JP2006232537A - Vibration type powder and grain discharge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration type powder and grain discharge device capable of preventing flushing of powder and grain having high flushing performance, without reducing discharge capacity. <P>SOLUTION: This vibration type powder and grain discharge device is arranged on the lower side of a storage device for storing the powder and grain, and discharges the powder and grain stored in the storage device, and has a body having a discharge port on a bottom surface, a barrier member arranged on the storage device side of the discharge port inside of the body, projecting to the storage device side and having an outer diameter larger than a opening diameter of the discharge port, an excitation means for imparting predetermined vibration to the body, and a control part for controlling the excitation means, and has at least one flow restraining means arranged around the discharge port of the bottom surface of the body, guiding the flowing direction of the powder and grain and decelerating a flow of the powder and grain, for solving the problem. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an oscillating powder particle discharging apparatus that discharges powder particles from a container by applying vibration to the container.

Conventionally, discharge devices such as a circle feeder and a table feeder have been known as discharge devices for powder particles, but as a device for discharging (cutting out) powder particles from the bottom of a silo (tank) for storing powder particles. In general, a vibratory granular material discharging device called a vibro discharger (VD) is used.
Here, the vibratory granular material discharging device is basically a device that is provided at the bottom of the silo, vibrates the vicinity of the discharge port for discharging the granular material, and discharges the granular material, as shown below. Various devices have been proposed (Patent Literature 1, Patent Literature 2, Patent Literature 3 and Patent Literature 4).

FIG. 7 is a cross-sectional view illustrating a schematic configuration of the vibration feeder 200 disclosed in Patent Document 1. As illustrated in FIG.
The vibratory feeder 200 is attached to the bottom of the tank 202 via a suitable elastic member 204, and from a funnel member 206 and an upwardly convex or conical barrier member 208 disposed concentrically thereabove. It is configured. The funnel member 206 includes an upper inclined wall portion 215, a horizontal annular portion 212, and a lower inclined wall portion 214. An upper end portion 216 of the upper inclined wall portion 215 and a lower end portion 218 of the lower inclined wall portion 214 are formed vertically so that the tank 202 and a screw feeder (not shown) can be easily connected to each other. Further, the outer diameter of the horizontal annular portion 212 is smaller than the diameter of the lower end portion of the barrier member 208. By applying vibration to such a vibration feeder 200 by appropriate vibration means not shown in the drawing, the fluidized powder particles flow out in the direction of the arrow.

Further, in the cited document 2, an upper cylinder part having an opening at the lower end, a hopper support column for fixing and supporting the upper cylinder body on the floor (ground), and a lower cylinder part are provided. A conical lower cone part, a suspension mechanism that suspends the lower cone part from the upper cylindrical part in a freely swinging state, and a rocker that is mounted on the outer peripheral edge of the lower cone part and at two opposite positions in the radial direction. It consists of a vibration generator such as a dynamic motor. Further, in the above configuration, the upper cylindrical body portion is provided with a bridge preventing cone at the center portion, while the lower end thereof is connected to the lower cone portion via an annular connecting body made of a flexible material such as canvas. A vibratory hopper is disclosed.
In the vibrating hopper of Patent Document 2, by vibrating the lower hopper, even if a bridge is generated in the hopper body, the bridge easily collapses and is smoothly discharged from the material discharge port. It is disclosed that the discharge can be made even smoother by having a bridge prevention cone in the case.
Patent Document 3 discloses a material flow promoting device in which barrier members are concentrically spaced apart from each other and arranged at two locations.

  Further, in Patent Document 4, it is not necessary to close the discharge opening every time after the material supply is stopped, and a discharge opening extending in one direction is provided at the bottom for the purpose of providing a vibration hopper that is preferable in terms of vibration and structural strength. A hopper body that is formed and supported so as to vibrate; a material direct pressure receiving plate that extends parallel to the discharge opening and is fixed to the hopper body above the discharge opening; and a direction in which the material direct pressure receiving plate extends. A material direct pressure receiver comprising a vibrator attached to the hopper body to give a vibration force, and a pair of gate plates slidable with respect to the bottom of the hopper body and disposed on both sides of the discharge opening The straight line drawn from both side edges of the plate to both side edges of the discharge opening can be adjusted so that the angle formed with respect to the horizontal line is smaller than the angle of repose of the material stored in the hopper body. Vibrating hopper is disclosed It has been.

JP 59-223628 A JP 56-57668 A JP-A-56-161973 JP 59-108627 A

In this way, by vibrating the discharging device itself at the time of discharging the granular material, the granular material can be prevented from forming a bridge and the like, and the granular material can be discharged efficiently.
Now, especially in the food manufacturing industry, so-called multi-product manufacturing, in which different products are made on one production line, is increasing, and storage tanks are stored in silos (tanks) corresponding to the production line according to the products to be produced. Often, the type of granular material to be changed is also changed. Therefore, the vibratory granular material discharging apparatus needs to cope with various granular materials stored in the silo, highly flushing granular material, and conversely, low flushing granular material. Here, the flushing means that the granular material behaves like a liquid, and if the flow path is connected, the granular material passes through the apparatus and flows out from the discharge port.

