JPH06403A - Vertical type crushing apparatus - Google Patents

Abstract

PURPOSE:To quickly stabilize the operation of a vertical type crushing apparatus at the starting time by installing a branching part in the middle of a transporting route wherein the branching part can switch routes selectively and connecting one end in the flowing outside of the branching part with the vertical type crushing apparatus body and connecting the other side with a hopper. CONSTITUTION:Coarse particles produced by brushing operation of the body of the apparatus are supplied to a switching chute 8 through a discharge chute 2, conveyers 3, 4, an iron pieces separator 5, a bucket elevator 6m and a conveyer 7. In the case that a damper in the switching chute 8 is made able to select the route to make the chute 8 directly communicate with an air seal apparatus 9, the coarse particles are directly supplied to a charging chute 13 from the switching chute 8 without passing the hopper 10 and supplied again to the body 1. Also, in the case the damper of the switching chute 8 is rotated to the reverse side, the coarse particles from the conveyer 7 are charged into to the hopper 10 and stored temporarily in the hopper 10. Circular supply of the coarse particles to the body 1 is interrupted by selecting the route of the switching chute 8 and the operation is controlled to be stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical crushing device for returning coarse particles discharged from a vertical crushing device main body to the vertical crushing device main body and crushing again. The present invention relates to a vertical crushing device having an improved configuration of the circulation path.

[0002]

2. Description of the Related Art A vertical crushing device has been conventionally used as a device for crushing raw materials such as cement, coal and limestone. This vertical crushing device is provided with a rotary table therein, supplies the raw material in the form of agglomerates on the rotary table, and crushes the raw material by biting the raw material between a plurality of rollers arranged on the rotary table. I am trying.

In this vertical crushing device, the coarse particles discharged from the vertical crushing device main body are usually returned to the vertical crushing device main body and crushed again.

FIG. 3 is a schematic system diagram showing a conventional example of a vertical crushing device known in, for example, Japanese Patent Laid-Open No. 61-50648. The vertical crushing device main body 1 has a rotary table 1a and a rotary table 1a therein.
It has a plurality of rollers 1b arranged to face the upper surface of the above, a separator 1c arranged above the table 1a in the main body, and a discharge port 1d at the top. In addition, a blower pipe 1e for hot air is connected to the lower part thereof, and a transmission device 1f and the like for rotating the turntable 1a are arranged.

The raw material (new feed) is hopper 13h.
Is supplied to the inside of the main body 1 from the hopper 13h through the charging chute 13 and is crushed by being caught between the table 1a and the roller 1b. The generated fine particles are blown from the hot air supply pipe 1e and are conveyed to the rising hot air stream in the main body 1 to reach the inside of the separator 1c. Then, those having a predetermined particle size or less are sent to the collecting device through the discharge port 1d, and those having a predetermined particle size or more are returned to the table 1a again and crushed. Further, coarse particles have fallen downward from the outer edge of the table 1a, and the coarse particles are returned to the main body 1 again via the discharge chute 2 and the bucket elevator 6.

[0006]

The above-mentioned conventional vertical crushing device has a problem that the operation of the device is difficult to stabilize at the time of starting.

That is, when activating the above-mentioned conventional vertical crushing apparatus, immediately after the start of operation, the amount of hot air in the main body 1, the wind pressure,
The temperature and the like are not constant, and the amount of fine particles conveyed in the main body 1 by air flow varies. Therefore, the fluctuation amount of the amount of coarse particles discharged from the outer edge of the rotary table 1a is also large. Therefore, even when the raw material (new feed) is fed into the main body 1 at a constant rate, the circulation amount of the coarse particles changes, and therefore the total amount of the material to be ground changes considerably. It took a considerably long time for the operation of the main body 1 to stabilize.

