JPH0131313Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is applicable to cement raw material crushing equipment, cement clinker crushing equipment, coal crushing equipment for cement firing, thermal power generation business, and fuel coal crushing equipment for general boilers. This invention relates to a granular material feeding device for a vertical crusher that can be applied to a vertical crusher for general ore crushing equipment.

(Prior Art) Figures 8 to 10 show an example of a conventional vertical crusher, in which a table 2 rotates in a horizontal plane by a drive device 1, a crushing drying chamber 3 extending above the table 2, and a table 2. An inclined chute 4 supplies the granular material onto the table 2, and a plurality of rollers rotate by friction as the table 2 rotates while pressing the granular material layer supplied onto the table 2 against the table 2 and pulverizing it (Fig. 2). There are two rollers 9a, 9b (in FIG. 3, four rollers 9a, 9b, 9c, 9d), a roller shaft 10 supporting the rollers, and a roller around the table 2 as shown in FIGS. 2 and 3. Annular gas ejection zone 1
1, and slots 13 and 13a constituting a crushed material overflow zone 12. and gas ejection zone 1
Hot gas introduced from the hot gas inlet 14 through the hot air chamber 15 is blown upward from the slot 13 of the hot gas chamber 1. Further, directly below the slot 13a of the pulverized material overflow zone 12, there is an overflow pulverized material outlet chute 1.
8 is provided. Furthermore, a classifier 16 and a gas outlet 17 for carrying out the crushed fine powder are provided above the crushing and drying chamber 3.

Next, the functions and drawbacks of the conventional apparatus will be explained with reference to FIGS. 11 to 14. First, FIG. 11 shows a vertical roller crusher equipped with two rollers 9a and 9b and an inclined chute 4 of a conventional structure. This is an example, and the shaded part 24 indicates a roller rolling part where the granular material supplied by the rollers 9a, 9b and the table 2 is crushed and crushed.

The granular material that flows out from the outlet 8 at the tip of the inclined chute 4 in the chute direction and falls onto the table 2 is affected by the inertial force in the chute direction caused by the angle of fall and the falling speed and the rotation of the table at the falling point. The particles move in the direction of the combination of frictional force, centrifugal force, etc. generated in the agglomerates, and move in the direction of the arrow 21 while spreading on the table 2 as shown in the locus of motion 21 shown in FIG. is crushed by a roller, and the remainder reaches the outer periphery of the table 2 as it is.
That is, as shown in FIG. 11, the granular material 20 supplied onto the table 2 by the inclined chute 4 of the conventional structure is not effectively supplied to the rolling portions 24 of the rollers 9a and 9b. Only a portion of the powder is directly supplied to the rolling part of the rollers and pulverized by rolling, and the load also becomes uneven between the rollers, which causes a decrease in the crushing efficiency of the crusher and the occurrence of vibrations. was.

Therefore, in order to eliminate the above-mentioned cause, conventionally, hot gas is ejected at a high speed from the gas ejection zone 11 around the table 2, and the crushed material that moves to the peripheral edge of the table and falls due to the centrifugal force caused by the rotation of the table 2 is removed. Coarse particles are blown into the upper space by a jet and returned to the table, relatively fine particles are classified by a classifier 16 installed above the table, and coarse particles are returned to the table 2 and crushed. , the fine powder is conveyed by hot gas and taken out from the gas outlet 17 at the top of the pulverizer. On the other hand, the granular material overflowing from the table 2 is discharged from the overflow pulverized material outlet chute 18 under the table and disposed of, or is returned to the table by the transporter 19 and pulverized.

Next, FIG. 13 shows four rollers 9a, 9b, 9
9d and 9d are examples of a vertical roller crusher equipped with a conventional inclined chute 4, and 24 indicates a roller rolling part as in the case of FIG. 11 described above. Now, the granular material flowing out from the outlet 8 of the inclined chute 4 and falling onto the table 2 is subjected to the same action as explained above, and moves on the upper surface of the table 2 as shown in the locus of movement 21 shown in FIG. Since it moves in the direction of the arrow 21 while spreading, a sufficient load is applied to the rollers 9c and 9d, but the rollers 9a and 9b are shown to be in a state where almost no load is applied due to direct entry of the feed material.

