WO2021227323A1

WO2021227323A1 - Eight-roller raymond mill

Info

Publication number: WO2021227323A1
Application number: PCT/CN2020/115494
Authority: WO
Inventors: 丁庆平; 王勇; 季泉均
Original assignee: 南通利元亨机械有限公司
Priority date: 2020-05-09
Filing date: 2020-09-16
Publication date: 2021-11-18
Also published as: CN111530560B; CN111530560A

Abstract

Disclosed is an eight-roller Raymond mill. The eight-roller Raymond mill comprises a plum blossom frame (2), a main shaft (3), four first grinding roller assemblies (4) and four second grinding roller assemblies (5). The plum blossom frame (2) is provided with a main body part (21), four first mounting parts (22) and four second mounting parts (23), the main body part (21) being fixedly arranged on the main shaft (3), and the four first mounting parts (22) and the four second mounting parts (23) being alternately arranged on the main body part (21) in the circumferential direction of the main shaft (3); each of the first grinding roller assemblies (4) is provided with a first grinding roller shaft, a first grinding roller (41) and a first grinding ring (42), one end of the first grinding roller shaft being correspondingly arranged on the first mounting part (22), the other end of the first grinding roller shaft being connected to the first grinding roller (41), and the first grinding ring (42) and the first grinding roller (41) being correspondingly arranged at the bottom end of the first grinding roller shaft; and each of the second grinding roller assemblies (5) is provided with a second grinding roller shaft, a second grinding roller (51) and a second grinding ring (52), one end of the second grinding roller shaft is correspondingly arranged on the second mounting part (23), the other end of the second grinding roller shaft is connected to the second grinding roller (51), and the diameter of the second grinding roller (51) is smaller than that of the first grinding roller (41). In the eight-roller Raymond mill, the number of grinding rollers is eight, such that a grinding contact area is increased, a grinding period is shortened, and the working efficiency is improved.

Description

Eight Roller Raymond Mill

Technical field

This application relates to the technical field of pulverizers, in particular to an eight-roller Raymond mill.

Background technique

Raymond mill is a widely used grinding equipment, which is widely used in the grinding equipment of mines, cement plants and chemical plants. Because of its stable performance, strong adaptability and high cost performance, it is widely used in the processing of non-metallic minerals. . However, with the extensive development of non-metallic minerals in the field of ultrafine powder applications, downstream companies have higher requirements for the fineness of non-metallic mineral products.

In the process of realizing this application, the applicant found that the existing Raymond mill is usually a four-roll Raymond mill, and the fineness of the products it grinds is low, generally below 500 mesh, and the mechanical failure rate is high during operation. The noise is large and the overall stability is low. Therefore, these Raymond mills cannot meet the requirements of enterprises with high fineness requirements for non-metallic mineral products, causing them to only occupy the lower end of the powder application market.

Therefore, there is an urgent need for a new type of Raymond mill to meet the requirements of enterprises with higher fineness of non-metallic mineral products, so as to occupy the lower-end powder application market.

Summary of the invention

In order to solve the above-mentioned technical problems in the prior art, the embodiment of the present application provides an eight-roller Raymond mill. The specific technical solutions are as follows:

In the first aspect, an eight-roller Raymond mill is provided, which includes:

Plum blossom stand, main shaft, four first grinding roller assemblies and four second grinding roller assemblies;

The quincunx has a main body part, four first mounting parts and four second mounting parts. The main body part is fixedly arranged on the main shaft, and the four first mounting parts and four second mounting parts are arranged alternately on the main body part along the circumference of the main shaft. ；

Each first grinding roller assembly has a first grinding roller shaft, a first grinding roller and a first grinding ring. One end of the first grinding roller shaft is corresponding to the first mounting part, and the other end is connected to the first grinding roller to The first grinding roller is arranged on a plum blossom stand, and the first grinding ring and the first grinding roller are correspondingly arranged at the bottom end of the first grinding roller shaft to cooperate with the first grinding roller to grind materials;

Each second grinding roller assembly has a second grinding roller shaft, a second grinding roller and a second grinding ring. One end of the second grinding roller shaft is corresponding to the second mounting part, and the other end is connected to the second grinding roller to The second grinding roller is arranged on a plum blossom stand, and the diameter of the second grinding roller is smaller than the diameter of the first grinding roller. The second grinding ring and the second grinding roller are correspondingly arranged at the bottom end of the second grinding roller shaft so as to communicate with Match the grinding material, and the height of the second grinding ring is the same as that of the first grinding ring;

Wherein, the distance between the connection position of the first mounting part and the first grinding roller and the axis of the main shaft is less than the distance between the connection position of the second mounting part and the second grinding roller and the axis of the main shaft. The angle between the center of the roller shaft with the main shaft as the axis is 45 degrees.