However, in the case of storing a powder body having high flushing properties, the discharge devices disclosed in Patent Document 1, Patent Document 2 and Patent Document 3 cannot prevent flushing and cannot escape, so another stage is used in the subsequent stage. It was necessary to provide a shielding device. As a means often used as the shielding device, there is one that places a screw conveyor directly under the discharging device. As a result, unless the screw conveyor is activated, the powder particles stay in the trough of the screw conveyor and can prevent flushing, but an extra device called a screw conveyor is required.
Further, in the discharge devices disclosed in Patent Document 1, Patent Document 2, and Patent Document 3, flushing is prevented by bringing the lower end of the barrier member close to the bottom opening, but the interval between the barrier member and the bottom opening is increased. Since it cannot be changed, there is a problem in that the discharge capacity is lowered when the gap is set at a narrow interval that can prevent the flushing of the highly flushing granular material.

  Moreover, the vibration hopper disclosed in Patent Document 4 can adjust the gap between the side edge (discharge port) of the gate plate and the material direct pressure receiving plate (barrier member) by adjusting the position of the gate plate. It can be applied to various materials. However, it is necessary to fix the position of the gate plate with the nut, so it is difficult to adjust the position, and the process of loosening the nut, adjusting the position of the gate plate, and tightening the nut is done manually. There is a problem that must be done.

Furthermore, in order to store different types of granular material according to the product to be manufactured in the same silo as described above, complete cleaning is required when changing the type of granular material stored from the viewpoint of preventing contamination. There is a case.
However, once the vibratory granular material discharge device disclosed in the above patent document is connected to the silo, the silo and the vibrating granular material discharge device have a sealed structure, and the device itself is heavy, so the device itself There is also a problem that it is very time-consuming and difficult to remove and clean.

  In addition, since the vibratory granular material discharge device disclosed in the above-mentioned patent document does not have a function of adjusting the discharge amount, a discharge amount adjustment device that controls the discharge amount of the granular material such as a screw conveyor is provided at the subsequent stage. It was installed. For this reason, there exists a problem that an apparatus structure becomes complicated and apparatus cost starts.

The first object of the present invention is to provide a vibratory granular material discharging apparatus capable of solving the above-mentioned problems of the prior art and preventing the flushing of a highly flushing granular material without reducing the discharging capacity. There is to do.
The second object of the present invention is to provide a vibratory granular material discharging apparatus capable of easily cleaning the inside of the apparatus.
Furthermore, the third object of the present invention is to provide a vibratory granular material discharge device capable of adjusting the discharge amount without using a device for adjusting the discharge amount such as a screw conveyor.

In order to achieve the first object, the present invention provides a vibratory granular material discharging apparatus that is disposed below a storage tank device for storing powder particles and discharges the granular material stored in the storage tank device. And a main body having a discharge port on the bottom surface, and disposed on the storage device side of the discharge port inside the main body, and has an outer diameter that is convex toward the storage device side and larger than the opening diameter of the discharge port. A barrier member, a vibrating means for applying a predetermined vibration to the main body, and a control unit for controlling the vibrating means, arranged around the discharge port on the bottom surface of the main body, and flowing direction of the granular material The vibratory granular material discharging apparatus is provided, characterized in that it includes at least one flow restricting means for decelerating the flow of the granular material.
Here, in the present invention, the flow restricting means usually refers to a plate-like member that is disposed perpendicularly to the bottom surface of the main body at a predetermined interval.
Moreover, it is preferable that the said flow control means is arrange | positioned on the tangent of the said discharge port.
Furthermore, it is preferable that the main body has a structure that can be separated into an upper part and a lower part.
Further, a fulcrum portion serving as a rotation axis is provided at a predetermined portion of the outer wall of the upper portion and the lower portion, and the upper portion and the lower portion are parallel to the contact surface between the upper portion and the lower portion with the fulcrum portion as a rotation axis. It is preferable that the upper part and the lower part can be separated by relatively rotating in any direction.

Moreover, it is preferable that the said control part adjusts the vibration frequency of the said vibration means, and controls discharge amount.
Further, the control unit vibrates the main body in the same direction as the direction of vibration when discharging the granular material for a predetermined time after the supply of the granular material from the opening of the storage tank is stopped, and then discharges the granular material. It is preferable to control the exciting means so that the main body is vibrated in a direction opposite to the direction in which vibration is sometimes performed.

  In order to achieve the second object, the present invention provides a vibratory granular material discharging apparatus which is disposed below a storage tank device for storing powder particles and discharges the granular material stored in the storage tank device. And a main body having a discharge port on the bottom surface, and disposed on the storage device side of the discharge port inside the main body, and has an outer diameter that is convex toward the storage device side and larger than the outer diameter of the discharge port. It has a barrier member, an excitation means for applying vibration of a predetermined frequency to the main body, and a control unit for controlling the vibration means, and the main body has a structure that can be separated into an upper part and a lower part. Provided is a vibratory granular material discharging device.

  In order to achieve the third object, the present invention provides a vibratory granular material discharging apparatus that is disposed below a storage tank device for storing powder particles and discharges the granular material stored in the storage tank device. And a main body having a discharge port on the bottom surface, and disposed on the storage device side of the discharge port inside the main body, and has an outer diameter that is convex toward the storage device side and larger than the outer diameter of the discharge port. A barrier member, an excitation unit that applies vibrations of a predetermined frequency to the main body, and a control unit that controls the excitation unit, wherein the control unit adjusts the excitation frequency of the excitation unit and discharges it. Provided is a vibratory granular material discharging device characterized in that the amount is controlled.

