JP4953638B2 - Cement hopper - Google Patents

Description

  The present invention relates to a cement hopper for a batcher plant. More specifically, the present invention is equipped with a batcher plant that inputs cement in a bag, measures the weight, and stirs and kneads cement and water to produce cement milk. It relates to a cement hopper.

  Since the concrete plant generally used is a batch type, this batch type concrete plant is called a batcher plant. The batch method separates the weighing, mixing, and discharging of cement and aggregates each time, and has the advantage of being able to switch the blending according to the type of concrete and accurately manage the kneading time and kneading capacity. .

  In the following embodiments, a batcher plant for producing cement milk will be described as an example. Needless to say, the cement hopper of the present invention is not limited to this type of batcher plant.

  The cement hopper of the present invention is provided on the upper part of a cement silo in a batcher plant, and is used for charging bagged cement. The input cement bag is torn with a cutter blade placed in the cement silo to transfer the concrete from the bag, and the weight is measured by the weight meter of the batcher plant. The cement transferred to the cement silo is weighed to a predetermined weight by a weight measuring device, and water is added, stirred and kneaded in a batcher plant to produce cement milk. Cement milk is used, for example, in the pre-boring method, and after excavating the ground to a predetermined depth with an auger in advance, the cement milk for root consolidation is poured into the drilled hole, and after the pile is set A support force is developed with hardening.

The conventional cement hopper of this type is a square frustum box having a narrow lower part and an open upper part, and the upper part remains open.
JP-A-11-107251

  However, in this type of conventional cement hopper, the upper part remains open, so when the bagged cement is put into the silo and the bag is broken, the powdered cement rises as dust, and this cement Dust drifted near the work area, and the work had to be suspended until the cement dust scatters. Furthermore, it is difficult not only to interrupt work, but it is difficult to completely prevent inhalation of the scattered cement dust into the respiratory tract even if the worker wears a protective mask. There was an environmental problem.

  An object of the present invention is to provide a cement hopper that can prevent the dust from rising in the atmosphere of the work place as much as possible when the cement hopper is charged with cement and transferred. To do.

In order to achieve the above object, a cement hopper according to the present invention has a first lid body serving as an inner lid and a second lid body covering the first lid body at an upper opening edge portion by a hinge portion. A cement hopper that is freely openable and closable, wherein the first lid comprising a plurality of lids that rotate about a hinge is configured to open upward, and the tip of the lid It is configured to have a working hole large enough to take out the cement bag when the lid is closed, and the first lid is opened and closed at the tip of the lid. A handle is attached .

With the above configuration, when the powder is put into the cement hopper, the dust scattered in the cement silo can be prevented from diffusing by the lid.
Further, according to the present invention , a stop plate is provided at an end of the lid portion, and the stop plate abuts against the inner wall of the cement hopper. When the first lid body is closed, the stop plate is directed toward the center of the cement hopper. It has a structure that inclines so as to gently rise.

Further, the present invention provides a dust collector having a duct tip connected to the opening edge of the cement hopper at a position that does not obstruct the opening and closing of the first and second lids and communicating with the inside of the cement hopper via the duct. It is characterized by having been installed. The dust scattered in the silo body with the lid closed with this dust collector is sucked and filtered.

  According to the present invention, by closing the lid, it is possible to prevent the dust scattered in the cement hopper from diffusing into the atmosphere, improving the working environment and improving the worker's occupational health. Can do.

(Embodiment 1)
Hereinafter, a first embodiment of a cement hopper according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a cement silo provided with a cement hopper of the present invention, FIG. 2 is a plan view in which a part of a lid is broken, and FIG. 3 is a partially enlarged view in a state where an upper lid is opened. The cement hopper 2 of the cement silo 1 is made of an iron plate, and has a truncated pyramid shape in which the upper part is a rectangular parallelepiped or a cubic box and the lower part is narrow. The cement hopper of the present invention may be integrated with the cement site 1 of the batcher plant, or may be configured so that the cement hopper 2 can be united and incorporated later or removed as a separate unit. .

  A first lid 3 and a second lid 4 as shown in FIGS. 2 and 3 are attached to the upper portion of the cement hopper 2. In the present embodiment, the first lid 3 serves as an inner lid of the cement hopper 2. In the plan view of FIG. 2, the first lid 3 is composed of four trapezoidal lid portions 3 </ b> A, and the lower bottom of the trapezoid is the cement hopper. Two opening edges 5 are attached by hinges 6 so as to be freely opened and closed.

  The first lid 3 composed of four lid portions 3A is provided with a triangular stopper plate 3B at the end of the lid portion 3A, so that the stopper plate 3A comes into contact with the inner periphery of the cement hopper 2. When the first lid 3 is closed, as shown by the solid line in FIG. 3, the first lid 3 is inclined so as to gradually rise toward the center of the cement hopper 2. When the lid is opened, as shown by an imaginary line F1 in FIG. 3, the first lid 3 is configured to rotate upward about the hinge portion 6 so as to open upward.

