JPS6053657B2 - Vertical dry crusher - Google Patents

Description

[Detailed description of the invention] The present invention relates to a shaping dry crusher.

BACKGROUND ART A method of producing sand with a particle size of about 5 m and 77 liters by crushing large blocks of rock, for example, rocks with a particle size of about 200 to 300 W, has been attracting attention in recent years.

By the way, conventionally, as shown in Fig. 1, the above rock is crushed to a predetermined particle size by a primary crusher 1 consisting of a jaw crusher, and then crushed by a cone crusher, a secondary crusher 2, and an impact crusher. Equipment costs are high because sand is created through a step-by-step crushing process in which the sand is further crushed in the Ξ secondary crusher 3, and then crushed to a predetermined particle size in the quaternary crusher 4, which consists of a final rod mill. However, it requires a sieving machine and a conveyor as ancillary equipment, consumes a lot of power, has high running costs, and has drawbacks such as complicated maintenance.

In addition, since the quaternary crusher 4 is usually a wet operation type, pollution control measures such as wastewater treatment are required, and there is also a drawback that the installation area of the plant equipment becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a compact shaping dry crusher that eliminates the above-mentioned drawbacks and allows sand to be produced with a single machine.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 2 to 5, the inside of the casing 11 is divided into Ξ chambers by forming two partition plates 12 and 13, and from the top there is a primary crushing chamber 14, a sorting chamber A chamber 15 and a secondary crushing chamber 16, and each of the adjacent chambers is
They communicate with each other via holes 17 formed in the partition plates 12 and 13 between them.

A gear case 18 is fixed to the lower part of the casing 11.

A drive shaft 19 is rotatably supported by the gear case 18 , and when the drive shaft 19 is rotated by, for example, a motor, the rotation is transmitted to the main shaft 21 via the bevel gear 20 . The main shaft 21 extends vertically upward from the gear case 18, stands upright at the center of the secondary crushing chamber 16, the sorting chamber 15, and the primary crushing chamber 14, and is rotatably supported by a plurality of bearings 22.

A braking force 23 and a rotor 24 are fixed to a portion of the main shaft 21 passing through the primary crushing chamber 14 below the braking force 23, and a shaft portion 2 provided on the outer periphery of the breaker 22
A breaker piece 26 is attached to 5.

Further, the rotor 24 includes upper and lower flanges 27, 27, and a cylindrical grinder 29 is attached to each of a plurality of circumferentially arranged shafts 28 supported by the flanges 27, 27. A part of the outer periphery of the flange 27 projects outward from the outer periphery of the flange 27 . The inner periphery of the primary crushing chamber 14 is lined with thick liners 30 and thin liners 31 alternately in the circumferential direction of the crushing chamber 14 at positions corresponding to the breaker pieces 26 and positions corresponding to the grinder 29, respectively. The inner periphery is textured.

The sorting chamber 15 is provided with a sieve 32 that receives the crushed material falling naturally from the primary crushing chamber 14 and separates it into coarse particles and fine particles.

This sieving machine 32 consists of a tapered cylindrical screen 33 formed in a lower recess, an outer cylinder 34 connected to the lower end of this screen 33, and an inner cylinder 35 into which the inside of this outer cylinder 34 is inserted. The lower end of the outer cylinder 35 is formed into a tapered shape that widens downward, and this tapered portion is connected to a guide plate 36 made of fine sand.
It is said that Further, as shown in FIG. 5, the outer cylinder 34 and the inner cylinder 35 are connected by a plurality of ribs 37, and the interval between adjacent ribs 37 forms a passage 38 for guiding coarse sand.

The inner cylinder 35 connects to the eccentric shaft portion 40 of the main shaft 21 via a bearing 39.
When the main shaft 21 rotates, the sieving machine 32 vibrates in the horizontal direction.

Note that 41 is an outlet formed at the bottom of the sorting chamber 15.

A portion of the main shaft 21 that passes through the secondary crushing chamber 16 is an eccentric shaft portion 42, and a core 43 is rotatably supported by the eccentric shaft portion 42.

Therefore, if an external force is applied to the core 43, only the main shaft 21 rotates without rotating the core itself. The upper and lower portions of this core 43 form tapered surfaces 44 and 45 that slope toward the end surfaces. A cylindrical body 46 is fixed to the inner circumference of the secondary crushing chamber 16.
The lower inner periphery of this cylinder 46 becomes a tapered surface 47 parallel to the lower tapered surface 45 of the core 32, and communicates with a tapered passage 48 formed around the inner periphery of this tapered surface 47 to form a discharge port 49. is formed.

Note that 50 is a chute connected to the discharge port 49.

The present invention has the above structure, and when the drive shaft 19 is rotated by a motor or the like, the rotation is caused by the bevel gear 20.
is transmitted to the main shaft 21 via.

