JPS61107949A - Regulator for granular form of ground material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a grinding member such as an oscillating grinding plate for a primary crushed material that has been subjected to a normal crushing action by a show crusher, a cone crusher, etc. This invention relates to an improvement in a grinding material particle shape adjusting device for producing ground material having a particle shape close to the natural particle shape of construction aggregate, etc. by applying a grinding action to adjust particle size and particle shape.

(Prior art and its problems) Conventional compression type crushers such as show crushers and cone crushers have a pair of crushing members facing each other, and by swinging one or both of the crushing members, the gap between the crushing members can be reduced. By periodically expanding and contracting the crushing gap, the crushed material introduced into the crushing gap from above is compressed and crushed to a size smaller than the exit gap, and the produced crushed material particles are quickly released by gravity from the outlet gap below. It is configured to be discharged.

For this reason, the filling rate of the material to be crushed into the crushing gap is basically low, and the state in which the material to be crushed is inserted into the crushing gap is in a single-layer formation filling and feeding state. Grinding actions such as abrasion, compression, and crushing virtually never occur, and as a result, most of the particles are flat or length-shaped along the crushing gap (and the raw materials are coarsely crushed, This method has the disadvantage of producing irregularly shaped fragments with many sharp points due to secondary crushing.

Therefore, when this type of produced crushed material is used, for example, as concrete aggregate, due to the influence of its particle shape, the amount of water and cement must be increased to make concrete that has the same strength as concrete using natural particle aggregate. It is not recommended to use the crushed material produced in this way as a final product such as construction aggregate because it may be necessary to do so, or water may rise to the surface during curing, which may cause problems with the seed line. Can not.

The grinding material particle shape adjusting device described in Japanese Patent Publication No. 58-26975 filed by the present applicant, which was developed to deal with such problems, has a pair of grinding members facing each other, and the grinding By swinging one or both of the members, the grinding gap between the grinding members is intermittently expanded and contracted, and a member called an adjustment face piece is provided at an angle at a position that closes the outlet of the grinding gap. A ground material discharge gap is formed extending laterally and connected to the outlet of the grinding gap.

FIG. 2 shows the structure of the main part of an example of the crushed material particle shape adjusting device. In the figure, reference numerals 1 and 2 are a pair of grinding members facing each other, and the space between the grinding members 1 and 2 is a grinding gap B.

In this example, the grinding member 1 is fixed, and the grinding member 2 swings as shown by the arrow, so that the grinding gap B is periodically expanded and contracted. Reference numeral 3 denotes an adjustment face piece provided at an angle to close the outlet C of the grinding gap B, and this adjustment face piece 3 forms a grinding material discharge gap that extends laterally and continues to the outlet C. . In this example, the inclination angle θ of the adjustment face piece 6 is variable.

In the thus configured crushed material particle shape adjusting device, when the primary crushed material, which has been crushed by a show crusher or the like, is supplied from the upper inlet A, it is ground in the grinding gap B, and the crushed material passes through the outlet C. , and is discharged from the discharge gap via the adjustment face piece 6.

In this process, since the adjustment face piece 3 is in a position that closes the outlet C, the ground material is not discharged immediately, but accumulates there, and the accumulation extends into the grinding gap B, causing the grinding Gap B will be filled with ground material. When the grinding gap B is expanded or contracted in a state where it is filled with ground materials, the ground materials are rubbed and compressed against each other.

The weak points of the ground material are crushed by the grinding action such as crushing, and flat, length-measuring particles, and sharp pointed protrusions are ground preferentially, thereby adjusting the particle shape.

Discharge of the ground material is performed intermittently from a side discharge gap connected to the outlet C.

In this manner, the ground material particle shape adjusting device accumulates the ground material in the grinding gap B by the action of the adjustment face piece 3.

The grain shape is adjusted by filling the gap, and if the adjusting face piece 3 is variable as in the example shown, the outlet C of the grinding gap B can be kept in the optimal closed state by adjusting the inclination angle θ of the adjusting face piece B. This allows for the most preferable grain shape adjustment. Furthermore, since the above-mentioned grinding is mainly performed between particles, there is extremely little wear and tear on the grinding members, and maintenance costs are low.

