JP2001278434A - Powder and grain supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder and grain supply device stably operable without stopping for a long period by preventing powder and grain from entering into a bearing part arranged in a shaft end part of a rotary shaft for rotating by interlocking with a moving means or easily finding the powder and grain when the powder and grain starts to enter into the bearing part when moving the powder and grain, for example, cement, fly ash, feed or grain. SOLUTION: This powder and grain supply device having the rotary shaft for rotating by interlocking with a means for moving the powder and grain, is provided with the bearing part 28 for rotatably supporting the shaft end part of the rotary shaft and a seal device 30 adjacently arranged to this bearing part 28, and the seal device 30 is composed of a grease impregnated felt-like member arranged so as to surround the shaft end part and an oil seal arranged on at least one side of this felt-like member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder and granular material supply apparatus, for example, a screw conveyor apparatus, a chain conveyor apparatus, and the like suitable for conveying powder such as cement and fly ash, or granular substances such as feed and grains. The present invention relates to improvements in a rotating shaft seal structure and a bearing mounting structure in a bucket elevator device, a rotary valve type metering device, or the like.

[0002]

2. Description of the Related Art Conventionally, powders such as cement and fly ash, or granular materials such as feed and grains are stored and stored.
The granular material storage tank device 1 to be taken out when necessary is shown in FIG.
As shown in the figure, basically, a funnel-shaped immediate-conical bottom plate 3 having an outlet 2 formed as an outlet at the center of the lower end and tapered toward the outlet 2 is formed into a vertically long cylindrical shape. It was configured to be integrally attached to the lower end of the body 4.

[0005] Immediately below the discharge port 2 in such a granular material storage tank device 1, a granular material conveying device is installed, and the granular material taken out from the granular material storage tank device 1 as needed is removed. It is continuously transported or transported to a predetermined place. Generally, a screw conveyor device 5 is used as the powder and granular material transport device. Normally, granular storage tank device 1
The screw conveyor device 5 that initially conveys the powdery material taken out of the apparatus is inclined and installed so that the end side (discharge end) is slightly higher than the start end side (supply end).

Then, the first screw conveyor device 5
Is transferred to another screw conveyor device 6 installed vertically at the end side thereof, and is conveyed to a predetermined place. As described above, the conventional screw conveyor device is rarely used by being horizontally arranged, and is usually used by being installed in an inclined state.

[0005]

By the way, as a general configuration of the screw conveyor device 5, as shown in FIG. 21, a screw shaft 8 is disposed inside a casing 7, and a shaft end of the screw shaft 8 is provided. 8a is a bearing 1 installed on an end plate 9 attached to an end of a casing 7.
It is rotatably supported by 0.

[0006] In order to prevent intrusion of powdered materials, dust and the like, which are conveyed, into the bearing portion 10, the bearing portion 1 is provided.
The oil seal 11 is attached to the inside of the screw seal, that is, on the screw shaft side, adjacent to the oil seal 0. However, when the granular material is transported in a state where the screw conveyor device 5 is inclined, the granular material wraps downward and the oil seal 11 frequently enters despite being in the opposite direction to the transport direction. I do.

When the function of the oil seal 11 starts to deteriorate due to the intrusion of the powdery and granular materials into the oil seal 11, the oil and gas particles enter the inside of the bearing portion 10, and eventually damage the bearing (bearing) portion 10. In each case, the equipment such as the screw conveyor was stopped for repair or cleaning. Therefore, including the screw conveyor device, in the conventional granular material conveying device, to prevent the granular material from sneaking into the bearing portion that rotatably supports the shaft end of the rotating shaft in an oil seal to prevent, There has been a demand for the development of a powder and granular material transfer device that can be stably operated without stopping for a long period of time, especially a seal device.

An object of the present invention is to solve such a conventional problem. For example, when moving a granular material such as cement, fly ash, feed, or grain,
Prevents powder particles from sneaking into the bearing installed at the shaft end of the rotating shaft that rotates in conjunction with the moving means, or makes it easier to find when the particles start to sneak into the bearing. An object of the present invention is to provide a powder and granular material supply device that can be stably operated without stopping for a long time.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a powdery and granular material supply apparatus having a rotating shaft which rotates in conjunction with a means for moving a granular material, and a bearing for rotatably supporting an end of the rotating shaft. And a sealing device disposed adjacent to the bearing portion, wherein the sealing device includes a grease-impregnated felt member disposed to surround the shaft end, and at least one side of the felt member. And an oil seal arranged.

