JP6020686B2 - Vibrating sieve machine - Google Patents

Description

  The present invention relates to a vibration sieve machine.

  For example, a molded article such as a catalyst or ceramic is manufactured by cutting an extruded product in a direction perpendicular to the length direction. Such a molded product is stable because the shape of the cut surface is determined by the shape of the die, but the shape in the length direction may vary depending on the material characteristics and cutting conditions. Particularly in the case of a catalyst, such a variation in shape affects the reaction results, so that it is necessary to suppress the variation in shape within a certain range.

  As a method for suppressing such a variation in the shape of the molded product, a method of sieving according to the length using a vibration sieving machine may be mentioned. As the vibration sieve machine, for example, there is a vibration sieve machine having a sieve mesh with a predetermined opening for sieving the material and a vibrating body for vibrating the sieve mesh, and feeding the material to be sieved onto the sieve mesh. Known (for example, Patent Document 1). However, when using the vibrating sieve machine to screen a long molded product according to the length in the length direction, the mesh opening of the screen is larger than the length in the direction perpendicular to the length direction of the molded product. Also grows. For this reason, among the input molded articles, those dropped in an upright state pass through the mesh of the sieve mesh as they are, and the accuracy of sieving cannot be sufficiently improved.

Therefore, as a vibration sieving machine with further improved sieving accuracy, it has a partition part consisting of an annular sieving mesh part and a holding part without holes provided inside the sieving mesh part. A vibration sieving machine that feeds a material to be directed toward the holding unit is disclosed (for example, Patent Document 2).
Specifically, as shown in FIG. 4, a base 110; a cylindrical body 112 installed on the base 110 via a coil spring 110 a; a long length supplied into the body 112 A holding part 114 for temporarily holding the material X and a screen part 116 for sieving the material X, and a partition part 118 for vertically partitioning the body part 112; and a vibrating part 120 for vibrating the body part 112. A vibrating screen 101 is shown. The upper part of the trunk part 112 is provided with a cover plate 122 in which an inlet 122 a is formed, and an upper discharge outlet 124 is provided in an upper side wall part of the partition part 118 of the trunk part 112, so that the partition part of the trunk part 112 is provided. A lower discharge port 126 is provided in a lower side wall portion 118. In the vibration sieving machine 101, the trunk portion 112 vibrates when the vibrating portion 120 vibrates. The material X charged from the charging port 122a is once held on the holding part 114, and is screened by moving to the sieve net part 116 by vibration. Therefore, it is possible to prevent the long material X that has been input from dropping in an upright state and passing through the mesh of the sieve net 116 as it is. The material X that has not passed through the sieve screen 116 is discharged from the upper discharge port 124, and the material X that has passed through the screen mesh 116 is discharged from the lower discharge port 126.
In Patent Document 2, an annular punching plate in which a large number of punch holes are formed is used as the sieve net portion 116, and a flat plate without punch holes is used as the holding portion 114.

JP 2003-1193 A JP 2006-159067 A

  However, even if the long material X is screened using the vibrating screen 101, the material X cannot be sufficiently prevented from passing through the screen net 116 in an upright state. Therefore, it is desired to further improve the accuracy of sieving.

  An object of this invention is to provide the vibration sieving machine which can be screened with high precision according to the length even if it is a long material.

The vibrating screen machine of the present invention is obtained by cutting an extruded product in a direction perpendicular to the length direction, without bringing a long material having a length in the length direction longer than the length in the vertical direction into an upright state. A vibration sieving machine for sieving according to the length in the length direction, a cylindrical body, a holding part for temporarily holding a long material supplied into the body, and a sieve for sieving the long material A partition part for partitioning the inside of the body part up and down, in which a mesh part is formed, and on the sieve mesh part in the body part, a distance from the sieve mesh part is equal to or less than an opening of the screen mesh part, and the sieve A baffle plate provided so that the elongate material can move through a gap with the net part, and a vibration part that vibrates the body part.

  The vibration sieving machine of the present invention can be screened with high accuracy according to its length even if it is a long material.

It is sectional drawing which cut | disconnected the vibration sieve machine of this invention to the perpendicular direction. It is sectional drawing which cut | disconnected the vibration sieve machine of FIG. 1 by the straight line I-I '. It is sectional drawing which showed the other example of the vibration sieve machine of this invention. It is sectional drawing which cut | disconnected the conventional vibration sieve machine to the perpendicular direction.

