JPH0725976U - Classifier - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the classification efficiency and reduce the maintenance man-hours required for monitoring, cleaning and replacement. [Structure] Stacked in multiple stages, with outlets a and b respectively
A sieve 1a, 1b in which is formed, a charging port 8 for charging the object W to be classified into the uppermost sieve 1a, and a vibration source 3 for vibrating the sieves 1a, 1b. A dispersion plate 9 having a mesh larger than the mesh of the sieve 1a and being vibrated by the vibration source 3 is provided at least between the uppermost sieve 1a and the charging port 8 and the material to be classified is sieved from the charging port. To prevent falling locally.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a classifying device for classifying solids such as pulverized products into a desired size by using a sieve, and more particularly to a classifying device capable of uniformly introducing an object to be classified into the sieve.

[0002]

[Prior art]

 A classifier equipped with a sieve is often used as a device for classifying the crushed material into a certain size after crushing a solid using a crusher. As a conventional classifier, for example, as shown in FIG. 2, a plurality of sieves 1a and 1b having wire meshes 6a or bottom plates 6b having different mesh sizes are stacked in the order of smaller meshes, and a vibration source 3 is provided at the bottom. Classifiers are known. According to this type of vibrating classifier, when the pulverized material W is put into the upper sieve 1a and the vibration source 3 is operated, the pulverized material that cannot pass through the wire mesh 6a having the predetermined mesh is transferred to the upper sieve 1a. The pulverized material discharged from the discharge outlet a and the duct 7a provided, while passing through the wire net 6a, reaches the lower sieve 1b and is discharged from the discharge outlet b and the duct 7b. By the way, since only one type of wire net 6a is provided in the vibrating type classifier shown in FIG. 2, the crushed material is eventually classified into two types of sizes taken out from the ducts 7a and 7b. .

[0003]

[Problems to be solved by the device]

 However, when the crushed material W is charged from the charging port 8 into the upper sieve 1a, the crushed material locally drops near the center of the wire mesh (indicated by "C" in the drawing) as shown in FIG. There is a problem in that it is easy to cause clogging. In particular, according to the research conducted by the present inventor, when a pulverized product containing iron oxide is classified by a wet classifier, iron oxide is likely to adhere to a wire mesh (made of SUS) immediately below the charging port, which causes such a situation. If the pulverized material is continuously charged in, the amount of iron oxide adhering to the wire mesh gradually increases, which reduces the size of the mesh. Therefore, even if the size of the pulverized product is smaller than the actual mesh, it is often the case that the crushed product cannot pass through the sieve 1a and is discharged from the duct 7a due to the reduction of the opening area.

In order to solve such a problem, conventionally, iron oxide adhering to the wire net is removed by regularly washing with an aqueous solution of hydrochloric acid or the like, or the wire net 6a is replaced when it cannot be removed by washing. It was obligatory. However, such a method not only increases the maintenance man-hours for monitoring whether or not clogging has occurred and cleaning the wire netting, but since the wire netting 6a is fixed to the sieve casing 5a, the wire netting 6a is fixed. It was necessary to remove the upper sieve 1a when replacing the filter, which was extremely troublesome work.

Further, when it is desired to collect a large amount of the classified product obtained from the lower sieve 1b, the classified product of this size is also contained in the classified product discharged from the upper stage. The provisional measure was taken to re-introduce (or a plurality of times) the classified substances discharged from the upper duct 7a into the classifying device. As described above, the conventional classification device has a problem that the classification efficiency is remarkably reduced and the classification time is increased depending on the pulverized material of a desired size.

The present invention has been made in view of the above problems of the conventional technology, and an object thereof is to increase the classification efficiency and reduce the maintenance man-hours required for monitoring, cleaning and replacement. .

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the classifying device of the present invention has, in an empty chamber partitioned by a sieve, sieves each having a discharge port, and an inlet for introducing a substance to be classified into the sieve, and In a classifier equipped with a vibration source for applying vibration to the sieve, a dispersion plate having a mesh larger than the square mesh is provided on the sieve at a position facing the charging port in the chamber. I am trying.

