JP2626844B2 - Set value measuring device for rotating crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a set value measurement for detecting a minimum gap (set value) of a crushing portion of a rotary crusher for producing coarse aggregate and fine aggregate used for concrete and asphalt mixture. Related to the device.

[0002]

2. Description of the Related Art Conventionally, a mantle mounted so as to cover a pine cone-shaped head that moves up and down while rotating eccentrically about a vertical axis, and the inside of a bowl stationaryly disposed around the mantle. In the case of a rotary crusher of the type in which the raw material is crushed with a bowl liner such as a cone crusher or a gyra disc, the minimum gap formed by the mantle and the bowl liner is called a set or set value. Was adjusted to control the product size of the crusher. Before and after the adjustment of this set amount, it is necessary to know exactly what the current set value and the set value after the adjustment are. An object that easily deforms plastically, for example, a lump of lead was charged, and the dimensions of the lump after being deformed by clamping were measured.

[0003]

However, such a method is troublesome because the conventional operation has to be stopped, all raw materials have to be eliminated, and no-load operation has to be performed several times. In addition, there is a drawback that a sample of a lump used once cannot be used unless it is reworked, and thus the appearance of a simple measuring device has been desired.

[0004]

In order to solve the above-mentioned problems, a set value measuring apparatus for a rotary crusher according to the present invention comprises:
A head whose main shaft is fixed to a main frame, is fitted to the main shaft via a bearing, and rotates eccentrically with respect to a vertical axis, and a bowl whose vertical movement can be adjusted via an adjustment ring mounted on the main frame. in gyratory crusher for crushing raw materials between, with arranging a hydraulic cylinder provided with a through hole in the axial direction of the main shaft, and loading the head to the tip of the piston rod of the hydraulic cylinder, or
Up and down movement of the head with respect to the spindle
A movable push-up fitting is attached, and a position detector for detecting the elevation of the piston rod of the hydraulic cylinder is connected to the piston of the hydraulic cylinder.

[0005]

According to the present invention, when it is necessary to detect the set value, if hydraulic oil is supplied to the hydraulic silling provided in the through hole of the main shaft in the direction in which the piston rod extends, the tip end of the piston rod is The push-up bracket lifts the head, and the mantle outside the head comes into contact with the bowl liner and comes to rest. The set value between the mantle and the bowl liner can be calculated by reading the moving distance during this time with a position detector directly connected to the hydraulic cylinder. After the set value is detected, the pressure oil of the hydraulic cylinder is slowly released,
The head gently lands in its original condition.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of a set value measuring device of a rotary crusher according to the present invention, and FIG.
FIG. 2 is a longitudinal sectional view showing another embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a rotary crusher, 2 denotes a main frame,
A vertical main shaft 4 is erected. A cylindrical eccentric 5, which is somewhat eccentric from the center axis, is fitted to the upper half of the main shaft 4 via an eccentric bush 6, and furthermore, a pine cone through a head bush 7.
A head 8 is fitted. The outside of the head 8 is also covered with a pine cone-shaped mantle 9, and the raw material is crushed between the mantle 9 and a bowl liner 21 described later. On the lower end surface of the eccentric 5, the entire load of the eccentric 5, the head 8 and the mantle 9 rotating between the pair of upper and lower thrust bearings 18 and the lower thrust bearing 19 and the compressive load during the crushing movement are transmitted to the main frame 2. At the same time, the head ball 16 sits on the spherical seat 17 at the upper end of the main shaft 4 to promote smooth rotation. A gear 10 composed of a bevel gear is fixedly mounted on the outer periphery of the lower end of the eccentric 5, is driven to rotate by a V pulley (not shown), and is eccentric through a pinion 11 of a bevel gear at the tip of a horizontal rotating shaft 12 which is supported by a bearing 13. 5 is driven to rotate. Reference numeral 15 denotes a feed plate, which distributes the raw material supplied to the hopper 23 equally around the circumference.

On the other hand, an adjustment ring 22 is mounted on the upper end surface of the main frame 2 via a tapered surface, and is constantly pulled downward through a release cylinder (not shown) to be in close contact with the main frame 2. A right-hand taper screw is screwed on the inner peripheral surface of the adjustment ring 22 and is screwed with a bowl 20 having a right-hand taper screw also screwed on the outer periphery. The rotation of the bowl 20 allows the bowl 20 to move up and down. Be composed. Also, to lock the screwing of the adjustment ring 22 and the bowl 20 during operation,
Similarly, a clamp ring 22a screwed on the inner peripheral surface is mounted on the adjustment ring 22, a piston rod is fastened to the adjustment ring 22, and a cylinder is fixed to the clamp ring 22a. By projecting the piston rod of the cylinder 24 by hydraulic pressure, a strong force is applied to the contact surfaces of the two screws.