  According to the present invention, it is possible to prevent flushing even when the distance between the bottom surface of the barrier member and the discharge port is larger than the conventional one by providing the current suppressing means on the bottom surface of the main body of the vibratory granular material discharge device, Furthermore, the distance between the bottom surface of the barrier member and the discharge port can be made larger than before, and the discharge flow rate can be maintained above a certain level. That is, flushing can be reduced without reducing the discharge capacity and even a powder with high flushing properties.

  Moreover, according to this invention, an internal cleaning can be performed easily by making the main body of a vibration type granular material discharge | emission apparatus separable into an upper part and a lower part.

  Furthermore, according to the present invention, it is possible to discharge a necessary amount of powder and granular materials by adjusting the excitation frequency of the vibration means and adjusting the discharge amount. That is, the discharge amount can be adjusted without using a device for adjusting the discharge amount such as a screw conveyor.

  Hereinafter, the vibratory granular material discharging apparatus of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

  FIG. 1 is a schematic diagram showing a schematic configuration of a granular material cutting apparatus 10 in which a vibrating granular material discharging apparatus (hereinafter also simply referred to as a discharging apparatus) according to an embodiment of the present invention is attached to a silo.

  The granular material cutting device 10 includes a silo 12 in which the granular material is stored, a discharge device 14 that discharges the granular material stored in the silo 12, a support 16 that supports the silo 12 and the discharge device 14, and It has the vibration isolator 20 which connects the discharge device 14 and the support body 16, and the flexible connection member 22 which connects the silo 12 and the discharge device 14.

  The silo 12 has, for example, a cylindrical shape with a predetermined diameter and a predetermined height on the upper side, and a funnel shape whose diameter gradually decreases toward the bottom. Further, the lower end of the funnel shape, that is, the bottom of the silo 12 is an opening having a predetermined diameter, and although not shown, a charging port for charging the granular material is formed at the top. The granular material charged from this charging port is stored inside the silo 12. In addition, the silo 12 may be a uniform cylindrical shape having no funnel shape on the lower side. Further, the silo 12 includes a slide gate at the opening at the bottom, and opens and closes the slide to switch the supply state and supply stop state of the granular material to the discharge device 14.

  As shown in FIG. 1, the discharge device 14 according to the embodiment of the present invention has an opening having substantially the same shape as the opening at the bottom of the silo 12 on the upper surface, and the opening is connected to the silo via the connection member 22. 12 is connected to the opening at the bottom. In this way, the discharge device 14 is connected to the opening at the bottom of the silo 12 via the connection member 22, and the granular material stored in the silo 12 passes through the opening at the bottom of the silo 12 and the inside of the connection member 22. It passes and is supplied to the discharge device 14. Furthermore, the granular material is discharged from the discharge device 14 by vibrating the discharge device 14. The discharge device 14 of the present invention will be described in detail later with reference to FIGS.

The support 16 supports the silo 12 at a predetermined position, and supports the discharge device 14 via the vibration isolator 20.
Here, the vibration isolator 20 is composed of a vibration isolator rubber or the like, and suppresses transmission of vibration from the discharge device 14 to the support 16.

  The connecting member 22 is formed of a flexible material having low rigidity such as cloth, and has a straight body shape having a diameter larger than that of the opening at the bottom of the silo 12. The opening on the upper side of the connecting member 22 defines the opening at the bottom of the silo 12. The lower opening is connected to an opening formed on the upper surface of the discharge device 14. Thereby, the granular material discharged | emitted from the opening part of the bottom part of the silo 12 can be sent into the discharge device 14 without leaking outside. Furthermore, it can suppress that the vibration of the discharge device 14 is transmitted to the silo 12 by being formed of a material having low rigidity.

  As described above, the discharge device 14 is connected to other members via the connection member 22 and the vibration isolation device 20. Thereby, the discharge device 14 is in a floating state in which vibration generated in the discharge device 14 is not transmitted to the outside, and the silo 12 and the support 16 can be prevented from being vibrated by the vibration of the discharge device 14. .

Next, the vibratory granular material discharging apparatus 14 according to an embodiment of the present invention will be described in detail.
FIG. 2 is a schematic top view showing a schematic configuration of the vibratory granular material discharging apparatus 14, and FIG. 3 is a cross-sectional view taken along the line II-II in FIG.

  The vibratory granular material discharging device 14 is disposed below the silo 12 and discharges the granular material stored in the silo 12. The upper main body 30 of the upper part of the main body divided into two upper and lower parts. A lower body 32 of the lower part, a barrier member 34 arranged inside the upper body 30 and guiding the powder particles from the center to the outside, and a vibration means 36 for vibrating the upper body 30 and the lower body 32, A baffle plate 38 disposed on the bottom surface of the lower main body 32 to prevent the powder particles from flowing out, an opening / closing means 40 for opening and closing the upper main body 30 and the lower main body 32, and sealing between the upper main body 30 and the lower main body 32. And a sealing member 42 to be used.

The upper main body 30 has a cylindrical shape having a diameter substantially the same as the opening at the bottom of the silo 12 described above, and is disposed concentrically with the opening at the bottom of the silo 12 below the bottom of the silo 12. ing. The upper opening of the upper body 30 is connected to the opening at the bottom of the silo 12 via the connection member 22.
Further, the upper main body 30 includes a receiving plate 56 that is spaced apart from the outer wall by a predetermined distance, and is fixed to the support 16 described above via the vibration isolator 20.