[0008]

A vertical crushing apparatus according to a first aspect of the present invention comprises a vertical crushing apparatus main body having a coarse particle discharging portion provided at a lower portion and a fine particle discharging portion provided at an upper portion, A vertical crushing apparatus comprising a hopper for receiving a raw material to be crushed and a cutting feeder provided at the bottom of the hopper, and a raw material supplying device connected to the vertical pulverizing apparatus main body so as to be able to supply the raw material, A vertical crusher equipped with a transportation device for re-supplying the discharge from the coarse-grained portion discharge part of the vertical crusher main body to the vertical crusher main body, the transportation device flowing in the middle of the transportation route. It has a branch part capable of switching between alternatives, and one of the outflow sides of the branch part is connected to the vertical crushing device main body,
The other is characterized in that it is connected to the hopper.

A vertical crushing apparatus according to a second aspect of the present invention is a vertical crushing apparatus main body having a coarse particle discharging section provided at a lower portion and a fine particle discharging section provided at an upper portion, and the vertical crushing apparatus main body. In a vertical crushing apparatus having a raw material supply device connected to the above, a transportation system path for re-supplying the discharge from the coarse-grained content discharging section of the vertical crushing apparatus main body to the vertical crushing apparatus main body is provided. A transporting device and a branching part provided in the middle of the transporting system, capable of selectively switching the flow path, and one of the outflow sides is a branching part communicating with the vertical crushing device main body, A hopper connected to the other outflow side of the branch portion so as to be capable of receiving coarse particles,
It is characterized in that it is provided with a gate provided at the bottom of the hopper for interrupting the outflow of coarse particles and a passage for returning the coarse particles flowing out from the gate to the transportation passage. .

[0010]

In the vertical crusher of the present invention, the raw material (new feed) is put into the main body of the vertical crusher and crushed inside thereof. The generated fine particles are discharged from the upper part, and the coarse particles are discharged from the lower discharge part, and are circulated so as to be charged again into the main body by the transportation device.

In the middle of this circulation path, a branching portion capable of selectively switching the flow path is provided, one of the outflow sides of this branching portion is connected to the vertical crushing apparatus main body, and the other is connected to a hopper.

In the first invention, this hopper is also used as a hopper for feeding the new feed. In the second invention,
The hopper is exclusively used to receive the circulating coarse particles. By communicating the branching portion and the hopper, the returning of the coarse particles to the vertical pulverizer main body can be stopped, and the entire amount of the coarse particles can be stored in the hopper. Of course, the entire amount of the coarse particles can be circulated in the main body by connecting the branch portion and the main body. Therefore, it is possible to adjust the amount of the coarse particles to be circulated into the vertical crushing device in accordance with the start, stop, or operating condition of the vertical crushing device, and to control the operation of the device to be stable.

[0013]

Embodiments will be described below with reference to the drawings. FIG. 1 is a schematic side view showing the configuration of a vertical crushing apparatus according to an embodiment of the present invention. Further, FIG. 2 is a schematic plan view showing the structure of the coarse particle discharge path of the main body.

A rotary table, a crushing roller for crushing the raw material by engaging with the rotary table, a separator for receiving and classifying fine particles generated by the crushing are installed in the vertical crushing apparatus main body 1. Has been done. A discharge port 1d for discharging fine particles classified by the separator and having a predetermined particle size or less is provided above the main body 1, and a coarse particle dropped from the outer edge of the rotary table is provided at the lower part of the main body 1. A discharge chute 2 and a conveyor 3 for discharging the portion are provided. A pipe for supplying hot air into the main body 1 is connected to the lower portion of the main body 1 (not shown).

The coarse particles conveyed by the conveyor 3 are supplied to the iron piece separator 5 by the collecting conveyor 4, and after the iron pieces are removed, they are supplied to the bucket elevator 6 and conveyed upward. A conveyor 7 is connected to the upper outlet of the bucket elevator 6, and a switching chute 8 is provided on the outlet side of the conveyor 7. The switching chute 8 is equipped with a damper (not shown) whose lower end is pivotally supported by the branch point 8a and whose upper end is swingable, and the coarse particles from the conveyor 7 are fed to either the hopper 10 or the charging chute 13. It is possible to select one of the flow paths so as to selectively supply the crab.

