Diffusion apparatus, diffusion method, and production apparatus

Abstract

To provide a diffusion apparatus capable of cracking a material to be treated and capable of diffusing and supplying the cracked material to a classifier, for example, a vibration sieve.SOLUTION: The diffusion device of the present invention includes the diffusion part 50 and the sidewall 42 covering the periphery of the diffusion part 50, the diffusion part 50 includes the rotary shaft 51 rotated by the drive source, the first rotary body 52 rotated by the rotary shaft 51, and the second rotary body 53 rotated by the rotary shaft 51, the first rotary body 52 is provided with a plurality of blade DR1 parts extending in the radial 52A part, and the second rotary body 53 is provided with a plurality of protrusion DR2 parts at intervals in the circumferential 53B part. The first rotary body 52 is provided above the second rotary body 53 in the vertical direction V.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a diffusion device, a diffusion method, and a production apparatus for diffusing a material to be treated that is supplied. [Background technology]

[0002] A crushed sand production device is known that includes a crusher that applies a compressive force to crush raw material crushed stone or other processed material, a vibrating sieve that classifies the crushed material crushed by the crusher, and a return path that allows the crushed material that does not pass through the mesh of the vibrating sieve to be further crushed by the crusher.

[0003] When the crushed material is supplied to a vibrating sieve that classifies the crushed material, if the crushed material is supplied unevenly to a specific position on the mesh of the vibrating sieve, the layer of crushed material will become thicker on the upper side of the mesh, and it will take a long time for the crushed material to pass through the mesh. Therefore, in order to improve the amount of material passing through per unit time, it is preferable to supply the crushed material while spreading it over the entire surface of the vibrating sieve mesh.

[0004] The crushed material produced by the crusher of such crushed sand production equipment may include not only crushed sand that meets the product specifications, but also cake-like material, which is crushed material of various sizes that has been compressed into agglomerates. The cake-like material includes some that, if broken down into dust and crushed sand, would meet the product specifications and pass through a vibrating sieve. However, even if the cake-like material is dispersed and fed to the vibrating sieve, it will not pass through the vibrating sieve's mesh, reducing the classification efficiency of the vibrating sieve. This cake-like material does not pass through the vibrating sieve's mesh and is returned to the crusher via the return path. This cake-like material contains crushed sand of a particle size that does not need to be crushed by the crusher. Crushing the cake-like material not only breaks down the crushed sand into smaller particles, increasing dust, but also extending the crusher's total processing time, thereby reducing productivity. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Publication No. 63-107782 Summary of the Invention [Problem to be solved by the invention]

[0006] Patent Document 1 discloses a rotating diffuser for input material, which includes a diffuser plate at the lower end of a shaft, four anti-wear liners between the diffuser plate and the shaft, a cross-shaped metal plate extending radially from the center of the shaft to scatter input material, and a material input chute for inputting the material onto the diffuser plate. In other words, by using the rotating diffuser plate for input material in Patent Document 1, it is possible to diffuse the material to be supplied to a classifier in a crushed sand production device. However, Patent Document 1 does not mention crushing the material to be processed.

[0007] In view of the above, an object of the present invention is to provide a diffusion device that can crush a material to be treated and diffuse and supply the material to a classifier, for example, a vibrating sieve. [Means for solving the problem]

[0008] The diffusion device of the present invention comprises: a diffusion section; a side wall that covers the periphery of the diffusion section, The diffusion section is a rotation shaft that is rotated by a drive source; a first rotating body that is rotated by a rotation shaft; a second rotating body that is rotated by the rotation shaft, The first rotating body has a plurality of radially extending vanes are provided; The second rotating body has A plurality of protrusions are provided at intervals in the circumferential direction, The first rotating body is provided vertically above the second rotating body.

[0009] The diffusion device of the present invention comprises: It is preferable that a plurality of diffusing sections are provided, and the rotation axes of the plurality of diffusing sections are parallel to the vertical direction.

