JP3209032U - Powder and particle conveyor - Google Patents

Abstract

The present invention provides a granular material conveying device capable of improving the stable supply while suppressing sticking of granular material. In a granular material conveying apparatus 1 for conveying and supplying granular material using a screw 5, a barrel 6 having an inlet for a granular material and an outlet 63a, and an inlet of the barrel are provided. A coil flight 51 having a conveying surface 51b for extruding the granular material in the conveying direction toward the discharge port, a screw disposed in the internal space of the barrel, and a screw rotation driving device for rotating the screw, In the screw, a plurality of projecting portions projecting radially outward from the outer periphery of the coil flight and projecting in the transport direction from the transport surface of the coil flight are provided along the turning direction of the flight. [Selection] Figure 3

Description

  The present disclosure relates to a granular material conveying apparatus for conveying a granular material.

  2. Description of the Related Art Conventionally, there are known various types of powder particle conveying apparatuses of this type. For example, in the conventional granular material transport device, the powder material introduced into the barrel at the introduction port is rotated along the barrel axial direction by rotating the screw disposed in the barrel. And is supplied to the outside of the barrel at the discharge port.

Japanese Utility Model Publication No. 61-130516 Japanese Patent Publication No.8-17932

  On the other hand, in such a conventional granular material conveying device, since a gap is provided between the inner surface of the barrel and the outer peripheral portion of the screw, the powder material located in such a gap is scraped with a screw. And the granular material tends to stay in the gap. In some cases, the granular material located near the gap may be pressed against the inner surface of the barrel by a screw and deposited and fixed. In order to solve such a problem, it has been proposed to provide a brush, a protrusion, or the like on the outer peripheral portion of the screw to improve the dischargeability of the powdery raw material positioned in the gap (for example, Patent Document 1, 2).

  In recent years, the target of the granular material handled by such a granular material conveying apparatus has been diversified, and it is required to stably convey the diversified granular material. . However, in the granular material conveying apparatus as in Patent Documents 1 and 2, there is room for further improvement from the viewpoint of not only suppressing the fixation of the granular material but also improving the stable supply performance.

  Accordingly, an object of the present disclosure is to solve the above-described conventional problems, and to provide a granular material conveying device capable of improving the stable supply performance while suppressing the fixation of the granular material. is there.

  In order to achieve the above object, the granular material transport device of the present disclosure is configured as follows.

  According to one aspect of the present disclosure, a granular material conveyance device that conveys and supplies a granular material using a screw, the barrel having an inlet and an outlet of the granular material, and a barrel Provided with a flight having a conveying surface for extruding the powder material in the conveying direction from the inlet to the outlet, and a screw arranged in the inner space of the barrel, and a screw rotation driving device for rotating the screw In the screw, there is provided a granular material conveying device in which a plurality of projecting portions projecting radially outward from the outer periphery of the flight and projecting in the conveying direction from the flight conveying surface are provided along the turning direction of the flight. provide.

  According to the present disclosure, it is possible to provide a granular material transport apparatus capable of improving the stable supply performance while suppressing sticking of the granular material.

Front view (partial cross-sectional view) of the granular material transport device according to the first embodiment of the present disclosure. Side view of granular material conveying apparatus of Embodiment 1 The figure which shows the relationship between the screw and barrel in the granular material conveying apparatus of Embodiment 1, and the structure of a screw. In the screw of FIG. 3, the coil flight is seen from the opposite direction of the conveyance direction Front view of discharge blade of embodiment 1 Side view of discharge blade of embodiment 1 Plane schematic diagram of blade drive motor and discharge blade moving mechanism in the first embodiment Control block diagram in the granular material conveying apparatus of the first embodiment External view of the screw of the granular material conveying apparatus concerning Embodiment 2 of this indication. In the screw shown in FIG. 8, the coil flight is viewed from the opposite direction of the conveyance direction. External view of the screw of the granular material conveying apparatus concerning Embodiment 3 of this indication. In the screw of FIG. 10, the coil flight is viewed from the opposite direction of the conveyance direction.

  The granular material conveying apparatus according to the first aspect of the present disclosure is a granular material conveying apparatus that conveys and supplies the granular material using a screw, and includes an inlet and an outlet for the granular material. A screw provided with a barrel, a flight having a conveying surface for extruding the powdery raw material in the conveying direction from the inlet to the outlet of the barrel, and a screw rotation driving device that rotationally drives the screw. In the screw, a plurality of projecting portions projecting radially outward from the outer periphery of the flight and projecting in the transport direction from the flight transport surface are provided along the turning direction of the flight. is there.

  The granular material conveyance device according to the second aspect of the present disclosure is the apparatus according to the first aspect, wherein the flight protrusion has a length in the radial direction larger than a width in the turning direction.