The hopper 10 is capable of receiving a raw material (new feed), and is provided with a raw material conveyor 11. A cutting feeder 12 is provided at the lower end of the hopper 10.
Is provided and the charging chute 13 is connected. A predetermined amount of raw material is stored in the hopper 10, and the raw material is used for air sealing. The other outflow side of the switching chute 8 is connected to the closing chute 13 via an air seal device 9. Further, 12a is a raw material discharge port, and 12b is an air seal device, which reverses the cutting feeder 12 at the time of disassembling and checking the cutting feeder 12 and the hopper 10, and the like, and stores the raw materials stored in the hopper 10 and the cutting feeder 12. It is discharged to the outside.

In the vertical crushing apparatus constructed as described above, the raw material (new feed) is supplied into the vertical crushing apparatus main body 1 via the raw material conveyor 11, the hopper 10, the cutting feeder 12 and the charging chute 13, and the rotary table. It is caught between the roller and the roller and crushed. The generated pulverized material is subjected to a classification process by the separator and then discharged from the discharge port 1d and collected as a product. On the other hand, coarse particles generated by the crushing operation in the main body 1 are supplied to the switching chute 8 via the discharge chute 2, the conveyors 3, 4, the iron piece separator 5, the bucket elevator 6, and the conveyor 7. If the damper in the switching chute 8 is selected as a flow path that directly connects the chute 8 and the air seal device 9, coarse particles are directly supplied from the switching chute 8 to the charging chute 13 without passing through the hopper 10. , Is supplied again into the main body 1.

When the damper of the switching chute 8 is rotated to the opposite side, the coarse particles from the conveyor 7 are removed from the hopper 1.
It is thrown in 0 and is temporarily stored in this hopper 10. Therefore, it is possible to intermittently circulate and supply the coarse particles into the main body 1 by selecting the flow path of the switching chute 8.

In this vertical crushing apparatus, at the time of startup, if the flow path for supplying the coarse particles from the conveyor 7 to the hopper 10 is selected, the raw material (new feed) is fed into the main body 1 at the time of startup. Only the configuration will be input,
By keeping the operation of the slicing feeder 12 at a constant speed, the amount of raw material input into the main body 1 (total amount of pulverized material input) becomes constant, and the operation in the vertical pulverizer main body 1 is stabilized early.

When the vertical crushing device is stopped, if the switching chute 8 is selected as a flow path for feeding coarse particles from the conveyor 7 into the hopper 10 and the cutting feeder 12 is stopped, the inside of the main body 1 is stopped. Since the crushed object is not charged, the amount of the crushed object remaining in the main body 1 is rapidly reduced, and the stop can be quickly performed.

In the steady operation state, the switching chute 8 directly puts coarse particles from the conveyor 7 into the chute 1.
By setting the flow path to be supplied to No. 3 and circulating the coarse particles in the main body 1, an efficient pulverization operation can be performed. Further, when the amount of coarse particles discharged from the main body 1 is temporarily increased during the steady operation, the switching chute 8 is arranged so as to input the coarse particles from the conveyor 7 to the hopper 10.
By switching, it becomes possible to narrow down the amount of the crushed material to be charged into the main body 1, and the load fluctuation range of the main body 1 can be made small.

FIG. 4 is a side sectional view showing a schematic structure of a vertical crushing apparatus according to a different embodiment of the present invention, and FIG. 5 is a schematic plan view showing a structure of a coarse particle discharge path of the apparatus. It is a figure.

In the embodiment shown in FIG. 1, the hopper 10 was configured to receive both the new feed raw material and the recirculated coarse particles, but in the embodiments shown in FIGS. 4 and 5, the recirculated coarse material is used. It has a dedicated hopper that accepts only grain.

