JPH01215351A - Method and device for preventing packing phenomenon in sand-making cone crusher - Google Patents

Abstract

PURPOSE:To efficiently crush raw material and to prevent the packing phenomenon due to the caking of the raw material by injecting a pressure fluid into the crushing chamber in a sand-making crusher to forcedly fluidize the raw material in the crushing chamber. CONSTITUTION:Plural pressure fluid nozzles 22 opened to the inside of the crushing chamber 10 are provided along the inner peripheral wall surface of a concave 11 in the sand-making cone crusher 1. A pressure fluid is injected into the crushing chamber 10 from the nozzles 22 to forcedly fluidize the raw material G in the chamber 10. As a result, even when a raw material having a high content of water is used, the flocculation of the raw material due to compression is released each time, cracking is efficiently performed, the product is smoothly discharged by the injected fluid, and hence the packing phenomenon due to the caking of raw material can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for preventing the packing phenomenon that occurs when producing crushed sand using a cone crusher for sand making.

(Prior technology) - Conventionally, crushed sand has been produced in Japan mainly using rod mills, ball mills, impact brakes, hammer mills, etc. However, they required a large amount of power, were difficult to maintain, produced strong vibrations and noise, and required a large installation space, among other problems.

On the other hand, the production method of crushed sand using a cone crusher for sand making does not have the above-mentioned problems.
It has spread widely throughout the world, including in the United States, where it was developed. □This production method of crushed sand using a cone crusher for sand making M is to keep the discharge part of the crushing chamber in the cone crusher for sand making D at a constant opening (C outlet gap setting or setting), and to In this method, crushed sand is produced by crushing and pulverizing raw materials such as ore under choke feet (a supply method in which the crushing chamber is filled with raw materials).

This method is generally called layer crushing or interparticle crushing, and the raw materials are pulverized and
Fine pulverization is performed. Since this production method has high production efficiency and good grain shape, it can be said to be the most excellent method for producing crushed sand.

(Issue 8 to be solved by the invention) However, in the conventional production method of crushed sand using a cone crusher for sand making, by intentionally and forcibly filling the crushing chamber with raw materials, the gaps between the raw materials are The major advantage is that the material is kept as low as possible to increase the grinding efficiency, so the raw material must be dry, and if the water content of the material is high, a packing phenomenon will occur, making it impossible to crush and discharge. There was a problem with becoming.

In other words, when the moisture content of the raw material is high, water enters or aggregates between the raw materials (particles), resulting in a state where there are no voids in the crushing chamber, and the interparticle moisture between the M materials It is thought that the flowability of the material is inhibited by the close contact between the materials, and the movement of the raw material within the crushing chamber is stopped, making it impossible to crush and discharge the raw material.

Then, the raw material in the lower part of the crushing chamber is dehydrated and becomes cake-like, and the water floats to the upper part of the crushing chamber. As this condition progresses, the caked raw material becomes solid. This state is generally referred to as the "packing phenomenon" or "packing", and this phenomenon causes the crushing and pulverization to become impossible. It becomes impossible to lower and feed the raw material, and further solidification progresses due to the compression and impact effects applied to the raw material, eventually resulting in an overload condition and the machine stopping.

Therefore, in humid regions like our country with a lot of rainfall, storage layers are needed to keep raw materials dry at all times.
Alternatively, drying equipment, fuel, etc. are required for forced drying, which poses a problem in that it is difficult to be profitable in terms of cost.

(Means for Solving the Problems) The present invention was made to solve the problems of the conventional method as described above, and its purpose is to prevent the occurrence of packing phenomenon and reduce the moisture content. The purpose of the present invention is to provide a method and device for preventing the packing phenomenon in a cone crusher for sand making, which enables smooth crushing and discharge of even large amounts of raw materials. By injecting pressurized fluid into the crushing chamber of a cone crusher, the raw material in the crushing chamber is forcibly made to flow. In addition, it was constructed with multiple pressure fluid injection ports opening into the crushing chamber.