  The granular material conveying apparatus of the third aspect of the present disclosure is the apparatus of the first or second aspect, wherein the screw is a coil screw.

  The granular material conveyance device according to the fourth aspect of the present disclosure is the device according to the third aspect, wherein the protrusion of the flight is a ring-shaped member fixed to the flight so as to go around the flight cross section of the coil screw. is there.

  According to a fifth aspect of the present disclosure, in the powder conveyance device according to any one of the first to third aspects, the flight protrusion is a rod-shaped member fixed to the flight conveyance surface or the outer peripheral portion. is there.

  The granular material conveyance device according to the sixth aspect of the present disclosure is the device according to the fifth aspect, wherein the plurality of first rod-shaped members protruding in the conveyance direction are fixed to the outer peripheral portion of the flight on the upstream side in the conveyance direction. On the downstream side, a plurality of second rod-like members protruding outward in the radial direction are fixed to the flight conveyance surface.

  According to a seventh aspect of the present disclosure, in any one of the first to sixth aspects, the granular material conveyance device includes a plurality of discharge blades disposed in the vicinity of the discharge port of the barrel so as to face the tip of the screw. In addition, in the internal space of the barrel, there is provided a space for filling the granular material raw material adjacent to the outlet of the barrel and having no screw flight.

  Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings.

(Embodiment 1)
The structure of the granular material conveyance apparatus which conveys the granular material raw material concerning Embodiment 1 of this indication is demonstrated using the apparatus block diagram shown in FIG. 1 and FIG. FIG. 1 is a front view (partially sectional view) of the granular material transport device, and FIG. 2 is a side view of the device.

  As shown in FIGS. 1 and 2, the granular material transport device 1 includes a hopper 2, an agitator 3, an introduction casing 4, a screw 5, a barrel 6, and a discharge casing 7.

  In the granular material conveying apparatus 1 according to the first embodiment, for example, a powder or granular material having a particle size distribution of 0.1 μm to several tens of μm is handled as a granular material. As such granular materials, fine ceramics, metal materials, polymer materials, batteries / electronic materials, composite materials, pharmaceutical materials, food materials, etc., used in various technical fields such as electronics, energy, medical care, foods, etc. Inorganic and organic fine powders and particulates to be used are targeted. The powder material may be a case where a plurality of types of powder materials (materials) are mixed. The granular material raw material also includes irregular shaped granular materials, elongated fibrous materials (for example, short fiber materials), and mixtures (slurries) in which powder and liquid are mixed.

  The hopper 2 is an apparatus for supplying the granular material to the introduction casing 4 that is introduced from an opening portion that opens upward in the drawing and communicates in the lower portion of the drawing. The hopper 2 is releasably connected to the introduction casing 4. For example, the hopper 2 can be separated from the introduction casing 4 during maintenance such as cleaning.

  As described above, the introduction casing 4 is disposed below the hopper 2 and communicates with the first zone of the granular material in the barrel 6 so that the granular material can be introduced. It has a function as a storage container for the granular material for continuously introducing the granular material. The detailed configuration of the barrel 6 will be described later.

  The agitator 3 is a device that stirs the granular material so that partial aggregation such as a bridge does not occur in the granular material introduced into the introduction casing 4. Specifically, the agitator 3 is disposed in the introduction casing 4 and is driven to rotate around a horizontal rotation axis so as to stir the granular material, and a plurality of stirring members 31 (linear members); And an agitator driving device 32 that is arranged outside the introduction casing 4 and integrally rotates the plurality of stirring members 31. In addition, a stirring space 41 in which the granular material in the introduction casing 4 is agitated by the agitating member 31 that is rotationally driven is provided in the introduction casing 4.

  In the introduction casing 4, introduction of the granular material having a substantially U-shaped cross section whose upper part is in communication with the stirring space 41 is further provided in a lower portion of the stirring space 41 in which the stirring member 31 of the agitator 3 is rotated. A space 61 is formed. In the first embodiment, a part that defines the introduction space 61 (hereinafter referred to as a barrel casing 62) is a part of the barrel 6. Furthermore, a powder material feed pipe 63 is connected to the end of the barrel casing 62 so as to communicate with the barrel casing 62. That is, in the first embodiment, the barrel 6 includes a barrel casing 62 that forms an introduction space 61 below the stirring space 41 of the introduction casing 4, and a cylindrical conveyance that extends in communication with the barrel casing 62. The tube 63 is constituted. In the first embodiment, a case where the barrel casing 62 is formed integrally with a part of the introduction casing 4 will be described as an example. However, instead of such a case, the introduction casing 4 And the barrel casing 62 may be formed as separate members.

