JPH08141419A - Centrifugal crusher and reinforcement for crushed raw material feeding port - Google Patents

Abstract

PURPOSE: To expand the diameter of a feeding route to improve crushing efficiency by making a feeding port in the center part of a top board of a crushing chamber and fitting an upper reinforcement to the peripheral edge part of the feeding port and also fitting a lower reinforcement adjacent to the upper reinforcement to the upper end of a feeding port arranged in the center part of an upper disc of a rotor. CONSTITUTION: In a centrifugal crusher for crushing a raw material such as a mineral, the material to be crushed is discharged from a peripheral surface opening of a rotor 2 horizontally rotating installed in the center part of a crushing chamber 11 toward an impact member provided on the peripheral edge part of the crushing chamber 11 and is crushed. In this case, feeding ports are arranged in the center part of a top board 13 of the crushing chamber 11 and in the center part of an upper disc of the rotor 2 respecitively so that their center axes may be arranged in a straight line. In the arranged feeding ports, an annular upper reinforcement 5 and a tubular reinforcement 6 are fitted respectively, and the upper end of the lower reinforcement 6 is made adjacent to the upper reinforcement 5. The diameter of a feeding route of the upper reinforcement 5 is formed a little smaller than that of the lower reinforcement 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal crusher for crushing raw materials such as minerals and a reinforcing material for a crushing raw material supply port.

[0002]

2. Description of the Related Art As a device for crushing raw materials such as minerals, a centrifugal crusher as shown in FIG. 4 has been conventionally known. Briefly explaining the crusher, a crushing chamber 11 is defined in a housing 1 which is an outer shell of the crushing device, and a rotor 2 which can rotate in a horizontal direction at a high speed is arranged in the center of the crushing chamber 11. ing. Raw materials such as minerals are supplied into the rotor 2, and the centrifugal force generated by the rotation of the rotor 2 causes
It is tangentially discharged from a discharge port 21 formed on the peripheral surface of the rotor 2. Then, the discharged raw material is made to collide with the dead bed 12 formed of the crushed pieces of the raw material accumulated annularly in the crushing chamber 11 or a steel anvil (not shown) to perform the crushing. FIG. 5 shows the structure of the supply path for supplying the crushing raw material into the rotor 2 in the centrifugal crusher having the above structure. In the center of the top plate 13 of the crushing chamber, a box-shaped shunt 3 for taking in the crushing raw material from the outside is erected. Then, in the central portion of the top plate 13 and the central portion of the rotor upper disc 22 in the shoe 3, the supply port 1 is provided.
4 and 23 are opened, and these are penetrated to feed pipe 4
Is attached. This feed pipe 4 has a flange 4 at the upper end.
It is hooked on the upper surface of the top plate 13 by 1, and the lower end portion is inserted into the rotor supply port 23. The crushing raw material supplied from the upper part of the shunt 3 is surrounded by the dead bed 3 inside the shunt 3.
No. 1 is formed and further fed through the feed pipe 4 into the rotor 2.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
There are the following problems. <B> Since the feed pipe 4 is fixed to the top plate 13,
It is necessary to provide a gap in a state where the tip portion of the feed pipe 4 and the supply port 23 of the rotor 2 are separated. Therefore, the inner diameter of the feed tube 4, that is, the diameter of the feed path for the crushing raw material is limited. One of the means to increase the crushing efficiency is to increase the supply amount. However, if the diameter of the supply path is limited as described above, the diameter cannot be expanded to increase the supply amount.

<R> Since there is a gap between the rotor supply port 23 and the feed pipe 4, the raw material supplied into the rotor 2 bounces off and the raw material is fed to the edge of the rotor supply port 23. Collide. Therefore, the peripheral portion of the rotor supply port 23 is worn, the life of the rotor 2 is shortened, and it is uneconomical.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the diameter of the crushing raw material supply passage is expanded to increase the crushing raw material supply amount to improve the crushing efficiency. Furthermore, it is an object of the present invention to provide a centrifugal crusher and a reinforcing material for a crushed raw material supply port, which can prevent abrasion of the peripheral portion of the rotor supply port due to rebound of the raw material and prolong the life of the rotor.