Specifically, the sealing device includes an annular seal box concentrically disposed at the shaft end, and a felt-like member is provided between the inner peripheral surface of the seal box and the outer peripheral surface of the shaft end. It is arranged in the annular space, and the oil seal is arranged on at least one side of the felt-shaped member.

Further, in the powder and granular material supply device of the present invention, the bearing portion is detachably mounted on a cylindrical bearing mounting part mounted on the fixed portion of the powder and granular material supply device, and the outer end is mounted on the shaft end. The sealing device is located inside the bearing mounting part, and is characterized in that it can be inserted into and removed from the inside of the bearing mounting part before the bearing part is mounted on the bearing mounting part.

Preferably, a grease supply passage penetrating from the outer peripheral surface to the inner peripheral surface is formed in the seal box.
In that case, a grease injection portion is provided in the grease supply passage on the outer peripheral surface side of the seal box. Also, an opening is formed in the lower part of the bearing mounting part for mounting the bearing part, so that when the granular material enters and leaks from the sealing device, it spills out of the bearing mounting part from the opening, so that the bearing part of the granular material is formed. It is also preferable to be able to detect the wraparound.

Further, in the powder and granular material supply device of the present invention, at least two grease penetration holes are formed in the felt-like member at positions corresponding to the axial position of the grease supply passage provided in the seal box, and the grease supply passage is formed. Grease supplied from the inside of the felt-like member can be promptly permeated into the inner peripheral surface of the felt-like member through the permeation hole.

The powder and granular material supply device according to the present invention is installed immediately below a discharge port of a storage tank device that stores the powder and granules, and supplies the powder and granular material taken out from the discharge port of the storage tank device. It is particularly preferable to use a screw conveyor device that continuously transfers the powder to a predetermined position, because the powder can be stably supplied over a long period of time.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a granular material supply apparatus according to an embodiment of the present invention; FIG. I do. FIG. 1 is a cross-sectional view showing a bearing-side end which is a main part of a screw conveyor device according to an embodiment of the present invention. The screw conveyor device 20 according to this embodiment includes a cylindrical casing 21 and a screw shaft 22 disposed therein.

An end of the screw shaft 22 disposed in the casing 21, that is, a shaft end 22 a projects outward through a through hole formed in an end plate 23 closing the end of the casing 21. I have. A disc-shaped mounting plate 24 is detachably mounted on the end plate 23 with bolts and nuts 25. The mounting plate 24 has a central opening 24a (FIG. 2) that matches the through hole of the end plate 23 so that the shaft end 22a can be inserted therethrough.

The mounting plate 24 further includes a central opening 24.
One end of a cylindrical spacer portion (hereinafter simply referred to as a spacer ring) 26 arranged concentrically with a is fixed by welding or the like or formed integrally with the mounting plate 24.

FIG. 2 and FIG. 3 show a bearing mounting part 27 in which one end of a spacer ring 26 is concentrically positioned on a mounting plate 24 and integrally fixed by welding. For the bearing mounting component 27 mounted on the end plate 23 using a bolt and nut, the bearing portion 2 is formed using an inwardly protruding flange portion 26 a formed at the other end of the spacer ring 26.
8 is removably attached with bolts 29.

That is, the bearing 28 already assembled and unitized has the shaft end 2 inside its inner race.
2a is closely attached to the inwardly protruding flange portion 26a of the bearing mounting component 27 from the axial direction (left side in FIG. 1) so as to be inserted, and the bolt 29 is fastened and fixed. Thus, the shaft end 22a is rotatably supported by the bearing 28. The bearing 28 itself is a conventional one and is not particularly new, so that its detailed structure is omitted.

Prior to mounting the bearing portion 28 to the bearing mounting component 27, the sealing device 3 is positioned adjacent to the mounting plate 24.
0 is placed. Details of the sealing device 30 are shown in FIG. That is, the sealing device 30 includes the mounting plate 2
4 is provided with a cylindrical seal box 31 concentrically disposed in the center opening 24a. The outer diameter of the cylindrical seal box 31 is the same as that of the inwardly projecting flange portion 2 formed at the other end of the spacer ring 26 forming the bearing mounting part 27.
It is designed to be somewhat smaller than the inner diameter of 6a.

