JP3460066B2 - Method and apparatus for automatically adjusting crushing gap of impact 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 method and apparatus for automatically adjusting a crushing clearance of an impact crusher, and more particularly, to a tip of a striking plate provided on the outer periphery of a horizontal rotor and a crushing gap which can be moved toward and away from the rotor. The present invention relates to a method and a device for automatically adjusting a crushing gap of an impact type crusher that automatically adjusts a crushing gap formed between the collision plate and the lower end of the collision plate.

[0002]

2. Description of the Related Art Conventionally, as an automatic adjusting method and apparatus for this type of impact crusher, a method and apparatus for automatically adjusting the crushing gap of a crusher described in Japanese Patent No. 2928327 are known. This method and apparatus, while rotating a rotor provided with a striking plate, brings the lower end of the collision plate close to the rotor, detects the sound generated at the time of contact between the lower end of the collision plate and the tip of the striking plate by a microphone, and After the contact is detected, the lower end of the collision plate is separated from the rotor, and the gap between the lower end of the collision plate and the tip of the striking plate is adjusted to a desired size.

[0003]

However, in the conventional method and apparatus for automatically adjusting the crushing clearance of the impact type crusher, it is necessary to bring the impact plate into contact with the striking plate of the rotating rotor. As a result, the rotational movement of the rotor and the movement of the collision plate interfere with each other, resulting in damage to the striking plate and / or the collision plate.

Therefore, an object of the present invention is to provide an automatic crushing gap adjusting method and device for an impact crusher which can be carried out without causing damage to the striking plate and / or the collision plate.

[0005]

In order to solve the above problems, an automatic crushing clearance adjusting method for an impact crusher according to the present invention comprises:
In a method of automatically adjusting a crushing gap formed between a tip of a striking plate provided on the outer periphery of a horizontal rotor and a lower end of a collision plate provided so as to be able to approach and separate from the rotor, while the rotor is idling The rotation position is detected, and the rotor is stopped at a position where the tip of the striking plate can contact the lower end of the collision plate, and then the lower end of the collision plate is brought closer to the rotor, and the lower end of the collision plate and the tip of the striking plate are separated. When the contact is detected, the movement of the lower end of the collision plate is stopped, and this condition is set to the crushing clearance value of 0. Immediately separating the lower end of the collision plate from the rotor, the moving distance is measured as the crushing clearance value to determine the crushing clearance. It is characterized in that the movement of the lower end of the collision plate is stopped when the value reaches a desired size.

On the other hand, the crushing gap automatic adjusting device of the impact type crusher is formed between the tip of the striking plate provided on the outer periphery of the horizontal rotor and the lower end of the collision plate provided so as to approach and separate from the rotor. In the device for automatically adjusting the crushing gap, a rotational position detector that detects the rotational position of the rotor, a contact detector that detects contact between the lower end of the collision plate and the tip of the striking plate, and the lower end of the collision plate. And the tip of the striking plate contact the crushing gap value zero, the gap value measuring device for measuring the moving distance of the lower end of the collision plate separating from the tip of the striking plate as the crushing gap value, and from the rotational position detector After stopping the idling rotor at the desired rotation position by inputting the rotation position signal of the, the lower end of the collision plate is brought closer to the rotor, and the contact signal from the contact detector is input to the lower end of the collision plate. Stop moving, and Immediately after setting the crushing gap value to zero, the lower end of the collision plate is separated from the rotor, and when the crushing gap value reaches a desired value by inputting a measurement signal from the gap value measuring device, And a controller for controlling the rotation of the rotor and the movement of the lower end of the collision plate so as to stop the movement.

[0007]

In the method and apparatus for automatically adjusting the crushing clearance of the impact crusher, the crushing clearance is automatically adjusted while the rotation of the rotor is stopped.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an example of an embodiment of an automatic crush clearance adjusting device for an impact crusher according to the present invention. In the figure, reference numeral 1 denotes a rotor horizontally installed in a casing (not shown). The rotor 1 includes a rotor shaft 2 that is normally and reversely rotated by a rotation drive device (not shown).
A plurality of regular polygons (regular hexagons in FIG. 1) attached to the rotor shaft 2 at equal intervals (only one is shown in FIG. 1)
Of the rotor plate 3 and a plurality of (six in FIG. 1) striking plates 4 radially attached to the outer peripheral corners of the rotor plate 3 so as to be able to be turned upside down. Is provided with a rotational position detector (not shown) such as a rotary encoder for detecting the rotational angle θ of the rotor 1 to detect the rotational position of the rotor 1.

