A guide plate and a cement vertical grinder rotor sealing guide mechanism

Abstract

The utility model relates to cement grinding equipment technical field, specifically is a guide vane and cement vertical grinder rotor sealing flow guide mechanism. The utility model discloses the guide vane through annular bottom plate, inner and outer ring cover and the stratified setting sedimentation tank structure, has formed the stepped fine powder flow surface. The stepped flow surface passes through multistage flow extension fine powder path, and the coarse powder is fully settled due to gravity, and the fine powder flows along the optimized path, and the sorting granularity is more uniform. The coaxial layout of inner and outer ring cover and partition plate ensures the symmetry of airflow and material distribution, reduces the interference of local turbulence to sorting. The outer sedimentation tank and inner sedimentation tank capture the coarse powder sinking after colliding with inner and outer ring cover respectively, and the phenomenon that the coarse powder mixes into the fine powder flow, that is, the " coarse running " phenomenon is reduced significantly.

Description

Technical Field

[0001] This utility model relates to the technical field of cement grinding equipment, specifically a guide plate and a rotor sealing and guiding mechanism for a vertical cement grinder. Background Technology

[0002] As a commonly used grinding instrument in the field of cement grinding technology, the vertical cement grinder can separate the ground cement through an air classifier, so that the fine powder that meets the particle size requirements is extracted and collected, while the coarse powder that does not meet the particle size requirements is re-entered into the grinding process until it meets the particle size requirements.

[0003] Currently, vertical grinding mills typically employ annular gaps with constant spacing. Fine powder flows through these gaps and is collected from the discharge port. In practice, to prevent coarse powder from getting stuck, the constant-gap annular gaps are usually set slightly larger to maintain sorting efficiency. However, this can lead to some smaller coarse powder being sucked out and flowing away, affecting the sorting effect, thus requiring a solution. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a guide plate and a rotor sealing and guiding mechanism for a vertical cement grinder. This utility model can effectively eliminate the phenomenon of coarse powder running off during the fine powder sorting process and optimize the sorting effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A flow guide plate includes an annular base plate. An inner ring and an outer ring are coaxially fixed to the upper surface of the annular base plate, with the inner ring being higher than the outer ring. Multiple outer partition plates, perpendicular to the annular base plate, are fixedly installed on the outer wall of the outer ring. These outer partition plates are arranged equidistantly around the circumference of the outer ring, forming an outer settling groove between adjacent outer partition plates. The outer settling groove is used to accommodate coarse powder that settles after colliding with the outer wall of the outer ring. Multiple inner partition plates are arranged within the cavity formed by the inner and outer rings, equidistantly distributed around the circumference of the inner ring. Adjacent inner partition plates form an inner settling groove, which is used to accommodate coarse powder that settles after colliding with the outer wall of the inner ring. The surfaces of the annular base plate, outer partition plates, outer ring, inner partition plates, and inner ring fit together to form a stepped flow surface for fine powder flow.

[0006] As a further embodiment of this utility model, each outer partition plate is inclined to the same side of the radial direction of the outer ring to form a spiral distribution.

[0007] As a further improvement of this utility model, each outer partition plate is inclined to the same side of its vertical plane to form a spiral distribution.

[0008] As a further improvement of this utility model, the spiral direction of each outer partition plate is the same as the spiral direction of each inner partition plate.

[0009] As a further improvement of this utility model: the height of the outer partition plate is lower than that of the outer ring sleeve, and the height of the inner partition plate is also lower than that of the outer ring sleeve.

[0010] A guide plate and a rotor sealing guide mechanism for a vertical cement grinder are disclosed. The guide mechanism uses the aforementioned guide plate, which includes an annular auxiliary plate. The lower surface of the auxiliary plate has a flow surface and an auxiliary surface that cooperate with the flow surface. The auxiliary surface and the flow surface cooperate to form a stepped annular gap for fine powder flow, and the spacing of the annular gap gradually decreases along the fine powder flow direction to a size that meets the particle size requirements.

[0011] As a further embodiment of this utility model: the auxiliary plate includes an annular support plate arranged coaxially with the annular base plate. A lower ring sleeve that can be sleeved on the outside of each outer partition plate is coaxially fixed to the lower plate surface of the support plate. An upper ring sleeve that can be sleeved on the outside of the inner ring sleeve is coaxially fixed to the upper plate surface of the support plate. The outer surfaces of the lower ring sleeve, the support plate and the upper ring sleeve cooperate to form an auxiliary surface.