[0010] The diffusion device of the present invention comprises: The first rotor of each of the plurality of diffusion units is are arranged at different positions in the vertical direction, When viewed in a plan view, the rotation loci of the first rotors of the plurality of diffusion units overlap with each other, The second rotor of each of the plurality of diffusion sections is are arranged at different positions in the vertical direction, It is preferable that the rotation loci of the second rotors of the plurality of diffusion sections overlap each other in plan view.

[0011] The diffusion device of the present invention comprises: The first rotor is provided with a guide extending from the blade to one side in the circumferential direction, Preferably, the guide is spaced apart from the adjacent vane on one side of the vane.

[0012] The production apparatus of the present invention comprises: a crusher for crushing the first processed material to obtain a second processed material; a diffusion device that diffuses and supplies a third processed material obtained by crushing the second processed material; a classifier that classifies the third processed material diffused and supplied by the diffusion device into a fourth processed material having a size greater than the first particle size d1 and a fifth processed material having a size equal to or smaller than the first particle size d1; and a return path for supplying the fourth processed material to the crusher.

[0013] The diffusion method of the present invention comprises: The second processed material is crushed in the course of falling to obtain a third processed material, and the third processed material is dispersed in the course of falling. [Effects of the Invention]

[0014] According to the present invention, a diffusion device can be provided that can crush a material to be treated and diffuse and supply the material to a classifier, for example, a vibrating sieve. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a diagram showing a production device according to a first embodiment of the present invention. [Figure 2] 1A and 1B are a front perspective view of the interior of a diffusion device according to an embodiment of the present invention and a plan view of a first rotating body and a second rotating body. [Figure 3] 2A and 2B are a perspective view of the inside of a diffusion device according to an embodiment of the present invention as seen from the side and a plan view of a first rotor as seen from the direction of an arrow (bb) in FIG. [Figure 4] 1A and 1B are diagrams illustrating disintegration and diffusion of a diffusion device according to an embodiment of the present invention. [Figure 5] 1A and 1B are diagrams illustrating disintegration and diffusion of a diffusion device according to an embodiment of the present invention. [Figure 6] FIG. 4 is a diagram showing a diffusion device according to a second embodiment of the present invention. [Figure 7] FIG. 10 is a diagram showing a diffusion device according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The present embodiment includes at least a first embodiment, a second embodiment, and a third embodiment. In the following, the first embodiment will be described, followed by the second and third embodiments. <First embodiment: see Figs. 1-5> The production apparatus 1 of this embodiment produces, as an example, crushed sand for concrete as granular material. The diffusion device 30A included in this production apparatus 1 can crush the material to be treated and can diffuse and supply the crushed material to a classifier, for example, a vibrating screen.

[0017] [Production equipment 1: See Figure 1] 1, the production apparatus 1 includes a double roll crusher 10 as a crusher that crushes raw crushed stone RM as a first processed material, and a belt conveyor 20 that transports a crushed material CM as a second processed material obtained by crushing the raw crushed stone RM with the double roll crusher 10 to a diffusion device 30A. The production apparatus 1 also includes a diffusion device 30A that crushes the crushed material CM and diffuses and supplies it to a vibrating sieve 60 as a classifier, and a vibrating sieve 60 that classifies a crushed material DM as a third processed material that is crushed by the diffusion device 30A and supplied.

[0018] The production apparatus 1 also includes a collection area PA1 that collects crushed sand CS1 and dust PW1 as the fifth processed material that passes through the mesh 62 of the vibrating sieve 60. The production apparatus 1 also includes a collection path 72 that transports the crushed sand CS1 classified by the vibrating sieve 60 to the collection area PA1, and a return path 71 that transports large-diameter processed material CS2 as the fourth processed material that does not pass through the mesh 62 of the vibrating sieve 60 to the double roll crusher 10. In FIG. 1, arrows between the devices indicate the direction in which the processed material flows. In FIG. 1, the horizontal direction H and the vertical direction V are defined as shown.

