JP6361469B2 - Vibrating sieve - Google Patents

Description

  The present invention relates to a vibrating sieve machine for sorting crushed stones in a crushed stone factory or for selecting materials used in a chemical factory.

There is a crushed sand production facility that produces crushed sand in a crushed stone factory.
FIG. 6 is an explanatory diagram of a conventional crushed sand production facility. In the crushed sand production facility 1, first, the raw material of the raw material hopper 2 is cut out by the vibration feeder 3 and crushed by a rotating crusher 4 for producing crushed sand. As an example, the crushed powder is sieved by a vibrating sieve machine 5 having a two-stage laminated structure in which a screen of 5 mm is arranged on the upper stage and a screen of 2.5 mm is arranged on the lower stage. The product on the sieve is returned to the return line 6 and re-ground by the rotary crusher 4. And only the lower sieving product was taken out as a product to produce crushed sand having a particle size distribution of 2.5 mm or less. The particle size distribution curve of the crushed material in the crushed sand production facility 1 produced in this way is produced so as to fall within the upper limit value and lower limit value particle size distribution lines of JIS crushed sand.

  When producing crushed sand, the particle size distribution of the crushed sand as a product is almost determined by the details of the mesh under the vibrating screen. However, the maximum particle size of the upper limit of JIS crushed sand extends to a range of 10 mm, and the JIS crushed sand standard is allowed up to 10 mm. For this reason, depending on the sand crusher having a crushed sand plant, when 2.5% or less of crushed sand of 2.5 mm to 5 mm is mixed with crushed sand of 2.5 mm or less, or 2.5 mm or less of crushed sand of 2.5 mm or less If you want to obtain crushed sand that is divided into several parts in the range of ~ 5mm in any proportion (for example, 2.5% to 3.5mm, 3.5mm to 5mm, respectively) In the method of obtaining the desired mixing ratio in the crushed sand plant, it was necessary to add another mixing line.

  In order to solve such a problem, the crushed sand manufacturing apparatus disclosed in Patent Document 1 includes an opening in the middle of the product passage of the vibrating screen, a slide gate capable of moving forward and backward horizontally in the width direction of the product passage, and an advance / retreat driving means. It is arranged. Thereby, since the product on a sieve is divided into arbitrary ratios and one is transferred to the return line and the other is transferred to the product line, it is possible to easily cope with a change in the particle size configuration.

  Similarly, the adjustment device disclosed in Patent Document 2 includes an opening in a conveyance chute that conveys an aggregate having a predetermined particle diameter, and an opening area control unit that extracts the aggregate by dropping a predetermined amount from the opening. Yes. The opening area control unit controls the amount of fall of the aggregate by sliding the control plate in the direction crossing the conveyance direction, thereby producing aggregate with a predetermined particle size. And adjust its production.

Japanese Patent Laid-Open No. 10-85622 Japanese Utility Model Publication No. 4-37575

  However, in the slide gate system disclosed in Patent Documents 1 and 2, the distribution structure is complicated, particles are attached to the slide gate, sand is caught in the gap of the slide part, and it cannot be operated during operation. There was a possibility of causing a defect. The operation of interrupting the operation and entering the inside of the vibrating screen for cleaning is dangerous.

In particular, the rotating damper of the cited document 2 has a possibility that a product on the screen passes through the shaft center, so that particles enter and become clogged and cause a rotation failure.
Also, normally, since the operation of dropping the sieved product with a large particle size from the opening and bypassing it is not performed, there is a possibility that particles containing moisture stick to the slide gate and do not operate when attempting bypass operation. there were.

