A kind of roller mill layer thickness and air ring air speed independent adjustment adjusting structure

Abstract

The utility model provides a kind of adjusting structure that roll mill material layer thickness and air ring air speed are independently adjusted respectively, including baffle ring, air speed adjusting ring and ring support, the outer diameter of the baffle ring is less than the inner diameter of the air speed adjusting ring, multiple first connecting pieces are equipped on the outer side wall of the baffle ring, multiple second connecting pieces are equipped on the inner side wall of the air speed adjusting ring, the first connecting piece and the second connecting piece are respectively misaligned and set on the ring support, and the ring support is set on roll mill body;Height adjusting piece is respectively arranged between the first connecting piece and the ring support and between the second connecting piece and the ring support.The utility model is independently set by baffle ring and air speed adjusting ring, and baffle ring and air speed adjusting ring are independently and correspondingly set height adjusting piece, so the height of baffle ring and the height of air speed adjusting ring can be independently adjusted respectively, and they do not interfere with each other, with the advantages of simple structure and easy operation.

Description

Technical Field

[0001] This utility model relates to the field of vertical roller mill grinding, and in particular to an adjustment structure that allows for independent adjustment of the material layer thickness and the air ring speed of a roller mill. Background Technology

[0002] A vertical roller mill is a material grinding equipment. It is equipped with a baffle ring, the function of which is to control the thickness of the material layer by adjusting the height of the baffle ring. A side roller mill also has an air ring structure. The air ring is actually a ring-shaped air outlet cavity on the roller mill. The baffle ring is located at the opening of the air outlet cavity, that is, the outer wall of the baffle ring is actually part of the air outlet of the air ring.

[0003] Currently, the height of the baffle ring is adjusted by raising or lowering the shims to control the material layer thickness. However, this method also affects the ventilation area of ​​the air ring outlet, thus impacting the system's air pressure, velocity, and volume. In reality, when grinding specific materials, with fixed output, fineness, and drying moisture content, there is an optimal value for the air volume, velocity, and material layer thickness at the air ring. Therefore, once the air velocity and volume of the air ring are determined, it is undesirable to alter the ventilation area at the air ring while adjusting the baffle ring, thereby affecting the stability of the vertical mill system. Furthermore, since the height of the baffle ring needs to be achieved using shims of different thicknesses, multiple shims of varying thicknesses need to be stored for backup. Since the shims are sized to correspond to the baffle ring and are relatively large, their transport, storage, and disassembly are inconvenient in practice.

[0004] Furthermore, in actual production processes, the required airflow velocity of the air ring may vary due to differences in material composition, product fineness, and moisture content. Currently, the airflow velocity at the air ring outlet cannot be adjusted independently. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, this utility model proposes an adjustment structure that allows for independent adjustment of the material layer thickness and the air ring speed of a roller mill.

[0006] An adjustment structure for independently adjusting the material layer thickness and air ring speed of a roller mill includes a material retaining ring, an air speed adjusting ring, and a ring support. The outer diameter of the material retaining ring is smaller than the inner diameter of the air speed adjusting ring. Multiple first connecting members are provided on the outer side wall of the material retaining ring, and multiple second connecting members are provided on the inner side wall of the air speed adjusting ring. The first and second connecting members are respectively staggered on the ring support, which is mounted on the roller mill body. Height adjusting members are respectively provided between the first connecting members and the ring support, and between the second connecting members and the ring support.

[0007] Based on the above, the height adjustment component is an adjustment washer.

[0008] Based on the above, there are multiple adjusting washers. Multiple adjusting washers are respectively provided between the first connecting member and / or the second connecting member and the ring support. The remaining adjusting washers are provided as spare washers between the first connecting member and the second connecting member and the fixing bolt.

[0009] Based on the above, the first connector and the second connector are connecting pieces, and the connecting pieces are provided with connecting through holes; the ring support is provided with threaded holes corresponding to the connecting through holes, and the connecting pieces are mounted on the ring support by fixing bolts.

