JP7089395B2 - Granule supply device - Google Patents

Description

The present invention relates to a powder or granular material supply device, and particularly to a powder or granular material supply device suitable for quantitatively supplying powder or granular material.

A powder or granular material supply device, which is also called a feeder, for supplying a fixed amount of powder or granular material is already widely known. This type of powder or granular material supply device includes a hopper into which the powder or granular material is input, a discharge section having a screw for discharging the powder or granular material, and a chute for guiding the powder or granular material descending from the hopper to the discharge section. It is equipped with a stirring member having a stirring member and a driving motor for stirring the powder and granular materials inside the chute and the hopper, a measuring unit on which the stirring member is placed, a control unit, and the like. Then, at the same time as discharging the powder and granules from the discharge part, the weight value of the hopper, chute, discharge part, etc. including the weight value of the stored powder and granules is measured to reduce the weight value (powder and granules). By measuring the discharge weight) and controlling (adjusting) the screw rotation speed of the discharge unit, it is possible to discharge so that the discharge weight per hour (that is, the discharge amount) becomes constant.

In this type of powder or granular material supply device, as shown in FIGS. 10 to 12, the chute 103 that guides the powder or granular material descending from the hopper 101 to the discharge portion 102 is inclined with its inner surface facing diagonally upward. An inclined surface 103a and a conical wall surface 103b extending in a conical shape from the outer periphery of the inclined surface 103a are provided, and an axial center in which the stirring member 104 projects in a state of being inclined diagonally upward from the inclined surface 103a of the chute 103. Patent Document 1 discloses a configuration that rotates about the portion 105. The powder or granular material supply device is provided with a connection opening 106 for connecting the bottom of the chute 103 and the discharge portion 102, and the stirring member 104 is formed so as to extend radially around the axial center portion 105. .. As shown in FIGS. 11 and 12, the connection opening 106 is linearly provided along the conical wall surface 103b at the bottom of the chute 103 so as to extend in the radial direction of the stirring member 104, and the powder or granular material is provided at the discharge portion 102. The screw 107 for discharging the above is also arranged so as to extend along the connection opening 106. Note that 108 in FIGS. 10 to 12 is a measuring unit, and 110 in FIG. 12 is a motor for rotating the stirring member 104 and the screw 107 via the gears 111 and 112.

According to this powder / granular material supply device, the stirring member 104 rotates along the inclined surface 103a and the conical wall portion 103b of the chute 103, so that the powder / granular material moves in various directions of the vertical direction and the circumferential direction. Since it is agitated well, it is possible to prevent the occurrence of bridges in the chute 103 and the hopper 101 extremely well.

Japanese Unexamined Patent Publication No. 2013-139333

However, according to the conventional powder or granular material supply device described above, the connection opening 106 that sends out the powder or granular material from the chute 103 to the discharge portion 102 is radially along the conical wall surface 103b at the bottom of the chute 103. Since the chute 103 of the powder or granular material supply device is small, the dimension (length) L1 of the connection opening 106 cannot be made too large because it is provided in a straight line so as to extend to the connection opening. It becomes difficult to secure a sufficient size as the portion 106, and there is a possibility that the powder or granular material cannot be satisfactorily delivered to the discharge portion 102.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a powder or granular material supply device and a powder or granular material supply equipment capable of ensuring a sufficient size as a connection opening even when the chute is small. Is to be.

In order to solve the above problems, the powder or granular material supply device of the present invention has a hopper into which the powder or granular material is charged, a discharge unit for discharging the powder or granular material by a screw, and a powder or granular material discharged from the hopper. A powder or granular material supply device including a chute leading to a portion and a stirring portion in which a stirring member rotates in the chute. A conical wall portion extending in a conical shape from the outer periphery of the inclined surface is provided, and the stirring member is an inclined surface of the chute centered on an axial center portion protruding diagonally upward from the inclined surface of the chute. And, it is arranged in a posture of rotating along the inner surface of the conical wall portion, and the connection opening following the discharge portion is provided to the chute along the rotation tangential direction of the stirring member passing through the bottom of the chute, and the lower end of the conical wall portion. A screw provided in the portion and discharging the powder or granular material at the discharge portion is arranged so as to extend along the connection opening.

