JPH0144099B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for automatically controlling the operation of a crusher for crushing solid lumps.

[Conventional technology] Conventionally, aluminum cans, chips of copper, aluminum, etc. that have been solidified by pressing, or solidified materials such as asphalt and concrete waste materials, have been crushed into small pieces using a crusher etc. in order to make effective use of them. It was designed to be broken down into pieces. As a crusher for crushing the above-mentioned solid lumps, for example, the one described in Japanese Patent Application Laid-open No. 102454/1983 is known.

[Problem that the invention seeks to solve]

However, the conventional crusher described above has a problem in that it is not possible to obtain a jammed state by swinging the crushing plate continuously or intermittently.

The present invention solves such conventional problems, and aims to provide an excellent automatic operation control method for a crusher that can avoid a decrease in processing capacity due to poor clogging in the crushing chamber. That is.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides an automatic operation control method for a crusher in which a hydraulic mechanism generates or stops the swinging motion of a crushing plate depending on the crushing status of solid lumps. The level of solid matter in the crushing chamber of the crusher is detected and used as a variable for the crushing situation, and the level is compared with a set value to generate or stop the rocking motion.

[Effect]

The present invention has the following effects due to the above configuration. That is, the rocking motion of the crushing plate of the crusher is controlled to be generated or stopped by a hydraulic mechanism. When the crushing plate is adjusted to have a required crushing gap between it and the rotor and the rocking movement is stopped, and the rotor is rotated, the solidified material is supplied to the crusher, and then the crushed material is crushed. Crushing progresses with retention in the room, and the biting action between the rotor and the crushing plate is also prevented, and the solids are discharged from the crusher at a constant discharge speed, and the solids are divided into size fine particles. It will be disintegrated along with it.

Next, if solid lumps with properties and shapes that obstruct the crushing operation are mixed and fed to the crusher, the progress of crushing in the crushing chamber will be delayed, and the biting action will be poor, resulting in discharge. As the speed decreases, the amount of retention in the crushing chamber increases, leading to an increase in the level of solids. Under such crushing conditions, the level of the solids in the crushing chamber is detected based on the high level setting value and the low level setting value, which are representative of the respective levels near the entrance and exit of the crushing chamber. When the high level set value is reached, the hydraulic mechanism is activated to generate a rocking motion of the crushing plate, and the crushing teeth of the rotor bite into the new surface of the solid mass, causing it to shatter downward at the same time. A pushing force is generated, and the solids are caught between the rotor and the crushing plate, and when the crushing plate approaches (advances), the solids apply strong pressure to the rotor and the crushing plate. At the same time, the crushing teeth of the rotor bite into the solid mass. As the crushing plates approach and move away from each other, the solid mass is caught between the rotor and the crushing plate, and is crushed and discharged together with size fine particles by the shearing and bending crushing of both crushing teeth.

In addition, if the solidified material is discharged from the crushing chamber after completion of crushing, or if it is discharged from the crushing chamber at a high discharge rate, the level of the solidified material below the low level setting value is detected. Then, when the hydraulic mechanism is activated and the swinging motion of the crushing plate is stopped, the crushing plate and the rotor engage in a biting action under the crushing conditions in the predetermined crushing gap, and the crushing will continue.

Therefore, it is possible to reliably grasp changes in the crushing status of solid lumps, and to adjust the start or stop of the rocking motion according to the level of the solid lumps, thereby preventing jamming in the crushing chamber. The crushing is carried out under sufficient shearing and bending force to ensure that the size is finely divided, and even if there are variations in the shape and properties of the solid lumps, a reduction in processing capacity can be avoided. The crushing function can be significantly improved.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention.

In FIG. 1, 10 indicates the main parts of the crusher, 1 is a rotor equipped with crushing teeth, 2 is a crushing plate equipped with crushing teeth that mesh with the crushing teeth, and crushing plate 2 can swing toward and away from the rotor 1 using the shaft 9 as a fulcrum. S is a crushing gap formed when the crushing plate 2 approaches the rotor 1. A crushing chamber 8 is formed by the rotor 1 and the crushing plate 2, and the solid lumps are crushed within this crushing chamber 8. Reference numeral 5 denotes a hydraulic cylinder, which is connected to the lower end of the crushing plate 2 and connected to the hydraulic mechanism 4 through a hydraulic system 4a, and 4b is a pressure gauge for detecting the oil pressure of the hydraulic system 4a. H is a level set near the entrance of the crushing chamber 8 of the crusher 10, and is a high level setting value for automatic operation control, and similarly, L is a level set near the exit of the crushing chamber 8. It is considered a low-level setting value for automatic driving control. Reference numeral 21 designates a solid mass level detection device, from which level signals 22 and 23 at positions corresponding to the above-mentioned high level H and low level L are output. The level detecting device 21 uses an ultrasonic type or the like, and is designed to be able to cope with the state of crushing solid lumps without any trouble. Reference numeral 7 indicates a control circuit, into which signals including a hydraulic signal 4c and level signals 22 and 23 are input, and the operation of the hydraulic mechanism 4 is controlled by an output signal 11 of the control circuit 7.

