Out of the outlet 14 and shipped. If it is necessary to repeat the mixing operation by the powder and particle mixing apparatus, the return port 21 is closed and the return port 21 is opened, cut out via the rotary feeder 22, returned to the hopper 19 via the transport pipe 18, and mixed again. Let it.

[0018]

According to the present invention, a simple apparatus in which a cylindrical container is combined with an inner cylinder has a small amount of crushing due to a segregation due to a drop and a mixing operation, and an efficient mixing effect of powders and granules can be obtained. Can be obtained at low cost.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an embodiment of a powder-particle mixing apparatus according to claim 1, wherein A is a front view showing an outer cylindrical container in a broken state, B is an explanatory view showing a circumferential arrangement position of an inflow port with an eaves, C is an explanatory view showing an inlet with an eaves and an inlet without an eaves by breaking a part of the inner cylinder.

FIG. 2 shows a mass flow discharge device for the powder / particle mixing apparatus according to claim 1;
It is a front view which shows the case where an output is attached .

FIG. 3 is an explanatory view showing an example of a flow sheet of the powder and granular material mixing apparatus according to the embodiment of the present invention.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-152533 (JP, A) JP-A-62-266129 (JP, A) JP-A-5-146659 (JP, A) Jpn. 151529 (JP, U) Japanese Utility Model Showa 64-36028 (JP, U) Japanese Patent Publication No. 56-20897 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B01F 3/00-5 / 26

Claims (1)

(57) [Claims] 1. A cylindrical container having an inlet at the upper end for a granular material and an opening at a lower end, a top end closed by a top plate, and a lower end forming a large-area outlet having an aperture ring on a peripheral edge. A plurality of inflow ports having eaves protruding inward are arranged on the cylinder peripheral wall at different installation positions in the height direction and the circumferential direction, and one to a plurality of inflow ports are provided vertically below each eaves-equipped inlet port. An inner cylinder provided with a plurality of eavesless inflow ports is provided therein, and an annular discharge port having a relatively small gap between the throttle ring of the inner cylinder and an inverted conical throttle formed at the bottom of the cylindrical container is provided. A powder-particle mixing apparatus formed and provided with a large-area inner cylinder discharge port inside the annular discharge port.