The lower main body 32 includes an opening having an inner diameter equal to the inner diameter of the straight body portion of the upper main body 30 on the upper surface, and a discharge port 50 having an opening smaller than the opening of the upper main body 30 on the bottom surface, and the bottom surface is flat. It has a container shape and is fixed to the upper main body 30 by a fastening bolt 76 described later. The lower main body 32 has a curved shape at the connection portion between the side surface and the bottom surface, and has a smooth shape without corners.
Moreover, the upper main body 30 and the lower main body 32 of this embodiment have a flange part on the outer side of each contact surface.
Here, the shapes of the upper main body 30 and the lower main body 32 are not limited to the present embodiment, and the shape gradually decreases in diameter from the silo 12 toward the discharge port 50, and the bottom surface of the lower main body is inclined at a predetermined angle. It can be in various shapes such as a funnel shape.

  The barrier member 34 is provided inside the upper main body 30 and includes a baffle plate 60 and a stay 62. The baffle plate 60 is convex to the silo 12 side (upper side in FIG. 3) and has a conical shape whose outer diameter on the bottom surface is larger than the opening diameter of the discharge port 50. It is supported by a stay 62 provided toward the top and is disposed concentrically with the upper body 30 inside the upper body 30.

In the present embodiment, the barrier member has a conical shape, but is not limited thereto, and may be any shape as long as it protrudes upward, and may have various shapes such as a hemispherical shape and a streamline shape.
By providing such a barrier member 34, the granular material supplied from the silo 12 is moved outside the vertical extension line of the discharge port 50, and then the bottom surface of the barrier member 34 and the discharge port 50. It is discharged from the formed space.

Here, if the angle formed by the line connecting the outer edge of the bottom surface of the barrier member 34 and the discharge port 50 and the bottom surface of the lower body 32 is smaller than the angle of repose of the granular material, Even when the granular material is filled, when the granular material is not discharged, the inclination angle formed by the granular material around the discharge port 50 becomes an angle less than the repose angle, and the granular material around the discharge port 50 A body accumulates stably and a granular material is not discharged | emitted from the discharge port 50. FIG.
As described above, the barrier member 34 is provided above the discharge port 50, and the distance and size between the barrier member 34 and the discharge port 50 are set to predetermined values, so that the discharge port 50 is not provided with a slide gate. It is possible to prevent the discharge of the granular material from the.

The vibration means 36 vibrates the upper body 30 and the lower body 32 (in this embodiment, a vibration motor), and is installed on the outer wall of the upper body 30.
When the upper body 30 is vibrated by the vibration means 36, the entire discharge device 14 vibrates. As the discharge device 14 vibrates, the powder particles stably deposited around the discharge port 50 at an angle less than the repose angle are also vibrated, and the powder particles are discharged from the discharge port 50.
A control unit 80 is connected to the vibration means 36. The control unit 80 controls the vibration frequency, rotation direction, and the like of the vibration means 36.
Here, in the present embodiment, one vibration motor is installed in the upper body 30 as the vibration means 36. However, the present invention is not limited to this, and a plurality of vibration motors may be installed. It is not limited to 30 and may be installed in the lower main body 32. The vibration means is not limited to a vibration motor, and conventionally known vibration means such as an electromagnetic vibrator can be used.

Next, the flow control plate 38 that is a feature of the present invention will be described in detail.
The baffle plate 38 is composed of a plate-like member, and six sheets are arranged at equal intervals on the circumference around the discharge port 50 in the tangential direction of the edge of the discharge port 50, perpendicular to the bottom surface of the lower main body 32. ing. The baffle plate 38 has a linear shape in which the upper side is parallel to the bottom surface of the baffle plate 60, and the lower side is joined to the bottom surface and side surfaces of the lower body 32.

By providing such a flow restricting plate 38 on the bottom surface of the lower main body 32, the powder particles in the lower main body 32 move along the flow restricting plate 38, and the flow velocity of the powder particles is reduced. As a result, the distance between the bottom surface of the baffle plate 60 and the discharge port 50 is larger than before, and the angle formed between the line connecting the outer edge of the bottom surface of the baffle plate 60 and the discharge port 50 and the bottom surface of the lower body 32 is a powder particle. Even when the angle of repose is larger than the body repose angle, the powder particles can be stably deposited inside the discharge device 14, and the flushing of the powder particles with high flushing property can be prevented. Furthermore, even when a large amount of powder is supplied to the discharge device 14 where the powder is not stored, such as when the powder is initially charged from the silo 12 to the discharge device 14, the powder is controlled. By moving along the flow plate and being decelerated, it is possible to prevent the powder from flowing out from the discharge port, and it is possible to deposit the powder in the discharge device 14 efficiently.
Furthermore, since the distance between the bottom surface of the baffle plate 60 and the discharge port 50 can be made larger than before, the discharge flow rate can be kept high.

  Here, in the present embodiment, six flat plate-shaped flow restricting plates are arranged at equal intervals. However, the discharge device of the present invention is arranged at least on the bottom surface of the discharge device and from the line from the side surface of the main body toward the center. It has a predetermined angle of inclination, and the interval between adjacent flow control plates (the shortest distance between the tip on the discharge port side of the flow control plate and the adjacent flow control plate) may be equal to or less than the diameter of the discharge port. There is no limitation on the number of sheets, the arrangement angle, the height, and the length. Depending on the required performance, for example, as shown in FIGS. As shown in FIG. 4 (d), the baffle plates having different sizes may be arranged as shown in FIG. Note that the shapes of FIGS. 4A to 4C and FIG. 4E will be described later together with specific examples.