Next, the operation of the above embodiment will be explained.

The rocking motion of the crushing plate 2 of the crusher 10 is controlled by a hydraulic mechanism 4.
It is regulated to start or stop depending on the situation. The crushing plate 2 is adjusted to have a required crushing gap S between it and the rotor 1 and its rocking motion is stopped, and the rotor 1 is rotated to supply the solids to the crusher 10. Then, the crushing progresses in the crushing chamber 8 with stagnation, and the biting action between the rotor 1 and the crushing plate 2 also occurs, and the crusher continues to move at a constant discharge speed. 10, and the solid mass is sized and crushed.

Next, if solid lumps having properties and shapes that obstruct the crushing operation are mixed and supplied to the crusher 10, the progress of crushing in the crushing chamber 8 will be delayed, and the biting action will be poor. As the discharge rate decreases, the amount of stagnation in the crushing chamber increases, leading to an increase in the level of solids. Under such crushing conditions, when the level detection device 21 detects the level of the solids in the crushing chamber 8 and the level is equal to or higher than the high level H setting value, the level signal 22 is sent via the control circuit 7. actuates the hydraulic mechanism 4 to generate a rocking motion of the crushing plate 2, increasing the biting action and rapidly discharging it from the crusher 10 at an increased discharge speed,
The increase in retention amount as described above is avoided.

In addition, if the solid lumps have been completely crushed and are discharged from the crushing chamber 8, or if they are discharged from the crushing chamber 8 at a high discharge speed, the amount remaining in the crushing chamber 8 will be eliminated. or decrease leading to a decrease in the level of solids. Under such crushing conditions, the level detection device 21 detects the level of solids in the crushing chamber 8, and if the level is below the low level L setting value, the level signal 23 is sent via the control circuit 7. When the hydraulic mechanism 4 is activated to stop the swinging motion of the crushing plate 2, the crushing action returns to the biting action under a predetermined crushing condition and is ejected from the crushing chamber 8 and crushed.
Moreover, when the amount of retention is exhausted, the rotor 1 and the crushing plate 2 are operated in an idle state.

Next, the amount of stagnation in the crushing chamber 8 shows an increasing tendency, and the control circuit 7 detects the level of the solids and rises above the low level L set value, and further increases until it reaches the high level H set value. By this operation, the hydraulic mechanism 4 is fixed at a predetermined position and the rocking motion of the crushing plate 2 is continued to be stopped, and the solid lumps are well bitten by the rotor 1 and the crushing plate 2 in the crushing chamber 8. Disintegrated under action.

In addition, the solidified material in the crushing chamber 8 starts to show a decreasing trend from staying at a level higher than the high level H set value, and falls below the high level H set value.
Furthermore, until it descends and reaches the low level L setting value, the hydraulic mechanism 4 continues to generate the rocking motion of the crushing plate 2 due to the operation of the control circuit 7, and the solids are moved to the rotor in the crushing chamber 8. 1 and the crushing plate 2 under good biting action.

Therefore, it is possible to reliably grasp changes in the state of crushing the solid lumps, and to adjust the start or stop of the rocking motion according to the level of the solid lumps. The crushing is carried out under sufficient shearing and bending force to ensure bite, and even if the shape and properties of the solid mass change, abnormal conditions may occur due to a decrease in processing capacity. can be avoided, and the function of the crushing action can be significantly improved.

Note that the embodiments of the present invention are not limited to the above embodiments, and various embodiments such as rocking motion, rocking motion, and adjustment of the crushing gap can be adopted.

〔Effect of the invention〕

As is clear from the above embodiments, the present invention makes it possible to reliably grasp the fluctuations in the state of crushing of solid lumps, suppress excessive retention of solid lumps in the crushing chamber, and thereby ensure sufficient chewing. The crushing condition is adjusted and the crushing is carried out, and even if the shape and properties of the solid lumps change, it is possible to avoid the occurrence of abnormal conditions due to a decrease in processing capacity, and the function of the crushing action is significantly improved. The effects are enormous.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of an automatic operation control method for a crusher according to an embodiment of the present invention. 2...Crushing plate, 4...Hydraulic mechanism, 8...Crushing chamber, 10
...Crusher, H...High level, L...Low level.

Claims (1)

[Claims] 1 An automatic crusher that has a crushing chamber consisting of a crushing plate that meshes with a rotor, and generates or stops the swinging motion of the crushing plate by a hydraulic mechanism to crush solid objects in the crushing chamber. An operation control method, in which the level of the solidified material is detected by a level detection device during the process of crushing the solidified material in a crushing chamber, and this level signal is input to a control circuit to set the level to a high level. When the level is above the low level set value, the rocking motion is generated, and when the level is below the low level set value, the rocking motion is stopped, and the level falls below the high level set value and becomes the low level set value. The automatic crusher is characterized by continuing to generate the rocking motion until the level reaches a low level set value, and continuously controlling the stop of the rocking motion until the level rises above a low level set value and reaches a high level set value. how to drive.