JP2005263229A - Hopper for storing grain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hopper for storing grains which prevents clogging and hanging of grains that are soft as plastic bars and tend to entangle each other to aggregate by carrying out a simple modification of necessary equipment. <P>SOLUTION: A movable baffle plate 24, whose tilt angle can be changed, is mounted on the inner wall of an orifice 12 on the lower part of the hopper. Fixed baffle plates 21, 22, 23 are provided on a straight part 11 on the upper part of the hopper. The movable baffle plate 24 receives the plastic bars cast into the hopper, reducing compressive load applied to the plastic bars near the discharge port of the hopper to prevent the clogging and hanging of the plastic bars resulting from the compressive deformation of the plastic bars. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hopper for storing granules, and more particularly to a hopper for storing granules that can easily prevent clogging of particles in the hopper and the occurrence of shelf hanging.

  Conventionally, in a steelmaking process in a converter, iron ore, quick lime, and the like are input as auxiliary materials for ironmaking and cooling. FIG. 2 is an explanatory diagram of equipment for charging auxiliary materials into the converter. A hopper 4 is provided above the converter 1, and the auxiliary material stored in the auxiliary material storage hopper 4 is cut out by a magnetic feeder or the like, weighed by the weighing machine 3, and then added to the auxiliary material. It is introduced into the converter 1 via the chute 2.

  On the other hand, in recent years, from the standpoint of protecting the global environment and effective use of resources, cylindrical solids (referred to as "plaver"), which are a mixture of waste plastic and converter exhaust gas dust, are used as auxiliary materials for converters. It has been introduced. Incidentally, the plastic bar is a cylindrical particle having a diameter of about 30 mm and a length of 25 to 100 mm mixed in a ratio of plastic ≧ 70% and converter exhaust gas dust ≦ 30%.

  However, the plastic material has a low specific gravity, is soft, and the surface of the existing secondary material storage is designed on the assumption that ore etc. is used because the waste plastic foreign matter protrudes irregularly and has unevenness on the surface. When used for a hopper, it is compressed and integrated especially at the throttle portion near the discharge port, and clogging and shelf hanging tend to occur. Therefore, the stable use of the auxiliary material storage hopper is hindered.

On the other hand, as a conventional method of preventing clogging of the hopper's internal particles and shelf hanging, the hopper itself that changes the inclination angle of the hopper, the material used, the size of the discharge port, etc. according to the properties of the particles And a method using an auxiliary device such as a vibration generating device such as a knocker or vibrator, a fluidizing device such as aeration, or a stirring device such as a scraper (for example, Patent Document 1 or Patent Document 2). reference.).
JP-A-8-048389 Japanese Patent Laid-Open No. 9-295716

  In order to prevent the occurrence of clogging and shelf hanging of the auxiliary material storage hopper when using a plastic bar, there are the following problems when trying to apply the above conventional generation prevention method.

  First, a method of changing the structure of the hopper itself, such as changing the inclination angle of the hopper, is a large-scale modification and costs high.

  As for a method of installing an accessory device such as a knocker or aeration, the knocker has a risk of having an adverse effect when a soft granule such as a plastic bar is compressed and clogging occurs. Aeration is effective for powder particles, but is ineffective for particles that tend to get tangled together like a plastic.

  The present invention has been made in view of the above circumstances, and is a facility that is easy to prevent clogging and shelves from occurring even for granular materials that are soft and tend to be tangled with each other. It is an object of the present invention to provide a granule storage hopper that can be appropriately performed by remodeling.

  In order to solve the above problems, the present invention has the following features.

  [1] In a granule storage hopper having a constricted portion whose cross-sectional area gradually decreases downward and has a lower end serving as a discharge port, the upper surface is attached to the inner wall of the constricted portion, and the upper surface is the inner wall of the constricted portion A granule storage hopper comprising a baffle plate having a shape inclined obliquely downward.

  [2] The granule storage hopper according to [1], wherein the baffle plate can change an inclination angle of an upper surface.

  [3] The granule storage hopper according to [1] or [2], wherein another baffle plate is provided inside the hopper above the baffle plate.

  In the present invention, a baffle plate having an inclined upper surface is attached to the inner wall of the throttle part of the granule storage hopper. The compressive load applied to the granule accumulated at the upper part of the outlet is alleviated, and even in the case of a soft and easily entangled granule such as a plastic bar, it is possible to prevent clogging and shelf hanging due to compressive deformation.

  In addition, since a baffle plate is simply attached to the inner wall of the throttle part, there is no need for large-scale equipment modification, and the equipment cost is low.

  An embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a granule storage hopper according to an embodiment of the present invention. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. 1 (c) is a side view. is there.