According to this configuration, by providing the connection opening following the discharge portion along the rotation tangential direction of the stirring member passing through the bottom of the chute, the chute is sufficiently large (sufficient) as the connection opening even when the chute is small. The length) can be secured by extending it along the rotation direction of the stirring member, and as a result, the powder or granular material can be satisfactorily sent out from the discharge portion.

Further, it is preferable to rotate the stirring member in the same direction as the discharge direction by the screw. According to this configuration, even if the powder or granular material to be supplied is a particle having a relatively large particle size, the particle body can be formed. It is not caught between the stirring member and the screw and does not crack, and can be discharged satisfactorily. That is, when the powder or granular material to be supplied is a relatively large granular material and the stirring member is rotated in the direction opposite to the discharge direction by the screw, the granular material is between the stirring member and the screw. If the stirring member is rotated in the same direction as the discharge direction by the screw as in this configuration, it is possible to prevent such a problem from occurring. Further, by rotating the stirring member in the same direction as the discharging direction by the screw, there is an advantage that the powder or granular material can be supplied to the discharging portion while being better pushed by the rotational force of the stirring member.

Further, the powder or granular material supply devices are provided so as to be paired, and the paired powder or granular material supply devices are in a posture in which the sides of these powder or granular material supply devices on which the inclined surface of the chute is not formed face each other and approach each other. It may be arranged with. Further, in this case, the replenishment device for alternately replenishing the powder or granular material to one of the powder or granular material supply devices of the paired powder or granular material supply device and the discharge unit of the paired powder or granular material supply device are discharged. It is equipped with an on-off valve that can prevent the powder or granular material from coming out from the discharge part by making it possible to position the outlet opening of the cylinder at the position where it is selectively opened and closed and the intermediate position, and it is a pair of these. It is preferable to switch the supply of the powder or granular material from the powder or granular material supply device so that the powder or granular material is continuously supplied.

According to the present invention, the chute is provided with an inclined surface whose inner surface is inclined diagonally upward, and the stirring member is centered on an axial center portion protruding in a state of being inclined diagonally upward from the inclined surface of the chute. A screw that discharges powder or granular material at the discharge portion is provided in the chute with a connection opening that follows the discharge portion along the rotation tangential direction of the stirring member that passes through the bottom of the chute. By arranging it so as to extend along the connection opening, even when the chute is small, a sufficient size (sufficient length) as the connection opening can be extended along the rotation direction of the stirring member. As a result, the powder or granular material can be satisfactorily sent out from the discharge portion, and the reliability can be improved.

Further, by rotating the stirring member in the same direction as the discharge direction by the screw, even if the particles of the powder or granular material to be supplied are relatively large particles, the granules are between the stirring member and the screw. Since it is not pinched and cracked and can be discharged satisfactorily, reliability can be improved. Further, there is an advantage that the powder or granular material can be satisfactorily supplied to the discharge portion while being pushed more satisfactorily by the rotational force of the stirring member.

It is a front view of the powder / granular material supply device which concerns on embodiment of this invention. It is a top view of the same powder or granular material supply device. It is a side view of the same powder or granular material supply device. It is a front view of the powder / granular material supply equipment provided with two powder / granular material supply devices. It is a top view of the powder and granular material supply equipment. It is a side view of the same powder or granular material supply equipment. It is a front view of the powder / granular material supply equipment provided with two powder / granular material supply devices according to another embodiment of the present invention. It is a top view of the powder and granular material supply equipment. It is a side view of the same powder or granular material supply equipment. It is a front view of the conventional powder or granular material supply device. It is a side view of the conventional powder or granular material supply device. It is a top view of the conventional powder or granular material supply device.