Generally, in order to stretch the screen without loosening, the screen is fixed in a state in which the screen is stretched without loosening with a beam at the center of the screen and tension metal fittings on both sides. Since it is difficult to stretch without loosening with only the tension metal fittings on the left and right sides of the sieve, the center part of the sieve mesh is higher than both sides. In addition, there is a vibrating sieve that stretches the sieve screen horizontally, but it is difficult to install the vibrating sieve horizontally to the left and right, and at present, a left and right inclination is generated. Furthermore, since the sieve screen of the vibration sieve machine is installed on the spring, the left and right inclination is also caused by the elastic difference of the spring.
Therefore, the products on the sieve mesh gather on both sides in the width direction or on either side and move on the mesh. For example, the size of 5 mm or less and 2.5 mm of the product crushed by the crusher is 20%, and the size of 2.5 mm or less is about 40%, and most of the product passes through 2.5 mm and there is little product remaining on the sieve screen. . The large particle size product on the sieve mesh flows on both sides and there is little in the center. The conventional sliding gate type double-opening type mixes the product only in the center, and the single-opening type mixes products with large particle sizes at both ends, so the size of the product on the sieve screen is biased .

  In view of the above-mentioned problems of the prior art, the present invention provides a product obtained by simply and easily obtaining a product obtained by adding crushed sand containing particles of a specified size or more to a crushed sand of a specified size or less at an arbitrary ratio. It is an object of the present invention to provide a vibrating sieve that can arbitrarily change the particle size distribution without any defects.

  The present invention provides, as a first means for solving the above-described problems, an opening that is larger than the mesh in the width direction of the sieve mesh and allows the product on the sieve to fall downward, and a main part of the sieve mesh. A shaft having a predetermined height from the surface and having an axial center disposed along the width direction of the sieve screen, a first plate extending in a radial direction from the axial center of the shaft, and a main surface of the first plate A vibration comprising: a second plate having a main surface in a direction, wherein the second plate includes a damper capable of closing the opening by rotating around the shaft of the shaft. It is to provide a sieving machine.

  The present invention provides, as a second means for solving the above-described problems, in the first means, wherein the damper is provided with a through hole in the first plate, and the opening is closed by the second plate. An object of the present invention is to provide a vibrating sieve machine in which the main surface of the first plate is arranged in a direction perpendicular to the flow direction of the product on the sieve screen.

  As a third means for solving the above-mentioned problems, the present invention is characterized in that, in the first or second means, the opening portion is provided with a protection portion at a position where the opening portion contacts the opening / closing damper. It is to provide a vibrating sieve machine.

  The present invention provides, as a fourth means for solving the above-mentioned problems, a vibration sieve machine characterized in that, in the third means, the damper and the protective part are made of an elastic material. It is in.

  According to the present invention as described above, when an opening is provided in the downstream portion of the sieve screen and the oversized particles are mixed, it can be bypassed easily. Moreover, since the opening provided in the sieve mesh can be opened and closed in a short time regardless of the width direction of the sieve, the product size on the sieve mesh can be recovered and mixed without unevenness. Furthermore, since the shaft is mounted on the main surface of the sieve screen at a position where it does not come into contact with the product on the sieve, it does not come into contact with the particles of the product on the sieve at all, and there is no possibility of causing a rotation failure.

According to the present invention as described above, the sieved product can be carried out in the flow direction from the through hole of the first plate while the opening is closed by the second plate.
According to the present invention as described above, it is possible to reduce wear or deformation of the contact portion between the collecting means and the sieve mesh due to vibration.
According to the present invention as described above, it is possible to reduce wear and deformation due to vibration of the collection means coming into contact with the sieve mesh or the collection means coming into contact with the product on the sieve.

It is a perspective view which shows the structure outline of the collection | recovery means of this invention. It is a top view of the collection | recovery means of this invention. It is a front view of the collection | recovery means of this invention. It is explanatory drawing of the damper of a modification. It is explanatory drawing of a vibration sieve. It is explanatory drawing of the conventional crushed sand production equipment.

  Embodiments of a vibrating sieve according to the present invention will be described below in detail with reference to the accompanying drawings.

