JPH04106632U - Vertical crusher - Google Patents

Abstract

(57) [Summary] [Purpose] To level out the wear by minimizing the uneven wear of the grinding rollers in a vertical crusher, and even if uneven wear occurs, by replacing only the roller tires in the unevenly worn parts. , achieving a reduction in running costs. [Structure] A truncated conical roller tire 4a that fits onto a truncated conical boss 4b is divided into two in the axial direction, and a first roller tire 4j made of wear-resistant cast iron is disposed on the larger diameter side. However, a second roller tire 4k made of carbon steel or wear-resistant cast steel is fitted onto the first roller tire 4j on the small diameter side.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention works with a rotary table and a crushing roller to crush limestone and cement raw materials. , vertical pulverizer for pulverizing raw materials such as coal, blast furnace slag, cement clinker, and chemicals. Regarding vertical crushers with crushing rollers that are particularly suitable for materials that are subject to severe wear. Ru.

0002

[Conventional technology]

Grinding that finely grinds raw materials such as limestone, blast furnace slag, and cement raw materials into powder. As a type of machine, as shown in Fig. 3, there is a vertical type machine equipped with a rotary table and crushing rollers. The crusher 1 is widely used. This type of crusher is constructed under the cylindrical casing 1a. In the section, a disk-shaped rotating shaft is driven by a motor 2A with a reducer 2 and rotates at a low speed. cable 3A and the part that equally divides the outer periphery of its upper surface in the circumferential direction is pressed by hydraulic pressure etc. The grinding roller 4 is provided with a plurality of grinding rollers 4 that rotate as a result of rotation.

0003 The crushing roller 4 has an arm 5 pivotally supported by a shaft 6 on the casing 1a. is connected to the piston rod 10 of the hydraulic cylinder 9 via the arm 7, and the oil By operating the pressure sill 9, the crushing roller 4 is pushed onto the rotary table 3A. This applies crushing pressure to the raw material. 3B is provided on the outer periphery of the rotary table 3A. Dam ring 14 is for blowing up gas around rotary table 3A. 15 is a hot air blowing passage, 13 is a raw material crushed by a blade 13A. 16 is a discharge port for taking out the product together with the gas, 17 is the raw material This is the feed chute.

0004 In such a vertical crusher, a raw material input shoe is placed in the center of the rotary table 3A. The raw material supplied at step 17 is moved in the radial direction of the table by the rotation of the rotary table 3A. When sliding on the rotary table 3A due to centrifugal force, the rotary table 3A determines the rotation direction. The rotation speed of the rotary table 3A decreases due to the force of Do some slow rotation. The above two forces, namely radial and rotational forces are synthesized, and the raw materials draw a spiral trajectory on the rotary table 3A. Move to the outer periphery of 3A. A roller is pressed against this outer periphery and rotates. Then, the raw material with the spiral line is transferred between the crushing roller 4 and the rotary table 3A in the axial direction of the roller. It enters from a direction that makes an angle with the direction of the object and is bitten and crushed.

[0005] On the other hand, a duct is provided at the base of the casing 1a to supply gas such as air or hot air. The gas is guided to the outer peripheral surface of the rotary table 3A and the inner peripheral surface of the casing. The crushed fine powder becomes a gas by blowing up from the annular space passage 14 between the The blades of the separator 13 located at the top rise inside the casing 1a accompanied by the blades of the separator 13. 13A, and products with a predetermined particle size are discharged from the discharge port 16 along with the gas. and sent to the next process.

[0006] Further, the crushing roller 4 has a truncated cone-shaped roller tire 4, as shown in FIG. a is also fitted onto the truncated cone-shaped boss, and in the state shown in Fig. 3, the rotating shaft is The raw material interposed between the two is crushed by applying strong pressure to the raw material facing the cable 3A.

[0007]

[Problem that the idea aims to solve]

However, blast furnace slag, cement clinker, hard ceramic raw materials, etc. The pulverized raw materials not only cause severe wear on the pulverizing rollers, but also cause the rotary table to The large diameter side of the roller tire 4a located near the outer circumference of the tire 3A is selectively and violently worn. , causing a worn part X as shown in FIG. Leave this condition and continue driving. If this continues, the roller tire 4a will eventually break, and the pieces will scatter and spread to other roller tires. can become lodged one after another, causing serious equipment damage. Therefore, such uneven wear occurs. If this occurs, immediately stop driving and replace with new roller tires, or replace the tires with new ones. Otherwise, the worn parts must be repaired, resulting in significant economic losses. It was something.