  In FIG. 1, reference numeral 10 denotes a granule storage hopper according to this embodiment. The granule storage hopper 10 has a rectangular horizontal cross section. Like a normal storage hopper, the upper portion of the hopper is a straight portion 11 having a constant cross-sectional area downward, and the lower portion of the hopper is The throttle portion 12 has a sectional area that gradually decreases downward. The lower end of the throttle unit 12 is a discharge port 13, and an electromagnetic feeder 14 is installed in the discharge port 13.

  In the granule storage hopper 10 according to this embodiment, a movable baffle plate 24 is provided in the throttle portion 24, and a fixed baffle plate 21, a baffle plate 22, and a baffle plate 23 are provided in the straight portion 11. .

  The movable baffle plate 24 is a plate material having one end in the width direction attached to the inner wall of the throttle portion 24, and the upper surface is inclined obliquely downward from the inner wall of the throttle portion 24. As shown in FIG. 1C, the inclination angle can be arbitrarily changed. The change range is such that the horizontal projection surface of the movable baffle plate 24 completely covers the discharge port 13. The position can be changed in a range from the position where the inner wall of the throttle unit 24 has the same inclination angle.

  The fixed baffle plate 21 is attached so that both ends in the longitudinal direction are respectively fixed to the inner wall of the straight portion 11 and the central portion of the straight portion 11 is crossed in the horizontal direction. And as shown in FIG.1 (b), the cross-sectional area is an isosceles triangle, and it arrange | positions so that the vertex may be located upwards.

  The fixed baffle plate 22 and the fixed baffle plate 23 are provided so as to face each other. The side surfaces are fixed to the inner wall of the straight portion 11 directly above the throttle portion 24 and are attached so as to extend in the horizontal direction. ing. As shown in FIG. 1B, the cross-sectional area is a right triangle, and the upper surface is inclined obliquely downward from the inner wall of the straight portion 11.

  The fixed baffle plates 21 to 23 are disposed so as to extend in the same horizontal direction, and the movable baffle plate 24 is disposed so as to extend in a horizontal direction orthogonal to the fixed baffle plates 21 to 23.

  And when a plastic bar is thrown into the granular material storage hopper 10 configured as described above, a part of the plastic bar into which the movable baffle plate 24 attached to the inner wall of the throttle portion 12 is thrown. The plastic bar moves downward along the inclination of the upper surface. As a result, the compressive load applied to the plastic bar accumulated at the upper part of the discharge port 13 is alleviated, and even in the case of a soft and easily entangled granular material such as a plastic bar, it is possible to prevent clogging and shelf hanging due to compressive deformation. it can.

  In addition, when a plastic bar having a different property is charged or when a granular material other than a plastic bar is charged, the tilt angle of the movable baffle plate 24 can be changed to set a suitable tilt angle. . Further, in the case of a granule that does not have any problem even if there is no movable baffle plate 24, it is troublesome to remove the movable baffle plate 24 by matching the inclination angle of the movable baffle plate 24 with the inclination angle of the inner wall of the throttle portion 24. Can be omitted.

  In addition, the fixed baffle plates 21, 22, and 23 provided on the straight portion 11 receive the plastic bar thrown into the straight portion 11 so that the plastic bar moves downward along the inclination of the upper surface thereof. As a result, it is possible to prevent the plastic bar from dropping directly onto the throttle portion 12 as much as possible. As a result, the impact caused by the dropped plastic bar dropping directly onto the throttle portion 12 is alleviated and the compressive force applied to the plastic bar is reduced. it can.

  Thus, in the granule storage hopper 10 according to this embodiment, since the baffle plates 21 to 24 of an appropriate shape are attached to the inner wall of the granule storage hopper, By reducing the compressive load applied to the plastic bar in the vicinity of the discharge port 13, it is possible to prevent clogging and shelf hanging due to compressive deformation even in the case of a soft and entangled granular material such as a plastic bar. Thereby, the stable continuous use of the granule storage hopper 10 is attained.

  Moreover, since only the baffle plates 21 to 24 are attached to the inner wall of the hopper, there is no need to make a large-scale facility modification, and the facility cost can be reduced.

It is explanatory drawing of one Embodiment of this invention. It is explanatory drawing of the auxiliary material injection | throwing-in equipment to a converter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Converter 2 Secondary raw material input chute 3 Weighing machine 4 Secondary raw material storage hopper 10 Granule storage hopper 11 Straight part 12 Throttle part 13 Discharge port 14 Electromagnetic feeder 21, 22, 23 Fixed baffle plate 24 Movable baffle plate

Claims (3)

  A granule storage hopper having a constricted portion whose cross-sectional area gradually decreases downward and has a lower end serving as a discharge port, and is attached to the inner wall of the constricted portion, and the upper surface is obliquely below the inner wall of the constricted portion A granule storage hopper comprising a baffle plate having an inclined shape.   The granule storage hopper according to claim 1, wherein the baffle plate can change an inclination angle of an upper surface.   3. The granule storage hopper according to claim 1, further comprising another baffle plate inside the hopper above the baffle plate.

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