In a first possible implementation manner of the first aspect, each first mounting portion includes a large-diameter connecting lug, each second mounting portion includes a small-diameter connecting lug, and the distance from the ear hole of the small-diameter connecting lug to the spindle axis is greater than The distance from the ear hole of the large-diameter connecting ear to the spindle axis.

In combination with the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, each small-diameter connecting ear and its adjacent large-diameter connecting ear are connected by an arc.

In a third possible implementation manner of the first aspect, the first grinding ring includes a first upper grinding ring and a first lower grinding ring, and the first upper grinding ring and the first lower grinding ring are arranged at the bottom end of the first grinding roller shaft , And the diameters of the first upper grinding ring and the first lower grinding ring are the same, and the sum of the heights of the first upper grinding ring and the first lower grinding ring is the same as the height of the second grinding ring.

In a fourth possible implementation manner of the first aspect, the outer wall of the second grinding ring further has four horizontally arranged grooves.

In a fifth possible implementation manner of the first aspect, the second grinding ring includes a second upper grinding ring and a second lower grinding ring, and the second upper grinding ring and the second lower grinding ring are arranged at the bottom end of the second grinding roller shaft And the diameter of the second upper grinding ring and the second lower grinding ring are the same, and the sum of the heights of the second upper grinding ring and the second lower grinding ring is the same as the height of the first grinding ring.

In combination with the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect, the outer wall of the first grinding ring further has a plurality of horizontally arranged grooves.

In a seventh possible implementation manner of the first aspect, the material of the first grinding ring and the second grinding ring is high manganese steel Mn13.

In an eighth possible implementation manner of the first aspect, it further includes four third grinding rollers, and each third grinding roller is fixedly arranged on the quincunx and located between the adjacent first grinding roller and second grinding roller. And the outer wall of each third grinding roller is tangent to the outer walls of the first grinding ring and the second grinding ring, and the diameter of the third grinding roller is smaller than the diameter of the second grinding roller.

In combination with the eighth possible implementation manner of the first aspect, in the ninth possible implementation manner of the first aspect, the angle between the centers of the two adjacent third grinding rollers with the main shaft as the axis is 90 degrees.

Compared with the prior art, this application has the following advantages:

The eight-roller Raymond mill of the present application adds four second grinding rollers to the existing Raymond mill, increasing the number of grinding rollers to eight, increasing the grinding contact area, reducing the grinding cycle, improving work efficiency, and reducing cost. In addition, this application reduces the four added second grinding rollers as small diameter grinding rollers compared to the first grinding roller, which is not only convenient for maintenance, but also can greatly improve the fineness of the product, and grind the material to 800 mesh, or even some The material can reach 1200 mesh, the hardness of the material is also increased to Mohs 9.3, the output and the screening rate are much higher than the existing Raymond mill.

At the same time, the distance from the connection position of the first mounting part and the first grinding roller to the axis of the main shaft is less than the distance between the connection position of the second mounting part and the second grinding roller and the axis of the main shaft. The second grinding roller assembly is staggered, so that the outer walls of the grinding ring of the first grinding roller assembly and the second grinding roller assembly are arranged on the same plane, and this arrangement can also maintain the overall stability of the device.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Figure 1 is a schematic diagram of an eight-roller Raymond mill according to an embodiment of the present application;

Fig. 2 and Fig. 3 are schematic diagrams of part A in Fig. 1.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In an embodiment of the present application, please refer to FIG. 1, which is a schematic diagram of an eight-roller Raymond mill according to an embodiment of the present application. As shown in the figure, the eight-roll Raymond mill 1 includes a plum blossom stand 2, a main shaft 3, four first grinding roller assemblies 4 and four second grinding roll assemblies 5, the plum blossom stand 2 is fixedly arranged on the main shaft 3, and four The first grinding roller assembly 4 and the four second grinding roller assemblies 5 are arranged in the plum blossom stand 2. The eight-roller Raymond mill 1 of this embodiment increases the number of grinding roll assemblies on the plum blossom stand 2. Increase to eight, increase the contact area when grinding materials, thereby improving grinding efficiency, shortening the grinding cycle, and reducing production costs.

