JP5446037B2 - Purifier - Google Patents

Description

  The present invention is based on semolina (fragments of various particle sizes) or midlings (relatively coarse of endosperm grains crushed by a brake roll) generated in the milling process, and the air that flows upward from below the sieve. The present invention relates to a purifier for obtaining pure semolina by separating an overtail with a lot of bran (skin) in combination with a flow action.

  As a conventional purifier, for example, one disclosed in Patent Document 1 is known (see FIG. 7). This has an air distribution chamber 122 on the sieve layer 103, and the air distribution chamber 122 includes an inclined surface 111 and a partition wall 123 of the air distribution chamber 122 which are inclined in the direction in which the air flow from the sieve layer 103 is collected. A plurality of formed air guide chambers 124 are provided, these air guide chambers 124 reach the vicinity of the uppermost sieve layer 103, and a suction passage 127 made of a horizontal cyclone is installed on the air distribution chamber 122. Furthermore, the air flow collected on the inclined surface of the air distribution chamber 122 is transferred from the air distribution chamber 122 to the suction passage 127 in the tangential direction of the suction passage 127 so as to form a vortex flow with respect to the suction passage 127 as it is. The diaphragm 128 is arranged at the transition part.

  Thereby, a cyclone flow is generated in the suction passage 127 by the tangential direction transition portion.For example, a strong vortex flow is formed in the suction passage 127 regardless of the opening position of the throttle 128 on one side. There is an effect that particles are not deposited, the aperture opening is not clogged, and the machine is kept clean.

  However, in the conventional purifier, the suction force in the vicinity of the center portion in the width direction (X direction) of the sieve layer 103 shown in FIG. 7 is strong, and the suction force in the vicinity of both ends in the width direction is weak. It was difficult to suck the powder evenly.

Japanese Patent Publication No. 1-222827

  In view of the above-mentioned problems, the present invention provides an air distribution chamber tapered toward the upper side above the sieve layer, and even if the horizontal cyclone is provided above the air distribution chamber, It is a technical problem to provide a purifier capable of sucking powder evenly in the width direction.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a plurality of sieve layers stacked on top of each other are stored in an inclined manner in the sieve box, and the sieve box has a non-vibrating element by at least four legs. The sieve box is connected to a vibration generator so as to be vibrated in the longitudinal direction of the sieve box, and a sieving material supply unit is provided upstream of the sieve box. In addition, the downstream side of the sieve box is connected to the discharge part of the overstuff, and the lower part of the sieve box is provided with a collecting device for collecting the granular material dropped from the sieve, and further above the sieve box In a purifier provided with an air distribution chamber for sucking air that has penetrated upward from below the sieve,
The air distribution chamber is composed of a pair of inclined surfaces that are tapered upward, and a horizontal cyclone suction passage is placed on the upper portion thereof. A plurality of partition walls are provided in a direction perpendicular to the longitudinal direction of the layer, and the partition walls are divided into a plurality of chambers by the partition walls. A rectifying plate for preventing suction unevenness is provided, and the air distribution chamber is arranged separately on the left and right with respect to a central machine frame, and a horizontal cyclone placed on the upper portion of the air distribution chamber is provided in the center. In addition , a technical means was adopted in which each of the rectifying plates was inclined toward the installation direction of the horizontal cyclone, while being deflected from each other near the machine frame .

  According to a second aspect of the present invention, the current plate is formed in a rectangular punching metal, the hole diameter thereof is in the range of 4.5 to 8.0 mm, and the aperture ratio is 51% or less. Features.

According to the first aspect of the present invention, the air distribution chamber is provided with a current plate for preventing uneven suction of the powder on the sieve layer at the narrowed portion of the pair of inclined surfaces. The suction force in the width direction becomes uniform, and it becomes possible to suck the powder evenly to prevent suction unevenness. Thereby, since the classification purification is performed by the rectified ascending current, the classification purification is performed uniformly and the product quality is also improved. Moreover, there is little accumulation of the powder on the upper surface of a baffle plate, and it becomes possible to reduce the maintenance after operation.

  According to invention of Claim 2, since the baffle plate is formed in a punching metal, the hole diameter is in the range of 4.5 to 8.0 mm, and the aperture ratio is 51% or less, the width on the sieve The effect of equalizing the suction force in the direction is remarkably improved as compared with the conventional case, and the effect of sucking powder evenly and preventing suction unevenness is enhanced.

