JP6365262B2 - Method for operating crushed sand production apparatus and crushed sand production apparatus - Google Patents

Description

  The present invention relates to an apparatus for producing crushed sand having a vibrating screen for crushed stone sorting in a crushed stone factory or a raw material used in a chemical factory, and an operating method thereof.

  Vibrating sieves are used for the purpose of selecting the particle size of various granular materials in civil engineering and building material factories and chemical factories. The structure is such that a screen having a large number of holes made of wire mesh, metal plate, resin, or rubber is vibrated in a vibrator. The vibration sieving machine performs sieving of the granular material supplied on the screen by repeatedly oscillating within the same plane that combines the vertical and horizontal directions.

  Here, when the screen of the vibration sieve is clogged by the passage of various powder particles, the sieving efficiency is lowered. For this reason, between the screens that form the upper and lower pairs, a tapping member is regularly provided for the purpose of removing the granular material that causes clogging (see Patent Documents 1 and 2). .

  Since the tapping member is deployed for the purpose of bouncing on the screen, it is generally made of a resin such as rubber. In the vibrating screen disclosed in Patent Document 1, the tapping member is located downstream. In order to prevent concentration, a partition plate is provided on the screen at every desired interval, and a tapping member is provided between the partition plates. Thereby, there is no possibility that the tapping member concentrates on the downstream side or is discharged together with the granular material that has not passed through the screen.

  Moreover, in the vibration sieve machine disclosed by patent document 2, in order to improve the efficiency which eliminates clogging of a screen, employ | adopting the tapping member which provided the protrusion on the outer periphery of a spherical body is disclosed. By adopting a tapping member having a protrusion on the outer periphery, clogging can be directly eliminated when the protrusion enters the hole of the screen, so that the wiping effect of the powder particles adhering to the screen is increased.

Japanese Patent No. 2564109 Japanese Utility Model Publication 4-22078

  The techniques disclosed in Patent Documents 1 and 2 are effective means for the purpose of improving the biasing tapping member and improving the clogging elimination effect. However, in any technique, the tapping member is held on the screen by using a partition or a wiring so that the powder and the tapping member for sieving are not mixed on the discharge side.

  For this reason, the tapping member becomes a resistance that blocks the flow of the granular material targeted for sieving, and the sieving efficiency is reduced, such as periodic inspection to check whether the tapping member is damaged or replacement. It was also a cause to invite.

  Therefore, an object of the present invention is to provide a crushed sand manufacturing apparatus that can eliminate the need for the tapping member to interfere with the flow of the granular material and eliminate the need for inspection and replacement, and an operation method thereof. .

  The crushed sand production apparatus according to the present invention for achieving the above object comprises a raw material supply means for storing crushed sand raw material, a crushing means for crushing the crushed sand raw material supplied from the raw material supply means, and a sieving screen. An apparatus for producing crushed sand comprising a vibrating screen, wherein the vibrating screen includes a crushed sand larger than an opening of the sieving screen selected from the crushed sand raw material stored in the raw material supply means. Tapping raw material supply means for directly supplying the raw material as a tapping member is provided.

Further, in the crushed sand production apparatus having the above characteristics, the screen for sieving provided in the vibration sieving machine has an upper screen and a lower tier that is finer than the upper screen and has an opening corresponding to the desired particle size of the crushed sand. It is preferable that a supply path from the tapping material supply means is provided so that the tapping member is supplied to both the upper screen and the lower screen.
By having such a feature, it is possible to obtain an effect of eliminating clogging of both the upper screen and the lower screen.

Furthermore, in the crushed sand production apparatus having the above characteristics, a raw material having a particle size determined as a particle size suitable for the tapping member is disposed in a path for discharging the raw material that has not passed through the sieving screen in the vibrating sieve machine. Sieving means for sieving, and a return path for returning the sieved raw material to the tapping raw material supply means.
By having such characteristics, a crushed sand material having a particle size suitable for the tapping member can be reused. For this reason, even if there is a low probability that the crushed sand raw material stored in the raw material supply means contains a crushed sand raw material having a suitable particle size, there is no possibility that the crushed sand raw material as a tapping member will be lost.