  The barrel 6 is generally formed in a substantially cylindrical shape, and the barrel casing 62 is opened at the top so that the introduction space 61 and the stirring space 41 are communicated with each other. A coil screw is arranged as a screw 5 in the barrel 6.

  The screw 5 includes, for example, a coil flight 51 formed in a spiral shape having a square cross-sectional shape, and a rotational driving force transmission shaft 52 fixed to an end of the coil flight 51 on the upstream side in the conveying direction of the granular material. Prepare. The screw 5 is rotationally driven in the barrel 6 (that is, the barrel casing 62 and the transfer pipe 63) in a state where a desired gap is secured so that the outer peripheral portion of the coil flight 51 does not contact the inner peripheral surface of the barrel 6. Is done. In addition, although the coil flight 51 demonstrates as an example the case where it has a square cross section, you may employ | adopt other cross-sectional shapes (for example, circular cross section etc.).

  A base end portion (upstream end portion in the transport direction) 52a of the rotational driving force transmission shaft 52 of the screw 5 is disposed so as to penetrate the side surface of the barrel casing 62 in the axial direction. In addition, a screw rotation drive device 57 that rotates the base end portion 52 a of the rotation driving force transmission shaft 52 is provided on the side surface of the barrel casing 62. The screw rotation drive device 57 includes a screw drive motor 58 (see FIG. 2) and a gear box 59 that rotates the screw 5 by converting the drive force of the screw drive motor 58 into a predetermined rotation amount. Yes.

  The downstream end of the conveying pipe 63 in the barrel 6 is a discharge port 63a through which the granular material is discharged from the inside of the barrel 6, and the discharge port 63a communicates with the discharge casing 7.

  In addition, each component in the granular material transport device 1 is supported by a common base 8.

  Next, in the granular material conveying apparatus 1 having such a configuration, the relationship between the screw 5 and the barrel 6 and the structure of the screw 5 will be described in detail with reference to FIG.

  As shown in FIG. 3, the barrel 6 is roughly divided into two zones in the conveying direction. Specifically, as the two zones, the first zone S1 into which the granular material is introduced and the granular material conveyed from the first zone S1 are compressed, and the granular material is barreled. 6 is divided into a second zone S2 for discharging outside. The second zone S2 can also be said to be a zone in which the granular material is transported in the transport pipe 63.

  The first zone S1 is mainly configured by the barrel casing 62 and the portion of the screw 5 surrounded by the barrel casing 62, but may be a case where a part of the transport pipe 63 is included. In the first zone S <b> 1, the powdery raw material stirred by the agitator 3 is introduced into the introduction space 61 formed between the barrel casing 62 and the screw 5 through the hopper 2 and the introduction casing 4. The

  The second zone S <b> 2 is mainly configured by the transport pipe 63 and the part of the screw 5 surrounded by the transport pipe 63. In the second zone S2, the entire periphery of the screw 5 is surrounded by the conveyance pipe 63, and resistance is given to the granular material to be conveyed as will be described later, thereby compressing the granular material. Is given. By compressing the granular material in the second zone S2, quantification and uniformization of the conveyed granular material can be achieved.

  In addition, in the transport pipe 63, the granular material is quantitatively transported toward the discharge port 63a, and is discharged into the discharge casing 7 through the discharge port 63a. In the first embodiment, the pitch and angle of the coil flight 51 of the screw 5 (the angle formed by the axial direction and the coil flight 51) are the same in the first zone S1 and the second zone S2. Note that the pitch and angle of the coil flights 51 of the screw 5 may be different in the first zone S1 and the second zone S2.

  In the second zone S2, a space 65 in which the coil flight 51 of the screw 5 is not formed (that is, a space in which the coil flight 51 does not exist) 65 is disposed adjacent to the discharge port 63a of the transport pipe 63. . In the space 65, the bulk material density in the space 65 can be made uniform by compressing the powder material by applying a resistance to the powder material as will be described later. Therefore, it can be said that this space 65 is a powder material filling space 65.

  Further, as shown in FIG. 3, a plurality of rod-like members 53 are fixed to the spiral coil flight 51 of the screw 5. Specifically, each rod-like member 53 protrudes outward in the radial direction from the outer peripheral surface 51 a that is the outer peripheral portion of the coil flight 51, and protrudes in the conveying direction of the granular material from the conveying surface 51 b of the coil flight 51. It is provided as a protruding part. In the coil flight 51, the surface in the conveyance direction of the granular material is a conveyance surface 51b, and the granular material is conveyed in the conveyance direction so as to be pushed out by the conveyance surface 51b. In addition, in FIG. 1, illustration of the some rod-shaped member 53 is abbreviate | omitted.