After rotating the main shaft 21 in this manner, large chunks of material to be crushed with a particle size of 200 to 30'' are fed to the primary crushing chamber 1-4 using a supply hopper, belt conveyor, feeder, etc.
The object to be crushed is subjected to impact crushing and shear crushing by the rotation of the breaker piece 26, and is further crushed again by the impact action caused by the revolution and rotation of the grinder 29. This primary crushed material falls naturally into the sorting chamber 15 from the hole 17 of the partition plate 12.

In the sorting chamber 15, the sieving machine 32 is vibrating in the horizontal direction due to the rotation of the eccentric shaft portion 40 of the main shaft 21.
The materials to be crushed that naturally fall from the screen 33 are sorted by the screen 33, and the fine sand passing through the screen 33 moves to the outer periphery of the sorting chamber 15 along the guide plate 36 and flows out from the discharge port 41.

Furthermore, the objects to be crushed that are caught by the screen 33 move to the center along the slope of the screen 33, fall naturally from the passage 38, and enter the secondary crushing chamber 16 through the hole 17 of the partition plate 13. run down.

In the secondary crushing chamber 16, since the core 43 moves eccentrically, the material to be crushed that has flowed into the secondary crushing chamber 16 is compressed by the core 43 and crushed into fine pieces as it moves downward through the passage. and becomes sand. This sand naturally falls from the discharge port 49 into the chute 50. In the embodiment, the sieving machine 32 provided in the sorting chamber 15 is vibrated in the horizontal direction, but it is also possible to vibrate in the vertical direction in addition to the horizontal movement.

Further, by eccentrically fixing the core to the main shaft, the core can be eccentrically rotated.

Furthermore, it is also possible to attach a plurality of cores to the main shaft and compress and crush each core. In addition, as the rock is crushed, the particle density increases, so by making the tapered passage between the core and the cylindrical body provided on the outside widen downward, it is possible to smoothly discharge the crushed materials. Can be done.

As described above, according to the present invention, the material to be crushed supplied to the primary crushing chamber is primarily crushed by impact and shear crushing by the breaker piece and impact crushing by the grinder, so that The material to be crushed can be crushed in large chunks, and the material to be crushed is separated into coarse sand and fine sand by a sieving machine, and the coarse sand is sent to the secondary crushing chamber to remove the eccentricity of the core. Since the secondary crushing is performed by compression crushing by motion, a large lump of the material to be crushed can be efficiently reduced to fine particles by one machine.

In addition, the primary crushed material is separated into coarse sand and fine sand using a sieve, and the fine sand is prevented from flowing into the secondary crushing chamber, which has a great effect on improving the crushing efficiency in the secondary crushing chamber. It is possible to obtain sand with a uniform particle size, and there is little scattering of dust, and dry operation is possible. Therefore, large-scale pollution prevention measures such as wastewater treatment are not required. Furthermore, since the material to be crushed moves by natural fall, there is no need for a conveyor such as a conveyor to move the material to be crushed, and the structure is small and compact with a sorting chamber between the upper and lower crushing chambers. Therefore, it is extremely advantageous for installation.

In addition, since the main shaft located in the center between the upper and lower crushing chambers drives the breaker piece, grinder, sieve machine, and core through rotational motion, a rolling bearing can be used for the bearing part of the main shaft. This is advantageous in terms of mechanical efficiency and lubrication compared to supporting the main shaft using a bearing or the like.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a conventional sand manufacturing method, FIG. 2 is a longitudinal sectional front view showing an embodiment of a vertical dry crusher according to the present invention, and FIG. Figure 4 is a cross-sectional view taken along line ■-■ in Figure 2, Figure 5 is a cross-sectional view taken along line ■1-■ in Figure 2, and Figure 6 is a cross-sectional view taken along line ■-■ in Figure 2. is the second
It is a sectional view taken along the line ■-■ in the figure. 14...Primary crushing room, 15...Sorting room, 1
6... Secondary crushing chamber, 26... Breaker piece, 29... Grainer, 32... Screening machine, 38... Passage , 43●● core.

Claims (1)

[Claims] 1. A crushing chamber equipped with a rotatable breaker piece in the upper part and a grinder in the lower part that can revolve and rotate;
A crushing chamber equipped with a core that moves eccentrically in the radial direction is arranged above and below, and between the two crushing chambers, the material to be crushed is sorted into fine sand and coarse sand, and the coarse sand is separated from the passage provided inside. A vertical dry type in which a sorting chamber equipped with a sieve that falls naturally into the lower crushing chamber is provided, and a breaker piece, a grinder sieve, and a main shaft for driving the core are arranged and rotatably supported in the center of both of the crushing chambers. Crushing machine.