Hereinafter, the powder or granular material supply device according to the embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the powder or granular material supply device 10 according to the embodiment of the present invention includes a hopper 1 into which the powder or granular material is charged, and a discharge unit 2 for discharging the powder or granular material by a screw 2b. The chute 3 that guides the powder or granular material that has fallen from the hopper 1 to the discharge unit 2, the stirring unit 4 that stirs the powder or granular material in the chute 3 by the stirring member 4b that rotates inside the chute 3, and the hopper 1. A measuring unit 5 that is arranged below the chute 3 and the discharging unit 2 and measures the powder or granular material while supporting the hopper 1, the chute 3 and the discharging unit 2 is provided. Then, at the same time as discharging the powder or granular material from the discharging unit 2, the weight value of the hopper 1, the chute 3, the discharging unit 2, etc. including the weight value of the stored powder or granular material is measured to reduce the weight value. By measuring (emission weight of powder or granular material) and controlling (adjusting) the screw rotation speed of the discharge unit 2, it is possible to discharge so that the discharge weight per hour (that is, the discharge amount) becomes constant. There is. In this embodiment, the measuring unit 5 is assembled on a horizontally arranged horizontal support base 6.

As shown in FIGS. 1 to 3, the upper ends of the hopper 1 and the chute 3 are circular in a plan view and have the same cross-sectional shape in the vertical direction, that is, a straight cylinder type circular shape, and the lower rear surface side of the chute 3 is formed. (That is, one side of the lower part of the storage portion 2) is formed with an inclined surface 3a that is inclined so that its inner surface side faces diagonally upward (that is, it is inclined toward the front toward the lower side). 3a is configured to guide the powder or granular material to the discharge portion 2 in a shape in which the cross-sectional area of the flow path into which the powder or granular material flows becomes smaller toward the lower side. Further, a side wall portion 3c is formed on the upper portion of the chute 3, and a conical trapezoidal shape that extends diagonally upward from the outer periphery of the inclined surface 3a of the chute 3 between the side wall portion 3c and the inclined surface 3a. Conical wall portion 3b is formed. In this powder or granular material supply device 10, as shown in FIGS. 1 and 3, the lower side of the side wall portion 3c of the chute 3 is widened in the width direction, and the lower side is formed in a cross-sectional shape larger than the upper side. As shown in FIG. 1, when viewed from the side, the side wall portion 3c at the front end and the side wall portion 3c at the rear end are formed substantially straight in the vertical direction, and these side wall portions 3c are gentle in the circumferential direction and the vertical direction. It is formed in a shape that leads to.

As shown in FIG. 1, the stirring unit 4 is rotated by a stirring motor 4c with a speed reduction mechanism in which a stirring member 4b composed of a stirring blade is mounted on the outside of an inclined surface 3a around an axis center portion 4a. In the embodiment, the axial center portion 4a of the stirring portion 4 is arranged so as to project toward the inner center of the chute 3 at right angles to the inclined surface 3a. Further, as shown in FIGS. 1 to 3, the stirring member 4b is bent so as to extend in both sides in the radial direction from the axial center portion 4a along the conical wall portion 3b and to incline inward from both ends thereof. A portion along the conical wall portion 3b of the chute 3 is provided. Then, the stirring member 4b of the stirring portion 4 rotates along the inclined surface 3a and the conical wall portion 3b of the chute 3, so that the powder or granular material is moved in various directions of the vertical direction and the circumferential direction, and the stirring member 4b is satisfactorily moved. It is agitated so that the occurrence of bridges in the chute 3 and the hopper 1 can be prevented extremely well.

As shown in FIGS. 2 and 3, a connection opening 3d connected to the discharge portion 2 is formed at the bottom portion of the chute 3 (the lower end portion of the chute 3 and the portion near the lower end portion). Here, the connection opening 3d is along the rotational tangential direction of the stirring member 4 passing through the bottom of the chute 3 (that is, the tangential direction B in contact with the circumferential direction A in which the stirring member 4 rotates, as shown in FIG. 2). It is provided. Further, the discharge portion 2 has a vertical cross section, a long glasses shape in the horizontal direction, or a substantially cylindrical shape, and is rotated around the rotation shaft 2d inside the discharge cylinder 2a and the screw casing 2c that extend linearly. A biaxial or uniaxial screw 2b (in FIGS. 1 and 2 shows a case where the screw 2b is a biaxial type) for discharging the body is arranged. The screw 2b that discharges the powder or granular material in the discharge portion 2 is arranged so as to extend along the connection opening 3d of the chute 3.