Thus, the seal box 31 is inserted from the opening 26b defined by the inwardly projecting flange portion 26a in a state where the seal end is fitted (hereinafter referred to as an exterior) so that the shaft end 22a is inserted into the center opening. It can be easily taken in and out of the spacer ring 26.

On the other hand, the inner diameter of the seal box 31 is
It is designed to be larger than the outer diameter of the shaft end 22a. As a result, when the seal box 31 is externally mounted on the shaft end 22a, the difference between the inner diameter of the former and the outer diameter of the latter results in the shaft end 22a.
Is formed between the outer peripheral surface of the box 31 and the inner peripheral surface of the box 31.

Oil seals 32 and 33 are disposed on both sides of the annular space, and a felt 34 is disposed between the two oil seals so as to surround the entire periphery of the shaft end 22a. I have. A grease supply passage 35 penetrating from the outer peripheral surface to the inner peripheral surface is formed in the seal box 31, and a container-like grease injection portion 36 is provided in the grease supply passage 35 on the outer peripheral surface side of the seal box 31.

The felt 34 has at least two grease penetration holes 34a formed at positions corresponding to the axial position of the grease supply passage 35. These grease penetration holes 3
Reference numeral 4a allows the grease supplied from the grease supply passage 35 to quickly permeate the inner peripheral surface of the felt 34 through the permeation hole 34a.

In this seal box 31, a plurality of bolt insertion holes 37 penetrating from one end surface to the other end surface in the axial direction are formed at equal intervals in the circumferential direction. On the side surface of the mounting plate 24, a recess 38 is formed for positioning the seal box 31 concentrically with respect to the shaft end 22a, whereby the seal box 31 is inserted into the spacer ring 26 of the bearing mounting part 27. Thus, accurate positioning with respect to the shaft end 22a can be performed only by arranging the fitting so as to fit into the recess 38 on one side of the mounting plate 24.

The fixing of the seal box 31 to the mounting plate 24 is performed by inserting bolts 39 into the plurality of bolt insertion holes 37 and screwing them into the screw holes 40 formed in the mounting plate 24. At that time, a pressing plate 41 is arranged on the end face of the seal box 31 on the opposite side to the mounting plate 24, and is fastened together by bolts 39. The pressing plate 41 prevents the oil seals 32, 33 and the felt 34 from coming out of the annular space.

Bearing mounting part 2 for mounting the bearing portion 28
An opening 27a is formed in at least the lower surface of the spacer ring 27 constituting the sealing device 7, and if the granular material is
In the case where the gasket enters the cylinder 0 and leaks out toward the bearing portion, it spills out of the bearing mounting part 27 from the opening 27a.

In this way, if the granular material is
When it leaks in the direction of the bearing part, it is possible to quickly find out that, so that necessary repairs such as replacement of the sealing device 30 can be performed before the bearing part 28 is damaged such as seizure, Trouble can be prevented from spreading.

The replacement operation of the sealing device 30 can be inferred from the structure described above.
First, as shown in FIG.
The bolt 29 fixed to the shaft 7 is removed, and the bearing 28 is removed from the shaft end 22a. Next, as shown in FIG. 7, the bolt 39 fixing the seal device 30 to the mounting plate 24 of the bearing mounting component 27 is removed.

Then, the sealing device 30 is removed from the shaft end 22a through the opening 26b defined by the inwardly extending flange 26a of the bearing mounting part 27. afterwards,
The new sealing device 30 is assembled in a procedure reverse to the above-described disassembly procedure, and finally, the removed bearing portion 28 is reinstalled. The driving rotation of the screw shaft 22 in the screw conveyor device 20 for transporting the granular material is the same as the conventional one.

That is, although not particularly shown, a sprocket is mounted at an appropriate position on the shaft end of the screw shaft, and a drive chain is hung on a sprocket mounted on an output shaft of a drive motor provided separately from the sprocket. The rotational force of the drive motor is transmitted to the screw shaft.

In the screw conveyor device of the above-described embodiment, a felt is used for the sealing device, and the grease is impregnated in the sealing device. However, the present invention is not limited to a specific material called a felt. A material similar to felt, for example, a material processed to a material similar to felt using a woven or non-woven fabric formed of a synthetic fiber or a chemical fiber can also be used.

The above-described screw conveyor device 20 comprises:
As shown in FIG. 14, it can be used as a granular material supply plant together with a storage tank device that stores granular materials. In this case, it is particularly preferable to use the following structure as a tank device for storing the granular material.

