JPH0212148B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vertical pulverizer that pulverizes cement raw materials, coal, chemicals, etc. between a rotary table and rollers.

[Conventional technology]

BACKGROUND ART Vertical crushers equipped with a rotary table and rollers are widely used as a type of crusher that finely crushes granules such as cement raw materials, coal, and chemicals into powder.

FIG. 6 is a schematic cross-sectional view showing the vicinity of the crushing part of this type of conventional vertical crusher. This will be explained based on the figure. The vertical crusher 1 is fixed on the machine base 2. A cylindrical casing 3 is provided, and a rotary table 4 that is driven by a motor (not shown) and rotates horizontally is supported at the bottom of the casing 3 concentrically with the casing 3. 5 divides the machine base 2 into multiple equal parts in the circumferential direction outside the casing 3 (in this example, it is divided into three equal parts)
The piston rods 6 are engaged in the casing 3, and the working end of each piston rod 6 has a roller bearing 7 pivotally mounted thereon.
Reference numeral 8 denotes three roller shafts having one end supported by each roller bearing 7, and the other end of each roller shaft 7 being supported by a center bearing 9 disposed above the center of the rotary table 4. are connected by
A roller 10 is mounted on each roller shaft 8 with its peripheral surface parallel to the upper surface of the rotary table 4. By moving the piston rods 6 of the three hydraulic cylinders 5 forward and backward at the same time, the three rollers 10 move up and down in unison to adjust the gap between them and the surface of the rotary table 4, and to maintain a small gap at all times. The structure is designed to avoid so-called metal touch.

Above such a crushing section, there is a rotary table 4.
A supply pipe (not shown) is provided to supply raw materials upward, and an annular passage 11 of hot air blown up by a blower is provided around the rotary table 4. A plurality of blades 12 are arranged radially.

With the above configuration, raw materials such as coal supplied from the supply pipe onto the rotary table 4 are crushed between the rotating rotary table 4 and the rollers 10 that rotate following the rotary table 4. It comes off the periphery of the rotary table 4 and falls into the annular passage 11, but since hot air is blowing up there, the pulverized powder rises with the hot air, is classified by a separator (not shown), and then falls from the upper end of the casing 3. It is discharged and collected.

A vertical crusher that operates in this way has one roller
Conventionally, a device has been attached to take out the 0 from the machine for inspection, maintenance, replacement, etc. That is, conventionally, as shown in FIG. 6, a portable hydraulic cylinder 13 is separately prepared, and when the roller 10 is taken out, it is moved to the machine base 2.
At the same time, the working end of the piston rod 14 is pivotally connected to the opening/closing door 15 provided in the casing 3, and the piston rod 6 of the hydraulic cylinder 5 for roller pressure adjustment is removed from the bearing 7 and the opening/closing door 1 is installed in its place.
After connecting the center bearing 9 and the roller shaft 8 with the metal fitting 16, the piston rod 14 of the hydraulic cylinder 13 is moved back and the opening/closing door 1 is closed.
By rotating the roller 5 about the pivot 17, the roller 10 is reversed and taken out of the machine. After taking out one roller 10, remove the hydraulic cylinder 13 from the machine base 2, move it to the location corresponding to the next roller 10, attach it to the machine base, repeat the above operation, and then move the hydraulic cylinder 13 further. Then, the next roller 10 was taken out.

[Problem that the invention seeks to solve]

In this way, in the conventional vertical crusher, the hydraulic cylinder 13 for removing the crushing roller 10 for inspection, replacement, etc. is provided separately from the hydraulic cylinder 5 for adjusting the roller pressure, so the number of parts is reduced. Not only does it increase costs, but it also requires multiple rollers 10.
In order to take out the rollers, this one hydraulic cylinder 13 must be attached and detached for each roller 10 and moved, resulting in a problem that the work is extremely troublesome and takes a long time.

[Means for solving problems]

In order to solve these problems, the present invention provides an opening/closing door that opens and closes a window opened in the outer wall of the casing corresponding to each crushing roller and is pivotally attached to the lower edge of the window. The inner side and the bearing member for the crushing roller are removably connected by a connecting fitting, and the base end is pivoted to the machine base side outside the casing, and the working end of the piston rod is connected to the outside of the door and the bearing member for the crushing roller. A fluid cylinder selectively pivotally attached to the shank is provided to serve both for adjusting the pressure of the crushing roller and for removing the crushing roller from the casing.