[0006]

According to the present invention, a crushing chamber formed in a crusher housing, a collision member provided at a peripheral portion of the crushing chamber, and a centrally located crushing chamber that rotates horizontally. A centrifugal crusher comprising a rotor for discharging the crushing raw material toward the collision member from the peripheral opening and a supply path for supplying the crushing raw material into the rotor, provided on the top plate of the crushing chamber. In addition, a supply port is opened in the center of the crushing raw material shoe and in the center of the upper disk of the rotor, and separate reinforcing members are attached to the peripheral portions of these supply ports. It is a reinforcing material for the centrifugal crusher and the crushing raw material supply port, which are characteristic features.

Embodiments of the present invention will be described below with reference to the drawings.

[Embodiment 1] <a> Opening of the supply port As shown in FIG. 2, the supply port 14 is provided at the center of the crushing chamber top plate 13 inside the shunt 3 and the center of the rotor upper disc 22, respectively. Open 23. These supply ports 14 and 23 are
Open them so that their central axes are aligned.

Further, the diameters of the supply ports 14 and 23 are formed slightly larger than the outer diameter of the fitting portion of the reinforcing material described later so that the fitting portion can be mounted. Further, the supply ports 14, 23
The size of the diameter is set in advance so that the required supply path diameter can be obtained in consideration of the thickness of the fitting portion of the reinforcing material.

<B> Attachment of Reinforcing Material An annular upper reinforcing material 5 and a tubular lower reinforcing material 6 are attached to the supply ports 14 and 23 opened as described above. Both of these reinforcing members 5 and 6 are preferably made of a material having abrasion resistance such as special high chrome.

The upper reinforcing member 5 is composed of a fitting portion 51 and a flange portion 52, and the outer diameter of the fitting portion 51 is formed to be slightly smaller than the diameter of the supply port 14 so that it can be mounted. Further, the flange portion 52 is formed to have a diameter larger than that of the supply port 14 so that the flange portion 52 can be hooked on the top plate 13 to fix the upper reinforcing member 5. The fixing method of the upper reinforcing member 5 and the lower reinforcing member 6 described below is detachably attached for replacement at the time of wear by fastening with bolts or other means.

On the other hand, the lower reinforcing member 6 comprises a fitting portion 61, a flange portion 62 and a rising portion 63, and the fitting portion 61.
The flange portion 62 is formed similarly to the upper reinforcing member 5. Further, the rising portion 63 has a height such that its upper end is close to the upper reinforcing member 5.

The internal spaces of both the reinforcing members 5 and 6 are supply paths 53a and 64 for the crushing raw material. Since it is not necessary to provide a gap inside the supply port 23, the diameter of the supply passage 64 can be expanded as compared with the case of using a conventional feed pipe, and the supply amount of the crushing raw material can be increased. it can.

The diameter of the supply passage 53a for the upper reinforcing member 5 is set to be slightly smaller than the diameter of the supply passage 64 for the lower reinforcing member 6. This is because if the diameters of the two supply paths 53a and 64 are equal to each other, the fine crushed raw material pieces and the like that have been supplied will cause the upper reinforcing material 5
This is for preventing it from being caught in the gap between the lower end surface of the and the upper end surface of the lower reinforcing member 6.

<C> Separation Structure of Crusher Head As shown in FIG. 1, the crusher heads of the crushing chamber top plate 13 and above are configured to be separable from the main body. For example, a structure in which the top plate 13 and the side wall 15 of the crushing chamber 11 are separable from each other and the top plate 13 and the side wall 15 are connected by a fixing device 16 is conceivable. Although various fixing devices can be considered, for example, one in which one end of the pin 16a is pivotally supported on the side wall 15 and the fastening jig 16b is attached to the other end is used.
Then, the pin 16 is provided in the notch 17 provided in the peripheral portion of the top plate 13.
a is fitted, and the upper surface of the top plate 13 is fastened by the fastening jig 16b to fix the top. The above is the characteristic of the centrifugal crusher of the present invention, and the other structure is the same as the conventional one.