  When the first lid 3 is closed, the state inside the cement hopper 2 can be observed at the center as shown in FIG. 2, and a square work hole for taking out a used cement bag is obtained. 7 is configured. That is, the internal state can be observed from the working hole 7, and the cement bag thrown into the cement hopper 2 and torn and caught on the cutter blade 8 described later can be taken out with the first lid 3 closed. . In this embodiment, the tip of the lid 3A constituting the first lid 3 is partially cut out to form a trapezoidal shape, and when the lid is closed, a square working hole 7 is formed at the center. ing. The working hole 7 has such a size that the cement bag can be taken out, and it is necessary to set the size so that the cement dust scattered in the cement hopper 2 does not go out to the outside, but the shape is not limited to such a shape. .

A handle 9 is attached to the tip of the four lid portions 3A of the first lid 3 so that an operator can manually open the first lid 3 when the first lid 3 is opened and closed.
In order to cover the entire first lid 3, the second lid 4 is attached to the opening edge 5 of the cement hopper 2 by a hinge 10 so as to be freely opened and closed. The second lid 4 has a size that covers the entire first lid 3 as indicated by a virtual line F2 in FIG. The role of the second lid 4 is that the first lid 3 has a work hole 7 so that rainwater, foreign matter and the like do not enter from the work hole 7. The configuration of the second lid 4 is slightly larger than that of the first lid 3, and the outer shape is a truncated pyramid shape such that the central portion is higher.

  A cutter blade 8 is provided in the cement hopper 2. This cutter blade 8 has a cross shape in the plan view of FIG. 4, and in the front view of FIGS. 1 and 3, a plate having a triangular shape with a sharp apex 8A is combined into two crosses. The apex 8A at the center of the cutter blade 8 is arranged so as to be located at the center of the work hole 7 of the first lid 3. In addition, about the structure of this cutter blade 8, it is not limited to what is illustrated in particular.

  A lower portion of the cement hopper 2 has a bottom opening 11, and a screw conveyor 12 is provided so as to communicate with the bottom opening 11. That is, the screw conveyor 11 is horizontally attached to the lower part of the cement hopper 2 in the left-right direction of FIG. The cement collected at the lower portion of the cement hopper 2 is conveyed by the screw conveyor 12 from one end side (left side in FIG. 1) to the other end side (right side in FIG. 1). A connecting pipe 13 for sending cement to the batcher plant side is connected to the lower end of the other end of the screw conveyor 12. The screw conveyor 12 is driven by a motor 14 provided in the lower part of the cement hopper 2.

  A dust collector 16 is installed on the structural frame 15. This dust collector 16 sucks the cement dust rising inside the cement hopper 2 and filters it with a bag filter (not shown). The first and second of the opening edge 5 of the cement hopper 2 The end of the duct 17 is connected to a position that does not interfere with the opening and closing of the lids 3 and 4.

  A work table 18 is installed at the upper end of the outer periphery of the cement hopper 2. The work table 18 is used by an operator to open and close the first lid 3 and the second lid 4 when opening and closing the lid. When the lids 3 and 4 are heavy, they are opened and closed using a crane or a pulley. Furthermore, a ladder 19 is attached to the structural frame 15 of the cement silo 1 so that an operator can climb the work table 18.

Next, the use state of the above embodiment will be described.
FIG. 5 is a front view of the cement silo 1 installed in the batcher plant 20. The operation starts by opening the first lid 3 and the second lid 4. That is, as shown in FIG. 3, the second lid body 4 is rotated around the hinge portion 10 to bring the second lid body 4 into an open state. As described above, when the cement silo 1 is large and difficult to be opened manually by the operator, the second lid 4 is opened using a crane or a pulley.

  Next, the first lid 3 is opened. Since the first lid 3 is divided into four parts, when the weight of one lid 3A is not so heavy, the worker climbs the work table 18 and opens the lid by the worker himself. When the first lid 3 is heavy in a large silo, a crane or a pulley is naturally used. With the first lid 3 opened, the dust collector 16 is operated to start sucking air in the cement hopper 2.

  With the first lid 3 and the second lid 4 opened, the operator inserts a cement bag through the upper opening of the cement hopper 2 and breaks the bag at the sharply pointed vertex 8A of the cutter blade 8. Drain the cement from the cement bag. In that case, since the dust of the cement rises, the first lid 3 is closed and the apparatus waits until the dust that has risen no longer scatters. Since dust scattered in the cement hopper 2 is sucked by the dust collector 16, the scattering is settled without taking much time. The used cement bag which is torn and used at the stage where the dust scattering is settled is extracted from the work hole 7 of the first lid 3.

  Further, the operation of putting the cement bag into the cement silo 1 is repeated until the amount of cement reaches a predetermined weight. It is not necessary to open all the four lid portions 3A of the first lid 3 during the loading operation of the cement bag, and one or two may be opened and the cement bag may be loaded.