[0008]

[Action]

 In the classifying device of the present invention, a material to be classified such as a pulverized material is put into the uppermost sieve from the charging port and the vibration source is activated to vibrate the sieve, but the target is located at the position facing the charging port. Since the dispersion plate having a larger mesh is provided, the material to be classified that has fallen from the charging port reaches the dispersion plate first. Then, the material to be classified passes through the openings of the dispersion plate, and since the dispersion plate is also vibrating by the vibration source, it falls uniformly over the entire uppermost sieve. In this way, when the substance to be classified is dispersed and dropped on the uppermost sieve, it is possible to prevent local introduction of the substance to be classified, which prevents the substance from adhering to the eye and eliminates classification of the substance to be classified. Efficiency will increase.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially sectional side view showing a classifier according to an embodiment of the present invention.

The classification device of this embodiment has a vibration source 3 at the bottom, vibrates vertically at a desired frequency, and transmits this vibration to the sieves 1a, 1b located at the top. The frequency and amplitude of the vibration given from the vibration source 3 are appropriately selected according to the type of the object to be classified. Sieves 1a and 1b piled up in multiple stages (two stages in this embodiment) are provided above the vibration source 3, and the sieve 1b in the lower stage aggregates the finely divided pulverized products as compared with the sieve in the upper stage. Then, it is adapted to be discharged to the outside from the discharge port b opened on the side surface of the sieve 1b through the duct 7b. Therefore, the lower screen 1b has a structure in which the bottom plate 6b is attached to the casing 6b instead of the tip.

A sieve 1a having a structure in which a sieve 6a having a size to be classified is attached to a casing 5a is stacked on the upper portion of the lower sieve 1b, and the crushed powder having passed through the eyes of the dispersion plate 9 is crushed. The product W is sieved by the vibration from the vibration source 3, and the crushed product that has not passed through the sieve 6a of the screen 1a is discharged to the outside through the duct 7a from the discharge port a provided on the side surface. There is.

Further, a top plate 2 having an opening 10 is detachably attached to the upper part of the upper sieve 1a, and the crushed material W dropped from the charging duct 8a having the charging port 8 is opened. It passes through the portion 10 and falls onto the dispersion plate 9. The dispersion plate 9 is made of SUS wire mesh or punching metal having a larger mesh than the mesh of the upper die 6a, and has a conical section. Further, the angle α of the top surface shown in FIG. 1 can be appropriately changed depending on the weight of the pulverized product W, the particle size and the input amount so that the pulverized product is most uniformly dispersed, but in the experimental example, 172 ° to 90 °. We obtained the result that ° was favorable. The dispersion plate 9 is fixed to the above-mentioned top plate 2 via the bracket 4, so that the vibration source 3 vibrates the top plate 2 and the sieves 1a and 1b. Further, the mesh size of the dispersion plate 9 may be at least larger than that of the upper mesh 6a, and its specific size can be set appropriately. The shape of the squares can also be changed as appropriate, and can be selected, for example, in the form of a triangle, a diamond, a quadrangle, a circle, an ellipse, etc. in consideration of the sliding direction of the pulverized material on the dispersion plate.

The dispersion plate 9 in the present invention is not limited to the shape shown in the figure. In short, a part of the pulverized material W dropped from the charging port 8 passes through the eyes of the dispersion plate 9, It is only necessary that the pulverized product of No. 6 falls along the slope without passing through the eyes, so that the pulverized product is evenly dispersed and drops with respect to the upper stage 6a. The dispersion plate 9 may be provided on at least the uppermost sieve 1a. This is because if the crushed material uniformly drops onto the uppermost through-hole 6a, it will also uniformly drop onto the sieve 1b below that.

Next, the operation will be described. While vibrating the sieves 1a and 1b by operating the vibration source 3, the material W to be classified such as a pulverized material is fed into the upper sieve 1a from the charging port 8 through the opening 10. The crushed material W charged from the charging port 8 passes through the opening 10 and then first drops onto the dispersion plate 9. Here, since the dispersion plate 9 is vibrating in the same manner as the other sieves 1a, 1b and the top plate 2, a part of the pulverized material W dropped on the dispersion plate 9 passes through the second edge of the dispersion plate 9. And falls on the upper end 6a. Further, other crushed materials fall along the slope of the dispersion plate 9, part of them pass through the eyelet and reach the upper boss 6a, and the remaining crushed material also moves from the periphery of the dispersion plate 9 to the upper level. It drops onto the noshi 6a.

