JP2001348115A - Powder and grain screw conveyor with automatic air washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder and grain screw conveyor with an automatic air washer capable of automatically air washing the powder and grain attached to an inner wall face of a casing without applying the manual operation at all during conveying operation of the powder and grain. SOLUTION: Bearings 2a and 2b are mounted on left and right both ends of a main body casing 1, a rotary shaft 4 with a left hand blade 3 continuously spirally projected in an outer radial direction, is pivoted by the bearings, a geared motor 6 is connected to the outside of the bearing 2b, a rotary shaft 4 is rotated to spirally send the left hand blade 3 in the left direction, the rotary shaft 4 has a hollow pipe structure, shafts 7a and 7b for bearings are inserted into both ends of the rotary shaft 4, tip parts of the shafts 7a and 7b are rotatably held by the bearings 2a and 2b at left and right both ends of the main body casing 1, plural short slits 8 penetrating to the inside of the rotary shaft 4 are formed on an outside cylindrical face of the rotary shaft 4 of the left hand blade 3, and the shaft 7b for the bearing has a through hole K at its central part to be connected with a rotary one-touch union joint 9 mounted on the rotary shaft 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw conveyor for conveying various kinds of powder such as food particles, chemical particles, and chemical particles.

[0002]

2. Description of the Related Art Powdered raw materials include granulated sugar, glucose, skim milk powder, starch, rice bran, spices, cement, fly ash, carbon black, salt, detergent, wheat, rice, Maize, soybean, malt, silica sand, alumina oxide, titanium oxide, calcium carbonate, pulverized coal, lime, soda ash, food mix powder, wheat mix powder, soup powder, petrochemical powder, medicine, pigment, compound fertilizer, phenolic resin, Polyethylene resin, ABC resin,
There are a number of PVC powders, polypropylene powders, powder coatings and the like, and these are supplied to product manufacturers as powder raw materials or powder materials. These various powder materials are
After being manufactured by a manufacturing company, it is generally filled in bags or plastic containers and supplied to the market. For this reason, small and medium-sized factories use raw materials bags and plastic containers that are brought in by wagons or trucks as they are, but these are large-scale factories, which require enormous amounts of use. Because of the heavy labor, the technology of automatic conveyance of powder raw materials has already been put into practical use for the purpose of improving the working environment. The technology for automatic transfer of powdered raw materials is to store the raw materials from the lorry truck in the storage tank by air transfer, and then use a blower to transfer the raw material from the storage tank to the regular tank by air, It is transported to a temporary storage tank above the various powder and grain processing equipment and mixers by interposing a screw conveyor for transport.

[0003]

However, among the above prior arts, a screw conveyor for mechanically transporting various kinds of powders and granules is a rotary conveyor whose rotating blades rotate inside a cylindrical casing. Because of the structure for transporting various powders, a gap is formed between the tip of the rotating blade of the screw conveyor and the inner diameter of the casing. Therefore, it often occurs that various types of powders during the transport process adhere to and remain in the gaps. At this time, when the powders remaining on the inner diameter of the casing are foodstuffs, etc. In addition, the residual powder may corrode to cause various bacteria and pests. When such a phenomenon occurs, the deteriorated granular material remaining in the granular material of the foodstuff during the transport processing operation may be mixed, which not only deteriorates the quality of the granular material, but also is extremely preferable in terms of hygiene. It will not be. In addition, when powder particles accumulate on the inner wall surface of the casing, the clearance between the tip of the screw conveyor blade at the inner diameter becomes narrow, and in the worst case, the transport operation stops due to the contact of the screw conveyor blade tip. May be done. When such troubles occur,
In this type of conventional apparatus, the transport operation is temporarily stopped, and water washing is performed.To perform the water washing operation, all other devices connected to the screw conveyor are removed. Not only is it extremely labor-intensive because the workers perform the cleaning work, but even after the casing has been washed with water, it cannot be operated, including other connected processing machines, until the inside is completely dry. However, there has been a fatal problem for the entire plant, such as a decrease in the operation rate and a great deal of economic damage. Therefore, the present invention has been made in order to solve these problems, and the powder particles adhered to the inner wall surface of the casing during the transport operation of the powder particles are used for disassembling the apparatus or for human work. It is an object of the present invention to provide a screw conveyor for transferring powder and granules equipped with an automatic air cleaning device, which can automatically perform air cleaning without relying on anything.

[0004]

According to a first aspect of the present invention, there is provided a long cylindrical casing, wherein an opening is formed at a predetermined position in the casing, and various kinds of powdery and granular materials are formed. And a screw conveyor rotatably mounted in the longitudinal direction inside the casing, and an opening formed at a predetermined position in the casing, and the various powders conveyed by the screw conveyor. A powder discharge port for discharging the granules, and a motor for rotationally driving the screw conveyor, the rotary shaft of the screw conveyor having a hollow structure, and an outer diameter portion of the rotary shaft, A plurality of slits penetrating to the inside of the shaft are formed, and air can be blown out from the slits to clean the inside of the casing with air.
A screw conveyor for transferring powder and granules with an automatic air cleaning device, which is provided with a filter for suction-treating the air discharged from the slit.