[0015]

[Operation of Embodiment 1] <a> Crushing operation When the crushing operation is performed, the rotor 2 is rotated and the crushing raw material is put into the shunt 3. The charged crushing raw material is deposited on the peripheral portion inside the shoe 3 to form a dead bed 31, and then passes through the upper reinforcing material 5 and the lower reinforcing material 6 to be blown.
Dead bed 12 around the rotor 2 supplied to the rotor 2.
It is released toward and crushed.

<B> Inspection of the crushing chamber To inspect the crushing chamber, it is necessary to remove the crusher head. To remove the crusher head, first of all, the fixing device 1
Loosen the tightening jig 16b of No. 6 and tilt the pin 16a,
The connection between 3 and the side wall 15 is released. The crusher head can then be raised slightly and slid horizontally.

[0017]

[Embodiment 2] The inner peripheral surface of the upper reinforcing member 5 of the first embodiment is upright. As shown in FIG. 3, the inner peripheral surface 54 of the upper reinforcing member 5 is directed from the lower end to the upper end. In some cases, the supply path 53b is formed by gradually expanding the supply path 53b.

In the first embodiment, the lower reinforcing member has a tubular shape, but an annular lower reinforcing member 7 as shown in FIG. 3 can be used. The lower reinforcing material 7 is a fitting portion 7
1 and the flange portion 72, the outer diameter of the fitting portion 71 is formed slightly smaller than the diameter of the supply port 23 so that the fitting portion 71 can be mounted. The flange portion 72 is formed to have a diameter larger than that of the supply port 23, and is hooked on the upper disc 22 of the rotor 2 so that the lower reinforcing member 7 can be fixed.

Further, the inner peripheral surface 73 of the lower reinforcing member 7 is formed by gradually expanding from the upper end toward the lower end, and its internal space serves as a crushing raw material supply passage 74. The diameter of the supply passage 74 is
Since it is not necessary to provide a gap inside the supply port 23, the diameter can be expanded as compared with the case of using a conventional feed tube, and the supply amount of the crushing raw material can be increased.

Further, as in the first embodiment, the diameter of the supply passage 53 for the upper reinforcing member 5 is made slightly smaller than the diameter of the supply passage 74 for the lower reinforcing member 7. This is the supply path 5 for both
This is because if the diameters of 3 and 74 are equal, the crushed raw material that has passed through the inside of the upper reinforcing member 5 may hit the inner edge portion of the flange portion 72 of the lower reinforcing member 7 and jump out to the outside, so that it is prevented.

[0021]

Operation of Embodiment 2 As shown in FIG. 3, the crushed raw material pieces supplied form dead beds 8 even along the partition walls of the rotor 2. However, since the dead bed 8 becomes viscous when it contains a large amount of moisture, a bulging portion 81 is formed in the central portion of the rotor 2, which reduces the supply amount of the crushing raw material or the inside of the rotor 2. It may lead to blockage.

However, in the case of this embodiment, the upper reinforcing member 5
Since the inner peripheral surface 54 of the rotor gradually expands from the lower end to the upper end, the crushed raw material passes along the dead bed 31 and the inner peripheral surface 54, and passes through the outermost side away from the center of the rotor 2. And will fall. Further, since the inner peripheral surface 73 of the lower reinforcing member 7 is expanded from the upper side to the lower side, the supplied crushing raw materials collide with each other and spread while being spread by the rotor 2.
It is supplied to the outside of the center of the maximum distance. Therefore,
The bulging portion 81 of the dead bed 8 due to the supplied crushing raw material
Since it is always scraped off, it is possible to prevent the bulging portion 81 from being generated. Moreover, since the crushed raw material is supplied while being spread, the supply amount can be increased.