Due to the action of the dispersion plate 9 as described above, the pulverized material W supplied from the charging port 8 is uniformly dropped onto the upper diaper 6a, and the clogging of the diaper 6a can be prevented. it can. As a result, the size of the mesh of the diaper 6a can be maintained by controlling the classification action, so that the classified product can be obtained in the size to be classified. The crushed material of a size that does not pass through the upper sill 6a is taken out from the outlet a through the duct 7a, while the fine crushed material that has passed the eyes of the upper sill 6a is along the slope of the bottom plate 6b. And is guided to the discharge port b and taken out from the duct 7b.

It should be noted that the embodiments described above are described for facilitating the understanding of the present invention, but not for limiting the present invention. Therefore, each element disclosed in the above-described embodiments is intended to include all design changes and equivalents within the technical scope of the present invention. For example, although the sieve has two stages in the above-described embodiment, the number of stages of the sieve in the classifying device of the present invention is not particularly limited and may be three or more.

[0017]

[Effect of device]

 Since the classifying device of the present invention has the dispersion plate at a position facing the loading port in the empty chamber of the sieve having a larger mesh than the sieve opening, the material to be classified falls locally from the loading port to the sieve. Even if it is dispersed evenly. As a result, it is possible to prevent the clogging of the sieve mesh and the classified material having a coarse particle size from passing through, and it is possible to reduce the maintenance man-hours required for monitoring, cleaning and replacement of the particle size of the sorting material and clogging. In addition, since the size of the object to be classified becomes constant if the size of the first edge can be maintained, it is possible to perform classification in a short time without requiring reclassification.

[Submission date] March 28, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The classification apparatus of this embodiment has a vibration source 3 at the bottom, vibrates vertically at a desired frequency, and transmits this vibration to the sieves 1a, 1b located at the top. The frequency and amplitude of the vibration given from the vibration source 3 are appropriately selected according to the type of the object to be classified. Sieves 1a and 1b stacked in multiple stages (two stages in this embodiment) are provided above the vibration source 3, and the sieve 1b in the lower stage aggregates the finely pulverized material more finely than the sieve in the upper stage. Then, it is adapted to be discharged to the outside from the discharge port b opened on the side surface of the sieve 1b through the duct 7b. Therefore, the lower sieve 1b has a structure in which the bottom plate 6b is attached to the casing 5b instead of the tip.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

[0017]

[Effect of device]

Since the classifier of the present invention is provided with the dispersion plate at a position facing the loading port in the empty chamber of the sieve having a larger mesh than the sieve opening, the material to be classified falls locally from the loading port to the sieve. Even if it is dispersed evenly. As a result, you to prevent through eye clogging of sieves, sorting granularity, monitoring and cleaning of clogging, it is possible to reduce the maintenance effort required for the replacement. Further, since the size of the object to be classified becomes constant when the size of the perforations can be maintained, the classification can be performed in a short time without the need for reclassification.

[Brief description of drawings]

FIG. 1 is a partially sectional side view showing a classification device according to an embodiment of the present invention.

FIG. 2 is a partially sectional side view showing a conventional classification device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sieve 1a ... Upper stage 1b ... Lower stage 2 ... Top plate 3 ... Vibration source 4 ... Bracket 5a ... Upper stage casing 5b ... Lower stage casing 6a ... And 6b ... Bottom plate 7a ... Upper stage sieve Duct 7b ... Lower sieve duct 8 ... Inlet 8a ... Duct 9 ... Dispersion plate 10 ... Opening W ... Crushed product (classified object) a ... Upper sieve outlet b ... Lower sieve outlet A, B ... Vacancy

Claims (1)

[Scope of utility model registration request] 1. A sieve (1a, 1b) having a discharge port (a, b) formed therein is provided in each of the empty chambers (A, B) partitioned by a sieve (6a). A charging port (8) for charging the material to be classified (W), and the sieve (1a, 1)
In a classifier equipped with a vibration source (3) for imparting vibration to b), a dispersion having a larger eye than the diaper at a position facing the input port (8) in the empty chamber (A). A classifying device comprising a plate (9) provided on the sieve (1a).