The quincunx 2 has a main body 21, four first mounting parts 22 and four second mounting parts 23. The main body 21 is fixedly arranged on the main shaft 3, and the four first mounting parts 22 and the four second mounting parts 23 are along the The main shaft 3 is arranged on the main body 21 alternately in the circumferential direction. In this embodiment, each first mounting portion 22 includes a large-diameter connecting lug 221, each second mounting portion 23 includes a small-diameter connecting lug 231, the large-diameter connecting lug 221, the small-diameter connecting lug 231, and the main body 21 are One-piece structure, but not limited to this.

In an embodiment, each small-diameter connecting ear 231 and its adjacent large-diameter connecting ear 221 are connected by an arc line 24. This arc-line connection method makes the large-diameter connecting ear 221 and the small-diameter connecting ear 231 one The included angle is an obtuse angle and the transition is natural. When the device is running, it can reduce the resistance during the operation of the device and reduce the noise.

Each first grinding roller assembly 4 has a first grinding roller shaft (which is concentric with the first grinding ring 42, which is not shown in the figure), a first grinding roller 41 and a first grinding ring 42. One end is corresponding to the first mounting portion 22, and the other end is connected to the first grinding roller 41 to set the first grinding roller 41 on the plum blossom frame 2. The first grinding ring 42 and the first grinding roller 41 are correspondingly arranged on the first grinding roller 41. The bottom end of the roller shaft cooperates with the first grinding roller 41 to grind materials. In this embodiment, when the first grinding roller assembly 4 is grinding materials, the first grinding roller 41 is fixed, and the first grinding ring 42 rotates to cooperate with the first grinding roller 41 to grind the materials.

Each second grinding roller assembly 5 has a second grinding roller shaft (which is concentric with the second grinding ring 52, not shown in the figure), a second grinding roller 51 and a second grinding ring 52. One end is corresponding to the second mounting portion 23, and the other end is connected to the second grinding roller 51 to set the second grinding roller 51 on the plum blossom frame 2. The second grinding ring 52 and the second grinding roller 51 are correspondingly arranged on the second grinding roller. The bottom end of the roller shaft cooperates with the second grinding roller 51 to grind materials. In this embodiment, when the second grinding roller assembly 5 is grinding materials, the second grinding roller 51 is fixed, and the second grinding ring 52 rotates to cooperate with the second grinding roller 51 to realize grinding of the materials.

The diameter of the second grinding roller 51 is smaller than the diameter of the first grinding roller 41, that is, the second grinding roller 51 is a small-diameter grinding roller, and the first grinding roller 41 is a large-diameter grinding roller. The roller Raymond mill is grinding rollers, so this embodiment essentially adds four second grinding rollers 51 on the basis of the existing Raymond mill, increasing the number of grinding rollers to eight, and increasing the contact area when grinding materials. Thereby improving the grinding efficiency, shortening the grinding cycle, and reducing the production cost. In addition, the four second grinding rollers 51 added in this embodiment are small-diameter grinding rollers, which are not only convenient for maintenance, but also can greatly improve the product fineness, and grind materials to 800 mesh, and even some materials can reach 1200 mesh. , The hardness of the material has also been increased to Mohs 9.3, and the output and the screening rate are much higher than the existing Raymond mill.

The angle α between the first grinding roller shaft and the adjacent second grinding roller shaft with the main shaft 3 as the axis is 45 degrees, so that the four first grinding rollers 41 and the four second grinding rollers 51 are evenly spaced. Around the plum blossom stand 2, the stability of the operation of the device is ensured. The distance from the connection position of the first mounting portion 22 and the first grinding roller 41 to the axis of the main shaft 3 is smaller than the distance from the connection position of the second mounting portion 23 and the second grinding roller 51 to the axis of the main shaft 3. In this embodiment, the distance a from the ear hole of the small-diameter connecting lug 231 to the axis of the spindle 3 is greater than the distance b from the ear hole of the large-diameter connecting lug 221 to the axis of the spindle 3. The two grinding roller assemblies 5 are arranged staggered, so that the outer side walls of the grinding rings of the first grinding roller assembly 4 and the second grinding roller assembly 5 are arranged on the same annular surface, and this arrangement can also maintain the device Overall stability. Preferably, the distance a is 3-5 mm larger than the distance b, for example, 3 mm, 4 mm, or 5 mm, but it is not limited to this, and the specific size can be selected according to actual needs.