However, when the inner peripheral surface of the upper reinforcing member 5 is upright, the dead bed 31 is formed up to the position of the corner a in the figure, so that the crushing raw material is directed toward the central portion of the rotor 2. If the inner peripheral surface b of the lower reinforcing member 7 is upright, the crushed raw materials are not spread even if they collide with each other, so that they are supplied to the central portion of the rotor 2. Therefore, the bulging portion 81 of the dead bed 8 cannot be scraped off by the supplied crushing raw material. Moreover, since the supply path is narrow, the supply amount of the crushing raw material is reduced.

[0024]

[Third Embodiment] The inner peripheral surface of the upper reinforcing member 5 of the first embodiment may be gradually expanded from the lower end to the upper end as in the second embodiment, or the tubular lower reinforcing member of the first embodiment. The inner surface of 6
It may be formed by gradually expanding from the upper end toward the lower end as in the second embodiment.

[0025]

[Embodiment 4] Upper reinforcing member 5 and lower reinforcing member 7 of Embodiment 2.
The inner peripheral surfaces of may be formed to have the same diameter from the upper end to the lower end without being expanded.

[0026]

Since the present invention has been described above, the following effects can be obtained. <A> The present invention has a structure in which the lower reinforcing member is directly attached to the peripheral portion of the rotor supply port based on the idea of separating the conventional feed pipe into upper and lower parts. Therefore, as in the past,
It is no longer necessary to provide a gap between the feed port and the feed pipe. Therefore, the diameter of the crushing raw material supply path can be expanded by the amount that does not require a gap, the crushing raw material supply amount can be increased, and the crushing efficiency can be improved.

<R> Since there is no gap between the rotor supply port and the feed tube, the raw material does not collide with the edge of the rotor supply port due to the rebound of the raw material. Therefore,
Since it is possible to prevent wear of the peripheral portion of the rotor supply port and prolong the life of the rotor, it is economical.

<C> When the lower reinforcing material is formed in a tubular shape and the upper end thereof is brought close to the upper reinforcing material, the crushing raw material blown up from the rotor is small because the gap between the upper and lower reinforcing materials is small. It is possible to prevent dust and small pieces from scattering outside through the gap. Therefore, dust and small pieces are not clogged between the top plate and the rotor upper surface, and the cause of machine failure can be reduced.

<D> When the inner peripheral surface of the upper reinforcing member is gradually expanded from the lower end to the upper end, the crushed raw material passes through the outermost portion farthest from the central portion of the rotor and falls. The crushed raw material can scrape off the bulging portion of the dead bed to prevent the bulging portion from occurring. Therefore, it is possible to ensure the supply of a certain amount of the crushed raw material into the rotor.

<E> When the inner peripheral surface of the lower reinforcing member is gradually expanded from the upper end to the lower end, the crushed raw materials are collided and spread while being supplied to the outermost side farthest from the central portion of the rotor. Therefore, the crushed raw material can scrape off the bulging portion of the dead bed to prevent the bulging portion from occurring. Therefore, it is possible to ensure the supply of a certain amount of the crushed raw material into the rotor.

<F> In addition, while the crushed raw material spreads,
Since it is supplied into the server, the supply amount can be increased.

<G> Since the reinforcements are separated vertically, and the top reinforcement is annular and short, the inspection of the crushing chamber can be performed by simply raising the crusher head in the horizontal direction. The work of separating the crusher head is facilitated because it is slid to the bottom.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of the overall structure of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part of the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a second embodiment of the present invention.

FIG. 4 is an explanatory view of the entire structure of a conventional centrifugal crusher.

FIG. 5 is an explanatory view of a raw material supply structure of a conventional centrifugal crusher.