1 is a schematic perspective view of a purifier according to an embodiment of the present invention. It is a partially broken front view of the same purifier. It is a right view of the same purifier. It is a longitudinal cross-sectional view when the AA line of FIG. 2 is fractured. It is the schematic of the baffle plate arrange | positioned above an air distribution chamber. It is a schematic perspective view at the time of attaching a baffle plate to an air distribution chamber. It is the schematic of the air distribution chamber of the conventional purifier.

  The best mode for carrying out the present invention will be described with reference to the drawings. 1 is a schematic perspective view of a purifier according to an embodiment of the present invention, FIG. 2 is a partially broken front view of the purifier, FIG. 3 is a right side view of the purifier, and FIG. It is a longitudinal cross-sectional view when the AA line of FIG. 2 is fractured.

<Overview>
1 to 4, the purifier 1 of the present invention has a dual structure in which so-called sieve boxes are arranged in two rows and can process two types of stock, and is separated to the left and right with respect to the central machine casing 17. Arranged.

  As shown in FIGS. 1 and 2, a supply port 2 is provided on the upper left side of the machine body, that is, on the upstream side of the sieve box 10 to supply powder particles that are raw materials before classification and purification. On the lower side, that is, on the downstream side of the sieve box 10, a separation outlet 3 for a separation (overtail) that could not pass through the mesh of the sieve is provided. The sieve box 10 is provided with sieves 4 stacked in three stages, and the sieves 4 gradually increase in width in the longitudinal direction of the sieve box 10, that is, from the upstream side to the downstream side. A plurality are arranged. Below these sieves 4... Are arranged an inner trough 5 and an outer trough 6 (see FIG. 4) that serve as a powder collecting device, and the sieved powder granules are the inner trough 5 and the outer trough. 6, and the inner trough 5 is connected to the central drop port 7 to take out the granular material that has passed through the sieve 4. The outer trough 6 is provided with a sieve 4 having a large mesh. The upstream drop port 8 that has passed through and the downstream drop port 9 that has passed through the sieve 4 having a small mesh are connected to each other, so that particles having different particle sizes can be taken out of the machine. Reference numeral 50 denotes a product guide flap for switching the dropping port, reference numeral 51 denotes an intake port, and reference numeral 52 denotes a raw material supply feeder.

<Vibration configuration>
Each of the sieves 4 is accommodated in a sieve box 10, and the sieve box 10 is supported on a support base 12 by at least four legs 11, and is supported by the legs 24 and a seat 24 at the lower end. Between the seat portion 27 of the base 12, hollow rubber springs 13 as a vibration member and roll vibration isolation members 14 are interposed. As a result, the hollow rubber springs 13... That are consumables can be easily taken out of the machine by removing the seats 24 and 27, the maintenance is easy, and the replacement time can be shortened. And the cross beam member 49 etc. which connect each leg part 11 to a rectangular shape are assembled | attached, and the two unbalanced vibration generators 15 are provided in the supply port 2 side of the said leg part 11 and the cross beam member 49. FIG. Is attached, and a vibration in a linear constant direction in the direction of arrow A (see arrow A in FIG. 1) is generated.
The roll vibration isolation member 14 allows movement in the front-rear direction (arrow y direction in FIG. 1) and the vertical direction (arrow z direction in FIG. 1), while moving in the left-right direction (arrow xx direction in FIG. 1). The direction of the original linear vibration direction (the direction of arrow A in FIG. 1) even when the vibration direction by the unbalanced vibration generator 15 at the time of starting and stopping is unstable. And has an effect of preventing the occurrence of lateral rolling with respect to the sieve box 10.

  The unbalanced vibration generator 15 (see FIG. 2) can be adjusted by rotating the pipe-shaped joint 15a, and the unbalance strength can be adjusted by appropriately adjusting the unbalanced weight 15b. It is moderated. Two unbalanced vibration generators 15 are fixed to the pipe-shaped joint 15a, and are electrically connected so as to vibrate in the opposite direction, thereby removing the unbalanced component to the side. This is a configuration in which pure linear longitudinal vibration in the direction of arrow A occurs. Reference numeral 16 denotes a cover body of the unbalanced vibration generator.