Please refer to FIG. 2 and FIG. 3 together, which are schematic diagrams of part A in FIG. 1. As shown in the figure, the height of the second grinding ring 52 and the first grinding ring 42 are the same. In this embodiment, please refer to FIG. 2 again. The first grinding ring 42 includes a first upper grinding ring 421 and a first lower grinding ring 422. The first upper grinding ring 421 and the first lower grinding ring 422 are disposed in the first grinding ring. The bottom end of the roller shaft, and the diameters of the first upper grinding ring 421 and the first lower grinding ring 422 are the same, and the sum of the heights of the first upper grinding ring 421 and the first lower grinding ring 422 is the same as the height of the second grinding ring 52, The outer wall of the second grinding ring 52 also has a plurality of horizontally arranged grooves S, and the cut surface of the groove S is preferably arc-shaped to ensure that it will not be blocked by materials.

In another embodiment, please refer to FIG. 3 again, the second grinding ring 52 includes a second upper grinding ring 521 and a second lower grinding ring 522, and the second upper grinding ring 521 and the second lower grinding ring 522 are disposed on the second The bottom end of the grinding roller shaft, and the diameter of the second upper grinding ring 521 and the second lower grinding ring 522 are the same, and the sum of the heights of the second upper grinding ring 521 and the second lower grinding ring 522 is the same as the height of the first grinding ring 42 The outer wall of the first grinding ring 42 also has a plurality of horizontally arranged grooves S, and the cut surface of the groove S is preferably arc-shaped to ensure that it will not be blocked by materials.

In one embodiment, the material of the first grinding ring 42 and the second grinding ring 52 is high manganese steel Mn13. Under a strong impact and high pressure environment, the wear resistance of the grinding ring made of high manganese steel Mn13 is very good. , The high manganese steel Mn13 product after pre-processing treatment in the environment of no impact or low pressure, the wear resistance is also much higher than the imported low-alloy wear-resistant steel, this material can ensure the first grinding ring 42 and the second The service life of the grinding ring 52.

In an embodiment, the eight-roller Raymond mill 1 further includes four third grinding rollers 6, and each third grinding roller 6 is fixedly arranged on the quincunx frame 2 and is located on the adjacent first grinding roller 41 and the second grinding roller 41. Between the rollers 51, and the outer wall of each third grinding roller 6 is tangent to the outer walls of the first grinding ring 42 and the second grinding ring 52. The diameter of the third grinding roller 6 is smaller than the diameter of the second grinding roller 51. 6 is finely ground three roll mill roll, by providing the fine grinding polishing rolls to further increase the contact area and improve the grinding efficiency.

In an embodiment, the angle between the centers of the two adjacent third grinding rollers 6 with the main shaft 3 as the axis is 90 degrees to ensure the stability of the device during operation. Specifically, the upper surface of the plum blossom frame 1 is also regularly provided with connecting holes 7 corresponding to the third grinding roller 6, and the angle β between the two adjacent connecting holes 7 is 90 with the axis of the main shaft 4 as the center. The roller 6 penetrates the connecting hole 7 and is screwed into the connecting hole 7 to facilitate its disassembly. The outer wall of the third grinding roller 6 is tangent to the outer walls of the first grinding ring 42 and the second grinding ring 52. When grinding materials, The third grinding roller 6 is fixed, and rotates through the first grinding ring 42 and the second grinding ring 52, and cooperates with the third grinding roller 6 to grind materials.

In summary, the present application provides an eight-roller Raymond mill, which is based on the existing Raymond mill by adding four second grinding rollers to increase the number of grinding rollers to eight, increasing the grinding contact area and reducing the grinding Cycle, improve work efficiency and reduce costs. In addition, this application reduces the four added second grinding rollers as small diameter grinding rollers compared to the first grinding roller, which is not only convenient for maintenance, but also can greatly improve the fineness of the product, and grind the material to 800 mesh, or even some The material can reach 1200 mesh, the hardness of the material is also increased to Mohs 9.3, the output and the screening rate are much higher than the existing Raymond mill.