The upper and lower portions on both sides of the rotor 1 have their upper ends axially attached to the casing via pins 5 parallel to the rotor shaft 2, and are hydraulic pressures installed outside the casing as collision plate moving devices. A collision plate 7 whose lower end is provided so as to be able to approach and separate from the rotor 1 via a cylinder 6 and which is curved by denting the surface facing the rotor 1 in an arc shape.
(Only the lower part on the right side is shown in FIG. 1) are arranged symmetrically, and a crushing chamber is formed between the rotor 1 and each collision plate 7. In the hydraulic oil conduit 9 that connects the hydraulic cylinder 6 and the hydraulic unit 8 that drives it, the pressure of the hydraulic oil when driving the hydraulic cylinder 6 so that the lower end of the collision plate 7 approaches the rotor 1 is monitored. Then, as shown in FIG. 1, the lower end of the collision plate 7 and the striking plate 4 are contacted with the lower end of the striking plate 4 to increase the hydraulic pressure.
A pressure detector 10 as a contact detector for detecting contact with the tip of the is inserted. Further, in the hydraulic cylinder 6, the state where the lower end of the collision plate 7 and the tip of the striking plate 4 are in contact with each other is set to a crushing gap value of zero, and the moving distance of the lower end of the collision plate 7 which separates from the tip of the striking plate 4 is set to the crushing gap. A gap value measuring device 11 such as a laser sensor for measuring the protruding length of the piston rod 6a is additionally provided to measure the value as a value.

Reference numeral 12 is a control device for controlling the rotation of the rotor 1 and the movement of the lower end of the collision plate 7. The control device 12 receives the rotation position signal RP from the rotation position detector and is idling. To the desired rotational position, that is, the collision plate 7
In order to stop the rotor 1 at a position where the lower end of the rotor and the tip of any striking plate 4 can contact, the rotation control signal RC is output to the rotation drive device to control the rotation of the rotor 1 to stop the rotation. After that, the hydraulic cylinder 6 is moved forward and the collision plate 7 is moved.
The lower end of the pressure sensor 10 approaches the rotor 1 and the pressure detector 10
From the lower end of the collision plate 7, that is, the forward movement of the hydraulic cylinder 6 is stopped, and
Immediately after the crush gap value is set to zero, the hydraulic cylinder 6 is immediately moved back to move the lower end of the collision plate 7 away from the rotor 1, and the measurement signal M from the gap value measuring device 11 is input to determine the crush gap value. When the desired size is reached, the operation control signal OC is output to the hydraulic unit 8 so as to stop the movement of the lower end of the collision plate 7, that is, the returning movement of the hydraulic cylinder 6, and drive the hydraulic cylinder 6, that is, The movement of the lower end of the collision plate 7 is controlled.

The automatic adjustment of the crushing gap by the crushing gap automatic adjusting device of the impact type crusher having the above-mentioned structure is performed in a state where the supply of the object to be crushed is stopped and the rotor 1 is idly rotated. When the rotation position signal RP from the rotation position detector that detects the position is input to the control device 12, the control device 12 outputs the rotation control signal RC to the rotation drive device,
The rotation of the rotor 1 is stopped so that the tip of the arbitrary striking plate 4 comes into contact with the desired lower end of the collision plate 7. Next, the operation control signal OC is output from the control device 12 to the hydraulic unit 8 so that the hydraulic cylinder 6 is driven so as to move forward, and the lower end of the collision plate 7 is brought close to the rotor 1. When the contact between the lower end of the collision plate 7 and the tip of the striking plate 4 is detected by the pressure detection device 10 and the contact signal T is input to the control device 12, the forward movement of the hydraulic cylinder 6 is stopped, Moreover, in this state, the crushing clearance value is set to zero, and the hydraulic cylinder 6 is immediately moved back to move the collision plate 7
While separating the lower end of the rotor 1 from the rotor 1, the measurement signal M from the gap value measuring device 11 for measuring the moving distance as the crushing gap value is input, and when the crushing gap value reaches a desired value, the hydraulic cylinder 6 And the movement of the lower end of the collision plate 7 is stopped.