FIG. 9 is a longitudinal sectional view schematically showing the granular material storage tank device 50, and FIG. 10 is a top view of the granular material storage tank device 50 as viewed from above. The granular material storage tank device 50 basically includes a tank body 54 in which a cone portion 52 is connected to a lower portion of a cylindrical body 51 and a discharge port 53 is provided in a central portion of the cone portion 52. . The diameter D of the cylindrical body 51 constituting the tank body 54
Is 2700 mm, and the diameter S of the outlet 53 is 330 m
m, and the angle θ of the cone portion 52 with respect to the horizontal line is 60
Designed every time.

Inside the tank body 54, an annular concave portion 59 having a W-shaped cross section is formed in cooperation with the cone portion 52, and the lower end of the annular concave portion 59 is formed on the lower side along the cone portion 52. A communicating opening is formed. An opening is formed at the top of the inverted V-shaped chevron located at the center of the annular recess 59, and this opening communicates with the lower side of the cone 52.

This configuration will be described more specifically. W-shaped annular concave portion 5 formed in cooperation with cone portion 52
9 has a conical portion 55 of the top opening inside the tank body 54.
Are provided at a predetermined interval from the surface of the cone portion 52 by a plurality of support legs 56. Here, the conical portion 55 refers to a conical component that is installed with its pointed end facing forward, that is, upward.

A plurality of strip-shaped support legs 56 spaced apart in the circumferential direction are fixed to the peripheral surface of the conical portion 55 near the bottom edge 55c, that is, the outer surface of the inclined wall 55a, by welding or adhesive. Attached by means. Each support leg 56 protrudes from the bottom edge 55c by a predetermined length along the downward slope of the inclined wall 55a. The lower end of each support leg 56 is fixed on the inner surface of the cone portion 52 by a suitable fixing means such as welding or an adhesive.

The conical portion 54 may be solid inside or hollow like an umbrella. However, in order to reduce the weight of the whole granular material storage tank device, it is preferable to use a fan-shaped plate material which is bent in a conical shape and formed in an umbrella shape. In either case, the top of the tip is open, and the opening 55b is open to the bottom of the conical portion 55. The diameter L1 of the opening 55b is 120 mm.
It is good to be. The inclined wall 55 in the conical portion 55
The inclination angle α of a with respect to the horizontal line is 55 degrees.

The conical portion 55 is formed by projecting the support legs 56 from the bottom edge 55c to form the tank body 54.
Is placed at a predetermined height from the inner surface of the cone portion 52, and the bottom edge 55c of the cone portion 55 and the cone portion 5 at that time are arranged.
The distance P (the distance along the inclined lower direction of the inclined wall 55a) P to the inner surface of No. 2 is preferably 300 mm. Further, the cylindrical body 5
In the case of the tank body 54 in which the diameter D and the diameter S of the discharge port 13 are designed to have the above-described dimensions, the outer diameter L2 of the bottom of the conical portion 55 is preferably 1300 mm.

In the granular material storage tank device 50, a contact plate 57 is arranged along the peripheral surface of the tank main body 54 at a connection portion between the cylindrical body 51 and the cone portion 52 on the inner surface of the tank main body 54. By this. The bending angle from the inner peripheral surface of the cylindrical body 51 to the cone portion 52 is made smooth, and the adhesion of the granular material to the connecting portion is prevented.

The operation of the granular material storage tank device 50 thus configured, that is, the discharging operation of the granular material stored therein will be described. As shown in FIG.
When the granular material 12 is accommodated in the granular material storage tank device 50 according to this embodiment, and the outlet 53 of the cone portion 52 is opened, the granular material 12 substantially creates two flows to form the outlet 5.
Flow out to 3.

One flow flows into a W-shaped annular groove 59 defined by the cone portion 52 and the inclined wall 55a of the cone portion 55, as indicated by an arrow 58, and flows from the inner surface of the cone portion 52 to the inner surface thereof. This is a path toward the outlet 53 through a substantially annular gap with the bottom edge 55c of the conical portion 55 separated by the plurality of support legs 56.

On the other hand, as shown by an arrow 60, another flow is formed by an opening 55 formed at the top of the conical portion 55.
This is a path from b to the discharge port 53 of the tank body 54, which is the lower end of the cone part 52, passing through the inside of the cone part 55. This path allows the powder or granular material located at the center of the tank body 54 to flow toward the discharge port 53. Broadly speaking, these two flows allow the powder storage tank device 50 to be used.
On average, the whole of the powder and granules contained in the container is smoothly discharged from the lower side.