  In addition, the operating method of the crushed sand production apparatus according to the present invention for achieving the above object includes a raw material supply means for storing crushed sand raw material, a crushing means for crushing the crushed sand raw material supplied from the raw material supply means, and a sieve. A crushed sand production apparatus comprising a vibrating screen having a sieving screen, wherein the crushed sand raw material larger than the opening of the sieving screen is directly supplied to the sieving screen as a tapping member. It is characterized by doing.

Further, in the operating method of the crushed sand production apparatus having the above characteristics, when the sieving screen is composed of a coarse upper screen and a fine lower screen, the tapping member is used as the upper screen and the lower screen. Can be supplied to both screens.
By having such a feature, it is possible to obtain an effect of eliminating clogging of both the upper screen and the lower screen.

Further, in the operation method of the crushed sand production apparatus having the above characteristics, the raw material having a particle size determined as the particle size suitable for the tapping member is sieved from the raw materials that have not passed through the sieving screen. The tapping member may be reused.
By having such characteristics, a crushed sand material having a particle size suitable for the tapping member can be reused. For this reason, even if there is a low probability that the crushed sand raw material stored in the raw material supply means contains a crushed sand raw material having a suitable particle size, there is no possibility that the crushed sand raw material as a tapping member will be lost.

  According to the crushed sand manufacturing apparatus and the operation method having the above-described features, there is no possibility that the tapping member hinders the flow of the granular material as the crushed sand raw material. Further, it is not necessary to make the tapping member a target for inspection or replacement. Therefore, the efficiency of crushed sand production can be improved.

It is a block diagram which shows the structure of the crushed sand manufacturing apparatus which concerns on 1st Embodiment. It is an enlarged view which shows the detailed structure of a vibration sieve. It is a figure which shows the structural example in the case of selecting a tapping member with a vibration feeder. It is a block diagram which shows the structure of the crushed sand manufacturing apparatus which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the crushed sand manufacturing apparatus and the operation method of the present invention will be described in detail with reference to the drawings.

[Outline of the First Embodiment]
First, with reference to FIG. 1, the whole structure of the crushed sand manufacturing apparatus 10 which concerns on 1st Embodiment is demonstrated. The crushed sand manufacturing apparatus 10 according to the embodiment is configured based on a raw material hopper 12, a crusher 18, and a vibration sieve machine 22.

[Raw material hopper]
The raw material hopper 12 is a raw material supply means for storing crushed sand raw materials such as stones and crystals for producing crushed sand and supplying a required amount of crushed sand raw material.

[Crushing machine]
The crusher 18 is an apparatus that crushes the crushed sand raw material supplied from the raw material hopper 12 to create particles (sand) having a small particle diameter. In the present embodiment, a rotary crusher is employed as the crusher 18. A vibrating feeder 14 and a belt conveyor 16 are disposed between the raw material hopper 12 and the crusher 18. In the vibration feeder 14, the crushed sand raw material discharged in a mountain shape from the raw material hopper 12 is conveyed while being leveled and supplied to the belt conveyor 16. The belt conveyor 16 conveys the crushed sand raw material supplied from the vibration feeder 14 at a constant speed and supplies it to the crusher 18.

[Vibrating sieve]
The crushed sand raw material discharged from the crusher 18 is supplied to the vibration sieve 22 through the belt conveyor 20. The vibration sieving machine 22 is an apparatus for sieving the crushed sand raw material according to the size (particle size) of the grains. As shown in detail in FIG. 2, the vibrating screen 22 is provided with an upper screen 24 and a lower screen 26. The upper screen 24 is a sieve mesh having a coarser mesh than the lower screen 26, and the lower screen 26 is a sieve mesh having openings corresponding to the desired particle size of the crushed sand. In the present embodiment, a sieve screen having an opening of 5 mm is adopted as the upper screen 24, and a sieve mesh having an opening of 2.5 mm is adopted as the lower screen 26. Further, the product passage 28 including the upper screen 24 and the lower screen 26 is configured such that the crushed sand raw material that has not passed through the screen is supplied from the supply port 30 to which the sieving screen (the upper screen 24 and the lower screen 26) is supplied. It is arranged and configured to have a downward slope over the discharged material discharge port 32.