[0010] This utility model has substantial features and progress compared with the prior art. Specifically, this utility model independently sets up a baffle ring and a wind speed regulating ring, and each of the baffle ring and the wind speed regulating ring is independently equipped with a height adjusting component. Therefore, the height of the baffle ring and the height of the wind speed regulating ring can be adjusted independently without interfering with each other. It has the advantages of simple structure and convenient operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the material retaining ring of this utility model.

[0012] Figure 2 This is a schematic diagram of the wind speed regulating ring of this utility model.

[0013] Figure 3 This is a schematic diagram of the assembly structure of the material-blocking ring and the wind speed regulating ring of this utility model.

[0014] Figure 4 This is a schematic diagram of the cross-sectional structure of the material retaining ring of this utility model.

[0015] Figure 5 This is a schematic diagram of the cross-sectional structure of the wind speed regulating ring of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Lower air ring 1; 2. Upper air ring 2; 3. Wind speed regulating ring; 4. Fixing bolt; 5. Spare adjusting washer; 6. Adjusting washer; 7. Material retaining ring; 8. Ring support; 9. Grinding roller; 10. Grinding disc; 11. First connecting piece; 12. Connecting through hole; 13. Second connecting piece. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-5 As shown, an adjustment structure for independently adjusting the material layer thickness and air velocity of a roller mill includes a baffle ring 7, an air velocity regulating ring 3, and a ring support 8. The ring support 8 is mounted on the roller mill body. The outer diameter of the baffle ring 7 is smaller than the inner diameter of the air velocity regulating ring 3. Therefore, when the baffle ring 7 and the air velocity regulating ring 3 are mounted on the ring support 8, the baffle ring 7 is fitted inside the air velocity regulating ring 3. Multiple first connecting members 11 are provided on the outer side wall of the baffle ring 7, and multiple second connecting members 13 are provided on the inner side wall of the air velocity regulating ring 3. The baffle ring 7 and the air velocity regulating ring 3 are detachably mounted on the ring support 8 via the first connecting members 11 and the second connecting members 13, respectively. The first connecting members 11 and the second connecting members 13 are staggered to avoid mutual interference. Height adjustment components are respectively provided between the first connecting member 11 and the ring support 8 and between the second connecting member 13 and the ring support 8, so that the height of the baffle ring 7 and the wind speed adjustment ring 3 can be adjusted independently by the height adjustment components.

[0019] In reality, the first connector 11 and the second connector 13 are connecting pieces, and the connecting pieces are provided with connecting through holes 12; the ring support 8 is provided with threaded holes corresponding to the connecting through holes 12, and the connecting pieces are mounted on the ring support 8 by fixing bolts 4.

[0020] In this embodiment, the height adjustment component is an adjusting washer 6. In reality, there are multiple adjusting washers 6, for example, 10. Taking the retaining ring 7 as an example (the wind speed adjustment ring 3 is similar), under normal conditions, multiple adjusting washers 6, for example, 5, are respectively provided between each of the first connecting pieces 11 and the ring support 8. The remaining 5 adjusting washers 6 are set as spare washers between the first connecting piece 11 and the fixing bolt 4. When it is necessary to increase the height of the retaining ring 7, the fixing bolt 4 is removed, and the retaining ring 7 is lifted. Then, the target number of adjusting washers 6, for example, 1, is taken from the spare adjusting washers 6 and placed between the first connecting piece and the ring support 8. The retaining ring 7 is then placed and fixed. At this time, there are 6 adjusting washers 6 between the first connecting piece and the ring support 8, and 4 spare adjusting washers 5 between the first connecting piece and the end of the fixing bolt 4. When it is necessary to decrease the height of the retaining ring 7, the principle is similar and will not be described again. The height adjustment process of the wind speed adjustment ring 3 is the same. Therefore, the heights of the baffle ring 7 and the wind speed regulating ring 3 can be adjusted independently without affecting each other. The spare adjusting washer 6 is also directly fixed at the baffle ring 7 or the wind speed regulating ring 3, requiring no additional storage. It is also small in size and easy to operate.

