JP4121470B2 - Silo blender - Google Patents

Description

  The present invention relates to a storage / discharge device that stores powder particles in a storage tank (silo) and discharges the powder particles to the outside in a gravity drop manner, and more particularly, to a silo blender having a mixed discharge means for mixing and discharging powder particles. Is.

  The silo blender stores powder particles in a storage tank, mixes them in a gravity drop manner, and discharges them.

  In general, the storage tank has a ceiling portion having an inlet for introducing powder particles therein, a cylindrical body portion having a peripheral wall extending in the vertical direction coupled to the periphery of the ceiling portion, and powder particles at the lower end. A discharge port for discharging the body to the outside is provided, and is composed of a downward convex hopper having an inner peripheral surface inclined downward toward the discharge port, and the hopper is formed at the lower peripheral edge of the peripheral wall of the body portion. Are combined. The granular material is introduced into the storage tank from the inlet of the ceiling, and sequentially deposited and stored on the hopper. The granular material is discharged to the outside in a gravity drop manner by opening the discharge port of the storage tank.

In order to mix and discharge the powder, the conventional silo blender has a plurality of scourers provided on the inner peripheral surface of the hopper along the hopper bus extending radially from the center of the discharge port. A cylindrical partition in which a flow path called a gutter and a peripheral wall are fixed to the upper end of each outlet of the chute, and the center of the discharge port is located directly below the top, It has an outer peripheral surface that is inclined from the top to the lower edge, and the lower edge is fixed to each upper surface of the chute so as to cover the upper part of the partition, and a plurality of holes are formed at positions below the upper end of the partition. It had a mixing and discharging means composed of the formed shell (for example, see Patent Document 1).
JP 7-309392 A

  In this conventional silo blender, each chute has one inlet that faces radially outward from the center of the outlet, and one outlet that communicates with these inlets and faces the center of the outlet. In addition, the opening on the side surface of the chute is formed, but when the granular material is discharged from the storage tank, the opening on the side surface of the chute is the granular material while the granular material is discharged through the chute. (That is, a fanul flow (also referred to as funnel flow, which means a solid flow toward the outlet through a flow path formed in a stagnant substance) is not formed).

  Further, in this conventional technique, even if the first mixing process is performed, the mixing process is not sufficiently performed. Therefore, it is necessary to perform the second mixing process after the first mixing process, which takes time and effort. For example, in order to obtain the mixing performance (mixing ratio of 95%) achieved by a mechanically driven ribbon screw blender using the above-described conventional silo blender, The mixing ratio after the second mixing process is 40 to 60%), and the second conventional mixing process (the mixing ratio after the second mixing process is 88 to 95%). There is a need to do.

  For this reason, a silo blender that mixes powder particles in a gravity drop manner and discharges the powder to the outside is required to have a higher mixing performance in a single mixing process.

  Therefore, the objective of this invention is providing the silo blender which improved the mixing performance of the granular material.

  The silo blender of the present invention that achieves the above object is composed of a storage tank for storing powder particles, and a mixing and discharging means for mixing and discharging the powder particles put into the storage tank.

  The storage tank has a ceiling part having an insertion port for introducing the granular material, a cylindrical body part having a peripheral wall extending in the vertical direction coupled to the periphery of the ceiling part, and for discharging the granular material to the outside at the lower end. And a hopper having an inner peripheral surface inclined downward toward the discharge port and coupled to the lower end periphery of the peripheral wall of the body portion. Preferably, the body part is a cylindrical hollow cylinder and the hopper is an inverted conical shell.

  The mixing and discharging means has a plurality of shunts provided on the inner peripheral surface of the hopper so as to follow the hopper bus extending radially from the center of the discharge port. Each of these chutes has a plurality of inflow ports that are directed radially outward from the center of the discharge port, and a single outflow port that communicates with these inflow ports and faces the center of the discharge port. Then, at least two of the plurality of inlets of each chute are located at different distances from the center of the outlet. Preferably, each chute has two inlets (first and second inlets), the distance from the center of the outlet where the first inlet is located, and the second inlet is located. The distance from the center of the outlet is different.