[0019] [Double Roll Crusher 10: See Figure 1] The double roll crusher 10 applies a compressive force to the raw material crushed stone RM supplied from, for example, a silo (not shown), thereby crushing the raw material crushed stone RM and producing crushed material CM. Crushing refers to crushing the raw material crushed stone RM to make it smaller than the size of the raw material crushed stone RM when it is supplied to the double roll crusher 10. As shown in Figure 1, the double roll crusher 10 comprises a casing 11 with a crushed stone inlet 12, the crushed stone inlet 12 through which raw crushed stone RM is introduced from a silo, a first roll 13 and a second roll 14 provided inside the casing 11, and a discharge outlet 15 through which the crushed material CM produced by crushing by the first roll 13 and the second roll 14 is discharged.

[0020] The casing 11 receives raw crushed stone RM supplied from a silo at a crushed stone inlet 12, and discharges crushed material CM obtained by crushing the raw crushed stone RM from a discharge outlet 15 onto a belt conveyor 20.

[0021] The adjacent first roll 13 and second roll 14 are arranged so that their rotation axes are parallel, and the first roll 13 and the second roll 14 are each connected to a drive source, such as an electric motor (not shown), so that each can rotate at a predetermined rotation speed.

[0022] The first roll 13 and the second roll 14 are provided with a drive source that adjusts the minimum distance between them and applies a force to move at least one of them toward the other. For example, the drive source presses the second roll 14 toward the first roll 13, thereby generating a crushing force that crushes the raw crushed stone RM passing between the first roll 13 and the second roll 14. The raw crushed stone RM supplied to the double roll crusher 10 is crushed by the compressive force from the first roll 13 and the second roll 14 when passing between the first roll 13 and the second roll 14. The distance between the first roll 13 and the second roll 14, which is adjusted by the drive source, is adjusted, for example, based on the particle size of the raw crushed stone RM supplied to the double roll crusher 10. A hydraulic cylinder, for example, is used as this drive source.

[0023] Here, the crushed material CM obtained by crushing the raw crushed stone RM is divided into crushed sand CS1 that passes through the mesh 62 of the vibrating sieve 60, and large-diameter processed material CS2 that does not pass through the mesh 62 of the vibrating sieve 60. This large-diameter processed material CS2 is divided into crushed sand CS3 and cake C. Crushed sand CS3 has a particle size that does not pass through the mesh 62 even when used alone, and cake C is a mass of crushed sand CS1, crushed sand CS3, and dust PW1 that has been compressed.

[0024] Crushed sand CS1, crushed sand CS3, and dust PW1 are produced by crushing raw material crushed stone RM while it passes between the first roll 13 and the second roll 14. Cake C is produced when the crushed sand CS1, crushed sand CS3, and dust PW1 produced by crushing the raw material crushed stone RM are compressed into lumps by the compressive force applied by the first roll 13 and the second roll 14. Cake C is supplied to the belt conveyor 20 while maintaining its shape.

[0025] [Belt conveyor 20: See Figure 1] The belt conveyor 20 is supplied with the materials to be crushed CM and transports the materials to be crushed CM to the diffusion device 30A. As shown in Fig. 1, the belt conveyor 20 includes an endless conveyor belt 21 that carries the crushed material CM, including cakes C, and transports it to the diffusion device 30A, and a drive pulley 22 and a driven pulley 23 around which the conveyor belt 21 is wound. A drive source, such as an electric motor (not shown), is connected to the drive pulley 22. The drive pulley 22 is continuously rotated by the electric motor from the start of operation to the stop of operation of the production device 1. The rotational drive force of the electric motor is transmitted from the drive pulley 22 to cause the conveyor belt 21 to run.

[0026] When the crushed material CM is placed on the conveyor belt 21, some of the cakes C may be crushed due to the impact, but the remaining cakes C are transported by the conveyor belt 21 to the diffusion device 30A while maintaining the shape they had before being transferred.

[0027] [Diffusion device 30A: see Figures 1 and 2] The diffusion device 30A can disintegrate the crushed material CM while diffusing and supplying the crushed material DM to the vibrating sieve 60. Note that crushing refers to applying an impact to cakes C contained in the crushed material CM to break up the aggregated form. 1, the diffusion device 30A includes a casing 40 that covers the periphery of the diffusion section 50, and a plurality of diffusion sections 50 that disintegrate the crushed material CM supplied to the casing 40 while diffusing and supplying the crushed material DM to the vibrating sieve 60. The plurality of diffusion sections 50 consists of two diffusion sections 50: a first diffusion section 50A and a second diffusion section 50B. The second diffusion section 50B is disposed lower in the vertical direction V than the first diffusion section 50A.

