A main flow guiding type distribution device for a vertical mill

Abstract

The utility model belongs to vertical grinding cloth material technical field especially relates to a kind of active flow guide type grinding disc cloth distribution device for vertical grinding.A kind of active flow guide type grinding disc cloth distribution device for vertical grinding, including shunt component and cloth component;The shunt component includes lower connecting plate, the taper shunt cone fixedly connected on the lower connecting plate, the connecting cylinder fixedly connected in the upper portion of the shunt cone, the upper connecting plate fixedly connected on the connecting cylinder, and a plurality of shunt grooves are set in the outer side end surface of the upper connecting plate;The cloth component includes the cloth bottom plate fixedly connected on the upper connecting plate, the outer baffle ring fixedly connected on the cloth bottom plate outer side end, and the cloth groove is set in the outer side end surface of the cloth bottom plate;Multiple streamline guide plates are fixedly connected with the axis of shunt cone as shaft on the conical surface of the shunt cone.The utility model can be actively guided into grinding material and better cloth distribution under the action of centrifugal force.

Description

Technical Field

[0001] This utility model belongs to the field of vertical mill material feeding technology, and in particular relates to an active flow guiding mill disc material feeding device for vertical mills. Background Technology

[0002] The structure and working principle of a vertical roller mill can be found in Chinese Utility Model Patent No. CN204448162U, entitled "A Vertical Roller Mill". In existing technology, only a planar pressure plate is typically installed at the center of the rotating grinding disc assembly. As the working principle of a vertical mill shows, if the material entering the mill falls at the center of the grinding disc, it will gradually roll outwards under the centrifugal force generated by the rotation of the grinding disc, achieving more uniform material distribution and thus higher grinding efficiency. However, due to various factors (such as limitations imposed by the density, particle size, viscosity, moisture content, and feeding method of the material entering the mill), the material cannot ideally fall at the geometric center of the grinding disc, forming a conical pile. This results in excessive local deviations in the material layer thickness, which can easily lead to irregular vibration of the grinding rollers, and in severe cases, even cause the mill to stop and cease production. Utility Model Content

[0003] To address the technical problems existing in the prior art, this application provides an active flow guiding mill disc feeding device for vertical mills that can actively guide the material entering the mill to better distribute it under the action of centrifugal force.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An active flow-guiding grinding disc feeding device for a vertical mill includes a flow-dividing assembly and a feeding assembly. The flow-dividing assembly includes a lower connecting plate fixedly connected to the grinding disc assembly, a conical flow-dividing cone fixedly connected to the lower connecting plate, a connecting cylinder fixedly connected to the upper part of the flow-dividing cone, and an upper connecting plate fixedly connected to the connecting cylinder. A plurality of flow-dividing grooves are formed on the outer end face of the upper connecting plate. The feeding assembly includes a feeding base plate fixedly connected to the upper connecting plate and an outer retaining ring fixedly connected to the outer side of the upper end of the feeding base plate. A feeding groove communicating with the flow-dividing grooves is formed on the outer end face of the feeding base plate. A plurality of streamlined flow-guiding plates are fixedly connected to the conical surface of the flow-dividing cone with the axis of the flow-dividing cone as the axis. The streamlined flow-guiding direction of the flow-guiding plates is opposite to the rotation direction of the grinding disc assembly.

[0005] Preferably, an inner retaining ring is fixedly connected to the upper surface of the fabric base plate inside the fabric groove, and the height of the inner retaining ring is lower than the height of the outer retaining ring.

[0006] Preferably, a lifting lug is fixedly connected to the upper surface of the fabric base plate inside the inner retaining ring.

[0007] Preferably, the lower end face of the guide plate is fixedly connected to the upper end face of the mounting plate, and the mounting plate is detachably fixedly connected to the outer cone surface of the diverter cone.

[0008] Preferably, a slide is detachably and fixedly connected to the outer cone surface of the diversion cone between every two mounting plates.

[0009] Preferably, there is a height difference between the guide plate, the mounting plate and the slide plate and the upper connecting plate.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This application replaces the existing grinding disc assembly pressure cap with this active flow-guiding grinding disc feeding device to actively guide the material entering the mill to be better distributed under centrifugal force. As the vertical mill disc rotates, this active flow-guiding grinding disc feeding device actively breaks up the conical material pile formed off-center from the grinding disc, allowing it to quickly flatten and achieve more uniform material distribution, thereby achieving higher grinding efficiency. Simultaneously, the impact of the material entering the mill on the feeding base plate and guide plate becomes periodic, which significantly extends the service life of related components.