  The mixing and discharging means has a peripheral wall, and has a cylindrical partition in which the lower end periphery of the peripheral wall is fixed to the upper end portion of each of the plurality of chutes, and a top portion and a lower end periphery, and covers the upper portion of the partition Thus, the lower peripheral edge further has an upwardly convex shell fixed to the upper surface of each chute. The center of the discharge port is located immediately below the top of the shell, and the shell is formed with an upward convex outer peripheral surface inclined from the top toward the lower edge of the shell, and a plurality of positions formed below the upper part of the partition. Consists of holes. Preferably, the partition is a polygonal or circular hollow cylinder formed by a peripheral wall extending in the vertical direction. The shell is a conical shell.

  The mixing and discharging means further includes a downward convex flow-down control plate having an upper end periphery fixed to the peripheral wall of the body portion of the storage tank and a top portion positioned below the upper end periphery. The flow control plate is inclined downward from the upper edge of the flow control plate toward the top of the flow control plate, and a downward convex inclined plate in which the top of the shell is located directly below the top of the flow control plate, and Consists of a plurality of flow-down openings formed in the inclined plate. Preferably, the plurality of flow outlets of the flow control plate are spaced apart from one first flow outlet formed at the top of the inclined plate, a plurality of second flow outlets formed in the inclined plate, and an upper edge of the inclined plate. It has a plurality of third downflow holes formed by opening. Here, at least one of the plurality of second downflow ports is located above the position of at least one of the inflow ports of the chute.

  The flow-down control plate is placed on the flow-down control plate so that the granular material thrown in from the inlet of the ceiling portion is deposited on the flow-down control plate, and then flows down onto the hopper through the plurality of flow-down ports of the inclined plate. Controls the flow of accumulated particulates onto the hopper.

  That is, the granular material that has been thrown in later accumulates on the granular material already deposited on the flow control plate, but a part of the granular material already deposited is close to the top of the inclined plate. Since the powder that has flowed in through the flow outlet on the side flows down from the flow outlet on the side farther from the top of the inclined plate, the powder that has been thrown into the storage tank flows almost in a mixed state. Deposit on control board and hopper respectively.

  Thus, the granular material thrown in from the inlet of a ceiling part accumulates on a flow control board and a hopper in this way, and is filled in the storage tank.

  The granular material stored in the storage tank is discharged to the outside by opening the discharge port at the lower end of the hopper.

  When this discharge port is opened, the granular material flows out to the vicinity of the discharge port through each hole formed in the shell, the space formed by the chutes and the lower peripheral edge of the shell, and the outlet of each chute. , Mixed and discharged to the outside through the discharge port.

  During the discharge of the granular material in this way, from the granular material deposited on the flow control plate, through each of the flow outlets formed on the inclined plate and further on the hopper, A plurality of fanul flows following each hole and each inlet of each chute are formed, and by these fanul flows, the powder particles at a plurality of locations inside the storage tank are simultaneously discharged toward the outlet, It is mixed near the discharge port and discharged to the outside through the discharge port.

  Since the flow control plate having a plurality of flow outlets is coupled to the peripheral wall of the cylindrical portion, when the powder particles are continuously charged from the charge port, the powder particles charged first and the powder particles charged later are They are mixed together and deposited on the flow control plate and the hopper.

  Each chute is provided with a plurality of inlets radially outward from the center of the outlet, and at least two of the inlets of each chute are different from each other from the center of the outlet. Because of the distance, the number of fanul flow in the storage tank leading to the chute inlet increases, so that the powder particles inside the storage tank flow into the chute simultaneously from more locations and flow out to the outlet. To do.

  In this way, the charged granular material is mixed and stored in the storage tank, and the granular material can be discharged from more places, so the mixing performance of the discharged granular material is improved, and a single storage tank Can be used to achieve high mixing performance in a single mixing process.

  As shown in FIG. 1, the silo blender 10 of this invention is comprised from the storage tank 20 which stores a granular material, and the mixing discharge means 30 which mixes and discharges the granular material thrown into this storage tank 20. As shown in FIG.

  The storage tank 20 includes a circular ceiling portion 21 having an insertion port 22 into which powder particles are charged, a cylindrical body portion 23 having a peripheral wall 24 extending in the vertical direction coupled to the periphery of the ceiling portion 21, and a powder at the lower end. A discharge port 27 for discharging the particles to the outside is provided, and has an inverted conical inner peripheral surface 26 inclined downward toward the discharge port 27, and is coupled to the lower peripheral edge of the peripheral wall 24 of the body portion 23. The hopper 25 is configured.