[0012] As a further improvement of this utility model: the inner side of the lower plate of the support plate has a groove coaxially recessed, and the outer ring can be coaxially inserted into the groove.

[0013] As a further embodiment of this utility model: the annular base plate is coaxially fixed on the rotor, and the top plate of the rotor is sealed and covered on the central hole of the annular base plate.

[0014] As a further improvement of this utility model, the annular gap and the discharge port are connected to each other.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The guide plate of this utility model forms a stepped fine powder flow surface through an annular base plate, inner and outer rings, and a layered settling tank structure. This stepped flow surface extends the fine powder path through multi-stage guidance, allowing coarse powder to settle fully due to gravity, while fine powder flows along an optimized path, resulting in more uniform particle size distribution. The inner and outer rings are coaxially arranged with the separator plate, ensuring the symmetry of airflow and material distribution and reducing the interference of local turbulence on the sorting process. The outer and inner settling tanks respectively capture coarse powder that settles after colliding with the inner and outer rings, significantly reducing the phenomenon of coarse powder mixing into the fine powder flow, i.e., the "coarse powder runaway" phenomenon.

[0016] 2. The vortex-shaped distribution guides the airflow to form a spiral motion, prolonging the contact time between coarse powder and the separator plate, increasing the collision probability, and accelerating the settling of coarse powder. The inclined structure prevents material from accumulating on the outside of the outer ring, allowing the coarse powder to flow in the opposite direction under the centrifugal force of the rotating guide plate into two settling tanks, thereby reducing the risk of clogging and maintaining sorting efficiency.

[0017] 3. A uniform tilt direction can form a directional vortex, which enhances the centrifugal force and makes it easier for coarse powder to separate from the airflow and enter the settling tank.

[0018] 4. If the inner and outer vortices are in the same direction, the airflow coordination can be enhanced and the sorting speed can be increased; if the directions are opposite, the turbulence intensity can be increased and the coarse powder separation effect can be strengthened.

[0019] 5. A lower partition height reduces disturbance to settled coarse powder and prevents it from re-entering the fine powder stream.

[0020] 6. The annular gap gradually narrows to form a gradient pressure field, which forces the fine powder to be classified multiple times. Finally, only the fine powder that meets the particle size requirements is discharged through the gap.

[0021] 7. The stepped surfaces of the auxiliary plate and the guide plate work together to form a multi-stage sorting channel, which greatly reduces the probability of coarse particles being separated.

[0022] 8. The lower and upper ring sleeves are respectively fitted onto the outer partition plate and the outer side of the inner ring sleeve to ensure consistent clearance between the auxiliary surface and the flow surface. The multi-layered ring sleeves and the support plate form a stable frame, reducing the impact of vibration on the sorting process.

[0023] 9. The countersunk groove and outer ring interlock, simplifying the assembly process and reducing positioning errors. The depth of the countersunk groove restricts the radial movement of the outer ring, ensuring the dimensional stability of the annular gap.

[0024] 10. The rotor directly drives the guide plate to rotate, using centrifugal force to accelerate the separation of coarse powder. The rotor top plate seals the central hole to prevent coarse powder from leaking from the central area, ensuring a clean sorting environment.

[0025] 11. Qualified fine powder passes through the gap and directly enters the discharge port, reducing path detours and avoiding secondary agglomeration of fine powder. The flow guiding mechanism is seamlessly connected to the discharge port, simplifying the layout of the powder classifier and reducing energy consumption. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the vertical cement grinding machine in this utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the guide plate in this utility model.

[0028] Figure 3 for Figure 1 A magnified structural diagram at point A in the diagram.

[0029] In the diagram: 1. Grinding mechanism; 2. Rotor; 3. Discharge port; 4. Guide plate; 41. Annular bottom plate; 42. Outer partition plate; 43. Outer ring sleeve; 44. Inner partition plate; 45. Inner ring sleeve; 5. Auxiliary plate; 51. Support plate; 52. Lower ring sleeve; 53. Settling trough; 54. Upper ring sleeve; 55. Fixing plate; 6. Annular gap. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-3 The cement vertical grinding mill mainly consists of a vertically arranged grinding mechanism 1, a classifier, and auxiliary structures. Its core includes a horizontally rotating grinding disc and symmetrically distributed hydraulically driven grinding rollers above it, which crush materials through grinding action. The transmission system, consisting of a main motor and a reducer, drives the grinding disc to rotate and controls the grinding pressure. The classifier, located above the grinding zone, includes a dynamic classifier and a flow guiding mechanism such as a guide plate 4 with a settling tank. It uses centrifugal force and a stepped flow surface to separate coarse and fine powders. Coarse powder falls back for regrinding, while fine powder is collected by a cyclone separator. The feed inlet is located at the center of the grinding disc, and material is evenly fed in through a feeding device. The finished fine powder is discharged through a discharge pipe, supplemented by an airflow circulation system to maintain powder transport. The entire machine is supported by a rigid frame and integrates lubrication, cooling, and automated control systems to achieve efficient and energy-saving continuous grinding and sorting.