In FIG. 4, coarse particles discharged from the vertical crushing apparatus main body 1 by the discharge chute 2 are supplied from the conveyor 3 to the bucket elevator 6 and lifted upward by the bucket elevator 6 and then the switching chute. It is thrown in 8. One of the outflow sides of the switching chute 8 is an iron piece separator 5
It is connected to the coarse grain charging chute 14 through. The other outflow side of the switching chute 8 is connected via a chute 16 to a hopper 15 as a coarse grain fraction receiving tank. A cut gate 17 is installed at the lower end of the hopper 15 so that coarse particles can be stored in the hopper 15. A chute 18 is connected to the cut gate 17,
The coarse particles in the hopper 15 can be supplied to the bucket elevator 6. In addition, in FIG.
Is a rotary table, 1b is a crushing roller, 1c is a separator, 1f is a transmission for driving the rotary table 1a, 19
Indicates a scraper for discharging coarse particles. Further, 17a is a branch chute for extracting the coarse powder, and is also designed to discharge the coarse powder in the hopper 15 to the outside as needed.

Also in the vertical crushing apparatus shown in FIGS. 4 and 5 constructed as above, the coarse particles from the main body 1 can be stored in the hopper 15 by switching the switching chute 8. The amount of coarse particles to be circulated and supplied can be adjusted. Therefore, similarly to the above embodiment, the operation at the time of starting the vertical crushing device can be stabilized early. It should be noted that the stop can be performed very quickly. Further, it is possible to reduce the load fluctuation range during steady operation.

As in the embodiment shown in FIGS. 4 and 5, the present invention can be applied to a vertical crushing apparatus not equipped with a hopper for raw material (new feed). Note that, in FIGS. 4 and 5, only one discharge chute 2 is provided, and the device configuration is simplified by that much.

In the above embodiment, a bucket elevator, a conveyor, a chute, etc. are adopted as a coarse grain transporting device, but the present invention is basically a transporting device of various configurations other than the above as long as the coarse grain can be circulated and supplied. It is clear that can also be used.

[0028]

As described above, according to the vertical crushing apparatus of the present invention, it is possible to control the circulating supply amount of the coarse particles discharged from the vertical crushing apparatus main body, and at the time of starting the vertical crushing apparatus. The operation of can be stabilized.

[Brief description of drawings]

FIG. 1 is a side view of a vertical crushing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of the apparatus shown in FIG.

FIG. 3 is a side view showing a conventional example.

FIG. 4 is a schematic vertical sectional view of a vertical crushing apparatus according to another embodiment of the present invention.

5 is a plan view of a main part of the apparatus shown in FIG.

[Explanation of symbols]

 1 Vertical grinding machine main body 2 Discharge chute 3 Conveyor 4 Collective conveyor 6 Bucket elevator 8 Switching chute 10, 15 Hopper

Claims (2)

[Claims] 1. A vertical crushing apparatus main body having a coarse grain discharge portion provided at a lower portion and a fine grain discharge portion provided at an upper portion, a hopper for receiving a raw material to be crushed, and a bottom portion of the hopper. A vertical crushing device comprising a cutting feeder and a raw material supply device connected to the vertical crushing device main body so as to be able to supply raw materials, wherein the vertical crushing device main body discharges from a coarse particle discharge part. A vertical crushing device comprising a transporting device for re-supplying an object to the vertical crushing device main body, wherein the transporting device has a branching part in the middle of its transporting path, which is capable of selectively switching a flow path, One of the outflow sides of the branch portion is connected to the vertical crushing apparatus main body, and the other is connected to the hopper, and the vertical crushing apparatus is characterized. 2. A vertical crushing apparatus main body having a coarse particle discharging section provided at a lower portion and a fine particle discharging section provided at an upper portion, and a raw material supply device connected to the vertical crushing apparatus main body. A vertical crushing device comprising: a transporting device having a transport system path for re-supplying the discharge from the coarse-grained material discharging part of the vertical crushing device body to the vertical crushing device body; Is a branch part provided in the middle of which the flow path can be selectively switched, and one outflow side is connected to the vertical pulverizer main body and the other outflow side of the branch part. A hopper that is connected to accept the coarse particles, a gate that is provided at the bottom of the hopper to interrupt the outflow of the coarse particles, and a system that returns the coarse particles that flow out from the gate to the transport system path. A vertical crushing device characterized by having a path.