[Vibrating sieve]
The vibration sieve 10 is used for the purpose of selecting the particle size of various granular materials in a civil engineering and building material factory and a chemical factory. FIG. 5 is an explanatory diagram of a vibrating sieve. The structure of the vibrating screen 10 is such that the vibrating screen 20 vibrates a screen (screen) 30 having a large number of holes made of a wire mesh, a metal plate, resin, or rubber. The vibration sieving machine 10 performs sieving of powder on the sieve mesh 30 by repeatedly vibrating the sieve mesh 30 in the same plane that combines the vertical direction (vertical direction) and the horizontal direction (horizontal direction). ing.

  The vibrations of the vibrator 20 include those that repeatedly move up and down, front and back (vertical and horizontal) on the same surface, and those that rotate on the same surface. The vibration sieve machine 10 of the present embodiment elastically supports the sieve mesh 30 on a pedestal installed on a foundation, and on the sieve mesh 30 while vibrating the sieve mesh 30 with the vibrator 20 that generates vibrations in the sieve mesh 30. The powder and granule are supplied to sieving to classify the powder and remove foreign matter.

[Recovery means]
The vibrating screen 10 of the present invention is provided with a collecting means 40 in the screen 30. In addition, the collection | recovery means 40 can be attached to any one or more of the sieve mesh 30 laminated | stacked by two or more. FIG. 1 is a perspective view showing a schematic configuration of the recovery means of the present invention. FIG. 2 is a plan view of the recovery means of the present invention. FIG. 3 is a front view of the recovery means of the present invention.
As shown in the figure, the collecting means 40 has an opening 42 and a damper 50 as the main basic components.

  The opening 42 is provided in a part of the sieve screen 30. The opening 42 is formed on the main surface of the plate 44 set to the same width as the width of the sieve screen 30. The plate 44 is a steel plate such as stainless steel having a predetermined strength as a material. The plate 44 can be attached to the downstream end of the sieve mesh 30 or a part of the sieve mesh 30 (between the mesh). The locations where the openings 42 are formed are provided at locations where the above sieved products gather on both sides in the width direction, in other words, on both ends excluding the center in the width direction. The shape of the opening 42 is larger than the mesh of the sieve mesh, and is formed as a long hole along the width direction of the sieve mesh 30. In the present embodiment, two openings 42 are provided symmetrically from the center in the width direction in the plan view of the sieve screen 30.

  With such a configuration of the opening 42, the sieved product flowing through both ends of the sieve mesh 30 in a plan view of the sieve mesh 30 can be dropped from the opening 42 and collected. Further, the sieved product near the center of the sieve mesh 30 in a plan view of the sieve mesh 30 can be discharged downstream along the flow direction.

A protective part 46 is attached around the opening of the opening 42. The protective part 46 can be made of an elastic material such as wear-resistant rubber resin or plastic resin in addition to metal. The protection part 46 has the same opening as the opening part 42 in plan view, and is formed in a flat plate shape that is larger than the second plate 56 described later, with a predetermined thickness that does not hinder the flow of the product on the sieve it can.
Such a configuration of the protection unit 46 prevents the sieve mesh 30 from being worn or deformed by contact with the sieve product flowing on the sieve mesh 30 or contact with the damper 50 to be described later. Life can be extended.

The damper 50 is attached above the opening 42. The damper 50 has a shaft 52, a first plate 54, and a second plate 56 as the main basic configuration.
The shaft 52 is arranged at a predetermined height from the main surface of the sieve mesh 30 and has an axial center along the width direction of the sieve mesh 30. The height at which the shaft 52 of the embodiment is mounted on the sieve screen 30 is set to a height that does not hinder the flow of the product on the sieve. Both ends of the shaft 52 are rotatably supported around the axes of a pair of bearings 53 sandwiching the width direction of the sieve mesh 30. A lever 53 a that rotates about the axis is provided at one end of the shaft 52. The longitudinal direction of the lever 53a is attached in parallel (along the main surface) to the main surface of the first plate 54 described later.