[0005]

According to the first aspect of the present invention, first, the rotating shaft of the screw conveyor is driven to rotate by the motor. Next, when air cleaning is performed, air flows into the inner diameter portion of the rotary shaft of the screw conveyor and blows out from the slit of the rotary shaft, but since the rotary shaft of the screw conveyor is rotating at this time, the slit is The air released from the casing becomes a spiral tornado flow inside the casing, which rolls up the powder particles that have fallen to the bottom of the casing and makes it easier to transport with a screw conveyor, and the powder particles attached to the inner side wall and upper wall of the casing You will be flushing your body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a screw conveyor for transferring powder and granules with an automatic air cleaning device of the present invention is applied will be described with reference to the drawings. FIG. 1 is a front view showing the entirety of a screw conveyor according to an embodiment to which the present invention is applied, FIG. 2 is a partially cutaway enlarged view showing the internal structure of the screw conveyor of the embodiment, and FIG. FIG. 3 is a partially enlarged explanatory view showing the internal structure of the screw conveyor of FIG. As shown in FIG. 1, the screw conveyor according to the present embodiment includes bearings 2a and 2b at both left and right ends of a long cylindrical main body casing 1 having a circular cross section.
A rotating shaft in which left-handed blades 3 are continuously and spirally projected in the outer diameter direction inside the main body casing 1 through the bearings 2a and 2b at both ends as shown in FIG. 4 is rotatably mounted on the shaft. Among these, a geared motor 6 is connected to the outside of the bearing 2b via a frame 5. When the geared motor 6 is driven, the rotating shaft 4 rotates to move the left-handed blade 3 from the right to the left in the drawing. It is sent in a spiral form, and the operation of the screw conveyor is started. On the other hand, as shown in FIGS. 2 and 3, the rotary shaft 4 has a hollow pipe structure in order to minimize deflection due to its own weight, and has shafts 7a and 7b (round) for bearings at both ends. A processed rod.) The ends of the bearing shafts 7a, 7b are connected to the bearings 2a, 2 at the left and right ends of the main body casing 1.
It is held rotatably at b. Further, the outer surface of the rotating shaft 4 between the blades of the left-handed blades 3 that are continuously projecting in a spiral shape is set so as to be parallel to the inclination of the left-handed blades. A plurality of short slits 8 having a width of 0.2 mm to 0.4 mm are formed so as to penetrate to the hollow portion of the inner diameter portion of the rotating shaft 4. The slits 8 are formed at two locations opposing the outer diameter surface of the rotating shaft 4 so that the slits 8 can be rotated by 180 degrees at every pitch of each blade. Further, as shown in FIG. 3, the shaft 7b for a bearing inserted into one end of the rotary shaft 4 having a hollow structure has a through hole K formed at the center thereof, and the one end inserted into the rotary shaft 4 is connected to the shaft 7b. The other end of the rotary shaft 4 is connected to a rotary one-touch fitting 9 provided in the bearing 2b. A diaphragm solenoid valve 10, a high-pressure air accumulator tank 11, and a compressor 12 are connected to the rotary one-touch fitting 9. In addition, 13 shown in FIG. 1 is a powder supply port for dropping various powders, 14 is a filter for suctioning high-pressure air discharged from the slit 8 of the rotating shaft 4, and 15 is a suction duct for applying a negative pressure. , 16
Denotes an inspection hatch, 17 denotes a mounting base for installation in a factory, 18 denotes a joint of the main body casing 1, and 19 denotes a powder / particle discharge port for discharging various powder / particles transported by the screw conveyor.