That is, the powder and granules from the chute 3 are guided into the discharge section 2 through the connection opening 3d, and as shown in FIG. 2, the connection opening 3d (and the supply direction by the screw 2b) is the cone of the chute 3. A direction extending from the lower end of the wall portion 3b along the rotational tangential direction B of the stirring member 4 (this direction is a direction in contact with the outer periphery of the inclined surface 3a of the chute 3 and the outer periphery of the conical wall portion 3b as shown in FIG. 2). ) Is formed so as to extend along. Further, as shown in FIG. 3, the lower end portion of the conical wall portion 3b of the chute 3 and the portion in the vicinity thereof are opened so as to overlap the discharge portion 2 (specifically, the space inside the screw casing 3c) when viewed from the side. Is located in.

Then, as described above, the screw 2b extends below the connection opening 3d along the connection opening 3d, that is, in a plan view as shown in FIG. 2 or in a side view as shown in FIG. In a sluggish state, the axis of rotation of the screw 2b passes through the lower part of the connection opening 3d formed at the bottom of the chute 12 (specifically, the lower end of the conical wall 3b), and from this lower end. , It is arranged so as to extend in a direction extending along the rotation tangential direction B of the stirring member 4 (also in a direction parallel to the tangent line in contact with the outer periphery of the inclined surface 3a of the chute 3).

As shown in FIGS. 2 and 3, the screw 2b is driven by a screw motor 2g with a speed reducer assembled behind the screw casing 2c. Further, although not shown, the powder or granular material supply device 10 is also provided with a control unit or the like, and it is possible to adjust the rotation speed of the stirring member 4b and the rotation speed of the screw 2b. It is configured to be rotated in the same direction (same delivery direction) E as the discharge direction D by the screw 2b. Further, a discharge outlet cylinder 2f in which a discharge outlet 2e that opens downward is formed is connected to the tip end portion of the discharge cylinder 2a, and the powder or granular material sent out by the screw 2b is downward (outside) from the discharge outlet cylinder 2f. Is discharged to.

According to the above configuration, the chute 3 and the discharge portion 2 are provided by providing a connection opening 3d that continues from the inside of the chute 3 to the discharge portion 2 along the rotational tangential direction of the stirring member 4 that passes through the bottom of the chute 3. It is connected in a relatively large area (especially in the long dimension range C, as shown in FIG. 2). Therefore, even when the chute 3 has a small capacity (small size), a sufficient size (sufficient length) as the connection opening 3d is extended along the rotation direction (circumferential direction) of the stirring member 4. As a result, the powder or granular material can be satisfactorily sent out from the discharge unit 2, and the reliability of the powder or granular material supply device 10 can be improved.

Further, according to the above configuration, since the stirring member 4b is configured to be rotated in the same direction as the discharge direction by the screw 2b, the powder or granular material to be supplied is a particle having a relatively large particle size. However, the granules do not get caught between the stirring member 4b and the screw 2b and crack, and can be discharged satisfactorily. That is, when the powder or granular material to be supplied is a relatively large granular material and the stirring member 4b is rotated in the direction opposite to the discharge direction by the screw 2b, the granular material becomes the stirring member 4b and the screw. A problem of being caught between the screw and the 2b and cracking may occur, but if the stirring member 4b is rotated in the same direction as the discharge direction of the screw 2b as in this configuration, the occurrence of such a problem can be prevented.

Further, when the stirring member 4b is rotated in the direction opposite to the discharge direction by the screw 2b, the inside of the screw casing 2c is pushed from the inside of the chute 3 through the connection opening 3d in the direction opposite to the discharge direction of the screw 2b. It becomes a resistance when the powder or granular material is sent out by the screw 2b, and a larger driving force is required for the screw motor 2g, which may increase the electricity bill or decrease the discharge capacity (supply capacity) by the screw 2b. be. However, according to the above configuration, the stirring member 4b is rotated in the same direction as the discharge direction by the screw 2b, so that the powder or granular material is satisfactorily pushed into the screw casing 2c without resistance, so that the screw motor 2g is driven. The electricity bill does not increase, and the screw 2b can be discharged (supplied) satisfactorily while fully exhibiting the discharging capacity (supplying capacity).