However, when this crushed material particle shape adjustment device attempts to process a primary crushed material that contains a large amount of moisture and mud, the crushed surfaces of the grinding members 1 and 2 will have mud and fine particles generated by the grinding. There was a problem in that the amount of ground material passing through the outlet C of the grinding gap B was extremely small due to the adhesion of particles, and the amount of grinding processing per unit time was significantly reduced.Moreover, the grinding material particle shape adjustment device In order for the grinding gap B to exhibit the above-mentioned effect, it is essential that the grinding gap B is always filled with the primary crushed material, and keeping the filled state constant allows for constant particle shape adjustment. Therefore, the operating rate is poor (,
It was extremely difficult to obtain a consistent product.

(Purpose of the Invention) The present invention has been made to solve the above problem, and when processing primary crushed material containing a large amount of water and mud, it is possible to avoid mud and polishing on the grinding surface of the grinding member. The grinding action is performed in such a way that the fine particles generated by crushing do not adhere to the grinding gap, and the amount of crushed material passing through the outlet of the grinding gap is adjusted, and the grinding gap is always filled with primary crushed materials. At the same time, the time and amount of the primary crushed material being crushed in the grinding gap are adjusted so that the crushed material with a certain range of particle shapes can be constantly produced, and the amount of time consumed for grinding the secondary crushed material is adjusted. It is an object of the present invention to provide a grinding material particle shape adjusting device that can keep the electric power of the motor substantially constant.

(Structure of the Invention) The grinding material particle shape adjusting device of the present invention is based on the above-mentioned Japanese Patent Publication No. 58-2
The basic configuration is the grinding material particle shape adjusting device described in Publication No. 6975, that is, by providing a displaceable adjustment face at the outlet of the grinding gap formed by a pair of opposing grinding members, the grinding material can be discharged. By delaying and stagnation, the grinding gap is filled with the material to be ground, and the particles are rubbed and compressed against each other.

The particle shape is adjusted by a grinding action such as crushing as in the conventional method.

The grinding material particle shape adjusting device of the present invention further includes a sprinkler disposed above the entrance of the grinding gap for sprinkling water into the grinding gap,
A control device is connected to the sprinkler, and a detection device is provided at the outlet of the grinding gap to detect the amount of the ground material passing through. A sprinkler sprinkles water into the grinding gap, and a detector for detecting the power consumption of the motor that swings the grinding member and an adjusting face piece control device for controlling the displacement of the adjusting face piece are provided. is operated by a detection signal of the power consumption of the motor by a detector, and the displacement of the adjustment face piece is controlled so that the grinding action is performed with a certain amount of material to be ground filled in the grinding gap, and a constant It is possible to constantly produce ground products with a particle size within a range, and the electric power of the motor consumed for grinding the material to be ground is kept approximately constant.

(Example) An example of the crushed material particle shape adjusting device of the present invention will be described with reference to FIG. Since the same reference numerals in the figure as in FIG. 2 indicate the same parts, the explanation thereof will be omitted. 4 is a motor for swinging the grinding member, and 5 is a detector for detecting the power consumption of the motor 4.

Reference numeral 6 denotes a fulcrum of the adjustment face 3, and the adjustment face 3 swings vertically around this fulcrum 6 by driving a cylinder 7 whose one end is connected to the fixed grinding member 1. This hydraulic device 8 is a hydraulic device that drives the cylinder 7 and is operated by an adjustment facepiece control device 9.

The adjustment face piece control device 9 is adapted to operate based on a detection signal of the power consumption of the septa 4 by the detector 5. Entrance A of the grinding gap B between the pair of grinding members 1 and 2 facing each other
A sprinkler 10 is provided above the sprinkler 10, and a control device 11 for adjusting the amount of water sprinkled is connected to the sprinkler 10. A detection device 12 for detecting the amount of passed ground material is provided at the outlet C of the grinding gap B, and the control device 11 is operated in accordance with the amount detected by the detection device 12. The sprinkler 10 is configured, for example, by making holes in a pipe at regular intervals so that water is uniformly sprinkled in the width direction of the grinding interval B. 13 is a feeder provided above the grinding interval B for feeding the material to be ground.

