JP3119030B2 - Screw conveyor equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw conveyor device, and more particularly to a method in which a plurality of unit-length rotating shafts having screw blades are added, and the extended long rotating shaft is rotated to obtain powdery or granular material. Conveyor device which conveys a sheet along a conveying pipeline.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a screw conveyor device of this type comprises a plurality of rotary shafts 2 each having a unit length and having a screw blade 1 provided in the axial direction thereof, via a joint 3 described later. The extended elongate rotating shaft 4 is arranged in the pipeline 5. The conduit 5 is provided upright on a hopper 7 filled with the granular material 6. According to this screw conveyor device, when the driving shaft 8 is rotated by driving the driving motor 8 connected to the upper end of the rotating shaft 4, the powder 6 is transferred from the lower opening 9 of the pipe 5 to the screw 5. It is lifted up by the blade 1, transported upward, and discharged from the upper discharge port 10.

On the other hand, the joint 3 is formed in an I-shaped cross section as shown in FIG.
1 is fixed to a lower flange portion 12 of the upper rotary shaft 2 by bolts 13, and a flange portion 14 formed thereunder is bolted to an upper flange portion 15 of the lower rotary shaft 2.
Has been fixed by. The joint 3 is provided with a bearing 17. The bearing 17 is provided on the rotating side sliding ring 1.
8, rotating hard metal 19, fixed hard metal 2
0, 20, a fixed-side sliding ring 21, and a holder 22.

The rotating side sliding ring 18 is fixed to the outer peripheral portion of the joint 3 and can rotate together with the joint 3, and the rotating side hard metal 19 is connected to the rotating side sliding ring 18 as shown in FIG. It is embedded in the surface of the rotating side sliding ring 18 at a predetermined interval along the axial direction of 18. The fixed-side hard metal 20 includes the rotating-side hard metal 19,
19 are formed in an annular shape so as to be in sliding contact with the orthogonal direction, and are held by the fixed-side sliding ring 21. The fixed-side sliding ring 21 is supported by the conduit 5 via the holder 22.

[0005]

However, the conventional screw conveyor device has a drawback that the ability to convey the granular material is low. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a screw conveyor device that can smoothly transport powder and granules and improve the transport capacity.

[0006]

According to the present invention, in order to achieve the above-mentioned object, a plurality of unit-length rotating shafts provided in the axial direction of a screw blade are added to each other, and the extended rotary shaft is added. A screw conveyer device in which a shaft is disposed in a conduit for conveying powders and granules, and the long rotary shaft is rotated to rotate the screw blades and convey the powders and granules along the conduit. In the above, the bearing is disposed at a predetermined interval in the axial direction of the elongate rotary shaft, the bearing rotatably supports the elongate rotary shaft in the pipeline, the outer peripheral surface of the rotary shaft A rotating hard metal, which is embedded in the outer peripheral surface of the fixed rotating sliding ring at a predetermined interval and is disposed at an angle of 20 ° to 30 ° with respect to the axial direction of the rotating sliding ring; It is arranged in the direction perpendicular to the axial direction of the sliding ring In addition, the inner peripheral surface is formed of a fixed hard metal that slides on the rotating hard metal.

[0007]

The present invention focuses on the fact that the pitch of the screw blades is widened at the joint and the conveying resistance of the powder at the joint is increased, which is a cause of the powder being not smoothly conveyed. The rotating shafts having a unit length were joined to each other at flange portions formed at their respective ends, and were successively added without using a joint. Accordingly, the pitch of the screw blades is shorter than when the rotating shafts having the unit length are joined to each other using the joint, so that the conveyance resistance of the granular material at the joining portion of the rotating shafts is reduced. Therefore, the powder can be smoothly transported.

[0008] Further, the flange portion is formed in a tapered shape so that its diameter increases in the conveying direction of the granular material.
Since the powdery material passing through the joint is sent out toward the inner wall of the conduit at the tapered surface of the flange, it is advantageous when a bearing for the rotating shaft is arranged near the joint. That is, since the powder particles passing through the joint portion are transported avoiding the bearing, the powder particles are transported smoothly without being disturbed by the bearing, and early wear of the bearing due to the powder particles can be prevented.

Further, since the rotating hard metal constituting the bearing is disposed at an angle of about 20 ° to 30 ° with respect to the direction in which the annular fixed hard metal is formed, the rotating hard metal is fixed with respect to the fixed hard metal. Smooth metal contact. This extends the service life of the rotating hard metal and the fixed hard metal.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the screw conveyor device according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a sectional side view of a main part of a screw conveyor device 30 according to the present invention, and FIG. 2 is a plan cross-sectional view of a main part of the screw conveyor device 30, which is the same as the conventional screw conveyor device shown in FIGS. Similar members will be described with the same reference numerals.

In FIG. 1, a rotary shaft 32 having a unit length disposed in a pipe 5 of the screw conveyor device 30 is provided.
32 are flanges 3 formed on the upper and lower ends, respectively.
After the parts 4 and 36 are butted together, they are sequentially joined in a long shape by bolts 38. The flange 34 formed at the upper end of the rotary shaft 32 is formed in a tapered shape so that its diameter increases in the direction of transport of the granular material indicated by arrow A in the figure.

On the other hand, as shown in FIGS. 1 and 2, the bearing 40 for rotatably supporting the rotating shaft 32 in the pipe line 5 includes a rotating sliding ring 18, a rotating hard metal 42, and a fixed hard metal 42. 20, 20, a fixed-side sliding ring 21, and a holder 22. The rotating side sliding ring 18 is fixed to a lower outer peripheral portion of the rotating shaft 32 by a pair of upper and lower metal pressing rings 44, 44 and can rotate together with the rotating shaft 32.