In the above embodiment, the case where the powder or granular material supply device 10 is provided as a single unit has been described, but the present invention is not limited to this, and as shown in FIGS. 4 to 6, the powder or granular material of the above embodiment is provided. Two body supply devices 10 may be arranged side by side to form the powder or granular material supply facility 15. In this case, the side of the chute 3 in these powder or granular material supply devices 10 on which the inclined surface 3a is not formed may be arranged so as to face each other and approach each other. In this embodiment, each powder or granular material supply device 10 can be discharged while weighing different types of powder or granular material, and the discharge unit 2 is provided with a discharge outlet cylinder 2c. However, the powder or granular material is configured to be directly discharged from the discharge cylinder 2a, but the present invention is not limited to this, and the discharge outlet cylinder 2c may be provided.

In this way, by adopting a configuration in which the paired powder or granular material supply devices 10 are arranged in such a posture that the sides of the chute 3 on which the inclined surface 3a is not formed face each other and approach each other, the powder or granular material supply device It becomes easy to arrange the discharge units 2 for discharging the powder or granular material 10 close to each other, and it is possible to reduce the installation space of the paired powder or granular material supply device 10.

That is, in the powder or granular material supply device 10, a connection opening 3d following the discharge portion 2 is provided in the chute 3 along the rotational tangential direction of the stirring member 4 passing through the bottom of the chute 3, and the powder or granular material 2 is provided in the discharge portion 2. Since the screw 2b for discharging the body is arranged so as to extend along the connection opening 3d, the side of the powder or granular material supply device 10 to be paired with the chute 3 on which the inclined surface 3a is not formed faces each other. It becomes easier to arrange the powder in an approaching posture, and even when the powder or granular material is arranged in this way, the powder or granular material can be satisfactorily discharged (supplied).

Further, as described above, by using the powder / granular material supply device 10 paired with the two units, the supply of the powder / granular material from the powder / granular material supply device 10 in the pair is switched. It may be configured to continuously supply the powder or granular material. Then, in this case, while the powder or granular material is discharged from the discharge unit 2 of one of the powder or granular material supply device 10 of the paired powder or granular material supply device 10, the other powder or granular material supply device is discharged. It may be configured so that the replenishment operation to 10 can be completed.

In this case, as shown in FIGS. 7 to 9, in the powder or granular material supply equipment 15 provided with the powder or granular material supply device 10 paired with each other, the hopper 1 of each powder or granular material supply device 10 is used. A replenishment device 11 for replenishing the powder or granular material is provided, and an discharge outlet cylinder 2f or the like for supplying (discharging) the powder or granular material discharged from the discharge unit 2 of each powder or granular material supply device 10 together is provided.

As shown briefly in FIG. 7, the supply device 11 for supplying the powder or granular material to the hopper 1 of each powder or granular material supply device 10 is for a pair (that is, two) powder or granular material supply devices 10. Only one is installed. Then, a branch supply path 12 whose downstream side is bifurcated is connected to the supply port 11a of the supply device 11, and the branch outlet 12a of the branch supply path 12 is connected to the supply port 1b of the powder or granular material supply device 10, respectively. ing. The branch portion 12b of the branch supply path 12 is provided with a switching valve 13 as a switching means for switching the supply route of the powder or granular material from the supply device 11 to each powder or granular material supply device 10. Although not shown, the replenishment device 11, the branch supply path 12, and the switching valve 13 are supported by a separate support member or the like so that the weight does not act on the measuring unit 5, and are connected by a telescopic connection cover 14 or the like. Let me. The switching valve 13 is driven by a driving means such as a motor, a solenoid valve, or a cylinder operated by compressed air, but is omitted in the drawings.

