JPH02245248A - Vertical crusher - Google Patents

Abstract

PURPOSE:To easily perform regulation of the upper and lower positions of a pressure frame by projecting plate springs to one of both the inner face of a casing and the outer face of the pressure frame and also providing projections to the other hand and engaging the projections with the plate springs to fit the pressure frame to the casing. CONSTITUTION:A rotary table 3, a plurality of crushing rolls 4 arranged on the rotary table 3 and a pressure frame 6 mutually connecting these crushing rolls 4 are provided in a casing 1. The plate springs 17l are projected to one of both the inner face of the casing 1 and the outer face of the pressure frame 6 and also projections 17k are arranged to the other hand. The projections 17k are engaged with the plate springs 17l and thereby the pressure frame 6 is fitted to the casing 1. As a result, regulation of the upper and lower positions of the pressure frame can be easily performed. Such effect is obtained so that cost for constituting the device of a vertical crusher is lowered or maintenance is made easy.

Description

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

[Prior Art] Vertical pulverizers equipped with a rotary table and rollers are widely used as a type of pulverizer for finely pulverizing powders such as cement raw materials, coal, and chemicals. This type of crusher consists of a disk-shaped rotary table that is driven by a motor with a reducer to rotate at low speed in the lower part of a cylindrical casing, and a part that divides the outer circumference of the upper surface into equal parts in the circumferential direction, which is pressed by hydraulic pressure or the like. It is equipped with a plurality of rollers that are driven to rotate.

In this vertical crusher, powder as a raw material is supplied to the center of the rotary table through a supply pipe, and when the table rotates, the powder is subjected to centrifugal force in the radial direction of the table, and as it slides on the table, it is rotated by the table in the direction of rotation. It receives the force, slides between it and the table, and rotates somewhat slower than the table rotation speed.

The above two forces, that is, the forces in the radial direction and the force in the rotational direction are combined, and the powder moves to the outer periphery of the rotary table while drawing a spiral trajectory on the table. Since the roller is in pressure contact with this outer periphery and is rotating, the particles with spiral lines enter between the roller and the rotary table from a direction that forms a certain angle with the roller axis direction and are bitten. Smash.

On the other hand, hot air is guided to the base of the casing by a duct, and this hot air blows up from the annular space between the outer circumferential surface of the rotary table and the inner circumferential surface of the casing, preventing the fine powder from being dried. It rises inside the casing and is discharged from the outlet as a mixture with hot air and sent to the next process.

By the way, it is rare for the material to be crushed supplied to the crusher to be crushed into the fine powder particle size required by this crusher by being subjected to the crushing action by the crushing rollers only once, and the material may fall to the center of the rotary table. Not all of the crushed material is bitten by the crushing rollers, so even if the powder and granules that reach the outer edge of the rotary table rise up on the hot air current blowing up from the annular space, they will not be able to get into the crusher. By the time the particles reach the separator installed at the top, depending on their particle size, they may fall or be classified and removed by the separator and returned to the rotary table.

In this way, the material to be crushed, which is constantly fed into the crusher, rises from the rotary table to the separator or passes through the rotary table until it reaches the desired fine powder particle size to become the final product and flows out of the crusher. The powder is gradually crushed by falling from the middle of the separator many times until it reaches the desired particle size.

By the way, in a vertical crusher, the frame body (hereinafter referred to as
A pressure frame) is provided, each roller is attached to this pressure frame, and an even downward biasing force is applied to the pressure frame.
There is a method in which each roller is provided with an even rolling edge (Japanese Patent Application Laid-Open No. 152555/1983).

In a vertical crusher equipped with such a pressure frame, a means for applying and holding the pressure frame in a direction opposite to the table rotation direction is required.

Conventionally, this has been achieved by installing tension rods or compression rods between the pressure frame and the casing.

[Problems to be Solved by the Invention] However, the pressure frame must be held movable up and down in order to adjust the distance between the roller circumferential surface and the table surface.
When such a tension rod or compression rod is used, a member or mechanism is required at the attachment part of the rod to enable the pressure frame to move vertically, and the vertical position of the pressure frame can be adjusted. It wasn't always easy.