[0028] [Casing 40: See Figures 1 and 2] 1, the casing 40 includes an inlet 41 through which the shredded material CM is introduced, a side wall 42 that covers the horizontal direction around the diffusion section 50, and a discharge outlet 43 that discharges the shredded material DM obtained by shredding the shredded material CM by the diffusion section 50. The inlet 41 supplies the shredded material CM introduced from above in the vertical direction V to the inside surrounded by the side wall 42.

[0029] As shown in Figure 2(a), the side wall 42 is made up of two layers, and includes a liner 42A provided on the inside against which the material to be crushed CM collides when the material to be crushed CM is crushed by the diffusion section 50, and a cylindrical outer wall 42B that detachably holds the liner 42A from the outside. The liner 42A is made of, for example, wear-resistant steel with a hard surface, in order to crush the cakes C in particular when the material to be crushed CM collides with it. The liner 42A, which is worn down by collisions with the material to be crushed CM, is replaced periodically.

[0030] The discharge port 43 discharges crushed material DM obtained by crushing crushed material CM supplied to the inside of the side wall 42 by the diffusion section 50. The crushed material DM is discharged from the discharge port 43 while being diffused around the rotation axis 51 of the diffusion section 50.

[0031] [Diffusion section 50: see Figures 2, 3, and 4] 2(a), the diffusion section 50 includes a rotating shaft 51 rotated by a drive source such as an electric motor (not shown), a first rotating body 52 rotated by the rotating shaft 51, and a second rotating body 53 rotated by the rotating shaft 51 together with the first rotating body 52. ​​In this embodiment, the second rotating body 53 is provided at the lower end of the rotating shaft 51, and the first rotating body 52 is provided on the rotating shaft 51 above the second rotating body 53 in the vertical direction V, i.e., on the side of the inlet 41. The rotating shaft 51 is continuously rotated by the electric motor from the start to the stop of operation of the production apparatus 1.

[0032] The first rotor 52 has a function of crushing the material to be crushed CM. The method of crushing the material to be crushed CM will be described later. 2(b), the first rotor 52 is provided with a plurality of blades 52A extending in a radial direction DR1 around the rotation shaft 51. In other words, the plurality of blades 52A are provided on the rotation shaft 51 in the radial direction around the rotation shaft 51.

[0033] Furthermore, the blades 52A are provided with guides 52B extending from the lower ends of the blades 52A to one side in the circumferential direction DR2. In the circumferential direction DR2, a gap is provided between the blades 52A adjacent to one side of the blades 52A on which the guides 52B are provided and the guides 52B. In other words, the guides 52B are not connected to the blades 52A adjacent to one side of the blades 52A on which the guides 52B are provided. The first rotors 52 of the first diffusion unit 50A are positioned higher in the vertical direction V than the first rotors 52 of the second diffusion unit 50B.

[0034] The second rotor 53 has a function of diffusing the crushed material DM obtained by crushing the crushed material CM by the first rotor 52. The method of diffusing the crushed material DM will be described later. As shown in FIG. 2(c), the second rotor 53 includes a circular disk 53A centered on the rotation axis 51 and multiple protrusions 53B provided on the outer periphery of the disk 53A at intervals in the circumferential direction DR2 around the rotation axis 51. The space between adjacent protrusions 53B is referred to as an open region 53C. The protrusions 53B extend upward in the vertical direction V, that is, toward the inlet 41. The second rotor 53 of the first diffusion unit 50A is positioned higher in the vertical direction V than the second rotor 53 of the second diffusion unit 50B.

[0035] 3(b), when the first rotors 52 of the first diffusion section 50A and the second diffusion section 50B are viewed in a plan view, the first rotors 52 are arranged so that they partially overlap each other. In other words, when viewed in a plan view, the rotation trajectories of the first rotors 52 overlap each other. By arranging the first rotors 52 so that they overlap each other in this way, some of the material CM to be crushed does not collide with the first rotor 52 of the upper first diffusion section 50A, and even if the material CM passes through the first rotor 52, it can collide with the first rotor 52 of the lower second diffusion section 50B.