Here, the operation and effect of the screw conveyor according to the present embodiment having the above-described configuration will be described. First,
A control panel (not shown) supplies a voltage to the geared motor 6 attached to the frame 5 and outputs a drive signal to the compressor 12. Then, the geared motor 6 is started to drive the rotary shaft 4 of the screw conveyor, and the screw conveyor moves the blade portion of the left-handed blade 3 projecting in a spiral shape to the geared motor 6.
It rotates so that it may be transported from the side to the filter 14 side.
Therefore, if various powders to be conveyed are dropped from the powder supply port 13 shown in FIG. 1, the powders are supplied by the feeding action of the left-handed blade 3 projecting spirally of the screw conveyor. Various powders dropped from the mouth 13 are filtered
It is sequentially conveyed in the side direction. Therefore, the diaphragm solenoid valve 10 is used in combination with the operation of the screw conveyor.
Is opened, the high-pressure air filled inside the high-pressure air accumulator tank 11 is pressurized and filled by the rotation of the rotary shaft 4 via the rotary one-touch fitting 9 and the bearing shaft 7 b by opening the diaphragm solenoid valve 10. At a high speed and blows out from each slit 8 into the interior of the main body casing 1. At this time, since the rotating shaft 4 is rotating, the high-pressure air ejected from each slit 8 is A spiral high-pressure fluid is generated inside 1 and a tornado flow is generated along the shape of the left-hand blade 3 projecting spirally of the screw conveyor, and this tornado flow is transmitted from the geared motor 6 side of the main body casing 1. It will flow toward the filter 14 side. By this operation, various powders and granules during the transport operation of the screw conveyor can be transported efficiently without remaining at the bottom of the main casing 1. The inside of the main body casing 1 of the screw conveyor during the operation of transporting various types of powders, particularly the portion of the inner wall surface and the upper inner wall to which the powder particles are likely to adhere is air-cleaned simultaneously with the transfer of the powder particles. From the inside of the casing 1 to the left-handed blade 3 of the left-handed blade 3 projecting helically from the screw conveyor, it is possible to always keep a clean state free from deposits. Since various powders and granules conveyed by the screw conveyor are fluidized and conveyed by tornado-shaped high-pressure air, constant supply and constant discharge are promoted. In the case where the various powders conveyed by the screw conveyor are mixed powders obtained by mixing a plurality of powders, it is possible to prevent the mixture from being separated during the conveyance and to improve the mixing state. The effects described above can now be obtained simply by unmanned automatic driving without resorting to artificial maintenance work. As a result, the screw conveyor of the present embodiment has an extremely large problem of the conventional screw conveyor device for transporting various powders, that is, powder inside the device which is inevitably generated in transporting various powders. Improving the workplace and working environment as well as dramatically improving economics and hygiene by solving the problem of internal contamination due to the adhesion of particles and the corrosion of attached particles at once. It is a revolutionary device that is useful. In the above-described embodiment, an example in which the left-handed blade 3 is applied to a general screw conveyor in which the left-handed blade 3 is continuously and spirally protruded in the outer diameter direction of the rotating shaft 4 has been described, but the present invention is not limited to this. Is not
For example, the same operation and effect as in the above-described embodiment can be achieved by using only the rotating shaft 4 in which the spiral left-hand blade 3 is removed from the rotating shaft 4.
The effect is obtained.

[0008]

As described above in detail, according to the screw conveyor for conveying powders with the automatic air cleaning device of the present invention, various powders during the conveyance operation of the screw conveyor remain at the bottom of the casing. It is possible to carry it efficiently without any trouble. In addition, since the inside of the casing of the screw conveyor during transport operation of various powders and granules, especially the part where the powders are likely to adhere on the inner side wall and the upper inner wall, is air-cleaned simultaneously with the transfer of the powders, the casing is From the inside to the blades of the screw conveyor, it is possible to always keep a clean state free from deposits. Furthermore, since various powders and granules conveyed by the screw conveyor are fluidized and conveyed by tornado-shaped air, constant supply and constant discharge are promoted. Furthermore, in the case where the various powders conveyed by the screw conveyor are mixed powders obtained by mixing a plurality of powders, it is possible to prevent separation of the mixture during the conveyance and to improve the mixing state. . I succeeded in obtaining a number of effects. Thus, the screw conveyor for conveying powder and granules with the automatic air cleaning device of the present invention is an extremely large problem of the conventional screw conveyor device for conveying various powders, that is, inevitably in transporting various powders and granules. Contamination due to powder particles inside the equipment
This is an epoch-making invention that solves the problem of internal pollution caused by the corrosion of attached powder and granules at once, which not only dramatically improves economy and hygiene, but also improves the workplace and working environment. However, the benefits of the industry to society as a whole are immense.

[Brief description of the drawings]

FIG. 1 is a front view showing an entire screw conveyor which is an embodiment to which the screw conveyor for transferring powder and granular materials with an automatic air cleaning device of the present invention is applied.

FIG. 2 is an enlarged view, partly broken away, showing the internal structure of the screw conveyor of the present embodiment.

FIG. 3 is a partially enlarged explanatory view showing an internal structure of the screw conveyor of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body casing 2a, 2b Bearing 3 Left-handed blade 4 Rotating shaft 5 Frame 6 Geared motor 7a, 7b Bearing shaft 8 Slit 9 Rotary one-touch fitting 10 Diaphragm solenoid valve 11 High-pressure air accumulator tank 12 Compressor 13 Powder supply port 14 Filter 15 Suction duct 16 Inspection hatch 17 Mounting base for factory installation 18 Joint 19 Powder discharge

Claims (1)

[Claims] 1. A long cylindrical casing, an opening formed at a predetermined position in the casing, a powder supply port for dropping various powders, and a rotatable inner longitudinal direction of the casing. A screw conveyor with a shaft attached thereto, an opening formed at a predetermined position of the casing, a powder discharge port for discharging the various powders transported by the screw conveyor, and a motor for rotating and driving the screw conveyor, A rotary shaft of the screw conveyor having a hollow structure, and a plurality of slits penetrating to the inside of the rotary shaft are formed in an outer diameter portion of the rotary shaft, and air is blown out from the slits to form the casing. The inside of the casing can be cleaned with air, and the casing is integrally provided with a filter for suction-treating the air released from the slit. Granular material conveying screw conveyors with moving air cleaning device.