(Function) As mentioned above, in the packing phenomenon prevention method of the present invention, the raw material in the crushing chamber is forced to flow by injecting the pressure fluid into the crushing chamber. Even though.

The agglomeration of raw materials due to compression is released each time, crushing is performed efficiently, and discharge is performed smoothly by the supplied fluid, so that the packing phenomenon caused by solidification of raw materials can be prevented.

Furthermore, in the packing phenomenon prevention device of the present invention.

As mentioned above, by providing a plurality of pressurized fluid injection ports that open toward the crushing chamber along the inner circumferential wall surface of the concape, even if the raw material has a high moisture content, as in the case of the above method, In addition to preventing the packing phenomenon caused by the solidification of raw materials, this device in particular has a pressurized fluid injection port along the inner peripheral wall of the fixed side of the concape above the crushing chamber, which enables pressurized fluid injection. The cone crusher is less likely to get clogged, and the structure of the cone crusher makes piping and maintenance inspections easier.

In addition, by increasing or decreasing the pressure and injection amount of the pressurized fluid injected into the crushing chamber from the pressurized fluid injection port, the discharge speed of the crushed material can be changed, thereby controlling the production of crushed sand. .

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In this embodiment, water is used as the pressure fluid.

First, the configuration of the embodiment device will be explained.

As shown in FIGS. 1 and 2, the packing phenomenon prevention device A in a cone crusher for sand making according to this embodiment includes a pressure water injection means 2 provided in a cone crusher I for sand making, and an external It is composed of a pressure water supply means 3 provided.

Moeki pressure water injection means 2 is a cone crusher l for sand making.
In this embodiment, an annular ill 20 is constructed on the outer peripheral surface side of the concape 11, which is the mating surface of the concape 11 and the concape sheet 12, A water channel 21 is formed that passes through the inside of the concave sheet 12 in one direction from the inner peripheral surface of the concave sheet 12 facing the annular groove 20, and a water passage 21 is formed from the annular groove 20 to the inside of the concave sheet 11 at t'. A large number of pressurized water injection ports 22 that open into the crushing chamber lO are opened along the inner circumferential wall surface of the concape 11 along an isoquant line, and the concape 11
An annular groove 20 is formed on the mating surface of the concave sheet 12.
It has a structure in which an O-ring 23.23 is interposed below F with the center at the center.

A pressure hose 24 for connecting to an external pressurized water supply means 3 is connected to the upper opening side of the water channel 21.

In this embodiment, each pressure water injection port 22 has one width on the lower side of the upper crushing chamber 10a and one side on the lower side of the narrower lower crushing chamber 10b.
It is opened at a closer position.

Also, in Figure 1, 13 is the hopper, 14 is the mantle, and 15 is the hopper.
indicates the mantle core, and 16 indicates the main axis.

The pressure water supply means 3 is a means for supplying pressure water to the pressure water injection means 2, and in this embodiment, the water sucked up from the water tank 31 by the high pressure water pump 30 is adjusted to flow through the adjustment valve 32. A constant flow is supplied to the pressure hose 24 via the pressure hose 24. In the figure, 33 is a bypass circuit for flow rate adjustment, 34 is a filter, 35 is a pressure gauge, and 36 is a water meter.

Next, the operation of this embodiment will be explained.

Since this embodiment has the above configuration, the raw material G is supplied into the hopper 13 while controlling the level so that the crushing chamber IO is always filled with the raw material G.
The high-pressure water pump 30 of the pressure water supply means 3 is started, and the cone crusher 1 is operated with a constant flow rate of pressure water controlled by the locking valve 32 being supplied to the pressure water injection means 2 of the cone crusher l. The raw material G chalk-feeted into the crushing chamber 10 is moved between the mantle 14 and the concave 11 by the rotating and shaking action of the mantle 14.
Compression and release are repeated between the two, and at the time of compression, interparticle crushing of the raw material G is performed due to the effects of compression, collision, S rubbing, etc. between the raw materials, and at the time of release, the raw material G is discharged from the discharge port P and the raw material The raw material G in the crushing chamber 10 flows with the downward supply of G, and efficient crushing and discharge are performed by the flow action of the raw material G and repeated crushing between particles.