[0036] Similarly, when the second rotors 53 of the first diffusion section 50A and the second diffusion section 50B are viewed from above, the second rotors 53 are arranged so that they partially overlap. In other words, when viewed from above, the rotation trajectories of the second rotors 53 overlap. By arranging the second rotors 53 so that they overlap in this way, even if there is a crushed material DM that cannot be placed on the second rotor 53 of the upper first diffusion section 50A, the crushed material DM can be placed on the second rotor 53 of the lower second diffusion section 50B, and the crushed material DM can be diffused.

[0037] [Vibrating sieve 60: See Figure 1] The vibrating sieve 60 classifies the disintegrated material DM that is diffused and supplied from the diffusion device 30A. As shown in Figure 1, the vibrating sieve 60 classifies the crushed material DM diffused and supplied from the diffusion device 30A using the first particle size d1 as a boundary, and separates it into crushed sand CS1 and dust PW1 having sizes equal to or smaller than the first particle size d1, and crushed sand CS3 having sizes larger than the first particle size d1.

[0038] The vibrating sieve 60 includes a casing 61 and a mesh 62 provided inside the casing 61. The casing 61 includes an inlet 63 through which the crushed material DM diffused and supplied from the diffusion device 30A is introduced, a first outlet 64 through which crushed sand CS1 and dust PW1 are discharged, and a second outlet 65 through which crushed sand CS3 is discharged. The mesh 62 is provided over the entire opening of the casing 61 when the casing 61 is viewed from above. In this embodiment, the mesh 62 is provided at an angle relative to the horizontal direction H, but this is not limiting and the mesh 62 may be provided in the horizontal direction H. The vibrating sieve 60 is vibrated by a vibration source (not shown).

[0039] In this embodiment, the mesh 62 has, as an example, a nominal sieve size of 5 mm as defined in JIS A 5005. The crushed sand CS1 and dust PW1 that pass through the mesh 62 with a nominal sieve size of 5 mm meet the crushed sand particle size standard in JIS A 5005. The crushed material DM is diffused and supplied from the diffusion device 30A and supplied to the upper side of the mesh 62, and as the vibrating sieve 60 vibrates, it is classified into crushed sand CS1 and dust PW1 that pass through the mesh 62 downward in the vertical direction V, and crushed sand CS3 that remains above the mesh 62 without passing through it.

[0040] The crushed sand CS1 and dust PW1 that pass through the mesh 62 are discharged from a first discharge port 64 located at the bottom of the casing 61 and collected in a collection area PA1 via a collection path 72. The large-diameter material CS2 to be treated, including the crushed sand CS3, rolls above the mesh 62, which is inclined with respect to the horizontal direction H, by vibrating the casing 61 with a vibration source (not shown), and is discharged from a second discharge port 65 located above the mesh 62. The large-diameter material CS2 discharged from the second discharge port 65 is transported via a return path 71 connected to the crushed stone inlet 12 of the double roll crusher 10, and is fed back into the double roll crusher 10.

[0041] [Disintegration of the crushed material CM by the first rotor 52: see Figures 4 and 5] Two crushing methods for crushing the cakes C contained in the crushed material CM using the first rotor 52 will be described.

[0042] [First crushing method] The first crushing method is a crushing method in which cakes C of the crushed material CM are crushed by impact FA that strikes the cakes C while they are falling. As shown in FIG. 4, the cake C falling from above is struck by the blades 52A of the first rotor 52 as it rotates.

[0043] 5(a), the cake C is struck by a side surface 52AA of a blade 52A rotating counterclockwise on the paper around a rotation axis 51 (positions P11, P12, P13, P14). The cake C is broken down into crushed sand CS1, crushed sand CS3, and dust PW1 by an impact FA caused by the striking by the blade 52A.