Next, FIG. 12 shows a vertical roller equipped with two rollers 9a and 9b and a conventional inclined chute 4 whose chute width is divided into two divided chute 4a, the same number as the rollers, by a partition 5 in the chute direction. This is the case of a crusher, and the driving trajectory 22 of the granular material supplied onto the table 2 shows that it is effectively supplied to the two rollers 9a and 9b. On the other hand, in FIG. 14, four rollers 9a, 9b, 9
c, 9d, and the granular agglomerates supplied onto the table 2 in a crusher equipped with a conventional inclined chute in which the width of the chute is divided into four divided chute 4a, the same number as the rollers, by a partition 5 in the chute direction. The object's motion trajectory 21 is poor for crushing. That is, for a crusher with four rollers, if the chute is divided into small chute of the number of rollers and the length of the divided chute is adjusted, the result will be as shown in Fig. 14, and as shown in Fig. 13.
Although the situation has been improved from the one shown in the figure, there are some rollers whose load is insufficient, and the load on all rollers is uneven, which causes problems such as reduced performance and vibration of the crusher. Ta.

A summary of the evaluation of the performance of the chute in this type of vertical crusher equipped with the conventional inclined chute described above, including the load condition under direct pressure of the feed material on each roller and the uniformity of the load on all rollers. Then, it is as follows.

(a) In the conventional inclined chute with a single structure, the crusher with two rollers was defective (Fig. 11), and the crusher with four rollers was particularly defective (Fig. 13).

(b) If the width of the inclined chute is divided into the same number of divided chute as the number of rollers by a partition plate, and the length of the divided chute is adjusted, it works well in a crusher with two rollers (Fig. 12). However, a crusher with four rollers was defective (Fig. 14). That is,
For a large-capacity crusher equipped with four rollers, a chute with a conventional structure did not provide sufficient crushing performance.

(Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems, and in a vertical roller crusher, allows each roller to exert a sufficient rolling crushing effect, and distributes the load evenly to all rollers. The present invention aims to provide a granular material feeding device that has the function of supplying granular material onto a table and is suitable for exhibiting performance, especially for a large-capacity vertical roller crusher.

(Means for Solving the Problems) Therefore, the present invention provides a vertical crusher that crushes and crushes granular material supplied onto a rotating table using a plurality of crushing rollers or balls.
A dividing portion cylindrical body provided with a partition plate that equally divides the cross section of the passage so as to equally divide the falling granular material into the same number as the number of the crushing rollers or balls is disposed above the rotation center of the table. , the granular agglomerates supplied to the crusher are guided to the top of the dividing part cylindrical body and flowed down, and the equally divided granular agglomerates are sent to the corresponding roller pressing parts such as the crushing rollers or balls. A distributing inclined surface for guiding and discharging directly into each zone on the table is connected to the lower side of each dividing partition plate.

(Function) In the above configuration, the granular raw material fed into the vertical crusher by the conventional type single-structure inclined chute is further arranged above the rotation center of the table with its axis substantially perpendicular to the vertical crusher. the same number of grinding rollers or balls, by passing through a divided part of the same chute,
The raw material is divided into equal amounts and further divided into equal parts by a distribution section of the chute connected directly below the division section of the chute, and the raw material is directly introduced into each roller with a spread corresponding to the width of the rolling section. By supplying the powder to a position on the table where it can be used, it is possible to apply an even and sufficient crushing load to all rollers, thereby improving the crushing performance.

(Example) An example of the present invention will be explained below with reference to the drawings. Figures 1 to 7 show an example of the present invention, and Figures 1 and 2 show a vertical crusher with four crushing rollers. FIG. 1 is a longitudinal cross-sectional view of the granular material supply chute 30a of the present invention, and FIG. 2 is a cross-sectional view taken along line A to A in FIG. 1. Fig. 3 shows a case where the granular material supply chute 30b of the present invention is applied to a vertical crusher having two granular material introduction chute 4, 4a and two pulverizing rollers. A of
~A sectional view, FIGS. 4 and 5 show the crushing roller 4
FIG. 2 is a structural diagram of a granule supply chute according to an embodiment of the present invention for a vertical crusher, and is an enlarged view of the chute 30a of FIGS. 1 and 2; 4 is a sectional view taken along the line D to D in FIG. 5, and FIG. 5 is a sectional view taken along the line C to C in FIG. 4.