[0011] 2. This utility model, by setting up a material distribution assembly, can effectively receive the grinding material and evenly distribute it into the guide chambers at various points of the flow divider cone, ensuring uniform and efficient material distribution under the guidance of the guide plate. By setting the guide plate on the mounting plate, and by detachably fixing the mounting plate and the slide plate on the flow divider cone, it is convenient to replace the guide plate, mounting plate, and slide plate when they wear out.

[0012] 3. By setting up a material distribution component and a flow distribution component, this utility model can meet the requirements of different feeding methods, such as chute feeding or central cylinder feeding. The material thrown out from the material distribution groove and the flow distribution groove, the material overflowing from the outer baffle ring, and the material falling directly into the flow guide cavity can all be evenly distributed under the rotation of this utility model. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the installation position of this utility model on an existing grinding disc assembly.

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure of the current splitter component of this utility model.

[0016] Figure 4 This is a half-sectional structural diagram of the current splitter component of this utility model.

[0017] Figure 5 This is a schematic diagram of the fabric assembly of this utility model.

[0018] Figure 6 This is a half-sectional structural diagram of the fabric component of this utility model.

[0019] Figure 7 This is a schematic diagram of the connection structure between the guide plate and the mounting plate of this utility model.

[0020] Figure 8 This is a schematic diagram of the slide of this utility model.

[0021] In the diagram: 1. Flow divider assembly; 11. Lower connecting plate; 111. Lower connecting plate countersunk hole; 12. Flow divider cone; 13. Connecting cylinder; 14. Upper connecting plate; 141. Flow divider groove; 15. Guide plate; 16. Slide plate; 17. Mounting plate; 18. Flow guide cavity. 2. Fabric assembly; 21. Fabric base plate; 211. Fabric groove; 22. Outer retaining ring; 23. Inner retaining ring; 24. Lifting lug. 3. Grinding disc assembly; 4. Fastening bolts. Detailed Implementation

[0022] 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, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0024] See appendix Figure 2 As shown, an active flow guiding type grinding disc feeding device for vertical mill includes a flow distribution component 1 fixedly installed on an existing rotatable grinding disc assembly 3 and a feeding component 2 detachably and fixedly installed on the flow distribution component 2.

[0025] The flow divider assembly 1 includes a lower connecting plate 11, a flow divider cone 12, a connecting cylinder 13, an upper connecting plate 14, a guide plate 15, a slide plate 16, and a mounting plate 17.

[0026] See Figure 3 , 4As shown, the lower connecting plate 11 can be a horizontally arranged annular structure, and the flow divider cone 12 can be a hollow conical structure. The lower part of the flow divider cone 12 is welded to the inner side of the upper end face of the lower connecting plate 11. Multiple lower connecting plate countersunk holes 111 are evenly distributed on the lower connecting plate 11 outside the flow divider cone 12. Fastening bolts can be inserted through the lower connecting plate countersunk holes 111 and threaded into the grinding disc assembly 3, thereby fixing the lower connecting plate 11 onto the grinding disc assembly 3.

[0027] The flow divider cone 12 requires its horizontal included angle α (e.g., ... Figure 4 (As shown) should be appropriately larger than the natural angle of repose of general feed materials in order to achieve better material distribution effect, and be able to adapt to both chute feeding and central cylinder feeding conditions, and also meet the requirements of different powder selection methods.

[0028] In this embodiment, the upper end of the diversion cone 12 is provided with a circular opening, and the connecting cylinder 13 is a hollow cylindrical structure that is inserted into the circular opening at the upper end of the diversion cone 12 and is fixed to the diversion cone 12 by welding.

[0029] The upper connecting plate 14 is an overall ring structure. The upper connecting plate 14 is sleeved on the upper end of the connecting cylinder 13 and fixed to the connecting cylinder 13 by welding. A plurality of diversion grooves 141 are formed on the outer circumference of the upper connecting plate 14. For example, in this embodiment, a total of 12 diversion grooves 141 are evenly distributed on the outer circumference of the upper connecting plate 14. The diversion grooves 141 are formed by extending from the outer circumference of the upper connecting plate 14 inward.