  The peripheral wall 24 of the trunk portion 23 may be in a shape selected from a polygonal shape, an elliptical shape, or the like, as long as it has a shape that allows the stored granular material to flow down naturally due to gravity. Moreover, the shape of the inner peripheral surface 26 of the hopper 25 may be a shape that is continuously coupled from the lower end periphery of the peripheral wall 24 of the body portion 23 and functions like a funnel, and is a shape such as an inverted polygonal cone or an inverted dome shape. You can choose. Preferably, the inner peripheral surface 26 is inclined by 30 ° to 45 ° from a vertical axis 29 passing through the center 28 of the discharge port 27. In particular, when powder particles such as resin-based pellets are air-fed through a pipe to the inlet, such particles are charged with static electricity during air-feeding and adhere to the inner peripheral surface 26 of the hopper 25. In order to improve the function of the hopper 25 as a funnel, the inner peripheral surface 26 of the hopper 25 may be inclined downwardly like a spire (the inner peripheral surface 26 is inclined at a small angle from the vertical axis 29). desirable.

  As shown in FIGS. 1 and 2, the mixing and discharging means 30 includes six shrouds provided on the inner peripheral surface 26 of the hopper 25 so as to extend along the generatrix of the hopper 25 extending radially from the center of the discharge port 27. 31. In the illustrated example, six chutes 31 are provided on the inner peripheral surface 26 of the hopper 25 at an equal angle (60 °), but the number of chutes 31 and the angle between the chutes 31 can be selected as appropriate.

  Each chute 31 communicates with the first inlet 32 a and the second inlet 32 b that are directed radially outward from the center 28 of the outlet 27, and the inlets 32 a and 32 b, and the center 28 of the outlet 27. And an outlet 33 facing the front. The first inflow port 32a is located farther from the center of the discharge port 27 than the second inflow port 32b. As described above, the positions of at least two of the plurality of inlets of each chute 31 (first and second inlets indicated by reference numerals 32a and 32b in the illustrated example) Since they are located at different distances from the center, when the granular material is discharged from the reservoir 20, a fanul flow reaching these inflow ports is formed. In the illustrated example, the chute 31 has two inlets, ie, first and second inlets 32 a and 32 b, but has three or more inlets, and these inlets communicate with one outlet 33. However, at least two of the plurality of inlets of the chute may be located at different distances from the center 28 of the outlet 27. (For example, when the chute 31 has first, second and third inlets, the distance from the center 28 of the outlet 27 of each inlet differs between the first inlet and the second inlet. The third inlet may be different from both the first and second inlets, or may be the same as one of the first and second inlets. )

  As shown in FIGS. 4A and 4B, the chute 31 is constituted by an upper surface 34 extending from the first and second inlets 32a and 32b to the outlet 33, side surfaces 35 facing each other, and an inner peripheral surface 26 of the hopper 25. It is the linear flow path of the cross section rectangle comprised. The cross-sectional shape inside the chute 31 that functions as a flow path for the powder particles may be a rectangle as shown in the figure, or may be a semicircular shape, a semielliptical shape, or the like.

  The mixing and discharging means 30 has a peripheral wall, and has a cylindrical partition 36 in which the lower end periphery of the peripheral wall is fixed to the upper end portion of the outlet 33 of each chute 31, and a top portion and a lower end periphery. Further, the peripheral edge of the lower end further includes an upwardly convex shell 37 fixed to the upper surface 34 of each chute 31. The center 28 of the discharge port 27 is located immediately below the top of the shell 37, and the shell 37 is located above the top convex outer peripheral surface inclined from the top toward the lower edge of the shell 37 and the upper end of the partition 36. It consists of six holes 38 formed in the lower position. In the illustrated example, the partition 36 is a polygonal (hexagonal) hollow cylinder formed by a peripheral wall extending in the vertical direction, but may be a circular hollow cylinder. The shell 37 is a conical shell, but may be a polygonal pyramid or dome-shaped shell. In the illustrated example, six holes 38 are formed in the shell 37, but the number of these holes 38 can be selected as appropriate. Preferably, each hole 38 is provided between the chutes 31 as shown in FIG. In addition, in order to prevent powder particles from remaining in the vicinity of the fixed portion between the upper surface 34 of each chute 31 and the shell 37, a fixed lug 39 made of two triangular plates is connected to the upper surface 34 of each chute 31 and the shell 37. It is fixed to the outer peripheral surface.