  In the vibrating screen 22 having such a basic configuration, the crushed sand raw material is supplied to the upper screen 24, and the sieving screen (the upper screen 24 and the lower screen 26) or the entire vibrating screen 22 is vibrated. The crushed sand material supplied from the port 30 moves toward the material discharge port 32 while jumping on the upper screen 24 or the lower screen 26. Here, when the size of the crushed sand raw material particles is such that it can pass through the upper screen 24, the crushed sand raw material passes through the upper screen 24 and moves to the lower screen 26 side. If the crushed sand raw material that has moved onto the lower screen 26 is large enough to pass through the lower screen 26, it also passes through the lower screen 26 and is discharged from the product outlet 34.

[Tapping raw material supply means]
In the crushed sand manufacturing apparatus 10 according to the present embodiment, a part of the crushed sand raw material is used as the tapping member 60 that prevents clogging of the sieving screen. For this reason, a tapping raw material supply means 36 for supplying the crushed sand raw material as the tapping member 60 to the vibrating sieve 22 is provided.

  The tapping raw material supply means 36 may be composed of, for example, a tapping raw material hopper 38, a vibration feeder 40, and a belt conveyor 42. When the tapping raw material supply means 36 has such a configuration, the tapping member 60 supplied to the tapping raw material hopper 38 is leveled by the vibration feeder 40 and supplied from the belt conveyor 42 to the vibration sieve machine 22.

  Here, the supply of the tapping member 60 to the vibrating sieve 22 is preferably performed in addition to the supply port 30 and also to the lower supply port 30a. The tapping member 60 does not pass through the upper screen 24 because of its particle size. For this reason, in order to eliminate clogging of the lower screen 26, it is necessary to supply the tapping member 60 directly to the product passage 28 on the lower screen 26 side. Here, since the tapping member 60 using the crushed sand raw material is heavier than a tapping member made of a resin such as rubber, the collision force against the screens 24 and 26 during vibration is increased. Therefore, the clogging elimination effect of the screens 24 and 26 can be improved.

[Tapping member]
As the tapping member 60, for example, the particle size is about 30 mm to 50 mm as an average value of the solid particle diameter. The means for selecting and selecting the tapping member 60 used in the embodiment is not particularly limited. For example, it may be a manual operation by an operator, or mechanical sieving may be performed by a screen having a large opening.

[Selection of tapping member]
In the present embodiment, as shown in FIG. 3, the tapping member sieving screens 44 and 46 are arranged on the vibration feeder 14 so that the tapping member 60 is sieved. Specifically, similarly to the vibration sieve 22, an upper tapping member sieving screen 44 and a lower tapping member sieving screen 46 are arranged. The tapping member sieving screen 44 arranged on the upper side may be a screen having an opening of about 50 mm, and the tapping member sieving screen 46 arranged on the lower side may be a screen having an opening of about 30 mm. . Then, the crushed sand raw material remaining between the tapping member sieving screen 44 and the tapping member sieving screen 46 is conveyed to the tapping raw material hopper 38 as a tapping member 60.

  In the crushed sand manufacturing apparatus 10 having such a configuration, since a part of the crushed sand raw material is used as the tapping member 60 for preventing clogging of the sieving screen of the vibration sieving machine 22, the crushed sand is passed through the product or the screen. Thus, a measure for preventing mixing in the return line 48 retransmitted to the machine 18 becomes unnecessary. Further, the tapping member 60, which is a crushed sand material, has a higher specific gravity than a tapping member made of a resin such as rubber, and therefore has a greater impact force on the sieve mesh that is generated when vibration is applied. For this reason, the peeling effect of the powder etc. which adhered to the sieve net is high, and it becomes advantageous for clogging prevention.

  Further, since the tapping member 60 can be discharged from the raw material discharge port 32 together with the crushed sand raw material, no wiring or partition plate for fastening the tapping member 60 is required. Thereby, weight reduction of an apparatus and improvement of maintainability can be aimed at.

[Second Embodiment]
Next, 2nd Embodiment which concerns on the crushed sand manufacturing apparatus of this invention and an operating method is described with reference to FIG.

  Most of the configuration of the crushed sand production apparatus 10A of the present embodiment is the same as that of the crushed sand production apparatus 10 according to the first embodiment described above. The difference is that a sieving means 50 and a return path 52 are provided in the return line 48 of the crushed sand raw material including the tapping member 60 discharged from the raw material discharge port 32.