In the embodiment configured as described above, the material to be ground from the feeder 13, that is, the primary crushed material containing a large amount of water and mud, is fed from the inlet A into the grinding gap B (filled and fixed grinding When the grinding members 2 and K, which are oscillated by the member 1 and the motor 4, perform a grinding action and water is sprinkled into the grinding gap B from the sprinkler 10, mud and abrasive particles are deposited on the grinding surfaces of the grinding members 1 and 2. It is possible to grind the primary crushed material without adhering fine particles generated by crushing, and the amount of crushed material passing through the outlet C of the grinding gap B is small (no amount of crushed material passing through the outlet C is detected by the detection device 12 at the exit C). The amount of ground material passing through the outlet C is detected, and the control device 11 is operated according to this detected amount to adjust the amount of water sprayed from the sprinkler 10, so that the amount of ground material passing through the outlet C is maintained within a certain range. can.

However, in the grinding action of this primary crushed material, the power consumption of the motor 4 that swings one of the grinding members 2 is detected by the detector 5, and the detection signal is sent to the adjustment face piece control device 9. The adjustment facepiece control device 9 operates according to the detection signal, that is, according to the power consumption of the motor 4, the hydraulic device 8 is operated, the cylinder 7 is operated, and the adjustment facepiece 6 is rotated upward or downward to discharge. The amount of ground material discharged from the gap is regulated. As a result, the particle shape of the primary crushed material ground within the grinding gap B falls within a substantially constant range, and the electric power consumed by the motor 4 to grind this becomes substantially constant.

(Effects of the Invention) As can be seen from the above explanation, the crushed material particle shape adjusting device of the present invention is capable of controlling the size of the crushed material by sprinkling water from a sprinkler when the primary crushed material containing a large amount of water and mud is ground. Since mud and fine particles generated by grinding do not adhere to the grinding surface of the grinding surface, grinding is performed effectively and the amount of ground material passing through the outlet of the grinding gap does not decrease. Further, since the amount of ground material passing through the outlet of the grinding gap is detected and the amount of water sprinkled by the sprinkler is adjusted accordingly, the amount of ground material passing through the outlet is maintained within a certain range.

In addition, since the adjustment face piece control device is operated by the detection signal of the power consumption of the motor that swings the grinding member to control the displacement of the adjustment face piece, the amount discharged from the discharge gap of the grinding material is adjusted, and therefore the grinding material is Grinding can be done while the gap is filled with a certain amount of primary crushed material, and the time and amount of grinding are adjusted.
- The particle shape of the crushed product is within a substantially constant range, and the electric power of the motor consumed to grind the crushed product can be kept substantially constant.

In this way, the mutual abrasion, compression, and crushing action of the particles during the grinding of the primary crushed material containing a large amount of water and mud is kept constant, the amount of grinding processed per unit time is significantly increased, and the grinding efficiency is improved. This has the excellent effect of increasing the productivity of the ground material.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the grinding material particle shape adjusting device of the present invention, and FIG. 2 is a vertical sectional view schematically showing a conventional ground material particle shape adjusting device. 1.2... Grinding member 5... Adjustment face piece 4... Motor 5... Detector 6... Fulcrum 7... Cylinder 8... Hydraulic device 9... Adjustment face piece control device 10
...Sprinkler 11...Control device 12...
Grinding material passing amount detection device 13...Feeder A...
Inlet of grinding gap B...Grinding gap C...Outlet of grinding gap D...Grind material discharge gap

Claims (1)

[Claims] At least one of the pair of grinding members facing each other is made swingable so that the grinding gap can be varied, and the outlet is opened and closed relative to the outlet of the grinding gap, and the grinding member is connected to the outlet. In the grinding material particle shape adjusting device, the grinding material particle shape adjusting device is provided with a displaceable adjustment surface that forms a discharge gap on the side, a sprinkler for sprinkling water into the grinding gap is provided above the entrance of the grinding gap, and the sprinkler is provided with a sprinkler for sprinkling water into the grinding gap. A control device is connected to the grinding gap, and a detection device for detecting the amount of passed ground material is provided at the outlet of the grinding gap, and the control device is operated in accordance with the detected amount of the passed amount of ground material;
Further, an adjusting face piece control device for controlling displacement of the adjusting face piece is provided, a power consumption detector is provided for detecting power consumption of a motor that swings the grinding member, and a detection signal of the power consumption of the motor is provided by the detector. A grinding material particle shape adjusting device characterized in that the adjusting face piece control device is operated by: