JP6623134B2 - Powder supply device - Google Patents

Description

The present invention relates to a feeder of the powder can be continuously supplied powder accommodated in the hopper stably by quantitative.

  Conventionally, in water purification treatment and wastewater treatment, a method of filtering or removing turbid substances contained in raw water using a powdery flocculant is known. Specifically, water purification treatment and waste water treatment are performed by adding a solution containing a powdery flocculant to raw water to aggregate the colloidal particles to form floc.

As described above, when making a solution mixed with the flocculant, it is prepared by diluting the powdered flocculant with dilution water, etc., but a manufacturing apparatus for preparing this flocculant mixed solution Is a stirring tank for adding a flocculant and dilution water and stirring both, a rotation driving part for stirring the inside of the stirring tank, and a dilution flocculant added by rotating a powder flocculant It comprises a flocculant supply device which is a kind of powder supply device for supplying to the stirring layer.

The flocculant supply device has a swivel motor and a swivel arm, and the swivel arm is swung by the swivel motor so that the powdery flocculant stored in the hopper is continuously diluted by a fixed amount with a screw. It is the structure which supplies in the stirring tank containing water.

JP2013-173098A JP2008-229521

However, since the flocculant is highly hygroscopic and exhibits a strong viscosity when it absorbs moisture, only the flocculant riding on the screw portion is downward in the flocculant housed in the hopper member. As a result, the flocculant around the screw causes bridging. Therefore, the flocculant accommodated in the hopper member is in a state where a tunnel-like vertical hole is opened at the outer diameter of the screw. As a result, the flocculant around the screw cannot be sent downward, and the amount of flocculant charged into the dilution water stored in the stirring layer is reduced. Therefore, there has been a problem that it becomes impossible to supply a certain amount of the flocculant into the stirring layer, and it becomes difficult to produce a flocculant mixed solution having a constant concentration.

The present invention is intended to solve the conventional problems as described above, to provide a feeder of the powder can be continuously supplied to the powder accommodated in the hopper stably by quantitative For the purpose.

In order to achieve the above object, the invention according to claim 1 of the present application includes an upper hopper member having a tapered portion whose diameter decreases downward, and a hopper main body having a cylindrical member below the upper hopper member. A powder supply device having a rotary shaft installed in the hopper main body and extending in the vertical direction, and a screw on the rotary shaft, the rotary shaft rotating in a rotational direction with respect to a diametrical line segment in a plate-like vane which is disposed at an angle, the vane approaches the inner peripheral surface of the tapered portion of the from the approximated position with the outer diameter surface upper hopper member of the screw in the upper hopper member It is the structure which extended to the position .

  The invention according to claim 2 of the present application is characterized in that an outer angle in a rotation direction with respect to a line segment in a diameter direction of the rotation shaft of the blade attached to the rotation shaft is 10 ° to 40 °.

In the invention according to claim 3 of the present application, an inverted U-shaped breaker extending obliquely in the vertical direction along the inner peripheral surface of the tapered portion of the upper hopper member is provided on the rotating shaft side. The end portion of the inner breaker portion that is positioned and extends obliquely upward is fixedly installed, and the outer breaker portion that is located outside the inner breaker portion and extends obliquely downward is close to the inner peripheral surface of the taper portion. And it was set as the structure extended along the internal peripheral surface.

  The invention according to claim 4 of the present application is characterized in that the rotation locus of the breaker is positioned above the rotation locus of the blades, and the invention according to claim 5 of the present application is the hopper body. A liner having an inner diameter slightly larger than the outer diameter of the screw is installed inside the cylindrical member, and the inner peripheral surface of the liner communicates with a gap between the inner surface of the liner and the outer diameter surface of the screw. A spiral groove is provided.

  Further, in the invention according to claim 6 of the present application, a lower hopper member provided with a brush protruding toward the center is connected to a lower portion of the cylindrical member of the hopper body, and a brush portion provided at a tip of the brush is provided. The hopper body is installed in contact with the screw protruding from the cylindrical member of the hopper body into the lower hopper member.

As described above, according to the first aspect of the present invention, the screw and the blade installed on the rotating shaft rotate in the same direction as the rotating shaft rotates, and the powder contained in the upper hopper member of the hopper body is obtained. Thus, the powder around the rotating shaft is placed on a screw and transferred toward the lower cylindrical member. On the other hand, since the blades are installed at an angle in the rotational direction with respect to the diametrical line segment of the rotating shaft, the powder on the inner peripheral surface portion of the tapered portion located away from the rotating shaft Also, it is extruded in the direction of the rotation axis together with the powder at a position close to the rotation axis, and is forcibly placed on the screw and transferred to the lower cylindrical member. Therefore, the occurrence of a situation in which the powder around the screw causes a bridge and a tunnel-like hole is opened at the outer diameter of the screw and cannot be transferred downward is avoided.