Further, the discharge device 14 of the present embodiment includes an opening / closing means 40 that relatively rotates the upper body 30 and the lower body 32 to separate the upper body 30 and the lower body 32.
The opening / closing means will be described in detail with reference to FIG. FIG. 5A is a schematic view showing a state in which the discharge device 14 is closed, and FIG. 5B is a schematic view showing a state in which the upper body 30 and the lower body 32 are separated and the discharge device 14 is opened. FIG.
The opening / closing means 40 includes an upper fulcrum part 70 provided on the flange of the upper body 30, a lower fulcrum part 72 provided at a position facing the upper fulcrum part 70 of the flange of the lower body 32, It has a shaft 74 that penetrates the fulcrum 72 and serves as a rotation shaft, and a tightening bolt 76 that seals the contact portion between the upper main body 30 and the lower main body 32.

The upper fulcrum portion 70 is provided in parallel to the lower opening of the upper main body 30 on the side opposite to the vibration means 36 of the flange of the upper main body 30, and the lower fulcrum portion 72 is connected to the vibration means 36 of the lower main body 32. Is provided on the opposite flange so as to face the upper fulcrum 70. Further, the upper fulcrum part 70 and the lower fulcrum part 72 are in contact with the joint surface between the upper main body 30 and the lower main body 32 on the same plane.
The shaft 74 is provided so as to penetrate the upper fulcrum portion 70 and the lower fulcrum portion 72 perpendicular to the contact surface between the upper main body 30 and the lower main body 32, and rotate the upper fulcrum portion 70 and the lower fulcrum portion 72 in the horizontal direction. Supports movable.

  Thereby, the lower fulcrum part 72 can be rotated with respect to the upper fulcrum part 70 about the shaft 74 as the rotation axis, and the lower main body 32 connected to the lower fulcrum part 72 can be rotated in the horizontal direction. it can.

From the above, by rotating the upper main body 30 and the lower main body 32 relatively with the shaft 74 as a fulcrum from the sealed state in which the upper main body 30 and the lower main body 32 are in contact with each other as shown in FIG. As shown in FIG. 5B, the lower opening of the upper body 30 and the upper opening of the lower body 32 can be exposed.
Thereby, the inside of the discharge device 14 such as the inner surface of the upper body 30, the inner surface of the lower body 32, and the barrier member 34 can be cleaned without removing the discharge device 14 from the granular material cutting device 10. Even if the type of the granular material to be changed is frequently changed, the inside of the discharge device 14 can be easily cleaned, and contamination can be prevented.

Next, the fastening bolt 76 of the opening / closing means 40 will be described with reference to FIGS.
A plurality of tightening bolts 76 are arranged on the flange of the lower main body 32 (three in this embodiment), press-contact the flange portions of the upper main body 30 and the lower main body 32, and a contact portion between the upper main body 30 and the lower main body 32. Keep sealed. At the time of discharging the granular material, the upper main body 30 and the lower main body 32 are sealed by the fastening bolts 76.
Here, the tightening bolt 76 has a detachable structure. During cleaning, the tightening between the upper main body 30 and the lower main body 32 is loosened, the upper main body 30 and the lower main body 32 are opened, and the upper main body 30 and The lower body 32 can be rotated.

  The seal member 42 is a packing material such as an O-ring, and is fitted into a groove formed in a flange on a contact surface of the lower body 32 with the upper body 30. Here, the seal member 42 is a packing material that is taller than the depth of the groove formed in the lower main body 32. By exposing the seal member 42 to a predetermined height (height) from the groove, the exposed portion is pressed and deformed when the upper body 30 and the lower body 32 are sealed. Thereby, the confidentiality of the contact part of the upper main body 30 and the lower main body 32 is ensured, and the leakage of the granular material from a contact part is prevented.

In the present embodiment, the lower main body is moved in the horizontal direction, but the present invention is not limited to this. For example, the upper main body and the lower main body are connected by a hinge or the like, and the lower main body is opened and closed by a hatch type. You may make it make it.
Here, in the present embodiment, it is preferable that the upper main body and the lower main body are separable from the viewpoint of easy cleaning, but the present invention is not limited to this, and the main body of an integrated structure that does not separate the upper and lower sides. A baffle plate can also be installed on the bottom.

  As described above, in the present invention, flushing can be prevented without reducing the discharge performance by providing the lower body with the baffle plate that guides the flow of the granular material and decelerates the flow velocity thereof. Furthermore, by making the upper main body and the lower main body separable, even when the shape of the inside of the apparatus becomes complicated by providing a baffle plate, the inside of the upper main body and the lower main body can be easily cleaned. .

  Hereinafter, the present invention will be described in more detail with reference to specific examples of the present invention.

  Using the discharge device 14 shown in FIGS. 2 and 3, the distance between the baffle plate and the bottom surface of the main body, the discharge port diameter, the size of the current control plate, the number of current control plates, the shape of the bottom surface of the lower main body, and the granular material The amount was changed, and the discharge amount when the slide was opened in the powder material having a high flushing property in each case and the discharge flow rate of the powder material having a low flushing property were confirmed.