[0021] The grinding process is an existing technology, specifically as follows: Figure 4As shown, the raw material falls into the center of the grinding disc 10. Driven by a drive device such as a reducer, the grinding disc 10 rotates. Under the action of centrifugal force, the raw material moves in all directions. When the raw material reaches the edge of the grinding disc 10, it is crushed by the grinding roller 9. The crushed material continues to move towards the outer periphery of the grinding disc 10. When the material moves to the baffle ring 7, it is blocked by the baffle ring 7. At this time, the material continuously accumulates in the grinding disc 10 and supports the grinding roller 9 to lift upward, forming a certain material layer. As the material continues to increase, the excess material passes over the baffle ring 7 and continues to move towards the outer periphery. After the material passes over the wind speed regulating ring 3, it enters the wind ring formed by the upper wind ring 2 and the wind speed regulating ring 3. At this time, the upward airflow in the wind ring blows the material up again through a certain wind speed and enters the classifier for sorting. Large pieces of material that cannot be blown up fall into the lower machine body through the lower wind ring 1 and are discharged outside the mill.

[0022] The specific process of adjusting the baffle ring 7 and the wind speed regulating ring 3: Because the material layer has an optimal thickness under different raw materials and working conditions, the material layer thickness needs to be adjusted by the height of the baffle ring 7 during actual production. The adjustment method for the baffle ring 7 is as follows: Figure 4 As shown, firstly, remove the fixing bolt 4 of the retaining ring 7. If the height of the material layer needs to be increased or decreased as required, combine different numbers of adjusting washers into adjusting washer groups of different thicknesses and place them under the first connecting piece. Then, reinstall and fix the fixing bolt 4 of the retaining ring 7. In other embodiments, the adjusting washers 6 can also be of different thicknesses, that is, multiple adjusting washers 6 are of different thicknesses. Select the target thickness or combine them as needed, and place the adjusting washer 6 or adjusting washer group of the target thickness under the connecting piece.

[0023] Because there is an optimal wind speed at the ventilation ring under different conditions such as powder material, output, fineness, and drying moisture, the area of ​​the ventilation opening needs to be adjusted by regulating the height of the wind speed regulating ring 3 during actual production (e.g., Figure 5 The wind speed is controlled by the size of the mark A in the middle. The adjustment method of the wind speed regulating ring 3 is as follows: Figure 5 As shown, first remove the fixing bolt 4 of the wind speed regulating ring 3. If the size value A of the ventilation ring needs to be increased or decreased as needed, assemble the adjusting washers into adjusting washer groups of different thicknesses and place them under the second connecting piece. Then reinstall and fix the adjusting bolt of the wind speed regulating ring 3.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An adjustment structure for independently adjusting the material layer thickness and air ring speed of a roller mill, comprising a baffle ring, characterized in that: It also includes a wind speed regulating ring and a ring support. The outer diameter of the baffle ring is smaller than the inner diameter of the wind speed regulating ring. Multiple first connecting members are provided on the outer side wall of the baffle ring, and multiple second connecting members are provided on the inner side wall of the wind speed regulating ring. The first connecting members and the second connecting members are respectively staggered on the ring support, and the ring support is provided on the roller mill body. Height adjusting members are respectively provided between the first connecting members and the ring support, and between the second connecting members and the ring support.

2. The adjustment structure for independently adjusting the material layer thickness and air ring speed of the roller mill according to claim 1, characterized in that: The height adjustment component is an adjustment washer.

3. The adjustment structure for independently adjusting the material layer thickness and air ring speed of the roller mill according to claim 2, characterized in that: There are multiple adjusting washers. Multiple adjusting washers are respectively provided between the first connector and / or the second connector and the ring support. The remaining adjusting washers are provided as spare washers between the first connector and the second connector and the fixing bolt.

4. The adjustment structure for independently adjusting the material layer thickness and air ring speed of the roller mill according to claim 1, characterized in that: The first connector and the second connector are connecting pieces, and the connecting pieces are provided with connecting through holes; the ring support is provided with threaded holes corresponding to the connecting through holes, and the connecting pieces are mounted on the ring support by fixing bolts.

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