Further, the invention according to claim 2, since the external angle of the direction of rotation is installed at 10 ° to 40 ° with respect to the rotation axis of the diametrical direction of the line segment of the blade attached to the rotating shaft, flour In the case of a body property, for example, a powder containing a lot of moisture or a powder having a high viscosity, the attachment angle of the blade is increased. On the contrary, in the case of a powder having a low viscosity, the attachment angle is reduced. Thus, by changing the blade mounting angle, the pushing force in the direction of the rotation axis applied to the powder can be adjusted, and the powder can be efficiently gathered in the screw direction.

Further, the invention according to claim 3, since the external angle of the direction of rotation is installed at 10 ° to 40 ° with respect to the rotation axis of the diametrical direction of the line segment of the blade attached to the rotating shaft, flour In the case of a body property, for example, a powder containing a lot of moisture or a powder having a high viscosity, the attachment angle of the blade is increased. On the contrary, in the case of a powder having a low viscosity, the attachment angle is reduced. Thus, by changing the blade mounting angle, the pushing force in the direction of the rotation axis applied to the powder can be adjusted, and the powder can be efficiently gathered in the screw direction.

Further, according to the invention according to claim 4, since the rotation locus of the breaker is positioned above the rotation locus of the blades, the breaker rotates so that the breaker is in the tapered portion of the upper hopper member. The powder located above is first loosened, and the loosened powder is fed into the blade portion located below. By rotating the blades, the powder loosened beforehand by the breaker can be smoothly fed in the direction of the rotation axis, and the powder can be easily transferred downward by a screw.

According to the invention of claim 5, a liner having an inner diameter slightly larger than the outer diameter of the screw is installed inside the cylindrical member of the hopper body, and the inner surface of the liner is disposed on the inner peripheral surface of the liner. And a screw groove that communicates with the clearance between the outer diameter surface of the screw and the screw, the powder that has been fed into the cylindrical member from the tapered portion of the upper hopper member. A part passes through the gap and enters the spiral groove, and the powder in the groove is placed on a screw and transferred to the lower side of the cylindrical member. Therefore, powder does not adhere to the inner peripheral surface of the liner, the gap is maintained, and the occurrence of a situation where the screw stops rotating is avoided.

  According to the invention of claim 6, a lower hopper member provided with a brush protruding toward the center is connected to a lower portion of the cylindrical member of the hopper body, and a brush portion provided at a tip of the brush is provided. The hopper body is installed in contact with the screw protruding from the cylindrical member of the hopper body into the lower hopper member. As a result, the powder transferred on the screw and transferred into the lower hopper member is scraped off by the brush portion at the tip of the brush as the screw rotates, and a predetermined amount set in advance by the number of rotations of the screw. The entire amount of the powder can be supplied to other devices and the like.

It is a longitudinal cross-sectional front view of the powder supply apparatus which concerns on this invention. It is an expanded sectional front view of the upper hopper part of the powder supply apparatus concerning the present invention. It is an expanded sectional side view of the upper hopper part of the powder supply apparatus concerning the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is an expanded sectional front view of the cylindrical member part of the powder supply apparatus which concerns on this invention. FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. It is the DD sectional view taken on the line in FIG.

Hereinafter, the powder supply apparatus according to the present invention will be described with reference to the embodiments shown in the drawings. In the figure, reference numeral 1 denotes a hopper body, which is composed of an upper hopper member 2 having a tapered portion 3 whose diameter decreases downward, and a cylindrical member 4 connected to the lower portion of the upper hopper member 2. Reference numeral 5 denotes a rotating shaft installed inside the hopper body 1, which extends in the vertical direction in the upper hopper member 2 and the cylindrical member 4, and 6 denotes a screw installed on the rotating shaft 5.

  Reference numeral 7 denotes a blade attached to the rotary shaft 5, which is installed with a predetermined angle θ in the rotational direction R with respect to a line segment L in the diameter direction of the rotary shaft 5, and is formed by a plate-like member The outer end edge 7 a of 7 extends to a position close to the inner peripheral surface 3 a of the tapered portion 3. The outer end edge 7a of the blade 7 extends to a position close to the inner peripheral surface 3a of the taper part 3, so that it is in the taper part 3 and away from the rotating shaft 5, that is, the inner periphery of the taper part 3 The powder staying in the place close to the surface 3a can be surely pushed out in the direction of the rotary shaft 5 and the screw 6, and uniform fluidization of the entire powder stored in the taper portion 3 is achieved.