  As shown in FIGS. 1 and 3, the mixing and discharging means 30 has a downward convex downward flow having an upper end periphery fixed to the peripheral wall 24 of the body portion 23 of the storage tank 20 and a top portion positioned below the upper end periphery. A control plate 40 is further included.

  The flow-down control plate 40 is inclined downward from the upper edge of the flow-down control plate 40 toward the top of the flow-down control plate, and is a downward convex inclined plate in which the top of the shell 37 is located directly below the top of the flow-down control plate. 41 and a plurality of downflow ports 42, 43a, 43b, 44 formed in the inclined plate 41. The inclination angle of the inclined surface of the inclined plate 41 is preferably in the range of 40 ° to 45 ° from the vertical axis 29 passing through the center 28 of the discharge port 27.

  As shown in the figure, these flow down openings 42, 43 a, 43 b, 44 are one first flow down opening 42 formed at the top of the inclined plate 41, and a plurality of second flow down openings 43 a formed in the inclined plate 41, 43b and a plurality of third downflow ports 44 formed at intervals on the upper end periphery of the inclined plate 41. Here, at least one of the plurality of second downstream ports 43a and 43b (a downstream port indicated by reference numeral 43a in the illustrated example) is at least one of the plurality of inlets of each chute 31. It is located above the position of the inlet (in the example shown, the second inlet indicated by reference numeral 32b).

  In the example shown in the drawing, six second inclined outlets indicated by reference numeral 43a are formed on the inclined plate 41 so as to be positioned above the second inlet 32b of each chute 31, and the second falling outlet indicated by reference numeral 43b is provided. Six of the inclined plates 41 are formed so that the mouths are positioned between the chutes 31. The second downflow ports formed in the inclined plates 41 are the second downflow ports 43a and 43b. However, the second downflow port other than the second downflow port indicated by reference numerals 43 a and 43 b may be formed in the inclined plate 41. In the example shown in the figure, twenty-four semicircular third downflow ports 44 are formed at equal intervals around the upper edge of the inclined plate 41. However, the number, shape, and upper end of the third downflow ports 44 are the same. The position on the peripheral edge is selected such that a fanul flow is formed between at least one of the third flow-down ports 44 and the first flow-in port 32a of the chute 31 when the granular material is discharged (illustrated). In this example, a fanul flow shown by an arrow F3 in FIG. 1 is formed between the first inlet 32a of the chute 31 and the two third outlets 44 on the first outlet 32a). .

  Until the storage tank 20 is filled, the granular material is continuously charged from the charging port 22 of the ceiling portion 21.

  The powder particles flow down from the first flow-down port 42 toward the hopper 25 (indicated by an arrow G1) while being deposited on the flow-down control plate 40, and are deposited on the hopper 25. When the granular material deposited on the flow-down control plate 40 reaches the second flow-down port 43b, it flows down from the second flow-down port 43b toward the hopper 25 (indicated by an arrow G2). When the particulates deposited and then deposited on the flow-down control plate 40 reach the second flow-down port 43a, they flow down from the second flow-down port 43b toward the hopper 25 (indicated by an arrow G3). , Deposited on the hopper 25. When the granular material deposited on the flow-down control plate 40 reaches the third flow-down port 44, it flows down from the third flow-down port 44 toward the hopper 25 (indicated by an arrow G4).

  The granular material charged from the charging port 22 is deposited on the flow-down control plate 40 so as to draw ridgelines A1, A2, and A3, and the first, second, and third flow-down ports 42 of the flow-down control plate 40, 43a, 43b and 44 are sequentially passed through the hopper 25 and deposited so as to draw ridge lines B1 and B2. When the granular material deposited on the hopper 25 reaches the first flow-down port 42, The flow of the granular material from the flow-down port 42 is stopped, and when the granular material deposited on the hopper 25 reaches the second and third flow-down ports 42, 43a, 43b, 44 sequentially, the flow from the flow-down port 42 The flow of the powder particles stops sequentially.

  In this way, the powder particles put on the flow control plate 40 are deposited on the flow control plate 40, and the flow ports 42, 43a located farthest from the position closest to the top of the flow control plate 40 are disposed. , 43b, 44 sequentially flow toward the popper 25, so that the granular material charged into the storage tank 20 is deposited on the flow control plate 40 and the hopper 25 in a substantially mixed state to fill the storage tank 20. .