[Effect]

During normal crushing work, if the opening/closing door is disconnected from the roller bearing member by the coupling fitting and the piston rod working end of the fluid pressure cylinder is pivotally connected to the roller bearing member, the crushing roller will move up and down as the piston rod moves back and forth. Adjustments are made. When inspecting or maintaining the crushing roller, connect the opening/closing door and the roller bearing member with a connecting fitting, remove the piston rod working end of the fluid pressure cylinder from the roller bearing member, and attach it to the outside of the opening/closing door. When the opening/closing door is opened by retreating, the crushing roller, which is connected to the opening/closing door by a connecting fitting, is reversed and taken out of the casing.

〔Example〕

1 to 3 show an embodiment of the vertical crusher according to the present invention, FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is an enlarged AA sectional view of FIG. 1, and FIG. figure
It is a BB enlarged sectional view. In these figures, the vertical crusher 20 includes a triangular machine base 21 buried in a foundation, a cylindrical casing 22 fixed to this, and a cylindrical upper part flanged to this casing 22. The upper opening end of the upper casing 23 is
A concentric raw material supply pipe 24 and a discharge pipe 25 are closed by an annular lid body 26 integrally formed in the center. The upper open end of the raw material supply pipe 24 faces the terminal end of a conveyor or the like (not shown), and the raw material as a material to be crushed, which is conveyed by the conveyor or the like, is supplied to the raw material supply pipe 24 and falls.

On the other hand, in the lower part of the casing 22, a bearing 27 and a gear box 28 are supported by the casing 22 side and are arranged above and below, and a collar with a flange is supported by the bearing 27 and the gear box 28 via a rolling bearing. The table shaft 29 of the gearbox 2
It is rotationally driven by a motor via a speed reduction device such as a worm and a worm wheel provided inside the worm.
The rotary table, generally designated by the reference numeral 30, is bolted to the upper end flange of the table shaft 29, and is fixed to an inverted conical table body 30a and a concave portion on its upper surface with a presser plate 30b and bolts 30c. It is formed of an annular liner 30d and an annular rim 30e bolted to the outer periphery of the upper surface.
It is inserted into an intake chamber 31 formed concentrically within the casing 22 and rotates together with the table shaft 29. The intake chamber 31 is provided with an intake port 33 that is connected to an exhaust port 32 provided in the discharge pipe 25 through a duct (not shown). The hot air is blown up inside the casing 22 along a path indicated by an arrow, and is discharged from the exhaust port 32 and circulated. A plurality of blades 34 are radially provided in an annular hot air blowing passage formed between the peripheral wall of the intake chamber 31 and the rotary table 30 to guide the hot air blowing up.

On the other hand, three hydraulic cylinders 35 are pivotally supported via brackets 36 at each vertex of the triangle outside the casing 22 of the machine base 21, and the hydraulic pressure of each hydraulic cylinder 35 is The piston rod 37, which moves back and forth, is supported by a flexible seal 40a and inserted into the casing 22. The piston rod 37 is a right-handed screw shaft 37
a and a left-handed threaded shaft 37b, both shafts 3
7a and 37b are telescopically connected by a removable turnbuckle 38 consisting of a threaded pipe 38a and nuts 38b and 38c screwed into the right-hand and left-hand threads thereof. The left-handed threaded shaft 37b of the piston rod 37 is supported by a connecting plate 39 that connects the casing 22 and the intake chamber 31 via a flexible seal 40, and has a U-shaped head at the working end that projects from the connecting plate 39. The portion 37c is pivotally attached to a bracket 41, which is an L-shaped bearing member. A roller shaft 42 is attached to a bearing portion 41a formed on each of the three brackets 41 with a knock pin 4.
3, and movement in the axial direction is restricted by a presser plate 44 and bolts 45. Each roller shaft 42 extends slightly inclined toward the center of the rotary table 30, and the three roller shafts 42
The distal end portion of is integrally connected by a triangular annular center bearing 47 fixed to the end face with a bolt 46. 48 is a radial rolling bearing 4
The crushing roller is rotatably fitted to each roller shaft 42 via rollers 9 and 50, and has a truncated conical shape as a whole, and has a main body 48a, a presser foot 48b fitted to this, and It is integrally formed with an annular tire 48e fixed with bolts 48c and 48d, a bearing retainer 48f, and the like. Each crushing roller 48 is configured such that the circumferential surface of the tire 48c is in contact with the upper surface of the liner 30d of the rotary table 30, and the contact pressure thereof is adjusted by moving the piston rod 37 of the hydraulic cylinder 35 back and forth. There is. Note that a slight gap is provided between the circumferential surface of the crushing roller 48 and the surface of the rotating roller 30 during the crushing operation. Reference numeral 51 designates a stopper that is screwed into the nut portion of the casing 22 and adjustably restricts the lower limit of the crushing roller 48 by advancing and retracting the stopper.
is for adjusting the contact pressure of each crushing roller 48 individually. The bracket 41 that integrally supports each crushing roller 48 in this way is supported by the hydraulic cylinder 35, and at the same time, as shown in FIG. It is also supported by a support rod 52 which is pivotally connected to the support rod 52.