[Means for Solving the Problems] The present invention provides a vertical crusher in which rollers are connected by a pressure frame, in which a leaf spring is provided protrudingly on one of the inner surface of the casing and the outer surface of the pressure frame, and a protrusion is provided on the other. The pressure frame is locked to the casing by engaging the protrusion with the leaf spring.

[Function] In the present invention, the pressure frame is locked to the casing by the engagement of the protrusion of the pressure frame or the casing with the leaf spring of the casing or the pressure frame, so the pressure frame is vertically disposed relative to the casing. The vertical position of the pressure frame can be easily adjusted because the movement is not restricted.

[Example] Fig. 1 and Fig. 2 show an embodiment of a vertical crusher according to the present invention, Fig. 1 is a schematic vertical cross-sectional view of the whole, and Fig. 2 is a cross-sectional view taken along the line II-II of Fig. 1. FIG.

In these figures, the crusher 1 is equipped with a casing 20 that houses the entire crushed product, such as a rotary table 3 to be described later, and this casing 20 includes a lower casing 20a formed in a cylindrical shape and fixed to the floor surface. , a middle casing 20b having an inner cone 20c with a circular cross-section drawn in the middle, and an upper casing 20 joined to the upper end of the middle casing 20b.
It is equipped with d.

A reducer 2 with a motor is disposed in the center of the lower casing 20a, and a rotary table 3 formed in a disc shape is attached to the output shaft facing upward. It is driven and rotates clockwise when viewed from -F in FIG. A plurality of roller boss arms 5 are arranged at the upper outer peripheral end of the rotary table 3, and each of the roller boss arms 5 has a conical head-mounted crushing roller 4 pivotally attached to its lower end, which is pivoted in a substantially horizontal state. ing.

A pressure frame 6 having an annular shape (an annular shape in this embodiment) is fixed to the upper surface of the upper inner peripheral end of the roller boss arm 5 by means such as bolt tightening, and a plurality of crushing rollers 4 and a roller The boss arm 5 and the pressure frame 6 are integrally formed and mounted on the upper surface of the rotary table 3. On the other hand, the upper outer peripheral end of each roller boss 5 is rotatably connected to a connecting rod 8 and a turnbuckle 9 by a pin 7 and a fork end 7a.
and the hydraulic cylinder 1 via the cylinder rod 10a.
0, and the lower end of the hydraulic cylinder 10 is connected to the rotating pin 11.
and is connected to a base plate 13 by a rotating seat 12.

Each crushing roller 4 is connected to a roller boss 5 via a roller shaft 4a.
The rotary table 3 is rotatably supported by a shaft, and its circumferential surface is in contact with the outer peripheral surface of the upper end of the rotary table 3, so that it can be rotated in accordance with the rotation of the rotary table.

On the other hand, above the center of the rotary table 3 is a raw material supply pipe 1.
6 to the upper casing 2 via the final refined powder discharge pipe 22.
The separator 15, which is formed of an inverted conical cylinder, is supported by the middle casing 20b by a stay (not shown) around the raw material supply pipe 16. A plurality of movable vanes 15a are arranged evenly in the circumferential direction on the outer circumferential upper surface of the upper end of the separator 15 for applying swirling force to the incoming dust gas, and a shaft 15b and a handle are supported at one end by a bearing 15c. 15
d, it can be rotated and adjusted from the outside.

Furthermore, a duct 18 is provided below the outer periphery of the rotary table 3.
An annular hot air passage 21 is provided which is connected to the hot air generator by a hot air generator.
An annular space 14 is defined by the outer circumferential wall 14b.

This annular space 14 includes a plurality of plate-shaped blades 14c.
are arranged and fixed at equal intervals around the circumference while maintaining a required inclination angle with respect to the horizontal plane.

In addition, at the bottom of the hot air passage, there is a discharge chute 1 that temporarily discharges foreign objects during crushing and excess crushed materials in the event of overload.
9 is installed and can be taken out from a discharge door 19b which is rotatable around a rotation pin 19a.