  Next, the granular material is discharged outside from the storage tank 20 filled with the granular material in this way. When the outlet 27 at the lower end of the hopper 25 is opened, the granular material is formed in the space formed by the holes 38 of the shell 37, the chutes 31 and the lower edge of the shell 37, and the outlet 33 of each chute 31. And flows out to the vicinity of the discharge port 27, mixes and is discharged to the outside from the discharge port 27. At this time, at least each of the shells 37 is passed through the particles accumulated on the flow control plate 40 from the particles 42, 43a, 43b, 44 of the flow control plate 40 and the particles accumulated on the hopper 25. A plurality of fanul flows F1, F2, F3 following the hole 38 and the first and second inlets 32a, 32b of each chute 31 are formed, and the powder particles are discharged along the fanul flows F1, F2, F3. It flows out toward 27, mixes in the vicinity of the discharge port 27, and is discharged from the discharge port 27 to the outside.

FIG. 1 is a side sectional view of a silo blender according to the present invention. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4A is a side view of the chute, and FIG. 4B is a front view of the chute.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Silo blender 20 ... Storage tank 21 ... Ceiling part 22 ... Input port 23 ... Body part 24 ... Perimeter wall 25 ... Hopper 26 ... Inner peripheral surface 27 ... Discharge port 28 ... Discharge port center 29 ... Vertical shaft 30 ... Mixed discharge means 31 ... Chute 32a ... First inlet 32b ... Second inlet 33 ... Outlet 34 ... Upper surface 35 ... Side surface 36 ... Partition 37 ... Shell 38 ... Hole 39 ... Fixed lug 40 ... Flow control plate 41 ... Inclined plate 42 ... 1st flow-down port 43a, 43b ... 2nd flow-down port 44 ... 3rd flow-down port A1, A2, A3, B1, B2 ... Ridge line G1, G2, G3, G4 ... Flow-down direction F1, F2, F3 ... Fanul flow

Claims (4)

A silo blender comprising a storage tank for storing powder particles, and mixing and discharging means for mixing and discharging the powder particles from the storage tank,
The storage tank
A ceiling portion having an inlet for charging the granular material into the storage tank;
A cylindrical body portion having a peripheral wall extending in the vertical direction coupled to the periphery of the ceiling portion, and a discharge port for discharging powder particles to the outside are provided at the lower end, and inclined downward toward the discharge port. A hopper coupled to the lower peripheral edge of the peripheral wall of the body part,
Consisting of
The mixing and discharging means comprises:
A plurality of shunts provided on an inner peripheral surface of the hopper so as to extend along a bus line of the hopper extending radially from the center of the discharge port, and each of the chutes radiates from the center of the discharge port. A plurality of inlets facing outward in the direction, and one outlet that communicates with these inlets and faces the center of the outlet, at least of the plurality of inlets of each of the chute A plurality of chutes, wherein two inlets are located at different distances from the center of the outlet;
A cylindrical partition having a peripheral wall, a lower end periphery of the peripheral wall being fixed to an upper end portion of each of the outlets of the chute,
It has a bottom edge and a top located above the bottom edge, and is an upwardly convex shell that is fixed to the upper surface of each chute so as to cover the top of the partition. The center of the discharge port is located directly below the top, and the shell is formed at a position below the upper convex outer peripheral surface inclined from the top toward the lower edge, and below the upper end of the partition. A shell composed of a plurality of holes, and a top edge fixed to the peripheral wall of the body part, and a top located below the top edge, and inclined downward from the top edge toward the top A downward convex inclined plate in which the top of the shell is located directly below the top, and a downward convex flow control plate formed of a plurality of flow openings formed in the inclined plate,
Consisting of,
But silo blender.   The silo blender according to claim 1, wherein the body portion is a hollow cylindrical tube and the hopper is an inverted conical shell.   The silo blender according to claim 1, wherein the partition is a polygonal or circular hollow cylinder formed by a peripheral wall extending in a vertical direction, and the shell is a conical shell. The plurality of flow outlets of the flow control plate are
A first downflow port formed at the top of the inclined plate;
A plurality of second downflow ports formed in the inclined plate, wherein at least one of the second downflow ports is located above at least one of the inflow ports of the chute. A plurality of second flow-down openings, and a plurality of third flow-down openings formed at intervals around the upper edge of the inclined plate,
Having
However, the silo blender according to claim 1.

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