[0032] The flow guiding mechanism of this utility model includes a flow guiding plate 4 installed in the separator and an auxiliary plate 5 that cooperates with the flow guiding plate 4. The annular bottom plate 41 of the flow guiding plate 4 is coaxially fixed on the rotor 2, and the top plate of the rotor 2 is sealed and covered on the central hole of the annular bottom plate 41. An inner ring 45 and an outer ring 43 are coaxially fixed on the upper plate surface of the annular bottom plate 41, and the height of the inner ring 45 is higher than that of the outer ring 43, so that a height difference is formed between the two, which facilitates the formation of the subsequent stepped flow surface. Multiple outer partition plates 42 with plate surfaces perpendicular to the annular plate are fixedly installed on the outer wall surface of the outer ring 43. Each outer partition plate 42 is arranged equidistantly around the circumference of the outer ring 43, and an outer settling groove is formed between adjacent outer partition plates 42. The outer settling groove is used to accommodate coarse powder that settles after colliding with the outer wall surface of the outer ring 43. Multiple inner partition plates 44 are arranged within the cavity formed by the inner ring 45 and the outer ring 43. These inner partition plates 44 are equidistantly distributed around the circumference of the inner ring 45, and inner settling grooves are formed between adjacent inner partition plates 44. These grooves are used to accommodate coarse powder that settles after colliding with the outer wall of the inner ring 45. Figure 2 and Figure 3 As shown, the surfaces of the annular base plate 41, outer partition plate 42, outer ring sleeve 43, inner partition plate 44, and inner ring sleeve 45 are fitted together to form a stepped flow surface for the flow of fine powder.

[0033] Each outer partition plate 42 is inclined to the same side of its vertical plane to form a vortex-like distribution. Similarly, each outer partition plate 42 is inclined to the same side of its radial direction of the outer ring 43 to form a vortex-like distribution. The vortex direction of each outer partition plate 42 is the same as that of each inner partition plate 44. The vortex-like distribution guides the airflow to form a spiral motion, prolonging the contact time between coarse powder and the partition plates, increasing the collision probability, and accelerating the settling of coarse powder. The inclined structure prevents material from accumulating on the outside of the outer ring 43, allowing the coarse powder to flow in the opposite direction out of the two settling tanks under the centrifugal force of the rotating guide plate 4, thereby reducing the risk of clogging and maintaining sorting efficiency.

[0034] like Figure 3 As shown, the auxiliary plate 5 includes an annular support plate 51 coaxially arranged with the annular base plate 41. A lower ring sleeve 52, which can be fitted onto the outside of each outer partition plate 42, is coaxially fixed to the lower plate surface of the support plate 51. An upper ring sleeve 54, which can be fitted onto the outside of the inner ring sleeve 45, is coaxially fixed to the upper plate surface of the support plate 51. The outer surfaces of the lower ring sleeve 52, the support plate 51, and the upper ring sleeve 54 cooperate to form an auxiliary surface. At the same time, in order to further improve the firmness of the upper ring sleeve 54 on the housing, an annular fixing plate 55 is coaxially fixed to the outside of the upper ring sleeve 54, and the fixing plate 55 is fixedly installed inside the housing.

[0035] like Figure 3 As shown, the auxiliary surface and the flow surface cooperate to form a stepped annular gap 6 for the flow of fine powder, and the spacing of the annular gap 6 gradually decreases along the flow direction of the fine powder to a size that meets the particle size requirements. The annular space formed by the cooperation of the auxiliary surface and the flow surface has a stepped cross-section, meaning that the gap height is not uniform, but varies layer by layer through a multi-level structure. The multi-level steps create a "sieve effect," with each level corresponding to a different gap height. Coarse powder, due to its larger particle size, is intercepted in the wider initial gap section; fine powder flows into a narrower gap section, achieving step-by-step screening. The narrowing gap accelerates the Bernoulli effect of the airflow velocity, enhancing the carrying capacity of fine powder, while increasing the probability of collision between coarse powder and the auxiliary / flow surface, promoting the settling of coarse powder. The stepped annular gap 6 forms multiple "barriers," requiring coarse powder to collide multiple times to pass through, significantly reducing the probability of "coarse powder escaping."