[0030] Multiple streamlined guide plates 15 are fixedly connected to the conical surface of the flow divider cone 12 with the vertical axis of the flow divider cone 12 as the axis. The multiple streamlined guide plates 15 are evenly distributed. The guide plate 15 is an arc-shaped plate structure perpendicular to the conical surface of the flow divider cone 12. The streamlined flow direction of the guide plate 15 is opposite to the rotation direction of the grinding disk assembly 3. That is, if the grinding disk assembly 3 rotates clockwise when viewed from above, then the flow direction of the guide plate 15 is counterclockwise (all illustrations in this patent are drawn in this direction, such as...). Figure 2 As shown, the deflector 15 is tilted counterclockwise (i.e., the deflector 15 bends to the lower right corner), and vice versa.

[0031] See Figure 2 , 7As shown, the guide vane 15 can be directly welded to the flow divider cone 12. In this embodiment, to facilitate the replacement of the guide vane 15 and to avoid excessive wear on the flow divider cone 12, the lower end face of each guide vane 15 can be welded to the upper end face of the mounting plate 17. One side end face of the mounting plate 17 is consistent with the curved shape of the guide vane 15, that is, the outer curved surface of the mounting plate 17 is flush with one side curved surface of the mounting plate 17. The other side end face of the mounting plate 17 is a planar structure, which is set on the outer side of the inner curved surface of the guide vane 15. The mounting plate 15 is detachably and fixedly connected to the outer cone surface of the flow divider cone 12 by bolts.

[0032] See Figure 2 , 8 As shown, to further protect the flow divider cone 12 from material abrasion, a slide 16 is detachably and fixedly connected to the outer conical surface of the flow divider cone 12 between every two mounting plates 17 by bolts. One end face of the slide 16 is a planar structure and is spliced ​​with one planar end face of the mounting plate 17. The other end face of the slide 16 matches and splices with the outer curved surface of the mounting plate 17. Each set of guide plates 15, mounting plates 17, and slides 16 forms a flow guiding cavity 18. With the above structure, the outer conical surface of the flow divider cone 12 can be protected, and the guide plates 15, mounting plates 17, and slides 16 can be easily replaced when worn.

[0033] See Figure 5 , 6 As shown, the fabric assembly 2 includes a fabric base plate 21, an outer retaining ring 22, an inner retaining ring 23, and a lifting lug 24.

[0034] The fabric base plate 21 has a disc-shaped structure, and a fabric groove 211 communicating with the diversion groove 141 is formed on the outer circumference of the fabric base plate 21. Similarly to the diversion groove 141, the fabric groove 211 is formed by extending from the outer circumference of the fabric base plate 21 inward. In order to enable the material to enter the guide cavity 18 through the fabric groove 211 and the diversion groove 141, in this embodiment, the fabric groove 211 and the diversion groove 141 correspond one-to-one and have the same size, that is, the groove wall of each fabric groove 211 is flush with the groove wall of the diversion groove 141.

[0035] The fabric base plate 21 is fixedly connected to the upper end face of the upper connecting plate 14 by bolts, and the lower end face of the outer retaining ring 22 is welded to the outer side of the upper end of the fabric base plate 21. An inner retaining ring 23 is welded to the upper end face of the fabric base plate 21 inside the fabric groove 211. The height of the inner retaining ring 23 is lower than the height of the outer retaining ring 22, that is, the upper end face of the inner retaining ring 23 is lower than the upper end face of the outer retaining ring 22. In order to facilitate the lifting of the diversion assembly 1 and the fabric assembly 2, a lifting lug 24 is welded to the upper end face of the fabric base plate 21 inside the inner retaining ring 23.

[0036] See Figure 1 , 2As shown, furthermore, when the guide plate 15, mounting plate 17, and slide plate 16 are installed, there is a certain height difference between the upper part of each of them and the upper connecting plate 14, such as... Figure 1 As shown, the upper parts of the guide plate 15, mounting plate 17, and slide 16 are positioned directly below the diversion groove 141. Since the material is thrown out of the diversion groove 141 or overflows from the outer baffle ring 22 and falls into the guide cavity 18, there is little material collision on the outer conical surface of the diversion cone 12 directly below the diversion groove 141. Therefore, the guide plate 15, mounting plate 17, and slide 16 are not installed on the outer conical surface of the diversion cone 12 at this location. See also... Figure 2 As shown, the guide plate 15, mounting plate 17, and slide 16 are located in the lower middle part of the outer cone of the flow divider cone 12, and there is a certain distance between the upper part of the guide plate 15, mounting plate 17, and slide 16 and the outer circumference of the connecting cylinder 13. By setting the above-mentioned height difference, the material impacts the flow guide cavity 18 under the action of gravity, thereby achieving better and more uniform material distribution and enhancing the flow guide and material distribution effect.