  Here, the figure which looked at the coil flight 51 from the conveyance direction reverse direction is shown in FIG. As shown in FIGS. 3 and 4, in the coil flight 51, the respective rod-like members 53 have the same size and shape, for example, and in the turning direction of the coil flight 51, a predetermined interval pitch (angular pitch). ) It is arranged at θ. In the first embodiment, the rod-shaped members 53 are arranged at a predetermined angular pitch θ, for example, at a pitch of 120 degrees.

  The rod-shaped member 53 is, for example, a member having a circular cross section having a smaller cross section than that of the coil flight 51 (rectangular cross section). The rod-shaped member 53 is arranged so that the longitudinal direction thereof is along the radial direction of the coil flight 51. Further, the rod-shaped member 53 has a length dimension in the radial direction of the coil flight 51 (for example, a length dimension in the longitudinal direction) larger than a width dimension in the turning direction of the coil flight 51 (for example, a diameter dimension of a circular cross section). It is formed to become.

  Thus, by providing the some rod-shaped member 53 in the coil flight 51, between the outer peripheral surface 51a of the coil flight 51, and the inner peripheral surface of the barrel 6 (namely, inner peripheral surface of the barrel casing 62 and the conveyance pipe 63). The gap can be partially narrowed. That is, the gap between the rod-shaped member 53 and the inner peripheral surface of the barrel 6 is smaller than the gap between the outer peripheral surface 51 a of the coil flight 51 and the inner peripheral surface of the barrel 6. Furthermore, in the conveyance surface 51b of the coil flight 51, a portion where the rod-shaped member 53 is disposed can be a protruding portion that protrudes in the conveyance direction.

For example, the screw 5 of the first embodiment may be formed in the following dimension example.
Diameter of outer peripheral surface 51a of coil flight 51: φ60mm
Square section of coil flight 51: 10 mm × 10 mm
Outer diameter of rod-shaped member 53: φ3mm x length 13mm
Projection height of rod-shaped member 53 from outer peripheral surface 51a: 3 mm
Projection height of rod-like member 53 from conveyance surface 51b: 3 mm
Inner diameter of barrel 6 inner surface: 70 mm

  As shown in FIG. 1, a plurality of discharge blades 81 are provided in the vicinity of the discharge port 63 a of the transport pipe 63 to discharge the granular material in the discharge pipe 63 from the discharge port 63 a. Here, the details of the discharge blade 81 are shown in FIGS. 5A and 5B. 5A is a front view of the screw 5 viewed in the direction opposite to the conveying direction in the axial direction, and FIG. 5B is a side view.

  As shown in FIG. 1, the plurality of discharge blades 81 are separated from the tip end portion (downstream end portion in the transport direction) of the coil flight 51 of the screw 5 in the vicinity of the discharge port 63 a in the transport pipe 63 of the barrel 6. It is arrange | positioned facing the front-end | tip part. Each discharge blade 81 is connected via a shaft 83 to a blade rotation driving device 82 disposed downstream of the discharge port 63 of the transfer pipe 63 in the transfer direction.

As shown in FIGS. 5A and 5B, the discharge blades 81 are formed of a plate-like member, and the discharge blades 81 are arranged so as to spread radially from the rotation center. Each discharge blade 81 is formed with an outer portion inclined with respect to the central portion in the radial direction, that is, each discharge blade 81 is inclined with respect to a cross section in the axial direction of the transport pipe 63. have. Specifically, each discharge vane 81 is inclined at an outer portion in a direction in which thrust is applied in the conveying (discharge) direction to the powdery raw material existing around by being driven to rotate. In the first embodiment, for example, eight discharge blades 81 are provided at equal intervals. In FIG. 5A, the rotation direction of each discharge blade 81 is the counterclockwise direction shown in the figure, and is the same direction as the rotation direction of the screw 5. 5A and 5B,
The front end portion in the rotation direction of each discharge blade 81 is 81a, and the rear end portion in the rotation direction is 81b.

  The blade rotation driving device 82 includes a shaft 83 connected to the discharge blade 81, and a blade drive motor 84 that is connected to the shaft 83 and rotationally drives each discharge blade 81 via the shaft 83. The blade rotation driving device 82 includes a moving mechanism that moves the discharge blade 81 in the axial direction of the screw 5 together with the blade driving motor 84 and moves it back and forth in the direction intersecting the axial direction of the screw 5.

  Here, details of the moving mechanism of the blade drive motor 84 and the discharge blade 81 will be described with reference to FIG. FIG. 6 is a schematic plan view of the blade drive motor 84 and the discharge blade 81 as viewed from above.