Further, three windows 22a are opened in the peripheral wall of the casing 22, corresponding to each crushing roller 48, and a bracket 22b on the casing 22 side provided at the lower edge of each window 22a has an opening/closing door. 53
is pivotally supported via a bracket 54 about a pivot 55 so as to be openable and closable. Another bracket 56 is provided at the center of the upper part of the opening/closing door 53 to project outward, and the piston rod 37 of the hydraulic cylinder 35 connects its U-shaped head 37c to this bracket 56 and the bracket 41. It is configured to be selectively pivoted to either of the following. Openable and closable windows 53a and 53b are provided at the upper right and left sides and at the lower center of the opening/closing door 53 so that an operator can insert his or her hand therein. In addition, when changing the pivot from the bracket 41 to the bracket 56, the coupling of the pivot portion and the connection by the turnbuckle 38 are released. Furthermore, from the inner surface of the opening/closing door 53, the block 5
A plate-shaped connecting fitting 57 reinforced with 7a projects into the casing 22, and the connecting fitting 57 and the bracket 41 are connected to each other by bolts 58.
The parts are removably fastened. It should be noted that during normal crushing work when the piston rod 37 is connected to the bracket 41, the connection between the connecting fitting 57 and the bracket 41 is released. And piston rod 37
After replacing the piston rod with the bracket 56 and connecting the connecting fitting 57 and the bracket 41, the roller shaft 42 and the center bearing 47 as well as the bracket 41 and the support rod 52 are uncoupled, and the hydraulic cylinder 35 is operated to move the piston rod 37 back greatly. and,
As shown by the chain line in FIG. 1, the opening/closing door 53 is opened, and the crushing roller 48 supported by the connecting fitting 57 and the bracket 41 is reversed and taken out of the casing 22.

What is indicated by the reference numeral 59 in FIG. 1 is the rotating roller 3.
The separator is a separator that classifies the powder into particles with a predetermined particle size or more and those with a predetermined particle size or less by colliding the powder that is pulverized by the pulverizer 0 and the pulverizer roller 48 and then blown up with hot air. is formed and fixed above the rotary table 30.

The operation of the vertical crusher configured as above is as follows.
This will be explained using coal pulverization as an example. First, adjust the piston rod 3 of the hydraulic cylinder 35 according to the grinding particle size.
7 is moved forward and backward, and the rotary table 30 and the crushing roller 4
The pressure is adjusted by changing the gap with 8. Then, the motor is started to rotate the rotary table 30, the fan on the duct connecting the intake port 33 and the discharge port 32 is rotated, and granular coal as a raw material is fed into the raw material supply pipe 24. falls through the raw material supply pipe 24 and is supplied to the center of the rotary table 30. The fallen granular coal is subjected to centrifugal force due to the rotation of the rotary table 30 and is moved to the table 3.
At the same time as it slides on zero, it receives a rotational force from the rotary table 30, and by combining these forces, it moves to the outer periphery of the rotary table 30 while drawing a spiral trajectory. Most of the moved granular coal is transferred to the rotary table 30.
The pulverized coal is caught between the pulverized coal and the pulverized roller 48, and is pulverized by compression, impact, and shearing action to become pulverized coal. This pulverized coal and a portion of the granular coal that has not been bitten by the crushing roller 48 separates from the periphery of the rotary table 30 and falls outward. At this time, the hot air sucked in from the intake port 33 is rectified by the blades 34 and blown up in the annular passage around the rotary table 30, so the overflowing pulverized coal and granular coal are removed by this hot air. It is blown up and sent to the separator 59 on the rising air current, where it is classified. As a result of the classification, pulverized coal having a particle size below a predetermined size is discharged from the exhaust port 32 together with hot air, and is transported through the duct to the next process, such as a combustion device or a dust collector, and then recovered. Granular charcoal having a predetermined particle size or more that does not pass through the separator 59 falls onto the rotary table 30 and is repeatedly pulverized.