When an experiment was conducted by actually manufacturing the powder storage tank device 50 having this structure, the internal flow phenomenon (only the powder existing on the central axis passing through the discharge port was discharged substantially linearly). Phenomena in which the granules in other parts are not discharged), bridging phenomenon (only the granules near the outlet of the cone part are naturally discharged, and that part becomes hollow, and the granules in other parts are removed) Is not discharged) or remains and sticks (particles adhere to the inner wall surface of the tank device, especially near the connecting portion between the cylindrical body and the cone portion, and the adhered particles are not discharged. There was no occurrence of such a phenomenon that the powder remains as a solid), and the content of the powder was discharged while its upper level surface was reduced in a small wave state as shown in FIG.

As described above, according to the powdery / granular material storage tank device, when the contents contained therein are discharged like the conventional granular / granularity storage tank device, the contents are reduced to a mortar shape. As a result, there is no occurrence of an internal flow phenomenon, a bridging phenomenon, or a residual / fixed phenomenon, and as a result, the first-in first-out operation can be reliably performed and the quality can be stabilized.

The cylindrical body 5 constituting the tank body 54
By applying a powder adhesion preventing paint on the inner surface of the first and inner surfaces of the cone portion 52, the outer surface of the backing plate 57 and the outer surface of the conical portion 55, etc., the powder particles can be more smoothly discharged. Can be given.

FIGS. 12 and 13 show another granular material storage tank device 61. FIG. 12 is a sectional view of the granular material storage tank device 61, similarly to FIG. 9, and FIG. 13 is a top view seen from above. It is. The point that the cone portion 62 constituted by the inclined wall having a gentle angle is connected to the cylindrical body 51 in the granular material storage tank device 61 is different from the granular material storage tank device 61 shown in FIGS. Different from the tank device 50.

That is, this granular material storage tank device 61
Then, the cone portion 62 is formed at an angle of 20 degrees with respect to the horizontal line. Therefore, it is difficult for the powdery material as the content to flow naturally to the outlet 53 along the cone portion 62. Therefore, a sheet 63 called canvas cloth is laid on the inner surface of the cone portion 62.

The sheet 63 is not particularly limited as long as it is a material that does not easily cause clogging and has good slipperiness even with fine particles such as cement. As such a material, it has become clear that a woven fabric formed by weaving Tetron (registered trademark) fiber can be used quite well. In the powder storage tank device 61, the backing plate is not attached. In FIG. 13, reference numeral 64 denotes a canvas cloth holder for laying the canvas cloth 63 on the cone portion 62.

As described above, when the angle of the cone portion 62 with respect to the horizontal line is small, a sheet 63 having good slippage may be laid on the surface of the cone portion 62 so that the powder storage device 50 of the first example described above can be used. Similarly, there is no internal flow phenomenon, no bridging phenomenon, no residual / sticking phenomenon, etc., and the stored powder can be discharged. As a result, first-in, first-out can be performed reliably, and quality can be stabilized. Can be planned.

If the powder and granules taken out from the powder and granule storage tank devices 50 and 61 configured as described above are transported to a predetermined position by the screw conveyor device 20 of the above-described embodiment, the powder and granule storage A powder and granular material supply plant that can transfer powder and granular material from a powder and granular material storage tank device to a target location very efficiently by stable removal of the tank device over a long period of time and stable continuous operation by the screw conveyor device of the present invention. Can be provided.

In the powder and granular material supply apparatus of the present invention, a screw conveyor device has been described as a preferred embodiment, but the present invention is not limited to such a screw conveyor device. The "particulate material supply device" of the present invention moves a granular material such as a chain conveyor device, a belt conveyor device, a bucket elevator device, a rotary kiln, or a rotary valve type metering supply device, including a screw conveyor device. In this case, the present invention can be applied to all devices having a rotating shaft that rotates in conjunction with a component serving as the moving means.

Therefore, a brief description will be given of some examples of another embodiment of the powder and granular material supply apparatus of the present invention. FIG. 15 schematically shows a chain conveyor apparatus 70 of another embodiment of the present invention. Is shown in In this chain conveyor device 70, sprockets 73 are attached to rotating shafts 72 installed across the casing at both ends of an elongated box-shaped casing 71 (FIG. 16).
A chain 74 is hung over the sprocket 73.