  As shown in FIG. 6A, the blade rotation driving device 82 supports the blade driving motor 84 via the frame 85 and moves the support position of the blade driving motor 84 in the Z direction (vertical direction). A moving mechanism 86 is provided. Further, the blade rotation driving device 82 includes an XY table 87 that supports the Z direction moving mechanism 86 and moves the support position of the Z direction moving mechanism 86 in the X direction and the Y direction. The X direction and the Y direction are horizontal directions, the X direction is the axial direction of the screw 5, and the Y direction is a direction orthogonal to the X direction. The XY table 87 includes an X-direction moving mechanism 88 that moves the support position of the Z-direction moving mechanism 86 in the X direction, and a Y-direction moving mechanism 89 that moves the X-direction moving mechanism 88 in the Y direction. Each moving mechanism can be configured by various known mechanisms such as a ball screw mechanism, a gear mechanism, and a linear slide mechanism. In the first embodiment, the X direction moving mechanism 88 is an example of an axial direction moving device that moves the discharge blade 81 in the axial direction of the screw 5. Further, the Y-direction moving mechanism 89 and the Z-direction moving mechanism 86 are an example of a cross direction moving device that moves the discharge blade 81 in a direction crossing the axial direction of the screw 5.

  Thus, by providing the XY table 87 and the Z direction moving mechanism 86, the discharge blade 81 is moved in the X direction, the Y direction, and the Z direction with respect to the discharge port 63a in the transport pipe 63 of the barrel 6. It becomes possible. For example, by moving the discharge blade 81 in the X direction by the X direction moving mechanism 88 from the state shown in FIG. 6A, as shown in FIG. The discharge vanes 81 can be moved away from each other. Further, the discharge vane 81 can be moved in the Z direction by using the Z direction moving mechanism 86, and the discharge vane 81 can be moved in the Y direction by using the Y direction moving mechanism 89. Therefore, the position of the discharge blade 81 with respect to the discharge port 63a of the transport pipe 63 can be freely set in the X direction, the Y direction, and the Z direction within the moving range of each moving mechanism.

  Next, the control block diagram in the supply apparatus 1 is shown in FIG. As shown in FIG. 7, the supply device 1 includes a control device 90.

  The control device 90 controls the rotation driving operation of the screw 5 by the screw rotation driving device 57. For example, the control device 90 controls the screw rotation driving device 57 so that the screw 5 is rotationally driven at a rotation speed (rotation amount) set in advance in the control device 90 or a command rotation speed input from the outside. .

  Further, the supply device 1 is provided with a motor current detection unit 91 that detects a drive current value of the screw drive motor 58 in the screw rotation drive device 57. The drive current value of the screw drive motor 58 detected by the motor current detector 91 is input to the control device 90. The control device 90 performs control based on the drive current value of the screw drive motor 58 detected by the motor current detection unit 91 when controlling the rotation drive operation of the discharge blade 81 by the blade rotation drive device 82.

  For example, when the drive current value of the screw drive motor 58 is higher than the set value, the control device 90 determines that the degree of compression of the granular material in the barrel 6 is high, and discharge vanes 81. The number of rotations is increased so as to promote the discharge of the powdery raw material to reduce the degree of compression. Further, for example, when the drive current value of the screw drive motor 58 is lower than the set value, the control device 90 determines that the degree of compression of the granular material in the barrel 6 is low, and discharges it. The number of rotations of the blades 81 is decreased to suppress discharge of the granular material and increase the degree of compression.

  In the supply apparatus 1 according to the first embodiment having such a configuration, an operation (a method for supplying the granular material) of conveying and supplying the granular material will be described.

  First, when a granular material is introduced into the hopper 2, the charged granular material is introduced into the introduction casing 4. In the stirring space 41 of the introduction casing 4, the agitator driving device 32 integrally rotates the plurality of stirring members 31 to stir the powder material, thereby suppressing partial aggregation such as a bridge. Is done. At the same time, the granular material is introduced into the first zone S 1 in the barrel 6.

  In the first zone S <b> 1, the screw 5 is disposed in the barrel casing 62, and the introduced granular material is introduced between the coil flights 51 of the screw 5. The screw 5 is rotationally driven by a screw rotation drive device 57, and the granular material raw material introduced between the coil flights 51 is conveyed along the axial direction by the rotational drive of the screw 5 to the second zone S2. Head.

  In the second zone S2, the granular material material conveyed from the first zone S1 is conveyed along the axial direction by the rotational drive of the screw 5. In the second zone S2, a plurality of discharge blades 81 are provided in the vicinity of the discharge port 63a of the transport pipe 63, so that the discharge blades 81 become a resistance and apply a compressing action to the conveyed granular material. Can do. By compressing the granular material in this way, the bulk density of the granular material can be kept uniform in the space 65.