Claims (17)

[Claims] 1. A crushing chamber formed in a crusher housing, a collision member provided at a peripheral portion of the crushing chamber, and a crushing raw material located in a central portion of the crushing chamber and rotated in a horizontal direction to open a crushing raw material at a peripheral opening. In a centrifugal crusher consisting of a rotor that discharges more toward the collision member and a supply path that supplies the crushing raw material into the rotor, a supply port is opened in the central portion of the top plate of the crushing chamber, An annular upper reinforcing member is attached to the peripheral portion of the supply port, a supply port is opened in the center of the upper disc of the rotor, and the upper end of the supply port is a tubular body whose upper end is close to the upper reinforcing member. Centrifugal crusher characterized by being configured with a lower reinforcement. 2. A crushing chamber formed in a crusher housing, a collision member provided at a peripheral portion of the crushing chamber, and a crushing raw material located at a central portion of the crushing chamber and rotated in a horizontal direction to open a crushing raw material at a peripheral opening. In a centrifugal crusher consisting of a rotor that discharges more toward the collision member and a supply path that supplies the crushing raw material into the rotor, a supply port is opened in the central portion of the top plate of the crushing chamber, An annular upper reinforcing member is attached to the peripheral portion of the supply port, a supply port is opened in the center of the upper disc of the rotor, and an annular lower reinforcing member is attached to the peripheral portion of the supply port. Centrifugal crusher characterized by having done. 3. The centrifugal crusher according to claim 1, wherein the inner peripheral surface of the upper reinforcing member is gradually expanded from the lower end toward the upper end. . 4. The centrifugal crusher according to any one of claims 1 to 3, wherein the inner peripheral surface of the lower reinforcement is gradually expanded from the upper end toward the lower end. Centrifugal crusher. 5. The centrifugal crusher according to claim 1, wherein the inner diameter of the lower end portion of the upper reinforcing member is smaller than the inner diameter of the lower reinforcing member. Crushing machine. 6. The centrifugal crusher according to any one of claims 1 to 5, wherein the upper reinforcing member is detachably attached to a supply port of the top plate. 7. The centrifugal crusher according to any one of claims 1 to 6, wherein the lower reinforcing member is detachably attached to a supply port of the rotor upper disc. Machine. 8. The centrifugal crusher according to any one of claims 1 to 7, wherein a flange portion is formed on an outer peripheral surface of the upper reinforcing member, and the flange portion is hooked on an upper surface of the top plate and mounted. A centrifugal crusher characterized by being configured to. 9. The centrifugal crusher according to any one of claims 1 to 8, wherein a flange portion is formed on an outer peripheral surface of the lower reinforcing member, and the flange portion is hooked on an upper surface of the rotor upper disc. A centrifugal crusher characterized by being configured to be stopped and mounted. 10. The centrifugal crusher according to claim 1, wherein the upper reinforcing member is made of a special high chromium. 11. The centrifugal crusher according to any one of claims 1 to 10, wherein the lower reinforcing material is a special high-speed crusher.
Centrifugal crusher, characterized by comprising 12. The centrifugal crusher according to any one of claims 1 to 11, wherein the crusher head of the top plate or more is configured to be separable from the crusher main body. 13. A member for reinforcing a feed port for crushing raw material, which is opened in a central portion of an upper disk of a rotor of a centrifugal crusher, and is formed in a tubular shape so as to be attachable to a peripheral portion of the feed port. Reinforcing material for the crushing raw material supply port, which is characterized in that 14. A member for reinforcing a feed port for crushing raw material, which is opened in a central portion of a rotor upper disk of a centrifugal crusher, and is formed in an annular shape so as to be attachable to a peripheral portion of the feed port. Characteristic, reinforcing material for crushing material supply port. 15. The crushing material supply port reinforcing member according to claim 13 or 14, wherein the inner peripheral surface of the reinforcing member is formed by gradually expanding from the upper end toward the lower end. Reinforcement material for raw material supply port. 16. A member for reinforcing a supply port for crushing raw material, which is opened in a central portion of a top plate of a crushing chamber of a centrifugal crusher, and is formed in an annular shape so that it can be mounted on a peripheral portion of the supply port. Reinforcing material for the crushing material supply port. 17. The crushing raw material supply according to claim 16, wherein the reinforcing material is formed by gradually expanding an inner peripheral surface of the reinforcing material from a lower end to an upper end. Mouth reinforcement.