[Example 1]
In this embodiment, 250 mm outside diameter _{D 1} of the bottom surface of the baffle plate 60 of the discharge device, 75 mm distance _{L 1} between the bottom and the outlet 50 of the baffle plate 60, the diameter _{D 2} of the discharge port 50 200 mm, the lower body Six current-control plates are arranged in 32, and the bottom shape of the lower main body 32 is a flat plate whose surface is not polished. Here, the height _{L 2} of the flow restriction plate 38 is 30 mm, as shown in FIG. 4 (a), at the outlet 50 near, distance _{d 1} between adjacent flow restriction plate, clogging system flow plate 38 It arrange | positioned so that the shortest distance of the front-end | tip on the discharge port side and the adjacent flow control board might be set to 50 mm. In addition, a slide (gate) (not shown) is provided in the opening at the bottom of the silo 12.
The discharge amount at the time of slide opening of a highly flushing granular material (hereinafter referred to as granular material 1) in the discharging device having the above-described configuration was measured as follows.
First, with a slide (gate) being closed, a certain amount of powder 1 was introduced from above the silo 12. Next, when the slide was fully opened, a certain amount of the granular material 1 flowed into the discharge device. At this time, the discharged granular material 1 was collected and its mass was measured.
Here, the amount of the granular material stored in the silo 12 before opening the slide was 140 kg.
As a result of the measurement as described above, the discharge amount of the granular material 1 when the slide was opened was 8.1 kg.

[Example 2]
Except that the size and arrangement position of the baffle plate arranged in the lower body 32 are changed, the discharged amount and the granular material when the slide of the granular material 1 is opened with the same configuration and shape as the discharging device of the first embodiment. The discharge flow rate of 2 was measured. Here, as shown in FIG. 4B, the flow restricting plate of the present embodiment has the same shape as the flow restricting plate shown in FIG. 4A and the longitudinal direction of the flow restricting plate. substantially flow restriction plate half to shape are arranged alternately, the shortest distance d ₂ is 115mm with long flow restriction plate adjacent to the distal end of the outlet side of the short flow restriction plate, long flow restriction to the length of the the shortest distance d ₃ between the short flow restriction plate adjacent to the distal end of the outlet side of the plate is disposed so that the 50 mm.
As a result, the discharged amount of the granular material 1 when the slide was opened was 24.7 kg.

Moreover, in the present Example, it measured by the method shown below about the discharge | emission flow volume of the granular material (henceforth the granular material 2) with low flushing property.
With the slide (gate) closed, 140 kg of the granular material 2 was introduced from above the silo 12. Next, the slide was fully opened, and a vibration motor as a vibration means was started. The granular material 2 discharged | emitted from the discharge port 50 was bag-packed one after another for 10 seconds. The mass of the granular material 2 in each bag was measured, and the discharge flow rate of the granular material 2 was calculated from the average value.
As a result of the measurement, the discharge flow rate of the granular material 2 was 8.4 ton / h.

[Example 3]
When the slide of the granular material 1 is opened with the same configuration and shape as those of the discharging device of the first embodiment except that the number of the baffle plates arranged in the lower body 32 is four and the shape of the baffle plate is further changed. And the discharge flow rate of the granular material 2 were measured. Here, in this embodiment, as shown in FIG. 4 (e), the four flow control plates are arranged such that the distance between the front end on the discharge port side of the flow control plate and the adjacent flow control plate is between all the current control plates. So that the distance is the same. Further, as shown in FIG. 4 (f), the shape of the baffle plate is such that the height L ₃ on the side surface of the lower body is 85 mm, the height L ₄ on the discharge port side is 30 mm, and the length L ₅ is 160 mm. A trapezoidal shape was adopted.
As a result, the discharge amount of the granular material 1 when the slide was opened was 15.1 kg, and the discharge flow rate of the granular material 2 was 7.5 ton / h.

[Example 4]
The same configuration as the discharge device of Example 1, except that the size and position of the baffle plate arranged in the lower body 32 are changed and the bottom shape of the lower body 32 is a flat mirror plate polished by buff # 400, The discharge amount when the slide of the granular material 1 was opened and the discharge flow rate of the granular material 2 were measured. Here, the flow restriction plate, as shown in FIG. 4 (c), distance d ₄ adjacent flow restriction plate in the vicinity of the discharge port is disposed so that the 80 mm.
Moreover, in the present Example, at the time of the measurement of the discharge amount at the time of slide opening of the granular material 1, the amount of the granular material stored in the silo was 120 kg. As a result of measurement under the above conditions, the discharge amount of the granular material 1 when the slide was opened was 16.3 kg, and the discharge flow rate of the granular material 2 was 7.3 ton / h.

[Comparative Example 1]
In this comparative example, without placing the flow restriction plate in the lower body 32, the distance L ₁ between the baffle plate and the outlet and 25 mm, except that the discharge diameter D ₂ was 150 mm, and the discharge device of Example 1 With the same configuration and shape, the discharge amount when the slide of the granular material 1 was opened and the discharge flow rate of the granular material 2 were measured. Here, in the present Example, the amount of the granular material stored in the silo was 120 kg at the time of measuring the discharge amount when the granular material 1 was slid open. As a result, the discharge amount of the granular material 1 when the slide was opened was 13.4 kg, and the discharge flow rate of the granular material 2 was hardly discharged during measurement and could not be measured.