  Further, the powder raw material is cut off by bringing the edge of the discharge blade 81 into contact with the powder raw material by rotational driving of the plurality of discharge blades 81 provided in the vicinity of the discharge port 63a of the transport pipe 63. Can be dispersed. At the same time, the outward thrust of the discharge port 63a is given to the granular material at the inclined portion of each discharge blade 81. Due to the action of the axial thrust and the radial centrifugal force, the powder material is quantitatively discharged into the discharge casing 7 from the discharge port 63a in a uniformly dispersed state.

  Furthermore, in such supply of the granular material, the drive current value of the screw drive motor 58 detected by the motor current detector 91 is input to the control device 90. When the controller 90 determines that the drive current value of the screw drive motor 58 is higher than the set value, the controller 90 determines that the degree of compression of the granular material in the barrel 6 is high, and discharges it. The blade rotation driving device 82 is controlled so as to increase the rotation speed of the blade 81. Thereby, discharge | emission of the granular material raw material from the discharge port 63a of the conveyance pipe 63 is accelerated | stimulated, and the degree of compression of a granular material raw material can be reduced. Further, when the controller 90 determines that the drive current value of the screw drive motor 58 is lower than the set value, it is determined that the degree of compression of the granular material in the barrel 6 is low. The blade rotation driving device 82 is controlled so as to decrease the rotation speed of the discharge blade 81. Thereby, discharge | emission of the granular material raw material from the discharge port 63a of the conveyance pipe 63 is suppressed, and the degree of compression of a granular material can be raised. Thereby, the compression degree of the granular material raw material in the front-end | tip part 51b of the screw 5 can be adjusted.

  In addition, in the supply apparatus 1, when the supply of the granular material is started, for example, the rotational drive of the discharge blade 81 is stopped for a certain period or the rotational speed is decreased, so that the granular material in the transport pipe 63 is used. You may make it accelerate | stimulate the filling of the granular material raw material to the space 65 for raw material filling. The maximum rotation speed of the discharge blade 81 by the blade rotation driving device 82 is set larger than the maximum rotation speed of the screw 5 by the screw rotation driving device 57.

  In addition, when the specification and type of the granular material to be handled are changed in the supply device 1, the discharge blade 81 for the discharge port 63 a of the transport pipe 63 is used by using the XY table 87 and the Z-direction moving mechanism 86. Are adjusted in the X, Y, and Z directions.

  For example, the discharge blade 81 may be moved in the X direction (the axial direction of the screw 5) in order to adjust the degree of compression required in the granular material. By positioning the discharge blade 81 on the upstream side in the X direction, the degree of compression of the granular material can be increased, and by positioning the discharge blade 81 on the downstream side in the X direction, the degree of compression of the granular material. Can be lowered. When a granular material having a special form such as a short fiber material is used, the discharge blade 81 is moved in the Y direction or the Z direction so that the rotation center of the discharge blade 81 is eccentric from the axis of the screw 5. Thereby, the discharge | emission property (cut-off property) of a granular material raw material can be improved. The discharge blade 81 may be positioned on the inner side (that is, upstream in the X direction with respect to the discharge port 63a) than the discharge port 63a of the transport pipe 63. You may arrange | position so that it may straddle.

  The coil flight 51 is provided with a plurality of rod-like members 53 at a predetermined angular pitch. First, the rod-shaped member 53 is provided so as to protrude from the outer peripheral surface 51 a of the coil flight 51, so that the granular material that is to adhere to the inner peripheral surface of the barrel 6 is scraped and adhered by the rod-shaped member 53. Can be destroyed. Thereby, accumulation and adhesion of the granular material on the inner peripheral surface of the barrel 6 can be suppressed.

  In addition, by providing the rod-like member 53 so as to protrude from the conveyance surface 51 b of the coil flight 51, it is possible to suppress slipping of the granular material raw material that tries to slide on the conveyance surface 51 b due to the rotation of the coil flight 51. Therefore, the propulsive force in the conveying direction with respect to the granular material can be relaxed, and the granular material in the barrel 6 can be moved in the circumferential direction to be uniformly filled between flights. As a result, the supply accuracy can be improved, and the formation of a powder lump between flights can be prevented.

  In addition, since the plurality of discharge blades 81 are provided in the vicinity of the discharge port 63 a of the transport pipe 63, resistance can be given to the granular material in the space 65. At the same time, the powder material can be discharged from the discharge port 63a while dispersing the powder material by applying an outward thrust to the powder material at the inclined portion of the discharge blade 81. Therefore, it is possible to improve the quantitativeness and uniformity of the granular material that is conveyed and supplied.

(Embodiment 2)
FIG. 8 shows an external view of the screw 105 provided in the powder particle conveyance device according to the second embodiment of the present disclosure. In addition, in the screw 105 of this Embodiment 2, the same reference number is attached | subjected to the same structure as the structure with which the above-mentioned Embodiment 1 is provided, and the description is abbreviate | omitted.