  The sieving means 50 is a means for sieving the crushed sand raw material having a particle size suitable for the tapping member 60 from the crushed sand raw material discharged from the raw material discharge port 32. The return path 52 is a path for returning the crushed sand material having a particle size suitable for the tapping member 60 sieved by the sieving means 50 to the tapping material hopper 38.

  In the crushed sand manufacturing apparatus 10 according to the first embodiment, all of the crushed sand raw material discharged from the raw material discharge port 32 has been sent to the crusher 18 via the return line 48. On the other hand, the tapping member 60 can be reused by arranging the sieving means 50 in the return line 48 and extracting the crushed sand material having a particle size suitable for the tapping member 60.

  In the said embodiment, although it describes so that the crushing of the stone in a quarry may be imaged mainly, the crushed sand manufacturing apparatus which concerns on this invention, and the operating method are the chemical factories which crush a crystal substance and manufacture a granular material It can also be applied.

  Moreover, in the said embodiment, what has two screens for sieving, such as the upper stage screen 24 and the lower stage screen 26, was described as the vibration sieving machine 22, However, in implementing this invention, the sieving of the vibration sieving machine 22 is described. The difference in the number of screens has no effect.

  Further, when the crushed sand raw material that passes through the screen 24 and does not pass through the screen 26 is recovered as a product, the tapping member 60 may not be supplied to the screen 26 via the belt conveyor 42.

DESCRIPTION OF SYMBOLS 10 ......... Crushing sand manufacturing apparatus, 12 ......... Raw material hopper, 14 ......... Vibration feeder, 16 ......... Belt conveyor, 18 ......... Fracture machine, 20 ......... Belt conveyor, 22 ......... Vibration sieve 24 ......... Upper screen, 26 ......... Lower screen, 28 ......... Product passage, 30 ......... Supply port, 30a ......... Lower feed port, 32 ......... Raw material outlet, 34 ......... Product Discharge port, 36 ......... tapping material supply means, 38 ......... tapping material hopper, 40 ...... vibrating feeder, 42 ......... belt conveyor, 44, 46 ......... tapping member sieving screen, 48 ......... Return line, 50 ... sieving means, 52 ... Return path, 60 ... Tapping member.

Claims (6)

A crushed sand production apparatus comprising a raw material supply means for storing crushed sand raw material, a crushing means for crushing the crushed sand raw material supplied from the raw material supply means, and a vibrating screen having a sieving screen,
The vibratory sieving machine includes tapping raw material supply means for directly supplying, as a tapping member, a crushed sand raw material larger than the opening of the sieving screen selected from the crushed sand raw material stored in the raw material supply means. An apparatus for producing crushed sand, characterized in that The sieving screen provided in the vibrating sieve machine is composed of an upper screen and a lower screen that has finer mesh than the upper screen and has an opening corresponding to the desired particle size of the crushed sand,
The crushed sand manufacturing apparatus according to claim 1, wherein a supply path from the tapping raw material supply means is provided so that the tapping member is supplied to both the upper screen and the lower screen. In the path for discharging the raw material that has not passed through the sieving screen in the vibration sieving machine, a sieving means for sieving the raw material having a particle size determined as a particle size suitable for the tapping member;
The crushed sand manufacturing apparatus according to claim 1, further comprising a return path that returns the sieved raw material to the tapping raw material supply unit. A method for operating a crushed sand production apparatus, comprising: a raw material supply means for storing crushed sand raw material; a crushing means for crushing the crushed sand raw material supplied from the raw material supply means; and a vibrating screen having a sieving screen. ,
A method for operating a crushed sand production apparatus, wherein a crushed sand raw material larger than the opening of the sieving screen is directly supplied to the sieving screen as a tapping member. When the sieving screen is composed of a coarse upper screen and a fine lower screen,
The operating method of the crushed sand manufacturing apparatus according to claim 4, wherein the tapping member is supplied to both the upper screen and the lower screen.   The raw material having a particle size determined as a particle size suitable for the tapping member is sieved from the raw materials that have not passed through the sieving screen and reused as the tapping member. Item 6. The operating method of the crushed sand production apparatus according to Item 4 or 5.