After performing the crushing work in this manner, when taking out the crushing roller 30 for maintenance, inspection, replacement, etc., remove the flexible seal 40a from the casing 22 and insert your hand through the window 53b. Loosen and remove the turnbuckles 38 of the three hydraulic cylinders 35, pull out the right-handed threaded shaft 37a of the piston rod 37 outside the casing 22, and open the hydraulic cylinders 35 outside the casing 22 through the opening/closing door 53.
Have them lean against each other. After pivoting the separately prepared U-shaped head 37d to the bracket 56,
The right-handed threaded shaft 37a of the piston rod 37 is connected to the U-shaped head 37d. Furthermore, open the openable window 53a provided in the opening/closing door 53, and then insert your hand to connect the connecting fitting 57 and the bracket 41.
After the roller shaft 42 and the center bearing 47, as well as the bracket 41 and the support rod 52 are connected without rattling, the hydraulic cylinder 35 is operated to move the piston rod 37 backward. As shown by the chain line in FIG. 1, the door 53 opens wide around the pivot 55, and the connecting fitting 57 and bracket 41
The crushing roller 48 supported by the crushing roller 48 follows the opening/closing door 53, turns around, and is taken out of the machine. in this case,
After making preparations such as replacing the piston rod 37 for each of the three crushing rollers 48, if the three hydraulic cylinders 35 are operated simultaneously, the three crushing rollers 48 can be taken out of the machine at any time. can. Of course, only one crushing roller 48 can be taken out of the machine. After the crushing roller 48 is taken out of the machine, the crushing roller 48 is attached to the roller shaft 42.
After removing it from the roller shaft 42 for maintenance, replacement, etc., and moving the piston rod 37 forward, the opening/closing door 53 closes and the crushing roller 48 returns to the rotary table 30. Replacement of 37 and roller shaft 42
If you support it, it will return to its working state. The connecting fitting 57 can be attached to the bracket 41 by loosening the bolt 58.
Untie the connection.

4 and 5 show other embodiments of the present invention, with FIG. 4 being a cross-sectional view corresponding to FIG. 2, and FIG. 5 being a longitudinal sectional view corresponding to FIG. be. In this embodiment, the center bearing 47 that connected the tip of the roller shaft 42 in the previous embodiment is not provided, and instead, three brackets 41A having a slightly different shape from the previous embodiment are connected. bar 6
They are connected in a triangular shape by 0. Along with this, the shape of the connecting fitting 57A is slightly different, and the structure near the tip of the roller shaft 42 is slightly different. The rest has the same configuration as the previous embodiment, so the same reference numerals are given and the explanation thereof will be omitted. With this configuration, when the work of taking out the crushing roller 48 out of the machine is carried out, the center bearing 4 in FIG.
Loosen the bolt 61 instead of 7 and remove the connecting bar 60. Other operations are the same as in the previous embodiment.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a vertical crusher, an opening/closing door for opening/closing a window opened in the outer wall of the casing corresponding to each crushing roller is pivotally attached to the lower edge of the window. The inside of the opening/closing door is removably connected to the inside of the opening/closing door and the crushing roller bearing member using a connecting fitting, and a fluid cylinder is provided whose base end is pivotally supported on the machine base side outside the casing. By configuring the piston rod to be selectively pivoted to either the outside of the opening/closing door or the bearing member for the crushing roller, the working end of the piston rod can be changed between the crushing roller side and the opening/closing door side. The roller pressure adjustment cylinder can also be used to open the door and take the crushing roller out of the machine, making it possible to replace the conventional vertical type in which a dedicated cylinder was rotated around and used to take the crushing roller out of the machine. Compared to a crusher,
The number of parts is reduced, reducing costs, and it is easier to remove the crushing roller from the machine.
It can improve work efficiency and reduce labor.

[Brief explanation of drawings]

1 to 5 show an embodiment of a vertical crusher according to the present invention, FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is an enlarged sectional view along AA of FIG. 1, and FIG. figure
BB enlarged sectional view, FIGS. 4 and 5 show other embodiments of the present invention, FIG. 4 is a cross-sectional view corresponding to FIG. 2, and FIG. 5 is a cross-sectional view corresponding to FIG. 3. FIG. 6 is a schematic cross-sectional view showing the vicinity of the crushing section of a conventional vertical crusher. 20... Vertical crusher, 21... Machine base, 22
...Casing, 22a...Window, 30...Rotary table, 35...Hydraulic cylinder, 36...Bracket, 3
7...Piston rod, 37c...U-shaped head, 4
1,41A...Bracket, 48...Crushing roller, 5
3... Opening/closing door, 56... Bracket, 57... Connecting metal fittings, 58... Bolt.

Claims (1)

[Claims] 1. In a vertical crusher equipped with a rotary table that rotates within a cylindrical casing, and a plurality of crushing rollers that rotate as a result of rotation with their peripheral surfaces facing the rotational horizontal plane of the rotary table, the an opening/closing door pivotably attached to the lower edge of each window that opens corresponding to each crushing roller;
A connecting fitting detachably connects the inside of the opening/closing door and the bearing member side for the crushing roller; A vertical crusher comprising: a hydraulic cylinder selectively pivotally connected to one of the bearing members.