6 and 7 are explanatory views of the effect of applying the dividing and distributing chute 30a, 30b of the present invention to a vertical crusher. In the case of two pieces, the locus 22 of the movement of the granules supplied onto the rotating table 2 from the granules supplying chute 30a or 30b of the present invention is
and shows the improved feeding conditions for the rolling section 24 of each grinding roller.

In the figure, 2 is a table of the pulverizer that rotates in a horizontal plane, 1 is a driving device for the table, 3 is a pulverization drying chamber that extends above the table 2, 4 is a chute for introducing the granular raw material into the pulverizer, and 30a is the This is a granular material supplying chute connected to the tip of the chute 4 and arranged above the rotation center of the table 2 with its axis substantially perpendicular to the center of rotation of the table 2.

9a, 9b, 9c, and 9d are pulverizing rollers arranged on the table 2, which crush the granular material supplied onto the table 2 from the granular material supply chute 30a by pressing it onto the table 2. It rotates due to friction as the table 2 rotates. 10 is the axis of the roller, 13b is a slot on the outer periphery of the table 2, and is a gas passage through which the hot gas introduced from the hot gas inlet 14 is blown upward through the hot air chamber 15, and at the same time is pulverized by the rollers 9c to 9d. The crushed material is shaken out to the outer periphery by the rotation of the table 2, and serves as a falling path for the remaining granular material transported upward by the hot gas blowout.

Further, a classifier 16 is installed in the upper part of the pulverization drying chamber 3 to separate coarse powder from the pulverized material carried by the rising gas flow and return it to the table 2 for pulverization. The remaining fine powder is taken out along with the gas through the gas outlet 17 at the top of the crusher. On the other hand, the granular raw material falling from the slot 13b on the outer periphery of the table 2 is taken out from the overflow pulverized material outlet chute 18, carried upward by the transporter 19, and circulated through the introduction chute 4 to the pulverizer.

Introducing granular raw material into the vertical crusher Chute 4
The configuration and operation of the granule supply chute 30a connected to the tip of the granule material supply chute 30a are as follows. Granule supply chute 30a shown in FIGS. 4 and 5
The receiving section 31, the dividing section 32, and the distributing section 33
The dividing part 32 and the distributing part 33 are integrally constructed, and are connected to the upper receiving part 31 by bolts at the adjusting flange 36 at the upper end. The feeding angle and position of the granular raw material can be adjusted. The receiving part 31 is connected to the introduction chute 4, and at the same time is provided with a throttle 35 if necessary, so that the granular material received from the introduction chute 4 is collected in the center part and flows down to the dividing part 32 below.
The divided part 32 has a cross section of 4 on the inside of the divided part cylindrical body 37.
It has a cross-shaped vertical division partition plate 38a that divides the flowing granular raw material into four equal parts.

The distribution section 33 has four distribution inclined surfaces 39 which are connected to the dividing partition plate 38a and which are adjacent to each other and have different directions at 90 degrees, and a distribution section side plate 41 that surrounds the outside of the inclined surfaces.
is provided, and the granular material divided into four equal parts by the upper dividing part 32 is guided onto the respective connected slope surfaces 39, and is supplied onto the table 2 from the position of the lower tip of the slope surface toward the direction 40 of the slope. do. Also, as described above, the combination of the positions of the adjusting flanges 36 allows the feed angle and position relative to the roller position to be adjusted.

Now, in FIG. 6, the granular raw material 20 supplied to the vertical crusher through the introduction chute 4 is divided into four equal parts by the dividing partition plate 38a, and then divided into four equal parts from the tip of each inclined surface 39. The table 2 is fed onto the table 2 rotating in the direction of the slope, and spreads out toward the outer periphery of the table on the table 2 with a movement locus 22 as shown in FIG. It is pressed onto the top and crushed and crushed.