In the above-described embodiment, the pressure detector 10 detects the contact between the lower end of the collision plate 7 and the tip of the striking plate 4 and the increase in the hydraulic pressure when the hydraulic cylinder 6 moves forward.
However, the present invention is not limited to this, and the rotation of the rotor shaft 2 due to the reaction force at the time of contact between the lower end of the collision plate 7 and the tip of the striking plate 4 is rotated by the rotational position detector. May be detected by detecting the fluctuation of The movement of the lower end of the collision plate 7 is not limited to the reciprocating operation of the hydraulic cylinder 6, but may be performed using an electric motor and a screw transmission device. The contact with the tip of 4 may be detected using the rotational position detector as described above, or may be detected by detecting an increase in the current value or the electric power value of the electric motor at the time of contact.

[0013]

As described above, according to the method and apparatus for automatically adjusting the crushing clearance of the impact crusher of the present invention, the automatic adjustment of the crushing clearance is performed while the rotation of the rotor is stopped. This can be performed without causing damage to the plate and / or the collision plate or damage to the collision plate moving device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of an embodiment of an automatic crushing clearance adjusting device for an impact crusher according to the present invention.

[Explanation of symbols]

1 rotor 4 striking board 6 Hydraulic cylinder (collision plate moving device) 7 collision plate 10 Pressure detector (contact detector) 11 Gap measurement device 12 Control device RP rotation position signal RC rotation control signal T contact signal M measurement signal OC operation control signal

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Ami 1780 Kamitakano, Yachiyo-shi, Chiba Kawasaki Heavy Industries, Ltd. Yachiyo Factory (72) Inventor Junshiro Ohashi 1780 Uetakano, Yachiyo, Chiba Yachiyo Kawashige Engineering Co., Ltd. (56) Reference JP-A-8-266921 (JP, A) JP-A-53-24170 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B02C 13 / 00-13/31

Claims (2)

(57) [Claims] 1. A method for automatically adjusting a crushing gap formed between a tip of a striking plate provided on the outer periphery of a horizontal rotor and a lower end of a collision plate provided so as to approach and separate from the rotor, While the rotor is spinning, the rotational position is detected, the rotor is stopped at a position where the tip of the striking plate can contact the lower end of the collision plate, and then the lower end of the collision plate is brought closer to the rotor to strike the lower end of the collision plate. When the contact with the tip of the plate is detected, the movement of the lower end of the collision plate is stopped, and this condition is set to the crushing clearance value of 0. Immediately separating the lower end of the collision plate from the rotor, the moving distance is defined as the crushing clearance value. A method for automatically adjusting the crushing clearance of an impact crusher, which comprises measuring and stopping the movement of the lower end of the collision plate when the crushing clearance reaches a desired value. 2. An apparatus for automatically adjusting a crushing gap formed between a tip of a striking plate provided on the outer periphery of a horizontal rotor and a lower end of a collision plate provided so as to approach and separate from the rotor, A rotation position detector that detects the rotational position of the rotor, a contact detector that detects the contact between the lower end of the collision plate and the tip of the striking plate, and a state where the lower end of the collision plate and the tip of the striking plate are in contact with each other is crushed. The gap value is set to zero, the gap value measuring device for measuring the moving distance of the lower end of the collision plate which is separated from the tip of the striking plate as the crushing gap value, and the rotational position signal from the rotational position detector is input to idle. After the rotor is stopped at the desired rotation position, the lower end of the collision plate is brought closer to the rotor, the contact signal from the contact detector is input to stop the movement of the lower end of the collision plate, and the crush gap value is zero. After setting
Immediately move the lower end of the collision plate away from the rotor, and input the measurement signal from the gap value measuring device to rotate the rotor so that the movement of the lower end of the collision plate is stopped when the crushing gap value reaches a desired value. And a control device for controlling the movement of the lower end of the collision plate, the crushing gap automatic adjusting device for an impact crushing machine.