Further, a discharge outlet cylinder 2f having a discharge outlet 2e that opens downward is connected to the tip end portion of the discharge cylinder 2a. Inside the discharge outlet cylinder 2f, the outlet opening of the discharge cylinder 2a in the discharge unit 2 of the two powder or granular material supply devices 10 can be positioned at a position where it can be selectively opened and closed and an intermediate position, from the discharge unit 3. An on-off valve 17 capable of preventing the powder or granular material from coming out is provided. The on-off valve 17 is configured to allow the powder or granular material to come out from the discharge portion 2 of both powder or granular material supply devices 10 in the neutral position. The on-off valve 17 is driven by a driving means such as a motor or a solenoid valve, but is omitted in the drawings.

While the powder or granular material supply device 15 is used to quantitatively supply the powder or granular material from one powder or granular material supply device 10, the powder or granular material is supplied to the other powder or granular material supply device 10 from the supply device 11. The switching valve 13 is switched so that the powder can be replenished, and at this time, the on-off valve 17 of the discharge unit 2 of the other powder or granular material supply device 10 is closed. Then, when the amount of powder or granular material remaining in one of the powder or granular material supply device 10 is low, the supply amount from one of the powder or granular material supply device 10 is gradually reduced, and in parallel with this, the other powder is used. The supply amount of the granular material supply device 10 is gradually increased in correspondence with the decrease amount. After that, the powder or granular material is discharged (quantitatively supplied) from the other powder or granular material supply device 10, and the powder or granular material is replenished to the one powder or granular material supply device 10 from the supply device 11.

With this powder / granular material supply equipment 15, the powder / granular material supply operation can be continuously performed, and at the same time, the supply weight (that is, the supply amount) per hour is constant even when the powder / granular material supply is switched. It can be supplied and the supply accuracy can be maintained well.

1 Hopper 2 Discharge part 2b Screw 2f Discharge outlet cylinder 3 Chute 3a Inclined surface 3b Conical wall part 3c Side wall part 3d Connection opening 4 Stirring part 4b Stirring member 5 Weighing part 10 Powder or granular material supply equipment 15 Powder or granular material supply equipment 11 Device 13 Switching valve 17 On-off valve

Claims (4)

A hopper into which powder particles are charged, a discharge unit that discharges the powder particles by a screw, a chute that guides the powder particles that have fallen from the hopper to the discharge unit, and a stirring unit in which the stirring member rotates in the chute. A powder or granular material supply device equipped with,
The chute is provided with an inclined surface whose inner surface is inclined so as to face diagonally upward, and a conical wall portion extending in a conical shape from the outer periphery of the inclined surface .
The stirring member is arranged in a posture of rotating along the inclined surface of the chute and the inner surface of the conical wall portion about the axial center portion protruding diagonally upward from the inclined surface of the chute.
The chute is provided with a connection opening following the discharge portion at the lower end of the conical wall portion along the rotational tangential direction of the stirring member passing through the bottom of the chute.
A powder or granular material supply device, characterized in that a screw for discharging powder or granular material at the discharge portion is arranged so as to extend along the connection opening. The powder or granular material supply device according to claim 1, wherein the stirring member is configured to be rotated in the same direction as the discharge direction by the screw. A powder or granular material supply facility provided with the powder or granular material supply device according to claim 1 or 2 as a pair .
The paired powder or granular material supply devices are arranged in such a posture that the sides of these powder or granular material supply devices on which the inclined surface of the chute is not formed face each other and approach each other.
A powder and granular material supply facility characterized by. A replenishment device that alternately replenishes the powder or granular material to one of the powder or granular material supply devices of the paired powder or granular material supply device,
It is possible to prevent the powder or granular material from coming out from the discharge part by making it possible to position the outlet opening of the discharge cylinder in the discharge part of the paired powder or granular material supply device at the position where it is selectively opened and closed and the intermediate position. On-off valve and
Equipped with
The powder or granular material supply according to claim 3 , wherein the powder or granular material is continuously supplied by switching the supply of the powder or granular material from these paired powder or granular material supply devices. Facility.

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