The first plate 54 is a flat plate having a vertical width substantially the same as the mounting height of the shaft 52, a horizontal width substantially the same as the width direction of the sieve screen 30, and a predetermined thickness. It is attached so as to extend in the radial direction from the axial center of the main body (along the radial direction).
The first plate 54 has a through hole 55 on the main surface. The through-hole 55 is arranged in a direction in which the first plate 54 is arranged in a direction orthogonal to the flow direction of the sieve product, in other words, the direction in which the main surface of the first plate 54 blocks the sieve product flowing on the sieve surface of the sieve mesh 30. The product on the sieve passes through the through-hole 55 and is discharged downstream so as not to obstruct the flow of the product on the sieve as much as possible.

The second plate 56 has a main surface in a direction orthogonal to the main surface of the first plate 54. In other words, the second plate 56 is bent 90 degrees from one end of the first plate 54 (L-shaped in cross section with the first plate 54). Is a connected flat plate. The 2nd plate 56 is set to the magnitude | size which can block the opening part 42 at least.
The main surface of the second plate 56 is basically formed in a flat plate shape along the main surface of the sieve screen 30. However, as described above, when the sieve screen 30 is formed in a mountain shape in a sectional view in which the central portion is higher than both sides, it can be formed in a shape along this mountain shape.
Such a 2nd plate 56 can block | close the opening part 42, rotating around the axis | shaft of the shaft 52 and pushing out the sieve top product on the sieve net 30 toward the upstream from the downstream. Further, the shaft 52 is attached at a position where the opening 42 can be closed by the second plate 56.
Each of the first and second plates 54 and 56 is made of an elastic material such as wear-resistant rubber resin or plastic resin. By such a configuration of the first and second plates 54 and 56, it is possible to prevent wear and deformation due to contact with the product on the sieve or contact with the sieve mesh, thereby extending the life of the entire apparatus. Can do.

With such a configuration of the damper 50, when the lever 53 a is rotated around the axis of the shaft 52 and the tip is disposed vertically downward, the main surface of the first plate 54 is disposed vertically from the main surface of the sieve mesh 30. The main surface of the second plate 56 is arranged in parallel with the main surface of the sieve screen 30. At this time, the second plate 56 is disposed so as to close the opening 42. A protective part 46 is sandwiched between the second plate 56 and the opening 42.
When the lever 53a is rotated from the downstream side toward the upstream side, the first plate 54 and the second plate 56 rotate around the axis of the shaft 52 and are separated from the opening 42 to the upper side of the sieve screen 30.

[Modification]
FIG. 4 is an explanatory view of a modified damper.
As illustrated, a modified damper 50A uses a connecting bar 58 instead of the first plate 56 shown in FIGS. Other configurations are the same, and the same reference numerals are given and detailed description is omitted. The connection bar 58 is a bar member that connects the shaft 52 and the second plate 56. The length of the connecting bar 58 is set to be substantially the same as the mounting height of the shaft 52. As shown in the drawing, a plurality of connecting bars 58 are attached at predetermined intervals so that the shaft center extends in the radial direction of the shaft 52 (along the radial direction).
In the damper 50A having such a configuration, the gap between the connecting bars 58 corresponds to a through hole, and the product on the sieve passes through this gap so that the flow of the sieve product can be discharged downstream so as not to be inhibited as much as possible. .

[Action]
The operation of the vibration sieve of the present invention having the above configuration will be described below.
When the product on the sieve screen 30 is discharged downstream, the tip of the lever 53a of the collecting means 40 is arranged vertically downward. The main surface of the second plate 56 is arranged in parallel with the main surface of the sieve screen 30. At this time, the second plate 56 is arranged so as to block the opening 42 by swinging while pushing the product on the sieve screen 30 from the downstream side to the upstream side while rotating around the axis. For this reason, the product on the sieve does not fall downward from the opening 42. The main surface of the first plate 54 is arranged in a direction perpendicular to the main surface of the sieve screen 30, and the product on the sieve passes through the through-hole 55 and further passes on the main surface of the second plate 56 to flow the product on the sieve. Can be discharged downstream without inhibiting. At this time, the shaft 52 serving as the rotation shaft of the first and second plates 54 and 56 is attached to a position on the main surface of the sieve screen 30 where it does not come into contact with the product on the sieve. There is no contact at all, and there is no risk of rotation failure.