As shown in FIGS. 3 and 4, the rotating hard metal 42 is embedded in the outer peripheral surface of the rotating sliding ring 18 at a predetermined interval, and the axial direction of the rotating sliding ring 18 (see FIG. 3). 20 ° to 30 ° with respect to arrow B direction)
It is arranged at an angle. The fixed side hard metal 2
Numeral 0 is arranged in a direction orthogonal to the axial direction of the rotating side sliding ring 18 and is formed in an annular shape so that its inner peripheral surface is in sliding contact with the rotating side hard metal 42. The fixed-side hard metal 20 is held by the fixed-side sliding ring 21.
Are supported by the conduit 5 via the holder 22.

Next, the operation of the screw conveyor device 30 configured as described above will be described. First, the screw conveyor device 30 of the present embodiment is configured such that the rotating shafts 32, 32 having a unit length are formed with flanges 3 formed at respective ends.
4 and 36, and the joints are sequentially added without using a joint. Therefore, compared with the conventional screw conveyor device in which the rotating shafts 2 and 2 are joined using the joint 3 shown in FIG. Screw blades 1, 1 pitch L
Can be shortened.

Therefore, the granular material being conveyed in the pipeline 5 is smoothly conveyed at the joint of the rotary shafts 32 without increasing the conveyance resistance. As a result, the ability to transport the granular material is improved. The upper flange 34 of the rotating shaft 32
Is formed in a tapered shape whose diameter increases in the conveying direction of the granular material, so that the granular material passing through the joint of the rotating shafts 32 is fed toward the inner wall of the pipeline 5.

Therefore, the powdery material passing through the joint is
Since the powder is conveyed while avoiding the bearing 40, the powder does not enter the sliding portion of the bearing 40. As a result, the granular material is
In addition to being smoothly conveyed without being disturbed, the bearing 40 can be prevented from being abraded early due to the powdery particles. Further, as shown in FIGS. 3 and 4, the rotation side hard metal 42 of the bearing 40 is 20 ° to 3 ° with respect to the fixed side hard metal 20.
Since the rotating hard metal 42 is disposed at an angle of about 0 °, the rotating hard metal 42 has an edge 42 </ b> A of the rotating hard metal 42 as compared with a conventional screw conveyor device arranged in a direction orthogonal to the fixed hard metal 20. , The contact of the fixed side hard metal 20 becomes smooth. Thereby, the service life of the rotating hard metal 42 and the fixed hard metal 20 can be extended.

[0017]

As described above, according to the screw conveyor device of the present invention, the rotation shafts having the unit length are
Since the joints are sequentially added without using a joint, the pitch of the screw blades can be shorter than that of a conventional screw conveyor device in which rotary shafts of unit length are joined to each other using the joint. Thereby, the conveyance resistance of the granular material at the joining portion is reduced, so that the ability to transport the granular material can be improved.

Further, the flange portion is formed in a tapered shape such that its diameter increases in the direction of transport of the granular material,
Since the particles are prevented from entering the bearing, the particles can be smoothly transported without being hindered by the bearing, and the bearing can be prevented from being worn early by the particles. Further, the bearing is embedded at a predetermined interval in the outer peripheral surface of the rotating side sliding ring fixed to the outer peripheral surface of the rotating shaft, and is inclined by 20 ° to 30 ° with respect to the axial direction of the rotating side sliding ring. The rotating hard metal is arranged in a direction orthogonal to the axial direction of the rotating sliding ring, and has a fixed hard metal whose inner peripheral surface is in sliding contact with the rotating hard metal. As a result, the contact of the fixed-side hard metal with the edge of the rotating-side hard metal becomes smooth, and the service life of the rotating-side hard metal and the fixed-side hard metal can be extended.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of an embodiment of a screw conveyor device according to the present invention.

FIG. 2 is a plan cross-sectional view of a main part showing an embodiment of the screw conveyor device according to the present invention.

FIG. 3 is a perspective view of a rotary sliding ring applied to the screw conveyor device according to the present invention.

FIG. 4 is an exploded view of a rotary sliding ring.

FIG. 5 is an overall view of a conventional screw conveyor device.

FIG. 6 is a sectional side view of a main part of a conventional screw conveyor device.

FIG. 7 is a perspective view of a rotary sliding ring applied to a conventional screw conveyor device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Screw blade 5 ... Pipe line 18 ... Rotating side sliding ring 20 ... Fixed side hard metal 21 ... Fixed side sliding ring 22 ... Holder 30 ... Screw conveyor device 32 ... Rotary shaft 34, 36 ... Flange 40 ... Bearing 42 ... Rotating hard metal

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65G 33/00-33/38

Claims (1)

(57) [Claims] 1. A screw blade includes a plurality of unit-length rotating shafts provided in the axial direction thereof, and a plurality of extended rotating shafts arranged in a conduit for conveying powder and granules. In a screw conveyor device that rotates the screw blade by rotating a long rotating shaft and conveys the granular material along the pipeline, a predetermined length of the long rotating shaft is set in an axial direction of the rotating shaft. Are arranged at intervals of
A shaft for rotatably supporting the long rotating shaft in the conduit.
The bearing is located outside the rotating side sliding ring fixed to the outer peripheral surface of the rotating shaft.
It is embedded at a predetermined interval in the peripheral surface, and
20 ° to 30 ° with respect to the axial direction of the ring
The rotating side hard metal and the direction perpendicular to the axial direction of the rotating side sliding ring.
And the inner peripheral surface thereof is
A screw conveyor device comprising: a fixed-side hard metal that is in sliding contact with a screw.