  The weight of the cement stored in the cement silo 1 as described above is measured by the measuring instrument of the batcher plant 20. The cement that has reached a predetermined weight is conveyed to the batcher plant 20 side by the screw conveyor 12, and a predetermined amount of water is added, stirred and kneaded to produce cement milk. As described above, this cement milk is used in the pre-boring method.

  When the work is finished, after cleaning, the first lid 3 and the second lid 4 are closed. The second lid 4 can prevent rainwater or foreign matter from entering the work hole 7 of the first lid 3.

  In the cement silo 1 of the above-described embodiment, the case where the cement silo is used in the batcher plant 20 for stirring and kneading cement and water has been described, but the present invention is not limited to such a batcher plant 20, You may use for the batcher plant which knead | mixes aggregates, such as sand and crushed stone, and it is not limited to the plant of a special use.

  In the above embodiment, the cement hopper 2 has a cubic or rectangular parallelepiped shape. However, the cement hopper 2 may have a cylindrical shape at the top and a truncated cone shape at the bottom. It may be divided into three or four so that a circular working hole is formed at the center. Of course, the cement hopper 2 may be a polygonal box such as a pentagon, hexagon, or octagon.

Furthermore, in the above embodiment, the first lid 3 is provided with a square work hole 7 in the center using a trapezoidal lid, but only the shape of the work hole 7 may be circular. Good.
(Embodiment 2)
The second embodiment of the cement hopper of the present invention will be described below.
FIG. 6 is a front view of a fully automatic small-sized mixing plant equipped with the cement hopper of the present invention, and FIG. 7 is a side view of the plant. The same members as those in the first embodiment are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

  In the second embodiment, the cement hopper 2 of the present invention is provided in a fully automatic small-sized mixing plant capable of producing high-quality cement milk by fully automatic operation only by setting the blending ratio or each weight of the material. Is.

  In this fully automatic small-sized mixing plant, the cement hopper 2 is attached to the upper left part of the structural frame in FIG. Similar to the cement hopper 2 of the first embodiment, the cement hopper 2 of the second embodiment is also provided with a first lid 3 and a second lid 4. The first lid 3 is constituted by four trapezoidal lids 3A as in the first embodiment, and a work hole 7 is opened at the center.

  The second lid 4 completely covers the first lid 3 and prevents rainwater or the like from entering the cement hopper 2 from the work hole 7. The second lid 4 is attached to the upper outer peripheral edge of the cement hopper 2 by a hinge so as to be freely opened and closed. The second lid 4 may be omitted when it is installed in an environment that does not rain.

  A screw conveyor 21 is provided obliquely in communication with the lower end of the cement hopper 2. Further, a measuring mixer 22 is disposed below the discharge port 21 </ b> A of the screw conveyor 21, and an agitator 23 is provided adjacent to the measuring mixer 22. The cement loaded into the cement hopper 2 by the screw conveyor 21 is conveyed to the weighing mixer 22 and weighed. The cement carried into the measuring mixer 22 is weighed, and predetermined water is added and kneaded. The cement kneaded with water is stirred and stored in the agitator 23 by a stirring blade.

  The cement hopper 2 of the present invention is compatible with the above-described fully automatic small-sized mixing plant and has high versatility. In addition, the cement hopper 2 may be configured to be attached and detached as a unit, or may be integrated.

  The cement hopper of the present invention can be used at a work site where cement dust scatters and can suppress dust scatter.

It is a front view of the cement hopper of Embodiment 1 of the present invention. It is a top view of the cement hopper of Embodiment 1 of the present invention. It is the elements on larger scale of the cement hopper of Embodiment 1 of this invention. It is a plane schematic diagram of the cement hopper of Embodiment 1 of the present invention. It is a use condition figure of the cement hopper of Embodiment 1 of the present invention. It is a front view of the cement hopper of Embodiment 2 of the present invention. It is a side view of the cement hopper of Embodiment 2 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cement silo 2 Cement hopper 3 1st cover body 3A Cover part 4 2nd cover body 5 Opening edge part 7 Working hole 8 Cutter blade 12 Conveyor apparatus (screw conveyor)
16 Dust collector 18 Work table

Claims (3)

A cement hopper in which a first lid that serves as an inner lid and a second lid that covers the first lid are attached to the upper opening edge by a hinge portion so as to be freely opened and closed ,
The first lid body including a plurality of lid portions rotating around a hinge portion is configured to open upward.
A part of the front end of the lid part is cut away, and a work hole having a size capable of taking out the cement bag when the lid body is closed is formed.
A handle for opening and closing the first lid is attached to the tip of the lid.
Cement hopper characterized by that. A stop plate is provided at an end of the lid portion, and when the stop plate is in contact with the inner wall of the cement hopper and the first lid body is in a closed state, the slope gradually rises toward the center of the cement hopper. The cement hopper according to claim 1, wherein the cement hopper is inclined so as to become . The duct tip is connected to the opening edge of the cement hopper at a position that does not interfere with the opening and closing of the first and second lids, and a dust collector that communicates with the inside of the cement hopper is installed through the duct. The cement hopper according to claim 1.

Images