Further, the mounting angle θ of the rotary shaft 5 of the blade 7, the external angle of the rotational direction R with respect to the diameter direction of the line segment L of the rotary shaft 5 is installed at 10 ° to 40 °, powder properties of For example, the attachment angle θ of the blade 7 is increased in the case of powder containing a lot of moisture or the powder having high viscosity, and the attachment angle θ is decreased in the case of powder having low viscosity. For example, in a flocculant that has high hygroscopicity and has a strong viscosity when it contains water, good results were obtained by setting the attachment angle (outside angle) θ of the blades 7 to 30 °. In this way, by changing the mounting angle θ of the blades 7, the pushing force in the direction of the rotary shaft 5 given to the powder can be adjusted, and the powder can be efficiently gathered in the direction of the screw 6.

  In the present embodiment shown in the drawings, the blade 7 is bent at a predetermined angle θ on the side of the base to be attached to the rotary shaft 5 and the bent portion to the outer edge 7a are formed by a straight flat plate portion. However, it is also possible to form the flat plate portion with a circular arc portion in the rotation direction R. By adopting such a configuration, the powder at a position far from the rotation shaft 5 can be moved toward the rotation shaft 5 and the screw 6 at a speed with a small difference from the powder at a near position.

  Reference numeral 8 denotes an inverted U-shaped breaker attached to the rotating shaft 5, which is in the tapered portion 3 of the upper hopper member 2 and extends obliquely up and down along the inner peripheral surface 3 a, and is positioned on the rotating shaft 5 side It is installed by fixing the end of the inner breaker portion 8 a to the rotating shaft 5. 8b is an outer breaker portion located outside the inner breaker portion 8a, and extends obliquely downward along the inner peripheral surface 3a at a position close to the inner peripheral surface 3a of the tapered portion 3. By adopting such a configuration, it is possible to surely loosen the powder located in the upper hopper member 2 and at a location close to the rotary shaft 5 and a location away from the rotary shaft 5. The whole powder is fluidized.

The breaker 8 is installed on the side opposite to the position where the blade 7 is attached to the rotary shaft 5 and above the position where the blade 7 is installed. By adopting such a configuration, the powder located in the upper hopper member 2 and located above the blades 7 is loosened by the rotation trajectory of the breaker 8, and the loosened powder is located in the lower blade 7. Will be moved to. Therefore, the powder around the blades 7 is loosened, and the powder is easily pushed out in the direction of the rotary shaft 5 by the rotation locus of the blades 7, and fluidization in the direction of the screw 6 is improved.

  Reference numeral 9 denotes a liner installed inside the cylindrical member 4 of the hopper body 1, and a vertical hole having an inner diameter slightly larger than the outer diameter of the screw 6 is provided at the center, and an inner peripheral surface 9 a of the liner 9 is spirally formed. The concave groove 10 is formed. Reference numeral 11 denotes a gap between the outer diameter surface 6 a of the screw 6 and the inner peripheral surface 9 a of the liner 9, and the gap 11 and the spiral groove 10 communicate with each other over the entire length of the cylindrical member 4. As a result, most of the powder in the hopper main body 1 rides on the screw 6 and is carried in the direction of the lower cylindrical member 4, but part of the powder is part of the outer diameter surface 6 a of the screw 6 and the inner periphery of the liner 9. The spiral groove 10 enters the spiral groove 10 through the gap 11 with the surface 9 a, travels from the groove 10 to the lower groove 10 through the lower gap 11, and is carried below the cylindrical member 4.

  While the powder moves from the gap 11 into the spiral groove 10, the powder is cut by the peripheral blade of the screw 6 at the gap 11, and at the same time, from the narrow gap (gap 11) to the wide gap below ( Therefore, the powder does not stay in the gap 11 and the gap 11 is held. As a result, the screw 6 can smoothly rotate in the inner peripheral surface 9a of the liner 9, and the powder on the screw 6 can be reliably sent downward.

12 is a bottom hopper member, in the said hopper body 1 is obtained by connecting the lower portion of the cylindrical member 4, a brush 13 protruding toward the center is a plurality of installed in the peripheral wall of the lower portion hopper member 12 . A brush portion 13 a is provided at the tip of the brush 13, and the brush portion 13 a is installed in contact with the screw 6 that protrudes into the lower hopper member 12 through the cylindrical member 4 of the hopper body 1. Thereby, the powder carried on the screw 6 into the lower hopper member 12 is scraped off by the brush portion 13a at the tip of the brush as the screw 6 rotates, and is preset by the number of rotations of the screw 6. The entire amount can be supplied to other devices without leaving a predetermined amount of powder.