To maximize the performance of a vertical crusher,
For this purpose, the supplied granular raw material is equally distributed to all the crushing rollers, and at the same time, the crushing load is evenly and sufficiently applied to all the crushing rollers. To provide a supply state in which a movement trajectory of the granular raw material is obtained such that the spread of the granular raw material becomes equal in the roller pressing section 24, that is, direct entry into the roller pressing section is most effectively performed. is necessary,
This can be effectively achieved by the shoot of the present invention.

Figure 3 shows the introduction chute 4 of two granular raw materials,
In this embodiment, the granule supply chute 30b of the present invention is applied to a vertical pulverizer having a pulverizer 4a and two pulverizing rollers, and the structure and operation of the pulverizer are as follows. Note that the same components as in the case of four crushing rollers are omitted. Now, the two chute 4, 4a for introducing granular raw materials shown in FIG. In the chute for the granular raw material to be supplied, both the chute are connected and collected in the receiving part (corresponding to 31 in FIG. 4) of the granular material supply chute 30b of the present invention, and after being collected in the center by the aperture 35, Let it flow down to the lower division part (corresponding to 32 in Fig. 4). As an example, the partition plate of the dividing section is arranged as shown in 30b in Fig. 10 to divide two crushing rollers into two, and the slopes 39 of the distribution section 33 are also provided as slopes 180° opposite to each other on both sides of the partition. It will be done.

Due to the above configuration two introduction shots 4, 4
The granular raw material introduced into the crusher from a is aggregated,
After dividing, the granules are fed onto the table 2 from the slope in the opposite direction by 180 degrees, and the locus of movement of the granular material on the table is adjusted so that the two crushing rollers 9a and 9b can most effectively exert the crushing effect. be able to.
In the case of a vertical crusher having two intake chute for introducing granular raw material, by adopting the chute 30b of the present invention, the raw material from both chute is collected in the center and divided into downstream parts. , mixing occurs, and compared to the case of supplying from two independent chute, the particle size and components of the granular raw material supplied to each crushing roller 9a, 9b are averaged, and the effect of improving the crushing performance is added.

(Effects of the invention) Since the invention is constructed as explained in detail above, it is possible to make each roller exert a sufficient crushing effect and to apply the load evenly to all the rollers, so that the granular material is transferred onto the table. can be supplied.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a vertical crusher showing an embodiment of the present invention, Figs. 2 and 3 are sectional views taken from A to A in Fig. 1 showing different embodiments, and Fig. 4 is a 5 is a sectional view from D to D in FIG. 5, FIG. 5 is a sectional view from C to C in FIG. 4, and FIGS. 6 and 7 are detailed views of FIG. 2 and 3, respectively. Operation explanatory diagram, Figure 8 is a vertical cross-sectional view of a conventional vertical crusher, Figures 9 and 10
The figures are sectional views taken from B to B in Fig. 8, each having a different structure, and Figs. 11, 12, 13, and 14 are explanatory views of the operation of a conventional crusher, respectively. Explanation of main parts of the figure, 2...Table, 9a~
9d... Grinding roller, 30a, 30b... Granule supply chute, 38a, 38b... Dividing partition plate, 39... Distribution section inclined surface.

Claims (1)

[Scope of utility model registration request] In a vertical crusher that crushes and crushes granules supplied onto a rotating table using a plurality of crushing rollers or balls, the falling granules are divided into the same number as the number of crushing rollers or balls. A dividing cylindrical body provided with a partition plate that divides the passage cross section into equal parts is placed above the rotation center of the table, and the granular material supplied to the crusher is passed through the dividing cylindrical body. A distributing inclined surface that guides the equally divided granular material to the top and flows down, and guides and flows out the equally divided granular material to each zone on the table that directly enters the corresponding crushing roller or roller rolling section such as a ball. A granule/agglomerate supply device for a vertical crusher, characterized in that it is configured to be connected below each of the dividing partition plates.