[0036] During use, rotor 2 rotates, and the discharge port 3 uses negative pressure adsorption to force the fine powder along... Figure 3The arrows indicate that the powder flows through the annular gap 6, and the coarse powder collides repeatedly with the auxiliary / flowing surface, causing it to fall into the outer and inner settling tanks. Simultaneously, driven by the rotor 2, the coarse powder moves upwards along the surface of the vortex-shaped inner partition plate 44 under the action of centrifugal force, and then moves into the outer settling tank. Finally, guided by the outer partition plate 42, it falls back into the grinding mechanism 1 for secondary grinding and pulverization, effectively improving the sorting effect.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A deflector plate, characterized in that, The system includes an annular base plate (41), on which an inner ring sleeve (45) and an outer ring sleeve (43) are coaxially fixedly connected, with the inner ring sleeve (45) being higher than the outer ring sleeve (43). Multiple outer partition plates (42) with surfaces perpendicular to the annular base plate are fixedly installed on the outer wall of the outer ring sleeve (43). Each outer partition plate (42) is arranged equidistantly around the outer ring sleeve (43) in a circumferential direction, forming an outer settling groove between adjacent outer partition plates (42). The outer settling groove is used to accommodate sediment that sinks after colliding with the outer wall of the outer ring sleeve (43). Coarse powder; Multiple inner partition plates (44) are arranged in the cavity formed by the inner ring (45) and the outer ring (43). Each inner partition plate (44) is distributed equidistantly around the circumference of the inner ring (45). An inner settling groove is formed between adjacent inner partition plates (44). The inner settling groove is used to accommodate the coarse powder that sinks after colliding with the outer wall of the inner ring (45). The surfaces of the annular bottom plate (41), the outer partition plate (42), the outer ring (43), the inner partition plate (44), and the inner ring (45) cooperate to form a stepped flow surface for the flow of fine powder.

2. A guide vane according to claim 1, characterized in that, Each outer partition plate (42) is inclined to the same radial side of the outer ring (43) where it is located, so as to form a spiral distribution.

3. A guide vane according to claim 2, characterized in that, Each outer partition (42) is inclined to the same side of the vertical plane in which it is located, so as to form a spiral distribution.

4. A guide vane according to claim 3, characterized in that, The vortex direction of each outer partition plate (42) is the same as the vortex direction of each inner partition plate (44).

5. A guide vane according to claim 4, characterized in that, The height of the outer partition plate (42) is lower than that of the outer ring sleeve (43), and the height of the inner partition plate (44) is also lower than that of the outer ring sleeve (43).

6. A rotor sealing and flow guiding mechanism for a vertical cement grinder, wherein the flow guiding mechanism uses a flow guiding plate as described in any one of claims 1-5, characterized in that, The auxiliary plate (5) includes an annular plate. The lower plate surface of the auxiliary plate (5) has a flow surface and an auxiliary surface. The auxiliary surface and the flow surface cooperate to form a stepped annular gap (6) for the flow of fine powder. The spacing of the annular gap (6) gradually decreases along the flow direction of fine powder to meet the particle size requirements.

7. The rotor sealing and guiding mechanism for a vertical cement grinder according to claim 6, characterized in that, The auxiliary plate (5) includes an annular support plate (51) arranged coaxially with the annular base plate (41). A lower ring sleeve (52) that can be sleeved on the outside of each outer partition plate (42) is coaxially fixed on the lower plate surface of the support plate (51). An upper ring sleeve (54) that can be sleeved on the outside of the inner ring sleeve (45) is coaxially fixed on the upper plate surface of the support plate (51). The outer surfaces of the lower ring sleeve (52), the support plate (51) and the upper ring sleeve (54) cooperate to form an auxiliary surface.

8. The rotor sealing and guiding mechanism for a vertical cement grinder according to claim 7, characterized in that, The inner side of the lower plate of the support plate (51) has a groove (53) that is coaxially recessed, and the outer ring can be coaxially inserted into the groove (53).

9. The rotor sealing and guiding mechanism for a vertical cement grinder according to claim 8, characterized in that, The annular base plate (41) is coaxially fixed on the rotor (2), and the top plate of the rotor (2) is sealed and covered on the center hole of the annular base plate (41).

10. The rotor sealing and guiding mechanism for a vertical cement grinder according to claim 9, characterized in that, The annular gap (6) is connected to the discharge port (3).

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