  As shown in FIG. 8, the screw 105 according to the second embodiment includes a coil flight 151 having the same shape as that of the first embodiment and the coil flight 51. A plurality of first rod-like members 152 and a plurality of second rod-like members 153 are fixed to the coil flight 151 as a plurality of rod-like members.

  As with the rod-shaped member 53 of the first embodiment, the first rod-shaped members 152 are arranged at a predetermined angular pitch so that the longitudinal direction thereof is along the radial direction of the coil flight 151. The 1st rod-shaped member 152 is being fixed to the conveyance surface 151b so that it may protrude from the outer peripheral surface 151a of the coil flight 151, and may protrude from the conveyance surface 151b.

  The second rod-like members 153 are arranged at a predetermined angular pitch such that the longitudinal direction thereof is along the axial direction of the coil flight 151 (that is, the conveying direction in the barrel 6). The second rod-like member 153 is fixed to the outer peripheral surface 151 a so as to protrude from the outer peripheral surface 151 a of the coil flight 151 and to protrude from the back surface 151 c of the conveying surface 151 b in the coil flight 151.

  Here, the figure which looked at the coil flight 151 from the conveyance direction reverse direction is shown in FIG. As shown in FIGS. 8 and 9, in the coil flight 151, the first rod-like member 152 and the second rod-like member 153 have, for example, the same size and shape, for example, a round rod-like member having a circular cross section. It is. Moreover, the 1st rod-shaped member 152 is arrange | positioned by 120 degree pitch as predetermined angle pitch (theta) in the turning direction of the coil flight 151, for example. The second rod-shaped member 153 is arranged at a predetermined angular pitch θ in the turning direction of the coil flight 151, for example, at a pitch of 120 degrees, and the second rod-shaped member 153 is not overlapped with the first rod-shaped member 152. Are arranged shifted by 60 degrees (θ / 2).

  According to the second embodiment, the coil flight 151 is provided with the first rod-shaped member 152 and the second rod-shaped member 153 having different longitudinal directions as rod-shaped members. By providing the 1st rod-shaped member 152, the stable supply property can be improved, suppressing sticking of the granular material raw material to the inner peripheral surface of the barrel 6 as in the first embodiment. Further, by providing the second rod-shaped member 153 so that the longitudinal direction is different from the first rod-shaped member 152, while further suppressing the fixation of the granular material on the inner peripheral surface of the barrel 6, The stirrability of the powder material can be improved. Thus, the quantitative property in conveyance of a granular material raw material can be improved by improving the stirring property with respect to a granular material raw material.

  Moreover, both the 1st rod-shaped member 152 and the 2nd rod-shaped member 153 have a sticking suppression function of the granular material raw material to the inner peripheral surface of the barrel 6. The first rod-shaped member 152 has a higher conveying function of the granular material than the second rod-shaped member 153, and the second rod-shaped member 153 has a higher stirring function of the granular material than the first rod-shaped member 152. Using such a feature, for example, the second rod-like member 153 may be provided on the upstream side in the conveying direction of the screw, and the first rod-like member 152 may be provided on the downstream side. By adopting such a configuration, the stirring function can be enhanced by the second rod-shaped member 153 on the upstream side of the screw, which is strongly required to be stirred with respect to the granular material. On the other hand, on the downstream side of the screw in which the quantitative transportability of the granular material is required, the first rod-shaped member 152 can improve the stable supply performance.

(Embodiment 3)
FIG. 10 shows an external view of the screw 205 included in the powder particle conveyance device according to the third embodiment of the present disclosure. In addition, in the screw 205 of the third embodiment, the same components as those of the first and second embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 10, the screw 205 of the present embodiment includes a coil flight 251 having the same shape as the coil flight 51 of the first embodiment. On the other hand, the coil flight 251 is provided with a ring-shaped member instead of a rod-shaped member, and is different from the first and second embodiments in that a protrusion is formed by this ring-shaped member. Hereinafter, this difference will be mainly described.

  As shown in FIG. 10, the coil flight 251 is provided with a plurality of ring-shaped members 252 so as to go around the flight cross section. That is, a plurality of ring-shaped members 252 are fixed in a state of being fitted to the coil flights 251 so that the coil flights 251 pass through the openings of the ring-shaped members 252.

  Here, the figure which looked at the coil flight 251 from the conveyance direction reverse direction is shown in FIG. As shown in FIGS. 10 and 11, the plurality of ring-shaped members 252 are formed with the same shape and size, for example, and in the turning direction of the coil flight 251, a predetermined angular pitch θ (for example, a 120-degree pitch). ). The ring-shaped member 252 has a posture such that its annular surface is substantially orthogonal to the spiral extending direction of the coil flight 251.