[Comparative Example 2]
In this comparative example, without placing the flow restriction plate in the lower body 32, except that the discharge diameter D ₂ was 150 mm, the discharge device and the same configuration of the first embodiment, a shape, slide opening of the granular material 1 The amount of discharge at the time and the discharge flow rate of the granular material 2 were measured. Here, in the present Example, the amount of the granular material stored in the silo was 120 kg at the time of measuring the discharge amount when the granular material 1 was slid open. As a result, the discharge amount of the granular material 1 when the slide was opened was 56.5 kg, and the discharge flow rate of the granular material 2 was 7.8 ton / h.
Thus, in Comparative Example 2, flushing could not be prevented.

[Comparative Example 3]
In not place a flow restriction plate in the lower body 32, except that the distance L ₁ between the baffle plate outlet and 25 mm, and a flat end plate having a bottom shape of the lower body buff # 400 abrasive present comparative example, With the same configuration and shape as the discharging apparatus of Example 1, the amount of discharge when the slide of the granular material 1 and the discharge flow rate of the granular material 2 were measured. Here, in the present Example, the amount of the granular material stored in the silo was 120 kg at the time of measuring the discharge amount when the granular material 1 was slid open. As a result, the discharge amount of the granular material 1 when the slide was opened was almost the entire amount.
Thus, in the case of this comparative example 3, although the distance between a baffle plate and a discharge port was shortened, flushing could not be prevented.

  Table 1 below summarizes the distance between the baffle plate and the discharge port, the discharge port diameter, the number of flow control plates, the shape of the bottom surface, the amount of the granular material, and the measurement results.

  As shown in Table 1, according to the present invention in which a baffle plate is installed on the bottom surface of the lower main body, in the vibratory granular material discharging apparatus that discharges granular material, when the slide of the highly flushing granular material is opened. Can be reduced, and even if the granular material has a large angle of repose, a low flushing property and a low fluidity, a discharge flow rate of a certain level or more can be obtained. Thereby, even if it is a granular material with high flushing property, flushing can be reduced, and also even if it is a granular material with low flushing property, discharge | emission amount can be maintained high.

By the way, as described above, the conventional vibratory granular material discharge device needs to be provided with a discharge flow rate adjusting device such as a screw feeder in the subsequent stage in order to adjust the discharge flow rate, and the device configuration becomes complicated. There was a problem of cost.
Therefore, the present inventors have intensively studied a method for adjusting the discharge flow rate without using the discharge flow rate adjustment device, and as a result, have found that the discharge flow rate can be adjusted by controlling the excitation means of the discharge device.

Furthermore, it has been found that the discharge flow rate changes in proportion to the excitation frequency of the vibration means in the frequency region where the vibration frequency of the vibration means for vibrating the discharge device is equal to or higher than the resonance frequency of the discharge device.
Thereby, in the vibration type granular material discharge device of the present invention, it is possible to adjust to the desired discharge flow rate by adjusting the excitation frequency according to the stored powder particles and the desired discharge flow rate. .

Hereinafter, the adjustment method of the discharge amount of a granular material is demonstrated in detail with a specific Example.
Here, in this embodiment, the discharging device 14 described above is used as the vibrating powder particle discharging device, and the powder material 2 (a powder material having low flushing property) is used as the discharged powder material.
First, using the discharge device 14, the relationship between the excitation frequency and the discharge flow rate when the granular material 2 was discharged was measured as follows.
In the silo 12, 140 kg of the granular material 2 is stored, and the granular material 2 discharged from the discharge port 50 of the discharge device 14 is lifted onto the silo 12 by the conveyor. While the circulation path was thus formed, the slide was opened, the excitation frequency was first set to 30 Hz, and the vibration motor was started. When the discharge flow rate from the discharge device 14 is stabilized, the mass of the granular material discharged in a certain time is measured and converted into the discharge flow rate. Here, the vibration motor was set in two ways. That is, when the excitation weight is set to 80% of the maximum excitation force and 100%.
The measurement results are shown in FIG. Here, in FIG. 6, the vertical axis is the discharge flow rate [ton / h] of the discharge device 14, and the horizontal axis is the excitation frequency [Hz].
As shown in the graph of FIG. 6, in the frequency region of 30 Hz or more that is the resonance frequency of the discharge device 14, the relationship between the excitation frequency of the excitation unit 36 and the discharge flow rate is proportional.

  As mentioned above, in this embodiment, the granular material of a desired flow volume can be discharged | emitted by adjusting an excitation frequency in the frequency area | region of 30 Hz or more.

Furthermore, in the same manner as in the above embodiment, by measuring the relationship between the excitation frequency and the discharge flow rate for various powders in advance, the type of powder stored in the silo and the desired discharge performance Accordingly, the excitation frequency of the excitation means 36 can be adjusted.
Thus, in the present invention, the discharge flow rate can be adjusted by adjusting the excitation frequency of the vibration means 36 without using a discharge amount adjusting device such as a screw feeder.
Here, in such control, the control unit 80 described above stores the relationship between the excitation frequency and the discharge flow rate for each granular material, and the granular material stored in the silo 12 and the desired discharge flow rate are stored. Accordingly, by controlling the excitation frequency, the discharge flow rate can be adjusted regardless of the physical properties of the granular material.

  As described above, in the present invention, by providing the baffle plate on the bottom surface of the vibratory granular material discharging device, it is possible to prevent the granular material from being flushed without reducing the discharge flow rate, and further, the vibration means The discharge flow rate can be adjusted by controlling the excitation frequency. Thereby, devices, such as a screw feeder and a slide gate, become unnecessary, a device structure can be simplified and device cost can be reduced.