<Non-vibrating element>
The machine frame 17 on the support 12 carries non-vibrating elements (see FIG. 4), and the upper end of the machine frame 17 is formed in a substantially T shape so as to exceed the left and right sieve boxes 10. The machine frame 17 holds a support base 19 that forms a top air distribution chamber 18 that is a part of a non-vibrating element. The air distribution chamber 18 is for sieving by allowing air to pass from the lower side to the upper side of the plurality of stages 4 to raise the air mixed with the powder that has passed through the sieves 4. In the distribution chamber 18, a plurality of partition walls 53 (see FIG. 6) are provided in a direction perpendicular to the longitudinal direction of the sieve 4, and divided into a plurality of chambers by the partition walls 53. The air distribution chamber 18 is provided with a rectifying plate 20 which is formed on the inclined surface 18a at the upper portion thereof, and prevents uneven suction of powder on the sieve 4 at a narrowed portion of the pair of inclined surfaces 18a. A cyclone-type suction part 21 is connected to the end so as to form a vortex in the collected air. The suction portion 21 is connected to a suction exhauster (not shown) via a suction exhaust pipe 23. Reference numeral 22 denotes an open / close valve for adjusting the amount of air sucked.

<Configuration of current plate in air distribution chamber>
FIG. 5 shows a rectifying plate 20 disposed above the air distribution chamber 18. The rectifying plate 20 is a rectangular iron plate having a length of 124 mm, a width of 204 mm, and a thickness of 1.6 mm. A large number of round holes are punched in the iron plate and formed into punching metal. When a punching metal made of a round hole having a diameter larger than 8.0 mm is used as the rectifying plate 20, the suction force near the center in the width direction on the sieve 4 is strong, and suction near both ends in the width direction on the sieve 4 is performed. Since the force is weak, the effect of preventing the uneven suction of the powder is the same as before. On the other hand, when a punching metal having a round hole diameter of less than 8.0 mm is used, the suction force in the width direction on the sieve 4 becomes uniform, and the powder can be sucked evenly. According to a more preferred embodiment, if the punching metal having a round hole diameter of 4.5 mm is formed with an opening ratio of about 51% or less, the suction force in the width direction on the sieve 4 becomes more uniform, and the powder is evenly distributed. It is possible to prevent suction unevenness by sucking in.

A method of attaching the current plate 20 will be described with reference to FIGS. 4 and 6. As shown in FIG. 4, the rectifying plate 20 is provided to be inclined, and the air distribution chamber is arranged separately on the right and left with respect to the central machine frame, and is placed on the upper portion of the air distribution chamber. The horizontal cyclones are arranged so as to be deflected from each other near the center machine frame, while the rectifying plates are arranged to be inclined toward the installation direction of the horizontal cyclones.
And as shown in FIG. 6, the baffle plate 20 is hold | maintained so that insertion / extraction is possible by the guide rail 54 ... attached to the partition 53 .... As shown in FIG. As described above, the guide rail 54 is attached at 30 degrees from the horizontal direction on the side holding the current plate 20B, and is inclined at a position 150 degrees from the horizontal direction on the side holding the current plate 20A. Are arranged. Thus, by attaching the rectifying plate 20 to be inclined with respect to the horizontal position, the accumulation of powder on the upper surface of the rectifying plate 20 is eliminated, and the maintenance after the purifier 1 is operated can be reduced. If the current plate 20 is attached in the horizontal direction, powder accumulates on the upper surface of the current plate, and maintenance such as cleaning after operation becomes necessary.

<Action>
Next, the operation of the above configuration will be described. To activate the purifier 1, first, when the two unbalanced vibration generators 15 are operated, the sieve box 10, the inner trough 5, and the outer trough 6 start to vibrate. At this time, the lateral vibration isolating member 14 restricts the movement in the left-right direction (arrow x direction in FIG. 1), directs the original linear vibration direction (arrow A direction in FIG. 1), and Generation of lateral rolls is prevented. Also, air is sucked from the intake port 51 by the operation of a suction exhauster (not shown) connected to the suction / exhaust pipe 23, and an upward air flow is generated from the lower side of the sieve 4 of the sieve box 10 upward.

  At this time, the rectifying plate 20 provided above the air distribution chamber 18 rectifies the suction of air to the intake port 51, and the upward air flow generated upward from below the sieves 4 of the sieve box 10 is evenly distributed. The action of sucking powder occurs.

  And the granular material used as the raw material before classification purification is supplied to the raw material supply feeder 52 from the supply port 2, and after being rectified wide by the raw material supply feeder 52, it is supplied on the sieve 4 .... The granular material on the sieve 4 slightly tilted back and forth flows to the downstream side by vibration in the front-rear direction (A direction in FIG. 1), and the granular material is shaken on the sieve 4 to be heavy. Particles sink below and light particles float above. Then, the light skin part is lifted by the rising air flow rectified in the width direction of the above-mentioned sieve 4 passing through the sieve 4 from above to below, the heavy particles remain as they are, and the semolina particles pass through the mesh of the sieve 4. It falls on the sieves 4b and 4c. Since the screens 4 are gradually coarsened from the upstream side to the downstream side, the semolina particles falling from the upstream side sieves 4 are fine in particle size, and the semolina particles falling from the downstream side sieve 4 are small in particle size. large. Further, the overtail including the skin portion that does not fall from the sieves 4 is guided to the separated product outlet 3.