[0044] [Second crushing method] The second crushing method is a crushing method in which the cakes C are collided with the liner 42A of the side wall 42 surrounding the periphery of the diffusion section 50, and the cakes C are crushed by the impact FC caused by the collision with the liner 42A. As shown in FIG. 5(a), cakes C falling from above are loaded onto guides 52B of blades 52A, which rotate counterclockwise on the paper around rotation axis 51 (position P15). Centrifugal force FB generated by the rotation of first rotor 52 causes cakes C to move outward in the radial direction DR1 along blades 52A (position P16). Cakes C that have moved to tips 52BA of guides 52B are thrown toward liner 42A (position P17). As shown in FIG. 4, cakes C thrown toward liner 42A are crushed into crushed sand CS1, crushed sand CS3, and dust PW1 by impact FC upon collision with liner 42A.

[0045] Additionally, cakes C are struck by side surfaces 52AA of blades 52A that rotate around rotation shaft 51, causing them to be thrown toward liner 42A. As shown in Fig. 4, cakes C thrown toward liner 42A are broken down into crushed sand CS1, crushed sand CS3, and dust PW1 by impact FC upon collision with liner 42A in addition to impact FA upon being struck by side surfaces 52AA. Even if the crushed material CM is subjected to crushing by the first crushing method and the second crushing method, the crushed material DM may still contain cakes C that maintain their shape.

[0046] For example, if the liner 42A is positioned farther away than the distance at which the cakes C are thrown in the radial direction DR1 of the first rotor 52, the cakes C will not be able to collide with the liner 42A, resulting in insufficient crushing of the cakes C. If the cakes C do not collide with the liner 42A, they will be crushed only by the impact of their free fall onto the vibrating sieve 60. Furthermore, if a soft material such as rubber is used for the liner 42A, the impact FC on the cakes C will be weakened, resulting in insufficient crushing of the cakes C. In other words, the harder the surface of the liner 42A is and the closer the distance between the liner 42A and the first rotor 52 is, the more improved the crushing ability can be.

[0047] [Diffusion method using the second rotor 53: see Figure 4] The following describes a diffusion method for diffusing the crushed material DM while it is falling using the second rotor 53. The crushed material DM, which is obtained by crushing cake C into crushed sand CS1, crushed sand CS3, and dust PW1 using the first rotor 52 located above the second rotor 53, is diffused and supplied to the vibrating sieve 60 by the second rotor 53.

[0048] 5(b), the second rotor 53, which rotates counterclockwise on the page around the rotation axis 51, loads onto a disk 53A the crushed material DM that has been crushed into crushed sand CS1, crushed sand CS3, and dust PW1 by the first rotor 52. The crushed material DM loaded onto the disk 53A moves outward in the radial direction DR1 due to the centrifugal force FB generated by the rotation of the second rotor 53.

[0049] The material DM to be crushed moves outward in the radial direction DR1 (position P21) and reaches the inner surface 53Bi of the protrusion 53B provided on the outer peripheral edge of the disk 53A, where it is pressed against the inner surface 53Bi by the centrifugal force FB (position P22). While being pressed against the inner surface 53Bi, the material DM to be crushed shifts in the circumferential direction DR2 (position P23) and reaches the open region 53C, where it passes through the open region 53C (position P24) and falls while being thrown outward in the radial direction DR1.

[0050] A portion of the material DM to be crushed that has moved outward in the radial direction DR1 passes through the open area 53C without hitting the protrusions 53B (positions P25, P26, P27), and falls while being thrown outward in the radial direction DR1. At this time, if a centrifugal force FB sufficient to allow the material DM to reach the liner 42A before it falls and passes through the discharge port 43 is generated, the material DM will collide with the liner 42A. The impact of the collision with the liner 42A can crush the cakes C contained in the material DM to be crushed. The second rotor 53 continues to rotate while the production apparatus 1 is in operation, and therefore the disintegrated material DM is diffused around the second rotor 53 while the production apparatus 1 is in operation. The dispersed and supplied disintegrated material DM is classified while flowing toward the lower right as indicated by arrow F on the vibrating sieve 60 in Fig. 1. The disintegrated material DM flows toward arrow F from the position where it falls onto the mesh 62 of the vibrating sieve 60, and therefore the dispersed and supplied disintegrated material DM can be classified without forming a thick layer above the mesh 62.