In addition, when changing the granular material to be stored, after the supply of the granular material from the silo 12 to the discharging device 14 is stopped, the vibration motor of the vibrating means 36 is rotated for a predetermined time until the granular material is not discharged. The upper main body 30 and the lower main body 32 are vibrated to perform the idling operation, and then the vibration motor is rotated in the direction opposite to that at the time of discharging the granular material.
As described above, after the powder supply is stopped, the powder particles remaining in the upper main body 30 and the lower main body 32 can be reduced by idling and reversely rotating the vibration motor. Contamination during body changes can be prevented. Moreover, the inside of the upper main body 30 and the lower main body 32 can be more easily performed by reducing the remaining granular material.

  In the present embodiment, the description has been given using the discharge device provided with the flow control plate. However, even in the discharge device not provided with the flow control plate on the bottom surface, the excitation frequency is adjusted at a frequency equal to or higher than the resonance frequency. Thus, the discharge flow rate can be adjusted as in the above embodiment.

  As mentioned above, although the vibration-type granular material discharging apparatus of this invention was demonstrated in detail, this invention is not limited to the said embodiment, Even if it is variously improved and changed in the range which does not deviate from the main point of this invention. Of course it is good.

It is a schematic diagram which shows schematic structure of a granular material cutting device provided with the vibration type granular material discharge | emission apparatus of this invention. It is a typical top view showing a schematic structure of a vibration type granular material discharging apparatus of the present invention. It is the II-II line arrow directional view of FIG. (A)-(e) is the schematic diagram which showed another example of the shape of a baffle plate, (f) is the schematic diagram which shows the shape of the baffle plate of (e). (A), (b) is explanatory drawing for demonstrating opening and closing of the vibratory granular material discharge apparatus main body by an opening-and-closing means. It is a graph which shows an example of the relationship between an excitation frequency and discharge flow volume. It is sectional drawing which shows schematic structure of the conventional vibration feeder.

Explanation of symbols

10 Granule Cutting Device 12 Silo 14 Vibrating Powder Discharge Device (Discharge Device)
DESCRIPTION OF SYMBOLS 16 Support body 20 Vibration isolator 22 Connection member 30 Upper main body 32 Lower main body 34 Barrier member 36 Excitation means 38 Current control plate 40 Opening and closing means 42 Seal member 50 Outlet port 56 Receptacle plate 60 Baffle plate 62 Stay 70 Upper fulcrum part 72 Lower Support point 74 Shaft 76 Tightening bolt 80 Control part

Claims (8)

A vibratory granular material discharging device that is disposed below the storage tank device for storing the granular material, and discharges the granular material stored in the storage device,
A main body having an outlet on the bottom;
A barrier member that is disposed on the storage device side of the discharge port inside the main body, is convex toward the storage device side, and has an outer diameter larger than the opening diameter of the discharge port;
Vibration means for applying a predetermined vibration to the main body;
A control unit for controlling the excitation means,
Vibrating granular material discharge characterized by comprising at least one flow restricting means arranged around the discharge port on the bottom surface of the main body, guiding the flow direction of the granular material, and decelerating the flow of the granular material. apparatus.   The vibratory granular material discharging apparatus according to claim 1, wherein the flow restricting means is disposed on a tangent line of the discharge port.   The vibratory granular material discharging apparatus according to claim 1, wherein the main body has a structure separable into an upper part and a lower part.   Further, a fulcrum portion serving as a rotation axis is provided at a predetermined portion of the outer wall of the upper portion and the lower portion, and the upper portion and the lower portion are parallel to the contact surface between the upper portion and the lower portion with the fulcrum portion as a rotation axis. The vibratory granular material discharging apparatus according to claim 3, wherein the upper part and the lower part can be separated by relatively rotating in any direction.   The vibratory granular material discharging apparatus according to any one of claims 1 to 4, wherein the control unit adjusts a vibration frequency of the vibration means to control a discharge amount.   The control unit vibrates the main body in the same direction as the direction of vibration when discharging the granular material for a predetermined time after the supply of the granular material is stopped from the opening of the storage device, and then vibrates when discharging the granular material. The vibratory granular material discharging apparatus according to any one of claims 1 to 5, wherein the vibrating means is controlled to vibrate the main body in a direction opposite to a direction in which the main body is rotated. A vibratory granular material discharging device that is disposed below the storage tank device for storing the granular material, and discharges the granular material stored in the storage device,
A main body having an outlet on the bottom;
A barrier member that is disposed on the storage device side of the discharge port inside the main body, is convex toward the storage device side, and has an outer diameter larger than the outer diameter of the discharge port;
Vibration means for applying vibration of a predetermined frequency to the main body;
A control unit for controlling the excitation means,
The main body has a structure that can be separated into an upper part and a lower part. A vibratory granular material discharging device that is disposed below the storage tank device for storing the granular material, and discharges the granular material stored in the storage device,
A main body having an outlet on the bottom;
A barrier member that is disposed on the storage device side of the discharge port inside the main body, is convex toward the storage device side, and has an outer diameter larger than the outer diameter of the discharge port;
Vibration means for applying vibration of a predetermined frequency to the main body;
A control unit for controlling the excitation means,
The said control part adjusts the vibration frequency of the said vibration means, and controls the discharge amount, The vibration type granular material discharge apparatus characterized by the above-mentioned.

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