An attachment 75 for moving the granular material supplied into the casing 71 is attached to the chain 74 at a predetermined interval. In such a chain conveyor device 70 as well, the bearing attachment parts 27 are attached to the shaft ends at both ends of the rotating shaft 72,
A sealing device 30 is provided inside the shaft so as to be externally provided at the shaft end, and a bearing 28 is detachably attached to a bearing attachment part 27.

Also in this case, the bearing mounting part 27, the bearing part 28 and the sealing device 30 at the shaft end of the rotary shaft 72 are provided.
Is substantially the same as that of the screw conveyor device shown in FIG. 1, and therefore, detailed description is omitted.

FIGS. 17 and 18 schematically show a bucket elevator apparatus 80 according to still another embodiment of the present invention. The bucket elevator device 80
A large number of buckets 82, which feed powder and granules from a charging port 81 formed at a lower portion of the apparatus and move endlessly in a vertical direction.
Into the upper part of the apparatus, and the powder and the granular material discharged from the bucket 82 at the time of moving from rising to lowering are discharged to the outlet 83 at the upper part of the apparatus.
It is discharged from.

Such a bucket elevator device 80
Then, as shown in FIG. 18, a rotary shaft 85 for driving an endless chain 84 to which a number of buckets 82 are attached.
Are located at the top and bottom of the device. In the bucket elevator device 80, the bearing attachment parts 27 are attached to the shaft ends on both sides of the rotary shaft 85 provided at the lower part of the device in the same manner as described above. A bearing 28 is removably mounted on the bearing mounting part 27 so as to be mounted on the end.

In FIG. 18, reference numeral 86 denotes a sprocket attached to an intermediate portion of the rotating shaft 85. Each sprocket 86 attached to each rotating shaft 85 provided at the lower part and the upper part of the apparatus has , A bucket support chain is suspended.

FIGS. 19 and 20 show a rotary valve type metering / feeding device 9 according to still another embodiment of the present invention.
0 is schematically shown. The rotary valve type metering / feeding device 90 is disposed immediately below a lower discharge port of a hopper or a silo type tank. When the rotor 91 rotates by a predetermined rotation angle, a certain amount of powder is discharged downward. The valve-type metering device 90 itself is already well known.

In such a rotary valve type metering / feeding device 90, as shown in FIG.
The bearing mounting parts 27 are attached to the shaft ends on both sides of the rotating shaft 92 supporting the bearing 1 in the same manner as described above, and the seal device 30 is disposed inside the shaft mounting end so as to be externally mounted on the shaft ends. A bearing 28 is detachably attached to the component 27.

As described above, the present invention includes a screw conveyor device, a chain conveyor device, a belt conveyor device, a bucket elevator device, a rotary kiln, or a metering / feeding device with a rotary valve, and the like. The present invention can be applied to a powder and granular material supply device provided with a rotating shaft that rotates in conjunction with a component that is a means.

[0062]

As described above, according to the granular material supply apparatus of the present invention, for example, cement, fly ash,
When moving granular material such as feed or cereals, the granular material can be prevented from sneaking into the bearing installed at the shaft end of the rotating shaft that rotates in conjunction with the moving means, or the granular material Can easily be found when it starts to go around the bearing part, whereby stable operation can be performed without stopping for a long time.

Further, according to the powder and granular material supply device of the present invention, even if the powder and granular material wraps around the bearing portion and causes damage, the sealing device can be easily and quickly replaced and repaired. Therefore, the time for stopping the operation can be shortened, and the conveyance of the granular material with extremely high productivity can be performed.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a bearing mounting part constituting the screw conveyor device shown in FIG.

FIG. 3 is a side view of the bearing mounting component shown in FIG. 2 as viewed from a left side surface.

FIG. 4 is a cross-sectional view showing a structure of a bearing mounting part and a sealing device located inside the bearing mounting part in the screw conveyor device shown in FIG.

5 is a cross-sectional view schematically showing a process of disassembling a main part of the screw conveyor device shown in FIG. 1 (a process of removing a bearing portion).

FIG. 6 shows the screw conveyor device shown in FIG.
It is sectional drawing cut | disconnected and shown along 6 lines.

7 is a cross-sectional view schematically showing a process of disassembling a main part of the screw conveyor device (sealing device removing process), similarly to FIG. 5;

FIG. 8 shows the screw conveyor device shown in FIG.
It is sectional drawing cut | disconnected and shown along 8 lines.