[0051] [effect] The diffusion device 30A according to this embodiment described above has the following advantages. [First effect] Diffusion device 30A includes a diffusion section 50 and a sidewall 42 that surrounds the diffusion section 50. Diffusion section 50 includes a rotary shaft 51 that is rotated by a drive source, and a first rotor 52 and a second rotor 53 that are rotated by the rotary shaft 51. The first rotor 52 is provided with a plurality of blades 52A that extend in a radial direction DR1, and the second rotor 53 has a disk 53A on which a plurality of protrusions 53B are provided at intervals in a circumferential direction DR2. The first rotor 52 is provided above the second rotor 53 in the vertical direction V. The diffusion device 30A can disintegrate the crushed material CM while diffusing and supplying the crushed material DM to the vibrating sieve 60. Because the crushed material DM is supplied in a diffused manner, it can pass through the mesh 62 efficiently without being concentrated at a specific position on the mesh 62, and the amount of crushed material DM passing through per unit time can be improved.

[0052] Since the crushed sand CS1 contained in the cake C cannot pass through the mesh 62, it is fed again into the double roll crusher 10 via the return path 71. Although the crushed sand CS1 has already reached a particle size that can pass through the mesh 62, the crushed sand CS1 is repeatedly crushed in the form of cake C by the double roll crusher 10, and the amount of excess dust PW1 produced increases. However, the crushing function of the diffusion device 30A crushes the cake C into the respective particle sizes of crushed sand CS1, crushed sand CS3, and dust PW1, so that the crushed sand CS1 and dust PW1, which are no longer in the form of cake C, can pass through the mesh 62. The crushed sand CS1 that was contained in the cake C before it was crushed can pass through the mesh 62 after the cake C is crushed, so it is not repeatedly crushed by the double roll crusher 10. Therefore, by including the diffusion device 30A, the production apparatus 1 can prevent the production of excess dust PW1.

[0053] In addition, since the amount of cake C contained in the large-diameter processing material CS2 transported by the return path 71 is reduced, the total amount of processing material fed into the double roll crusher 10 is reduced, thereby shortening the operating time of the device and reducing the amount of electricity consumed per unit amount of crushed sand produced.

[0054] [Second effect] The diffusion device 30A includes multiple diffusion sections 50. The multiple diffusion sections 50 include a first diffusion section 50A and a second diffusion section 50B. The first diffusion section 50A is disposed at a higher position in the vertical direction V than the second diffusion section 50B, and the rotation trajectories of the first rotors 52 of the first diffusion sections 50A and 50B overlap in a plan view. By using such a diffusion device 30A, the crushed material CM is crushed using multiple stages of first rotors 52, thereby reducing the amount of uncrushed material passing through the diffusion device 30A without being crushed.

[0055] In addition to the above, the configurations given in the above embodiments can be selected or changed as appropriate to other configurations without departing from the spirit of the present invention.

[0056] [Second embodiment: see FIG. 6] In the diffusion device 30A according to the first embodiment, the first diffusion section 50A and the second diffusion section 50B are disposed at different heights in the vertical direction V, but the present invention is not limited to this. In the diffusion device 30B according to the second embodiment, the first diffusion section 50A and the second diffusion section 50B may be disposed at the same height in the vertical direction V, as shown in Fig. 6. In Fig. 6, the same elements as in Fig. 1 are designated by the same reference numerals, and their description will be omitted.

[0057] [Diffusion device 30B: see Figure 6] 6, the diffusion device 30B includes a casing 40 that covers the periphery of the diffusion section 50, and a plurality of diffusion sections 50 that disintegrate the crushed material CM supplied to the casing 40 while diffusing and supplying the crushed material DM to the vibrating sieve 60. The plurality of diffusion sections 50 consists of two diffusion sections 50: a first diffusion section 50A and a second diffusion section 50B. The first diffusion section 50A and the second diffusion section 50B are arranged at the same position in the vertical direction V. In this embodiment as well, the first rotor 52 of the diffusion section 50 can disintegrate the crushed material CM, and the second rotor 53 can diffuse and supply the crushed material DM to the vibrating sieve 60.