Hereinafter, an example of the vibration sieving machine of the present invention will be described in detail.
As shown in FIG. 1 and FIG. 2, the vibration sieving machine 1 of the present embodiment includes a base 10; a cylindrical body 12 installed on the base 10; and a material supplied into the body 12. A holding part 14 for temporarily holding X and a screen part 16 for sieving the material X, and a partition part 18 for partitioning the inside of the body part 12 up and down; on the screen part 16 in the body part 12; A baffle plate 22 provided so that the distance to the portion 16 is less than the mesh opening of the sieve mesh portion 16 and the material X can move through the gap with the sieve mesh portion 16; and a vibrating portion 24 for vibrating the trunk portion 12 And having;

The body portion 12 is provided on the base 10 via a coil spring 26. The trunk portion 12 is a portion that vibrates when the vibrating portion 24 vibrates and screens the material X supplied into the trunk portion 12 by the sieve mesh portion 16.
The trunk portion 12 has a lid plate 28 at the top. The lid plate 28 is provided with a loading port 28a through which the material X is loaded in the center portion. A cylindrical tube portion 28b is formed below the input port 28a in the cover plate 28, and this tube portion 28b is connected to the inside of a baffle plate 22 to be described later. Further, an upper discharge port 30 through which the material X that has not passed through the screen mesh portion 16 of the partition portion 18 is discharged is formed in the upper side wall portion of the partition portion 18 in the body portion 12.

An annular locking portion 32 extending inward is provided on the inner wall surface of the body portion 12, and the partition portion 18 is locked to the locking portion 32 in the body portion 12. A method for locking the partition portion 18 to the locking portion 32 is not particularly limited, and examples thereof include screwing. The partition portion 18 is formed with a holding portion 14 that holds the material X at a central portion thereof, and an annular sieve net portion 16 is formed around the holding portion 14. In the partition portion 18, an annular outer peripheral portion 20 through which the material X does not pass is further formed around the sieve net portion 16. The shape of the partition 18 is a flat plate in this example, but is not limited to a flat plate.
The material X that has reached the outer peripheral portion 20 without passing through the sieve mesh portion 16 is discharged from the upper discharge port 30.

  The holding portion 14 is provided below the charging port 28a formed in the center of the lid plate 28, and the material X that has been charged from the charging port 28a and passed through the cylindrical portion 28b is temporarily held on the holding portion 14. It is like that. In the vibration sieving machine 1, the cylindrical portion 28 b is provided, so that the material X charged from the charging port 28 a is more stably guided onto the holding portion 14.

  The sieve net part 16 is a part for sieving the material X. As the sieve mesh part 16, a sieve mesh usually used in a vibration sieve machine can be used. Moreover, the punching board in which the several punch hole of a predetermined | prescribed hole diameter was formed may be sufficient.

The mesh opening of the screen mesh portion 16 can be appropriately set according to the size of the material X to be screened. In particular, the vibration sieving machine 1 is suitable for sieving a long material X in accordance with the length in the length direction. In this case, the opening of the screen mesh portion 16 is the length in the length direction of the material X. Set according to.
In the present invention, the mesh opening of the screen mesh portion is the interval between the mesh portions, and means the length of the gap between the linear objects constituting the mesh.

  A lower discharge port 34 for discharging the material X that has passed through the sieve mesh part 16 is provided on the lower side wall of the partition part 18 in the body part 12. In addition, a guide plate that is inclined so as to be lowered from the center toward the outside on the lower side of the partition portion 18 in the body portion 12 and guides the material X that has passed through the screen mesh portion 16 to the lower discharge port 34. 36 is provided.

The baffle plate 22 can move the material X on the sieve mesh portion 16 in the body portion 12 so that the distance from the sieve mesh portion 16 is less than the mesh opening of the sieve mesh portion 16 and through the gap with the sieve mesh portion 16. It is provided as follows. That is, the shape of the baffle plate 22 is an annular shape, similar to the shape of the sieve net part 16. The inner side of the baffle plate 22 is connected to the cylindrical portion 28b.
The baffle plate 22 restricts the movement of the material X on the sieve net 16. That is, the baffle plate 22 suppresses movement of the material X from the holding portion 14 to the sieve net 16 in a state where the material X has risen, and the rise of the long material X due to vibration on the sieve net 16. . It is preferable that the baffle plate 22 is provided in parallel with the screen mesh portion 16 as in this example from the viewpoint that the above-described effect is easily obtained.