FIG. 9 is a longitudinal sectional view schematically showing a granular material storage tank device suitable for use with the screw conveyor device of the present invention.

FIG. 10 is a top view of the granular material storage tank device shown in FIG. 9 as viewed from above.

FIG. 11 is an explanatory diagram illustrating a flow at the time of discharging the granular material stored inside the granular material storage tank device shown in FIG. 9;

FIG. 12 is a longitudinal sectional view schematically showing another granular material storage tank device suitable for use with the screw conveyor device of the present invention.

FIG. 13 is a top view similar to FIG. 10, showing the granular material storage tank device shown in FIG. 12 as viewed from above.

FIG. 14 is a configuration explanatory view schematically showing a conventional granular material storage tank device and a conventional screw conveyor device installed immediately below a discharge port thereof.

FIG. 15 is a side view schematically showing a chain conveyor device according to another embodiment of the present invention.

FIG. 16 is a top view showing a main part of the chain conveyor device shown in FIG. 15;

FIG. 17 is a side view schematically showing a bucket elevator apparatus according to still another embodiment of the present invention.

FIG. 18 is a sectional view showing a main part of the bucket elevator apparatus shown in FIG.

FIG. 19 is a longitudinal sectional view schematically showing a rotary valve type metering / feeding device according to still another embodiment of the present invention.

20 is a cross-sectional view showing the rotary valve type metering and feeding device shown in FIG. 19, taken along line 20-20.

FIG. 21 is a sectional view schematically showing a structure of a main part in a conventional screw conveyor device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Granular material 20 Screw conveyor device 21 Cylindrical casing 22 Screw shaft 22a Shaft end part 23 End plate 24 Mounting plate 24a Center opening 26 Spacer ring 26a Inwardly protruding flange part 26b Opening 27 Bearing mounting part 27a Opening 28 Bearing part 29 bolt 30 sealing device 31 seal box 32, 33 oil seal 34 felt 34a grease penetration hole 35 grease supply passage 36 grease injection part 37 bolt insertion hole 39 bolt 40 screw hole 41 holding plate

Claims (7)

[Claims] An apparatus for supplying a granular material, comprising: a rotating shaft that rotates in association with a means for moving a granular material; a bearing portion rotatably supporting an end of the rotating shaft; A sealing device disposed adjacently, wherein the sealing device is a grease-impregnated felt-like member arranged to surround the shaft end, and an oil seal is disposed on at least one side of the felt-like member. And a powder and granular material supply device. 2. The seal device according to claim 1, further comprising an annular seal box concentrically disposed at the shaft end, wherein the felt-like member is disposed between an inner peripheral surface of the seal box and an outer peripheral surface of the shaft end. The granular material supply device according to claim 1, wherein the oil seal is disposed in at least one side of the felt-shaped member. 3. The sealing device, wherein the bearing portion is detachably attached to a cylindrical bearing attachment component attached to a fixed portion of the powder and granular material supply device, and the seal device is provided at the shaft end. 3. The sealing device according to claim 2, wherein the sealing device is located inside the bearing mounting component, and can be inserted into and removed from the inside of the bearing mounting component before mounting the bearing portion to the bearing mounting component. 4. The granular material supply device as described in the above. 4. A grease supply passage penetrating from the outer peripheral surface to the inner peripheral surface of the seal box, and a grease injection portion is provided in the grease supply passage on the outer peripheral surface side of the seal box. Claim 2.
Or the granular material supply apparatus as described in 3. 5. An opening is formed in a lower part of the bearing mounting part for mounting the bearing part, and when the granular material enters the sealing device and leaks therefrom, spills out of the bearing mounting part from the opening. The powdery and granular material supply device according to claim 3 or 4, wherein: 6. The felt-like member has at least two grease penetration holes formed at positions corresponding to the axial position of the grease supply passage provided in the seal box, and the grease supply passage is supplied from the grease supply passage. The powder and granular material supply device according to any one of claims 2 to 5, wherein grease is quickly penetrated into the inner peripheral surface of the felt-like member through the permeation hole. 7. The granular material supply device according to claim 1, wherein the granular material supply device is installed immediately below an outlet of a storage tank device that stores the granular material, A powder / granular material supply device, which is a screw conveyor device for continuously transferring the powder / granules taken out from the discharge port to a predetermined position.