  The semolina particles dropped from the sieves 4 are collected and classified by the inner trough 5 and the outer trough 6. That is, semolina particles that have been sieved are collected in the inner trough 5 and outer trough 6, and further, the inner trough 5 communicates with one central drop port 7 and takes out the semolina particles that have passed through the sieve to the outside. In the outer trough 6, semolina particles having different particle sizes are connected to the upstream dropping port 8 that has passed through the large sieve and the downstream dropping port 9 that has passed through the small sieve, respectively. It is taken out.

  As described above, according to the present embodiment, since the rectifying plate for preventing uneven suction of the powder on the sieve 4 is disposed above the air distribution chamber 18, the suction force in the width direction on the sieve 4. Became even, and it became possible to suck the powder evenly to prevent uneven suction. Moreover, if the baffle plate is formed in the rectangular punching metal, the hole diameter is in the range of 4.5 to 8.0 mm, and the aperture ratio is 51% or less, the width direction on the sieve 4 The effect of equalizing the suction force is remarkably improved as compared with the conventional case, and the effect of sucking the powder evenly to prevent suction unevenness is enhanced. Further, as shown in FIG. 4, the mounting direction of the rectifying plate 20 is inclined at a position of 30 degrees from the horizontal direction in the rectifying plate 20B and at a position of 150 degrees from the horizontal direction in the rectifying plate 20A. In particular, in the case of a double structure in which sieve boxes are arranged in two rows, the current plate is arranged in an inverted “C” shape. Thereby, there is little accumulation of the powder on the upper surface of the baffle plate 20, and it becomes possible to reduce the maintenance after operation.

  The present invention can be applied to a purifier that uses both the vibrating action of the sieve and the action of the air flow that passes upward from the lower side of the sieve, and a sieve apparatus that is divided into a vibration system component and a non-vibration system component.

DESCRIPTION OF SYMBOLS 1 Purifier 2 Supply port 3 Separation object discharge port 4 Sieve 5 Inner trough 6 Outer trough 7 Central drop port 8 Upstream drop port 9 Downstream drop port 10 Sieve box 11 Leg 12 Support stand 13 Hollow rubber spring 14 Rolling prevention Vibration member 15 Unbalanced vibration generator 16 Cover body 17 Machine frame 18 Air distribution chamber 19 Support base head 20 Rectifier plate 21 Suction part 22 Opening / closing valve 23 Suction exhaust pipe 24 Seat part 27 Seat part 46 Separator discharge rod 47 Bulkhead 48 Bulkhead 49 Cross beam member 50 Product guide flap 51 Inlet port 52 Raw material supply feeder 53 Bulkhead

Claims (2)

A plurality of sieve layers stacked on top of each other are tilted and stored in a sieve box, and the sieve box is supported on a support base that is a non-vibrating element by at least four legs, and the sieve box Is connected to a vibration generator so that it can vibrate in the longitudinal direction of the sieve box, while the sieving material supply part is upstream of the sieving box, and the over-material discharge part is downstream of the sieving box. And a collecting device for collecting powder particles dropped from the sieve is provided below the sieve box, and further, air passed from the lower side of the sieve to the upper side is provided above the sieve box. In a purifier equipped with an air distribution chamber for suction,
The air distribution chamber is composed of a pair of inclined surfaces that are tapered upward, and a horizontal cyclone suction passage is placed on the upper portion thereof. A plurality of partition walls are provided in a direction perpendicular to the longitudinal direction of the layer, and the partition walls are divided into a plurality of chambers by the partition walls. A rectifying plate for preventing suction unevenness is provided, and the air distribution chamber is arranged separately on the left and right with respect to a central machine frame, and a horizontal cyclone placed on the upper portion of the air distribution chamber is provided in the center. The purifier is characterized in that each rectifying plate is inclined toward the installation direction of the horizontal cyclone while being deflected from each other near the machine frame .   The purifier according to claim 1, wherein the current plate is made of a punching metal and has a hole diameter in a range of 4.5 to 8.0 mm and an aperture ratio of 51% or less.

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