Therefore, the casing 20 (in this embodiment, the internal cone 2
A leaf spring of 17° C. is fixed to the inner surface of 4) at the same level as the pressure frame 6. Further, a protrusion 17k having a length that can be engaged with the leaf spring 17J2 is provided on the outer circumferential surface of the pressure frame 6 in a protruding manner. As shown in FIG. 2, the leaf spring 17J2 and the protrusion 17 are installed at a plurality of locations (three locations in this embodiment) equally spaced in the circumferential direction. The pressure frame 6 is locked to the casing 1 by each projection 17k being locked to the leaf spring 171.

The operation of the crusher configured as above will be explained next.

After starting the reducer 2 with a motor to rotate the rotary table 3, the material to be crushed is supplied from the supply pipe 16 to the center of the upper surface of the rotary table 3 while maintaining airtightness by a conveyor such as a conveyor (not shown). Then, due to the rotation of the rotary table 3 and the centrifugal force of the rotation, the object to be crushed draws a spiral trajectory and is pushed toward the outer periphery of the rotary table 3. Since the crushing roller 4 is rotating on the outer periphery of the rotary table 3,
Most of the object to be crushed is caught between the crushing roller 4 and the rotary table 3, and is crushed into fine powder by compression, impact, and shearing action. This fine powder, coarse particles and intermediate particles that are not bitten by the crushing roller 4 and come off the periphery of the rotary table 3 fall into the annular space 14, but are then sent through the duct 18 by the hot air generator. Since the hot air blows up from the hot air passage 21 to the annular space 14,
These fine powders and intermediate particles rise inside the mill along with the hot air. The fine powder and intermediate particles that have risen are removed by the separator 15.
and the inner cone 20c of the casing, changes its course direction horizontally near the top of the upper casing 20d, and flows in a spiral along the set inclination of the movable vane 15a.

In this way, the fine powder, which has been classified by the centrifugal classification action of the separator and has reached the desired fine particle size, is sent to the next step via the discharge pipe 22. On the other hand, coarse powder that does not reach the fine particle size slides down the inner surface of the separator and accumulates near the flap 15f whose upper end is rotatably supported on the skirt 15e fixed to the side wall of the supply pipe 16, and due to the action of gravity. While pushing this flap 15f away, it slides down the inner surface of the lower chute 15g and falls onto the upper surface of the rotary table 3.

As the table 3 rotates, the force in the table rotation direction applied to the pressure frame 6 via the crushing roller is counteracted by the engagement of the leaf spring 17j2 and the protrusion 17, and the pressure frame 6 is prevented from engaging. A stop is made.

In addition, because of this locking method, once the rotary table 3 is stopped, the pressure frame 6 can be closed without any special operation.
The vertical position can be easily adjusted.

Of course, after this adjustment is completed, the crusher can be operated by simply rotating the rotary table 3 again.

In addition, since the protrusion 17k contacts the leaf spring 17Il in this manner, the effect that the contact between the pressure frame 6 and the casing 1 side when the pressure frame 6 is locked is M21 is achieved.

In the above embodiment, the type of separator is a fixed movable vane type centrifugal type, but a rotor type rotating type may be adopted. In addition, the rotary table liner is not a flat type,
The grinding roller may be of an inclined type or a dish type, and the corresponding crushing roller may be changed to a type that is compatible with these types.

[Effects of the Invention] As is clear from the above description, the present invention locks a pressure frame in a vertical crusher by engagement of a protrusion and a leaf spring, and the pressure frame Adjustment can be performed extremely easily, and effects such as reduction in equipment configuration cost and ease of maintenance management of the vertical crusher can be obtained. Furthermore, contact between the pressure frame side and the casing side is buffered, and vibrations and the like are also reduced.

[Brief explanation of drawings]

FIG. 1 is a general sectional view showing an embodiment of a vertical crusher according to the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 1. 1... Vertical crusher, 3... Rotary table,
4... Grinding roller, 6... Pressure frame, 14...
・Annular space part, 17k...Protrusion, 17J2・
...Plate spring. Figure 1

Claims (1)

[Claims] In a crusher that includes a rotary table in a casing, a plurality of crushing rollers arranged on the rotary table, and a pressure frame that connects the plurality of crushing rollers to each other, one of the inner surface of the casing and the outer surface of the pressure frame. A vertical crusher characterized in that a plate spring is provided protrudingly on one side and a protrusion is provided on the other side, and the protrusion is engaged with the plate spring to lock the pressure frame to the casing.