The distance D between the screen mesh portion 16 and the baffle plate 22 is equal to or smaller than the mesh opening of the screen mesh portion 16. Thereby, it can suppress that material X longer than the opening of the sieve mesh part 16 becomes an upright state on the sieve mesh part 16, and passes the sieve mesh part 16. FIG. The distance D means the longest distance among the distances between the screen net 16 and the baffle plate 22 when the baffle plate 22 is inclined with respect to the screen net 16.
The upper limit value of the ratio of the distance D to the mesh opening of the sieve mesh part 16 is 0.9 times because the accuracy of sieving the material X is improved and the movement of the material X in the sieve mesh part 16 is good. Is preferable, and 0.95 times is more preferable. The lower limit value of the ratio of the distance D to the mesh opening of the sieve mesh portion 16 may be a value that allows the material X to move through the gap between the sieve mesh portion 16 and the baffle plate 22 without being in an upright state.

  In the vibration sieving machine 1, a circular opening 38 a is formed in the central portion of the bottom portion 38 of the trunk portion 12, and an opening 40 a is also formed in the upper portion 40 of the base 10. And the vibration part 24 is being fixed to the bottom part 38 of the trunk | drum 12 so that the opening 38a of the trunk | drum 12 and the opening 40a of the base 10 may be penetrated. In the vibration sieving machine 1, the body 12 installed on the base 10 via the coil spring 26 vibrates when the vibration unit 24 vibrates.

  The vibration part 24 may be anything that can vibrate itself and vibrate the body 12, and examples thereof include a vibration motor. In this example, a substantially semicircular plate-like upper unbalance weight 24a and lower unbalance weight 24b are attached to the top and bottom of the vibration portion 24. The material X once held on the holding portion 14 has a mountain shape with a high center, but the vibration portion 24 can be set by appropriately setting the phase angle of the upper unbalance weight 24a and the lower unbalance weight 24b of the vibration portion 24. The material X can be moved radially toward the outer peripheral direction of the partitioning portion 18 by the vibration.

Hereinafter, the operation of the vibration sieve machine 1 will be described. The vibration sieving machine 1 is particularly suitable for sieving the long material X according to the length in the length direction.
The vibration part 24 is activated to vibrate the body part 12, and the material X is introduced into the body part 12 from the charging port 28 a of the lid plate 28. The charged material X is temporarily held on the holding part 14 and moved onto the sieve mesh part 16 by vibration, and the material X shorter than the mesh of the sieve mesh part 16 passes through the sieve mesh part 16 and falls. To do. At this time, since the material X is once held on the holding portion 14, the material X introduced from the insertion port 28a is prevented from passing through the sieve mesh portion 16 as it is in an upright state. Further, since the baffle plate 22 is provided, the material X that is longer than the opening of the sieve mesh portion 16 moves from the holding portion 14 to the sieve mesh portion 16 in an upright state, or the sieve mesh portion. 16 is prevented from being upright. Therefore, the material X that is longer than the mesh of the sieve mesh portion 16 moves stably to the outer peripheral portion 20 without passing through the sieve mesh portion 16 and is discharged from the upper discharge port 30 to the outside of the trunk portion 12. Thus, in the vibration sieving machine 1, even the long material X can be screened with high accuracy according to the length in the length direction.
The material X having a length equal to or smaller than the mesh size of the sieve mesh portion 16 is guided to the lower discharge port 34 by the guide plate 36 after being passed through the sieve mesh portion 16 and is discharged to the outside of the trunk portion 12.

The material X to be screened by the vibration sieving machine 1 is not particularly limited. The vibration sieving machine 1 is particularly effective for sieving long materials X.
Examples of the long material X include a molded product obtained by cutting an extruded material such as a catalyst or ceramic in a direction perpendicular to the length direction. In addition, the material X is not limited to these molded products, and various materials such as foods, chemicals, and various industrial raw materials can be applied.