[0008]

[Means to solve the problem] In order to solve the above problems, the vertical crusher of the present invention has Multiple rotatable crushing rollers are placed on the top surface, and raw materials are fed into the center of the rotary table. The raw material supplied via the chute is applied to the crushing roller with a predetermined crushing pressure and then rotated through the rotating machine. In a vertical crusher that grinds between the top surface of the cable and the circumferential surface of the crushing roller, the crushing roller The roller has a truncated conical boss and a truncated conical roller tie that is fitted onto the boss. The roller tire is divided into two parts in the axial direction, and the large diameter side is made of wear-resistant cast iron. A first roller tire made of carbon steel or wear-resistant cast steel is installed on the small diameter side. A second roller tire was fitted to the first roller tire.

[0009]

[Effect]

The roller tire of the crushing roller of the vertical crusher of this invention has a truncated cone-shaped boss. A first roller tire and a second roller tire, which are divided into two parts in the axial direction, are each fitted on the outside. The large diameter side, where wear is especially severe, is made of wear-resistant cast material with a high degree of wear resistance. Carbon steel or wear-resistant cast steel is used on the small diameter side, where the progress of wear is relatively slight. Because it has an externally fitted structure, the crushing roller can be In addition to leveling out the progress of wear in the axial direction and prolonging the life, it also reduces uneven wear on the large diameter side. It is economical and easy to run, as you only need to replace the first roller tire when it wears out. This can contribute to the reduction of administrative costs.

0010

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figures 1 and 2 are of the present invention. Regarding the example, Figure 1 is a longitudinal cross-sectional view of the crushing roller, and Figure 2 shows the wear status of the crushing roller. FIG.

[0011] In the figure, the crushing roller 4 has a truncated conical boss 4b and a truncated conical boss 4b. It is constructed by fitting a roller tire 4a of a shape on the outside. The roller tire 4a has two wheels in the axial direction. The first roller tire 4j is divided into parts, and the large diameter side is made of wear-resistant cast iron, and the small diameter side is made of wear-resistant cast iron. The figure shows a second roller tire 4k made of carbon steel or wear-resistant cast steel. They are fitted and connected via stepped parts. The first roller tire 4j includes For example, FCW6 (high chromium white pig iron cast iron) and FCW5L (hard white pig iron cast iron) ) etc., which are highly hard and have a Hs (shore height) of 50 to 70 can be used. On the other hand, The roller tires 4k in No. 2 are made of ordinary SS material, carbon steel such as SC46, or SCMnC. Manganese chromium steel castings such as r2A can be used.

0012 The vertical crusher 1 having the crushing rollers 4 formed in this way can achieve relatively high abrasion. Roller tires 4, which originally perform the main role of crushing work even when crushing raw materials that are subject to heavy wear On the large diameter side of a, there is a first roller made of a harder and more wear-resistant material than on the small diameter side. Since the flat tire 4j is installed, the uneven wear that is conventional is reduced and the wear becomes even. standardization will be promoted. In addition, despite these measures, uneven wear on the large diameter side is still significant. If it is not possible to replace the first roller tire 4k without replacing the second roller tire 4k, This can be done by simply replacing 4j.

[0013]

[Effect of the idea]

As explained above, in the vertical crusher of the present invention, the roller roller of the crushing roller is The tire is divided into two parts in the axial direction, and the first roller tire made of wear-resistant cast iron is placed on the large diameter side, and the first roller tire made of wear-resistant cast iron is placed on the large diameter side. A second roller tire made of carbon steel or wear-resistant cast steel is arranged on the side, so By leveling out the progression of wear, it is possible to extend the life of the crushing roller tire. Also, large Even if uneven wear occurs on the diameter side, only the first roller tire on the large diameter side needs to be replaced. It is economical and can help reduce running costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a crushing roller showing an embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view showing the state of wear of a crushing roller according to an embodiment of the present invention.

FIG. 3 is an overall vertical sectional view showing an example of a conventional vertical crusher.

FIG. 4 is a longitudinal sectional view showing an example of a conventional crushing roller.

FIG. 5 is a longitudinal cross-sectional view showing the state of wear of a conventional crushing roller.

[Explanation of symbols]

1 Vertical crusher 2 Reducer 2A electric motor 3A rotary table 4 Grinding roller 4a Roller tire 4b boss 4j First roller tire 4k second roller tire X Worn part

Claims (1)

[Scope of utility model registration request] [Claim 1] A plurality of rotatable crushing rollers are arranged on the upper surface of the outer periphery of a rotary table, and a predetermined crushing pressure is applied to the raw material supplied to the center of the rotary table via a raw material input chute to the crushing rollers. In a vertical crusher that grinds between an upper surface of a rotary table and a peripheral surface of a crushing roller, the crushing roller includes a truncated conical boss and a truncated conical roller tire fitted onto the boss, The roller tire is divided into two parts in the axial direction, with a first roller tire made of wear-resistant cast iron arranged on the larger diameter side, and a second roller tire made of carbon steel or wear-resistant cast iron arranged on the smaller diameter side. 1. A vertical crusher characterized in that the crusher is disposed so as to fit into the roller tire of No. 1.