A bowl liner 21 is fixed inside the bowl 20 and forms a crushing chamber with the mantle 9. An adjustment cap 40 is fixedly mounted on the outer periphery of the upper end of the bowl 20 with a stud.

Next, the set value measuring device will be described. As shown in the figure, a through-hole penetrating in the axial direction is formed in the main shaft 4, and a hydraulic cylinder 50 is housed at the lower end of the main shaft 4. The piston rod 50b of the hydraulic cylinder 50 is fastened to the piston 50a, extends upward, and is connected to a slider 53 that slides in a guide tube 52 provided at the upper end of the main shaft 4. Further, a connecting rod 54 extends upward on the upper surface of the slider 53 and is connected to a push-up fitting 55. Then, pressure oil is supplied from the hydraulic unit from the lower end of the hydraulic cylinder 50 via the hydraulic pipe 4a. 4b is a lubricating oil supply pipe. A position detector 60 is fixed to the lower end surface of the hydraulic cylinder 50, and the position detector 60
Mover 60a is connected to piston 50a.

The operation of the set value measuring device of the rotary crusher of the present invention configured as described above will be described. When it becomes necessary to measure the set value, pressure oil is gently supplied to the hydraulic silling 50 through the hydraulic pipe 4a. Piston 50a and piston rod 50b according to the supply of pressure oil
The slider 53 rises while sliding in the guide tube 52, and the push-up metal fitting 55 at the uppermost end rises integrally with the head 8, the mantle 9, and the head ball 16. Eventually, the mantle 9 comes into contact with the bowl liner 21, and the distance that has risen during this time can be detected by the position detector 60.

On the other hand, FIG. 2 shows another embodiment of the present invention. The difference from FIG. 1 is that the hydraulic cylinder 50 is arranged at the upper end of the main shaft 4 instead of the lower end. In this case, the guide tube 52 and the slider 53 are omitted, the piston rod 50b is directly connected to the push-up fitting 55, and the upper end flange 55a of the push-up fixture 55 and the head 8 are bolted. Therefore, the mover 60a of the position detector 60 is extended through the through hole of the
Of the piston 50a. The operation of FIG. 2 is shown in FIG.
1 and 2, the head ball 16 and the spherical seat 17 are separated from each other when the head 8 is raised in both FIGS.

[0013]

As described above, the set value measuring device of the rotary crusher according to the present invention has a hydraulic cylinder provided in a main shaft, and a head and a mantle are raised by extending a piston rod of a hydraulic syringe. Since the position change until the mantle contacts the bowl liner is detected,
The clearance between the two can be automatically and easily measured by remote control. Therefore, the set value can be easily changed, the maintainability is improved, and the product size can be arbitrarily controlled, so that the product quality can be made uniform and the production efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rotary crusher showing one embodiment of the present invention.

FIG. 2 is a vertical sectional view of a main part of a rotary crusher showing another embodiment of the present invention.

[Description of Signs] 1 Rotating crusher 2 Main frame 3 Boss 4 Main shaft 4a Hydraulic pipe 4b Lubricating oil supply pipe 5 Eccentric 6 Eccentric bush 7 Head bush 8 Head 9 Mantle 10 Gear 11 Pinion 12 Rotary shaft 13 Bearing 15 Feed plate 16 Head Ball 17 Spherical Seat 18 Upper Thrust Bearing 19 Lower Thrust Bearing 20 Bowl 21 Bowl Liner 22 Adjustment Ring 22a Clamping Ring 23 Hopper 24 Clamping Cylinder 40 Adjustment Cap 50 Hydraulic Cylinder 50a Piston 50b Piston Rod 52 Guide Pipe 53 Slider 54 Connecting rod 55 Push-up fitting 60 Position detector 60a Mover

Claims (1)

(57) [Claims] 1. A main shaft is fixed to a main frame. The head is fitted on the main shaft via a bearing and rotates eccentrically with respect to a vertical axis. An adjustment ring mounted on the main frame is used to move the main shaft up and down. In a rotary crusher for crushing a raw material between a movable adjustable bowl and a hydraulic cylinder, a through-hole is provided in an axial direction of the main shaft, a hydraulic cylinder is provided , and the head is attached to a tip of a piston rod of the hydraulic cylinder. And the head is moved up and down with respect to the spindle.
A set value measuring device for a rotary crusher in which a push-up fitting capable of moving up and down in a vertical direction is attached and a position detector for detecting the elevation of a piston rod of the hydraulic cylinder is connected to a piston of the hydraulic cylinder.