Usually, when a long material is screened according to the length in the length direction by a vibrating screen machine having a screen, the opening of the screen is larger than the length of the long material in the direction perpendicular to the length direction. Also grows. Therefore, in a conventional vibration sieving machine, when a long material is brought into an upright state on the sieving net by vibration, the material that should originally remain on the sieving net may pass through the sieving net.
On the other hand, the vibration sieving machine of the present invention is provided with a baffle plate on the sieve mesh part, so that it is possible to prevent the long material from standing upright on the sieve mesh part. According to the length in the length direction, it can be screened with high accuracy.

The vibration sieve machine of the present invention is not limited to the vibration sieve machine 1 described above as long as it has the baffle plate. For example, the input port for supplying the material may not be the center of the lid plate. Moreover, the holding part formed in a partition part does not need to be a center. For example, as shown in FIG. 3, the input port 28A is provided on the lower discharge port 34 side of the cover plate, the half on the lower discharge port 34 side is the holding portion 14A, and the half on the upper discharge port 30 side is the sieve net 16A. It may be a vibrating screen having a partition 18A and a semicircular baffle 22A covering the partition 18A. In this case, in order to facilitate the movement of the supplied material X to the upper discharge port 30 side, the partition portion 18A may be provided so as to be inclined toward the upper discharge port 30 side.
Moreover, the upper side discharge port and the lower side discharge port may be provided annularly along the side wall of the trunk portion.

EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by the following description.
In this example, the following extrusion catalyst was screened as the material X.
[Extruded catalyst]
Composition ratio is _{Mo 12 Bi 0.8 Fe 1.5 Sb 0.7} Co 8 Zn 0.2 catalyst for isobutylene oxidation of _{Cs 0.5,} what was extruded into a cylindrical shape with a diameter of 6 mm, length In a direction perpendicular to the direction, a molded catalyst A (90% by mass) cut so as to have a length of 9 mm or less and a product extruded into a cylindrical shape having a diameter of 6 mm were perpendicular to the length direction. And a mixture of molded catalyst B (10% by mass) cut so as to have a length larger than 9 mm.

[Example 1]
1 and 2 (the inner diameter of the body portion: 500 mm, the diameter of the insertion port 28a: 100 mm, the diameter of the holding portion 14: 110 mm, the opening of the sieve mesh portion 16: 9 mm, the sieve mesh portion) 16 and the baffle plate 22 (D = 8.5 mm) was used to screen the extruded catalyst.
As a result, the ratio of the forming catalyst B contained in the extrusion forming catalyst discharged from the lower discharge port 34 was 0% by mass, and the forming catalyst A and the forming catalyst B could be screened with high accuracy.

[Comparative Example 1]
Extrusion catalyst was screened using the vibrating screen 101 illustrated in FIG. 4 having the same form as the vibrating screen 1 except that the baffle plate 22 was not provided.
As a result, the ratio of the molded catalyst B contained in the extrusion molded catalyst discharged from the lower discharge port was 2.0% by mass, and the screening accuracy was insufficient.

[Comparative Example 2]
The same vibration sieve machine as the vibration sieve machine 1 is used except that the baffle plate 22 is not provided and a partition portion having a punching plate with a punch hole having a diameter of 9 mm and a punching pitch of 4 mm is provided instead of the sieve mesh portion 16. The extrusion catalyst was screened.
As a result, the ratio of the molded catalyst B contained in the extrusion molded catalyst discharged from the lower discharge port was 1.5% by mass, and the screening accuracy was insufficient.

DESCRIPTION OF SYMBOLS 1 Vibrating screen machine 10 Base 12 Body part 14, 14A Holding part 16, 16A Sieve net part 18, 18A Partition part 20 Peripheral part 22, 22A Baffle plate 24 Vibrating part 26 Coil spring 28 Cover plate 28a, 28A Input port 30 Upper side Discharge port 32 Locking portion 34 Lower discharge port 36 Guide plate X Material

Claims (1)

Depending on the length of the extruded material, which is obtained by cutting the extruded material in a direction perpendicular to the length direction, with the length in the length direction being longer than the length in the vertical direction, without making the material upright. A vibrating sieve machine that sifts through
A tubular body,
A partition part for vertically partitioning the inside of the body part, in which a holding part for temporarily holding the long material supplied into the body part and a screen net part for sieving the long material are formed;
Provided on the sieving mesh part in the trunk part so that the distance from the sieving mesh part is not more than the mesh opening of the sieving mesh part, and the long material can move through the gap with the sieving mesh part. With baffle plates,
And a vibrating screen that vibrates the body.

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