JPS6053656B2 - Vertical dry crusher - Google Patents

Description

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

The method of producing sand with a particle size of about 5wrln by crushing a large rock, for example, a rock with a particle size of 200 to 300nrIn, is as follows:
It has been in the spotlight in recent years.

By the way, conventionally, as shown in FIG. 1, after the above rock is crushed into a predetermined particle size by a primary crusher 1 consisting of a jaw crusher, a secondary crusher 2 consisting of a cone crusher and an impact crusher are used. Since sand is created through a step-by-step crushing process in which the sand is further crushed in a tertiary crusher 3 consisting of a rod mill, and finally crushed to a predetermined particle size in a quaternary crusher 4 consisting of a rod mill, equipment costs are reduced. expensive;
It requires a sieve and a conveyor as ancillary equipment, consumes a lot of power, has high running costs, and has the disadvantages of complicated maintenance.

In addition, since the quaternary crusher 4 is normally a wet operation type,
Pollution countermeasures such as wastewater treatment are required, and there is also the disadvantage that the installation area of 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, a case 12 is fixed to the lower part of the shell 11, and a gear case 13 is connected to the lower part of the case 12. As shown in FIGS.

The inside of the shell 11 is a primary crushing chamber 14, and the inside of the case 12 is a secondary crushing chamber 15.
Both chambers 14 and 15 communicate with each other via a hole 17 formed in a partition plate 16. A drive shaft 18 is rotatably supported by the gear case 13.
When rotated by, for example, a motor, the rotation is transmitted to the main shaft 20 via the bevel gear 19. The main shaft 20
extends vertically upward from the gear case 13, stands upright at the center of each of the case 12 and the shell 11, and is rotatably supported by a bearing 21 at the middle and lower portions.

A braking force 22 is fixed to the main shaft 20 at a portion passing through the primary crushing chamber 14, and a rotor 23 is fixed below the braking force 22. A braking force piece 25 is attached.

Further, the rotor 23 is provided with upper and lower flanges 26, 26, and a cylindrical grinder 28 is attached to each of a plurality of shafts 27 supported by the flanges 26, 26. The portion protrudes outward from the outer periphery of the flange 26. On the inner periphery of the primary crushing chamber 14, a position corresponding to the breaker piece 25 and a grinder 28 are provided.
A thick liner 29 and a thin liner 30 are alternately lined in the circumferential direction of the crushing chamber 14 at positions corresponding to the crushing chamber 14, and the inner periphery thereof is uneven.

Further, the main shaft 20 has an eccentric shaft portion 31 at a portion passing through the secondary crushing chamber 15, and a core 32 is rotatably supported by the eccentric shaft portion 31. Therefore, when an external force is applied to the core 32, the core 32 does not rotate, and only the main shaft 20 rotates. The upper and lower portions of this core 32 form tapered surfaces 33 and 34 that slope toward the end surfaces. : A cylindrical body 35 is fixed to the inner periphery of the next crushing chamber 15, and the lower inner periphery of this cylindrical body 35 is a tapered surface 36 parallel to the lower tapered surface 34 of the core 32. A discharge port 38 is formed in communication with a tapered passage 37 formed between the core 32 and the core 32 .

Note that 39 is a chute connected to the discharge port 38.

The present invention has the above structure, and when the drive shaft 18 is rotated by, for example, a motor, the rotation is transmitted to the main shaft 20 via the bevel gear 19.

After the main shaft 20 is rotated in this manner, the particle size is adjusted using a supply hopper, belt conveyor, feeder, etc. 200-30
0T! When a large piece of material to be crushed of approximately Rln is supplied to the primary crushing chamber 14, this material is subjected to impact crushing and shear crushing by the rotation of the breaker piece 25, and is further crushed by the revolution and rotation of the grinder 28. Shattered again by impact. This primary crushed material. falls naturally into the secondary crushing chamber 15 from the hole 11 of the partition plate 16. In the secondary crushing chamber 15,
Since the core 32 moves eccentrically in the radial direction, the material to be crushed that has entered the secondary crushing chamber 15 is crushed into fine pieces by the compression action of the core 32 as it moves downward through the passage.
It becomes sand.

This sand naturally falls from the discharge port 38 into the chute 39. In addition, in the embodiment, the breaker piece 25 and the grinder 28
The primary crushing mechanism with
Although the secondary crushing mechanism equipped with 2 is provided, the primary crushing mechanism and the secondary crushing mechanism can also be reversed to crush objects to be crushed.

Further, as shown in FIG. 6, a plurality of cores 32 are provided on the main shaft 20.
, 32 are eccentrically fixed, and the object to be crushed can be compressed and crushed by the respective cores 32, 32.

Note that as the rock is crushed, the particle density increases, so by making the passage 37 formed between the core 32 and the cylinder 35 expand downward as shown in FIG. can be discharged smoothly.

As described above, according to the present invention, the material to be crushed supplied to the primary crushing chamber is subjected to impact and shear crushing by the breaker pieces,
Since the primary crushing was done by impact crushing with a grinder, the distance between 2007m and 300m! It is possible to crush materials to be crushed in large chunks of about n size, and the primary crushed materials are supplied to the lower crushing chamber for secondary crushing by compression crushing due to the eccentric movement of the core. , large chunks of material to be crushed can be efficiently pulverized by one machine.

In addition, since the breaker piece, grinder, and core are driven by the rotation of the main shaft, the overall size can be made smaller, and a rolling bearing can be used for the bearing part of the main shaft, so a sliding bearing can be used. This is advantageous in terms of mechanical efficiency and lubrication compared to the case where the spindle is supported by using a spindle. Further, the material to be crushed moves from the saw crushing chamber to the secondary crushing chamber by natural fall, and flows out from the outlet at the lower end of the secondary crushing chamber, so no power is required to move the material. In addition, since it is a dry method, there is less need for pollution prevention measures such as wastewater treatment, and it is possible to omit a large amount of incidental equipment, so it is inexpensive and can reduce the installation area. It is possible to achieve the effect of

[Brief explanation of drawings]

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 ■1-■ 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 ■1-■ in Figure 2. and seventh
The figure is a longitudinal sectional view showing another embodiment of the invention. 14...Primary crushing chamber, 15...Secondary crushing chamber, 2
5... Breaker piece, 28... Grinder.

Claims (1)

[Claims] 1 A crushing chamber having a rotatable breaker piece in the upper part and a grinder in the lower part that can revolve and rotate, and a crushing chamber having a core that moves eccentrically in the radial direction are vertically coupled, and both of the above-mentioned A vertical dry crusher in which the main shaft for driving the breaker piece, grinder, and core are arranged and rotatably supported in the center of the crushing chamber.