  On the other hand, when the product on the sieve screen 30 is dropped downward from the opening 42, the lever 53a of the collecting means 40 is rotated upward from the downstream side to the upstream side, so that the shaft 52 is rotated around the axis. The 1st plate 54 and the 2nd plate 56 can rotate and can be arrange | positioned in the position away from the main surface of the sieve screen 30 upwards. The product on the sieve can be dropped downward from the opening 42 provided along the main surface of the sieve mesh 30. At this time, since the opening portions 42 are provided on both sides in the width direction of the sieve mesh 30, a large product on the sieve having a large particle size that collects on both sides in the width direction of the sieve mesh 30 is recovered and becomes the final product. The particle size distribution of the sand can be arbitrarily changed without any problems.

  According to such a vibration sieve machine of the present invention, in the conventional slide gate system, sand is caught in the gap of the slide part, resulting in a malfunction, and the sliding part needs to be cleaned. The work of getting inside and cleaning was dangerous. In addition, since the slide gate opens in the width direction from the center of the vibrating screen, only the product in the center of the screen has been mixed. In general, the products on the sieve mesh gather on both sides in the width direction and move on the mesh. Therefore, the center part of the sieve screen is higher than both sides. For this reason, the sieve mesh products gather and move on both sides. The sliding gate type double-opening type mixes products only in the center, and the single-opening type mixes products with large particle sizes at both ends. On the other hand, since the opening provided in the sieve mesh can be opened and closed in a short time, the product size on the sieve mesh can be recovered and mixed without deviation. In addition, the rotating shaft of the damper and the product on the sieve do not come into contact with each other and no rotation failure occurs, so failure and maintenance time are reduced, and long-term operation can be realized.

  The vibration sieve of the present invention is particularly useful in fields such as crushed stone work at construction sites and sorting work at chemical factories.

1 ......... Crushing sand production equipment, 2 ...... Raw material hopper, 3 ...... Vibrating feeder, 4 ...... Rotating crusher, 5 ...... Vibrating sieve, 6 ......... Return line, 10 ...... Vibrating sieve, 20 ... …… Vibrator, 30 ......... Sieve mesh, 40 ... Recovery means, 42 ......... Opening, 44 ......... Plate, 46 ......... Protecting part, 50, 50A ......... Damper, 52 ......... shaft, 53 ......... bearing, 53a ......... lever, 54 ......... first plate, 55 ......... through hole, 56 ......... second plate, 58 ...... connecting bar.

Claims (4)

An opening that opens larger than the mesh over the width direction of the sieve mesh and can drop the product on the sieve downward;
A shaft having an axial center disposed along a width direction of the sieve mesh at a predetermined height from the main surface of the sieve mesh, a first plate extending in a radial direction from the shaft center of the shaft, and the first plate A second plate having a main surface in a direction orthogonal to the main surface, wherein the second plate rotates around the axis of the shaft to close the opening;
A vibrating sieve comprising a collecting means comprising:   The damper is provided with a through hole in the first plate, and when the opening is closed by the second plate, the main surface of the first plate is arranged in a direction orthogonal to the flow direction of the product on the sieve screen. The vibrating sieve machine according to claim 1, wherein:   The vibrating screen according to claim 1, wherein the opening portion is provided with a protection portion at a location where the opening contacts the damper.   The vibration sieve machine according to claim 3, wherein the damper and the protection part are made of an elastic material.