At the same time, the distance from the connection position of the first mounting part and the first grinding roller to the axis of the main shaft is less than the distance between the connection position of the second mounting part and the second grinding roller and the axis of the main shaft. The second grinding roller assembly is staggered, so that the outer wall of the grinding ring of the first grinding roller assembly and the second grinding roller assembly are arranged on the same plane, and this arrangement can also maintain the overall stability of the device

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements that are not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

The embodiments of the application are described above with reference to the accompanying drawings, but the application is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of this application, many forms can be made without departing from the purpose of this application and the scope of protection of the claims, all of which fall within the protection of this application.

Claims

An eight-roller Raymond mill, which is characterized in that it comprises:

Plum blossom stand, main shaft, four first grinding roller assemblies and four second grinding roller assemblies;

The quincunx has a main body part, four first installation parts and four second installation parts, the main body part is fixedly arranged on the main shaft, the four first installation parts and the four second installation parts Are alternately arranged on the main body part in a circumferential direction along the main shaft;

Each of the first grinding roller assemblies has a first grinding roller shaft, a first grinding roller, and a first grinding ring. One end of the first grinding roller shaft is corresponding to the first mounting part, and the other end is connected to The first grinding roller is configured to arrange the first grinding roller on the plum blossom frame, and the first grinding ring and the first grinding roller are correspondingly arranged at the bottom end of the first grinding roller shaft so as to be in contact with the The first grinding roller cooperates with grinding materials;

Each of the second grinding roller assemblies has a second grinding roller shaft, a second grinding roller, and a second grinding ring. One end of the second grinding roller shaft is corresponding to the second mounting portion, and the other end is connected to The second grinding roller is arranged on the plum blossom stand, and the diameter of the second grinding roller is smaller than the diameter of the first grinding roller, and the second grinding ring and the The second grinding roller is correspondingly arranged at the bottom end of the second grinding roller shaft to cooperate with the second grinding roller to grind materials, and the height of the second grinding ring and the first grinding ring are the same;

Wherein, the distance between the connection position of the first mounting portion and the first grinding roller and the axis of the main shaft is smaller than the distance between the connection position of the second mounting portion and the second grinding roller and the axis of the main shaft, The included angle between the first grinding roller shaft and the adjacent second grinding roller shaft with the main shaft as the axis is 45 degrees.
The eight-roller Raymond mill according to claim 1, wherein each of the first mounting parts includes a large-diameter connecting ear, each of the second mounting parts includes a small-diameter connecting ear, and the small-diameter connecting ear The distance from the ear hole of the ear to the axis of the spindle is greater than the distance from the ear hole of the large-diameter connecting ear to the axis of the spindle.
The eight-roller Raymond mill according to claim 2, wherein each of the small-diameter connecting ears and the adjacent large-diameter connecting ears are connected by an arc.
The eight-roll Raymond mill according to claim 1, wherein the first grinding ring comprises a first upper grinding ring and a first lower grinding ring, and the first upper grinding ring and the first lower grinding ring The ring is arranged at the bottom end of the first grinding roller shaft, and the diameters of the first upper grinding ring and the first lower grinding ring are the same, and the heights of the first upper grinding ring and the first lower grinding ring are The sum is the same as the height of the second grinding ring.
The eight-roll Raymond mill according to claim 4, wherein the outer wall of the second grinding ring further has a plurality of horizontally arranged grooves.
The eight-roll Raymond mill according to claim 1, wherein the second grinding ring comprises a second upper grinding ring and a second lower grinding ring, and the second upper grinding ring and the second lower grinding ring The ring is arranged at the bottom end of the second grinding roller shaft, and the diameters of the second upper grinding ring and the second lower grinding ring are the same, and the heights of the second upper grinding ring and the second lower grinding ring are The sum is the same as the height of the first grinding ring.
The eight-roll Raymond mill according to claim 6, wherein the outer wall of the first grinding ring further has a plurality of horizontally arranged grooves.
The eight-roll Raymond mill according to claim 1, wherein the material of the first grinding ring and the second grinding ring is high manganese steel Mn13.
The eight-roller Raymond mill according to claim 1, further comprising four third grinding rollers, and each of the third grinding rollers is fixedly arranged on the plum blossom stand and is located in the adjacent first grinding roller. Between a grinding roller and the second grinding roller, and the outer wall of each third grinding roller is tangent to the outer walls of the first grinding ring and the second grinding ring. The diameter is smaller than the diameter of the second grinding roller.
The eight-roll Raymond mill according to claim 9, wherein the angle between the centers of the two adjacent third grinding rollers with the main shaft as the axis is 90 degrees.