[0037] The installation and operation process of this utility model embodiment is as follows: Connect the diversion component 1 and the fabric component 2 as described above, such as... Figure 2 As shown; Using existing lifting equipment, the lifting lug 24 is used to lift the fabric device to the center of the upper end face of the grinding disc assembly 3. The upper end face of the grinding disc assembly 3 is pre-drilled with threaded holes corresponding to the countersunk holes 111 of the lower connecting plate. The fastening bolts 4 are inserted into each countersunk hole 111 of the lower connecting plate and threaded into the corresponding threaded holes of the grinding disc assembly, thereby fixing the fabric device on the grinding disc assembly 3 and rotating together with the grinding disc assembly 3.

[0038] This feeding device is suitable for different feeding methods, such as chute feeding and center cylinder feeding. The material fills the inner retaining ring 23 to form a lining, avoiding wear on the inner retaining ring 23 and the lifting lug 24. The material falling into the outer retaining ring 22 outside the inner retaining ring 23 can be effectively distributed through the feeding groove 211 and the diversion groove 141 to the guide chambers 18 at various points of the diversion cone 12 under the rotation of the feeding assembly 2. Under the guidance of the rotating guide plate 15, it is evenly distributed onto the grinding disc at the grinding roller. The material overflowing from the outer retaining ring 22 and the material falling directly into the guide chamber 18 through different feeding methods can be evenly guided by the rotating guide plate 15 to the grinding disc at the grinding roller for grinding.

[0039] Under the rotation of this feeding device, it can actively break up the conical material pile formed off the center of the grinding disc, and at the same time make the impact of the material entering the mill on the lower connecting plate 11 and the guide plate 15 periodic, which can extend the service life of related components to a considerable extent. After the guide plate 15, the mounting plate 17 and the slide 16 are worn, they can be quickly repaired or replaced at the customer's site. At the same time, different curved surfaces of the guide plate 15 and the corresponding slide 16 and mounting plate 17 can be adaptively set according to different working conditions or materials entering the mill.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical mill active flow guiding type grinding disc feeding device, characterized in that: Includes flow distribution components and fabric components; The flow-dividing assembly includes a lower connecting plate fixedly connected to the grinding disc assembly, a tapered flow-dividing cone fixedly connected to the lower connecting plate, a connecting cylinder fixedly connected to the upper part of the flow-dividing cone, and an upper connecting plate fixedly connected to the connecting cylinder. A plurality of flow-dividing grooves are formed on the outer end face of the upper connecting plate. The fabric assembly includes a fabric base plate fixedly connected to the upper connecting plate, an outer retaining ring fixedly connected to the outer side of the upper end of the fabric base plate, and a fabric groove communicating with the diversion groove is provided on the outer end face of the fabric base plate. Multiple streamlined guide plates are fixedly connected to the conical surface of the flow divider cone with the axis of the flow divider cone as the axis. The streamlined flow direction of the guide plates is opposite to the rotation direction of the grinding disc assembly.

2. The active flow guiding type grinding disc feeding device for a vertical mill according to claim 1, characterized in that: An inner retaining ring is fixedly connected to the upper surface of the fabric base plate inside the fabric groove, and the height of the inner retaining ring is lower than the height of the outer retaining ring.

3. The active flow guiding type grinding disc feeding device for a vertical mill according to claim 2, characterized in that: A lifting lug is fixedly connected to the upper end face of the fabric base plate inside the inner retaining ring.

4. The active flow guiding type grinding disc feeding device for a vertical mill according to claim 1, characterized in that: The lower end face of the guide plate is fixedly connected to the upper end face of the mounting plate, and the mounting plate is detachably fixedly connected to the outer cone surface of the diverter cone.

5. The active flow guiding type grinding disc feeding device for a vertical mill according to claim 4, characterized in that: A slide is detachably and fixedly connected to the outer cone surface of the diversion cone between every two mounting plates.

6. The active flow guiding type grinding disc feeding device for a vertical mill according to claim 5, characterized in that: There is a height difference between the guide plate, the mounting plate and the slide plate and the upper connecting plate.

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