Next, the operation of the powder supply apparatus according to the present invention will be described. In FIG. 1, the handle 16 of the hopper main body 1 is turned to open the opening / closing lid 15, and the powder is charged through the opening 14 which is opened. Housed in 1. Thereafter, the opening 14 is closed with the opening / closing lid 15, and the handle 16 is turned to fix the opening / closing lid 15 to the opening of the opening 14. Next, the motor is driven to rotate the rotating shaft 5 and the screw 6 installed on the rotating shaft 5 in the right direction (rotating direction R), and the breaker 8 and the blade 7 installed on the rotating shaft 5 are rotated in the same direction. Let

  The powder stored in the hopper body 1 is first loosened by the rotation trajectory of the breaker 8 at the upper part of the upper hopper member 2. Next, the powder loosened by the breaker 8 is in the upper hopper member 2 and is pushed out toward the rotary shaft 5 by the blades 7 at the position of the taper portion 3 and placed on the screw 6 installed on the rotary shaft 5. Then, it is transferred from the lower end of the tapered portion 3 toward the cylindrical member 4.

  Most of the powder transferred from the lower end of the taper portion 3 to the upper end of the cylindrical member 4 is carried on the screw 6 and transferred into the lower hopper member 12 below. During this time, a part of the powder is screwed. 6 enters the spiral concave groove 10 through a gap 11 formed between the outer diameter surface 6a of the liner 6 and the inner peripheral surface 9a of the liner 9, and enters the lower groove 10 from the concave groove 10 through the lower gap 11. It repeats the flow of entering and is carried below the cylindrical member 4.

While the powder moves from the gap 11 into the spiral groove 10, the powder is cut by the peripheral edge of the screw 6 at the gap 11, and at the same time, the lower comparison is made from the upper narrow space (gap 11). Flow down into a large space (concave groove 10). Both the concave groove part in the 10 is conveyed below the cylindrical member 4 is placed on the screw 6, the remainder in the lower hopper member 12 flows down to the lower concave groove 10 through the gap 11 Be transported.

The powder carried on the screw 6 into the lower hopper member 12 is scraped off by the brush portion 13a at the tip of the brush 13 as the screw 6 rotates, and is set in advance according to the rotational speed of the screw 6. The entire amount of the fixed amount of powder is sent to other devices.

DESCRIPTION OF SYMBOLS 1 Hopper main body 2 Upper hopper member 3 Tapered part 3a Inner peripheral surface 4 Cylindrical member 5 Rotating shaft L Diameter direction line segment
R Rotating direction θ Mounting angle 6 Screw 6a Outer diameter surface 7 Blade 7a Outer edge 8 Breaker 8a Inner breaker portion 8b Outer breaker portion 9 Liner 9a Inner peripheral surface 10 Spiral groove 11 Clearance 12 Lower hopper member 13 Brush 13a Brush Part

Claims (6)

An upper hopper member having a tapered portion whose diameter decreases downward, a hopper body having a cylindrical member at a lower portion of the upper hopper member, a vertically extending rotary shaft installed inside the hopper body, A powder supply apparatus including a screw on a rotating shaft, the rotating shaft including a plate-shaped blade installed at an angle in a rotating direction with respect to a diametrical line segment, the blade being The powder supply apparatus characterized in that the upper hopper member extends from a position close to the outer diameter surface of the screw to a position close to the inner peripheral surface of the tapered portion of the upper hopper member. . 2. The powder supply apparatus according to claim 1, wherein an outer angle of the blade attached to the rotating shaft in a rotating direction with respect to a line segment in a diameter direction of the rotating shaft is 10 ° to 40 °. An inverted U-shaped breaker extending obliquely in the vertical direction along the inner peripheral surface of the tapered portion of the upper hopper member is disposed on the rotation shaft. And a configuration in which an outer breaker portion that is located outside the inner breaker portion and extends obliquely downward extends at a position close to the inner peripheral surface of the tapered portion and along the inner peripheral surface. The powder supply apparatus according to claim 1 or 2, wherein 4. The powder supply apparatus according to claim 3, wherein a rotation locus of the breaker is positioned above the rotation locus of the blades. A liner having an inner diameter slightly larger than the outer diameter of the screw is installed inside the cylindrical member of the hopper body, and a gap between the inner surface of the liner and the outer diameter surface of the screw is provided on the inner peripheral surface of the liner. The powder supply apparatus according to any one of claims 1 to 4, further comprising a spiral groove that communicates with the groove. A lower hopper member having a brush protruding toward the center is connected to a lower portion of the cylindrical member of the hopper body, and a brush portion provided at a tip of the brush is connected to the lower hopper member from within the cylindrical member of the hopper body. The powder supply apparatus according to any one of claims 1 to 5, wherein the powder supply apparatus is installed in contact with the screw projecting inward.

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