  By providing the plurality of ring-shaped members 252 in this way, the ring-shaped member 252 is a protruding portion that protrudes from the outer peripheral surface 251a of the coil flight 251 and also protrudes from the conveying surface 251b. Since the ring-shaped member 252 is provided so as to go around the flight cross section, it also protrudes from the inner peripheral surface 251c of the coil flight 251 and the back surface 251d of the transport surface 251b. That is, the ring-shaped member 252 forms a protruding portion that protrudes from the entire periphery of the flight cross section.

  According to the third embodiment, the plurality of ring-shaped members 252 are provided so as to go around the flight cross section of the coil flight 251, thereby suppressing the adhesion of the granular material to the inner peripheral surface of the barrel 6. However, stable supply can be improved. Furthermore, since the ring-shaped member 252 forms a protruding portion that continuously protrudes over the entire periphery of the flight cross section, the effect of suppressing the sticking of the granular material to the inner peripheral surface of the barrel 6 and the stable supply performance The improvement effect can be further enhanced.

  In the description of the above-described embodiment, an example in which a coil screw is employed as a screw has been described as an example, but any type of screw may be used. For example, a full flight type screw may be employed as the screw. Moreover, you may take various specifications also about the screw thread number of a screw.

  Further, in the turning direction of the screw, as an example, a case where the protruding portions are provided at a pitch of 120 degrees, for example, as the predetermined angular pitch θ is exemplified. However, the angular pitch may be set to various values. Moreover, it is not restricted to the case where it provides with the same angular interval, The case where it provides with a different angular interval may be sufficient.

  Moreover, although the case where the some discharge blade | wing 81 was provided in the discharge port 63a vicinity of the conveyance pipe 63 was mentioned as an example, the structure in which the discharge blade | wing 81 is not provided may be employ | adopted. Further, when the discharge blade is provided, a configuration may be adopted in which the discharge blade is fixed to one end of the screw and the discharge blade is rotationally driven together with the screw.

  It is to be noted that, by appropriately combining any of the above-described various embodiments, the effects possessed by them can be produced.

DESCRIPTION OF SYMBOLS 1 Powder raw material conveyance apparatus 2 Hopper 3 Agitator 31 Stirring member 32 Agitator drive apparatus 4 Introducing casing 41 Stirring space 5 Screw 51 Coil flight 51a Outer peripheral surface 51b Conveying surface 52 Rotation driving force transmission shaft 52a Base end 53 Rod-shaped member 57 Screw rotation drive device 58 Screw drive motor 59 Gear box 6 Barrel 61 Introduction space 62 Barrel casing 63 Conveying pipe 63a Discharge port 65 Powder material filling space (space)
7 Discharge casing 81 Discharge vane 81a Rotation direction front end portion 81b Rotation direction rear end portion 82 Blade rotation drive device 83 Shaft 84 Blade drive motor 85 Frame 86 Z direction movement mechanism 87 XY table 88 X direction movement mechanism 89 Y direction movement mechanism 90 Control device 152 First rod member 153 Second rod member 252 Ring member S1 First zone S2 Second zone

Claims (7)

A granular material conveying device that conveys and supplies granular material using a screw,
A barrel having an inlet and an outlet for the powder material;
A screw having a conveying surface for extruding the powdery raw material in the conveying direction from the inlet of the barrel toward the outlet, and a screw disposed in the internal space of the barrel;
A screw rotation drive device that rotationally drives the screw,
In the screw, the granular material conveying apparatus in which a plurality of projecting portions projecting radially outward from the outer periphery of the flight and projecting in the transport direction from the flight transport surface are provided along the flight turning direction.   The granular material conveying apparatus according to claim 1, wherein the protruding portion of the flight has a length dimension in a radial direction larger than a width dimension in a turning direction.   The granular material conveying apparatus according to claim 1 or 2, wherein the screw is a coil screw.   The granular material conveying apparatus according to claim 3, wherein the projecting portion of the flight is a ring-shaped member fixed to the flight so as to go around the flight cross section of the coil screw.   4. The granular material conveying apparatus according to claim 1, wherein the protruding portion of the flight is a rod-like member fixed to a conveying surface or an outer peripheral portion of the flight. 5. On the upstream side in the transport direction, a plurality of first rod-shaped members protruding in the transport direction are fixed to the outer peripheral portion of the flight,
The granular material conveying apparatus according to claim 5, wherein a plurality of second rod-shaped members protruding radially outward are fixed to a flight conveying surface on the downstream side in the conveying direction. In the vicinity of the outlet of the barrel, further provided with a plurality of discharge blades arranged to face the tip of the screw,
The granular material conveying apparatus according to any one of claims 1 to 6, wherein in the internal space of the barrel, a powder material raw material filling space adjacent to the discharge port of the barrel and free of screw flight is provided. .

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