[0058] The diffusion device 30B according to this embodiment also achieves the same first effect as the diffusion device 30A.

[0059] [Third embodiment: see FIG. 7] Although the diffusion device 30A according to the first embodiment includes multiple diffusion sections 50, the present invention is not limited to this. As shown in Fig. 7, the diffusion device 30C according to the third embodiment may include only one diffusion section 50. In Fig. 7, the same elements as those in the first embodiment are denoted by the same reference numerals as in Fig. 1, and their description will be omitted.

[0060] [Diffusion device 30C: see Figure 7] As shown in Figure 7, the diffusion device 30C comprises a casing 40 that covers the periphery of the diffusion section 50, and one diffusion section 50 that disintegrates the crushed material CM supplied to the casing 40 while diffusing and supplying the crushed material DM to the vibrating screen 60. In this embodiment as well, the first rotor 52 of the diffusion section 50 can disintegrate the crushed material CM, and the second rotor 53 can diffuse and supply the crushed material DM to the vibrating sieve 60.

[0061] The diffusion device 30C according to this embodiment also achieves the same first effect as the diffusion device 30A. [Explanation of symbols]

[0062] 1. Production equipment 10 Double Roll Crusher 11 Casing 12 Crushed stone inlet 13 Roll 1 14 Roll 2 15 Outlet 20 Conveyor Belt 21 Conveyor Belt 22 Drive pulley 23 Driven pulley 30A, 30B, 30C Diffuser 40 Casing 41 Inlet 42 Side wall 42A Liner 42B exterior wall 43 Outlet 50 Diffusion section 50A First diffusion section 50B Second diffusion section 51 Rotation axis 52 First Rotating Body 52A Feather 52AA side 52B Guide 52BA tip 53 Second Rotating Body 53A Disc 53B Protrusion 53Bi inner surface 53C open area 60 vibrating sieve 61 Casing 62 mesh 63 Inlet 64 1st outlet 65 2nd outlet 71 Return Route 72 Recovery Route C Cake CM crushed material CS1 crushed sand CS2 Large diameter processing object CS3 crushed sand d1 1st particle size DM crushed material DR1 Radial DR2 Circumferential direction F arrow FA shock FB centrifugal force FC Impact PA1 Recovery Area PW1 Dust RM raw crushed stone

Claims

1. a diffusion section; a side wall that covers the periphery of the diffusion section, The diffusion section is a rotation shaft rotated by a drive source; a first rotating body that is rotated by the rotation shaft; a second rotating body that is rotated by the rotation shaft, The first rotor has: a plurality of radially extending vanes are provided; The second rotating body has A plurality of protrusions are provided at intervals in the circumferential direction, The first rotating body is provided vertically above the second rotating body. Diffusion device.

2. a plurality of the diffusion portions; The rotation axes of the plurality of diffusion units are parallel to the vertical direction. The diffusion device of claim 1 .

3. The first rotor of each of the plurality of diffusion sections is are disposed at different positions in the vertical direction, When viewed in a plan view, the rotation loci of the first rotors of the plurality of diffusion sections overlap with each other, The second rotor of each of the plurality of diffusion sections is are disposed at different positions in the vertical direction, When viewed in a plan view, the rotation loci of the second rotors of the plurality of diffusion sections overlap with each other. The diffusion device of claim 2 .

4. The first rotor is provided with a guide extending from the blade to one side in the circumferential direction, The guide is spaced apart from the adjacent blade on the one side of the blade.

4. A diffusion device according to any one of claims 1 to 3.

5. a crusher for crushing the first processed material to obtain a second processed material; a diffusion device according to claim 1 that diffuses and supplies a third processed material obtained by crushing the second processed material; a classifier that classifies the third processed material diffused and supplied by the diffusion device into a fourth processed material having a size exceeding the first particle size d1 and a fifth processed material having a size equal to or smaller than the first particle size d1; A return path for supplying the fourth processed material to the crusher. Production equipment.

6. obtaining a third processed material by crushing the second processed material in the course of falling, and diffusing the third processed material in the course of falling; Spreading method.

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