On the other hand, when the moisture content of the raw material G is high, as in the case of heavy-duty condensation, the moisture between the raw materials or particles collects when compressed.

Either the natural fluidity of the raw material G at the time of release is lost, or the fluidity of the raw material is forcibly maintained by the pressure water supplied to the pressure water injection means 2.

That is, the pressure water supplied to the pressure water injection means 2 is distributed to each pressure water injection port 22 via the pressure hose 24 and the water channel 21 and via the annular groove 20.
2 into the crushing chamber 10, the raw material G that aggregated during compression is also forcibly dispersed by the pressure of this pressure water as the crushing chamber 10 is released, ensuring its fluidity. In addition, the discharge of the crushed material is carried out smoothly by the water flow, so even if the raw material has a high water content, the crushing and discharge can be carried out efficiently without causing any packing phenomenon.

In addition, by increasing or decreasing the water pressure and volume of pressurized water,
The discharge speed of the crushed material can be changed, and thereby the production amount of crushed sand can be controlled as desired.

Although the embodiment of the present invention has been described above in detail with reference to the drawings, the specific method and the specific configuration of the members and devices used in this method are not limited to this embodiment. Changes in specific methods, changes in the design of devices, etc. within the scope of the invention are also included in the present invention.

For example, in the method of the embodiment, the pressure water is injected from the concave side, or the specific means for injecting the pressure water is arbitrary, and for example, the pressure water may be injected from the mantle side.

Further, in the embodiment, a case is shown in which water is used as the pressure fluid, but a liquid other than water or a gas such as air may be used.

(Effects of the Invention) As explained and described above, in the packing phenomenon prevention method of the present invention, the material in the crushing chamber is forced to flow by injecting pressure and fluid into the crushing chamber. Even if the raw material has a high moisture content, the raw material is compressed and the IB collection is released each time, and the crushing is carried out efficiently and the discharge is smoothly carried out by the supplied fluid, so that the raw material becomes solid. This has the effect of being able to prevent the bucking phenomenon caused by oxidation.

In addition, in the packing phenomenon prevention device of the present invention, as described in F, a plurality of pressurized fluid injection ports opening toward the crushing chamber are provided along the inner circumferential wall surface of the concape.
As in the case of the above method, even if the raw material has a high moisture content, it is possible to prevent the packing phenomenon caused by solidification of the raw material, and
In particular, this device has a pressure fluid injection port along the inner circumferential wall of the concave, which is the fixed side above the crushing chamber, making it difficult for the pressure fluid injection port to become clogged. Due to its structure, piping and maintenance inspections can be easily performed.

In addition, by increasing or decreasing the pressure, jet, and capacity of the pressurized fluid that is injected into the crushing and crushing chamber from the pressurized fluid injection port, the discharge speed of crushed materials can be changed, thereby controlling the production amount of crushed sand. You can get effects such as becoming.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional explanatory view of a main part of a packing phenomenon prevention device according to an embodiment of the present invention, and FIG. 2 is an overall view of the same. l: Cone crusher for sand making lO: Crushing chamber l: Concape

Claims (1)

[Scope of Claims] 1) A cone crusher for sand making, characterized in that the raw material in the crushing chamber is forced to flow by injecting pressure fluid into the crushing chamber of the cone crusher for sand making. Method for preventing packing phenomenon. 2) Prevention of packing phenomenon in a cone crusher for sand making, characterized in that a plurality of pressurized fluid injection ports opening toward the crushing chamber are provided along the inner peripheral wall surface of the concave in the cone crusher for sand making. Device.