Powder selecting device of efficient cement grinding machine

Abstract

The invention relates to the technical field of cement manufacturing facilities, and particularly discloses a powder selecting device of an efficient cement pulverizer. An outlet is formed in the lower end of the pulverizer, a coarse filter plate is arranged above the outlet, an arc-shaped barrel is arranged at the outlet, a rotating roller is installed in the arc-shaped barrel, a plurality of grooves are formed in the rotating roller, a discharging opening is formed in the lower end of the arc-shaped barrel, the discharging opening is located above a conveying belt, and a dispersing device is arranged between the conveying belt and the discharging opening. The tail end of the conveying belt is located above the lower end of the elevator, the upper end of the elevator is located above the trough, and the trough is connected with the pulverizer; a material distributing hopper and a plurality of linked elliptical rollers are arranged in the annular interior of the conveying belt; a collecting device is arranged below the distributing hopper; and material leaking holes are formed in the conveying belt. The dispersing device has the effects of dispersing cement, avoiding accumulation and facilitating separation. And the cement collecting speed and efficiency can be increased, and the cement collecting success rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of cement production facilities, and particularly relates to a powder selecting device for an efficient cement powder mill. Background Art

[0002] Cement is one of the basic building materials used in modern construction projects. During the production process, cement needs to be ground into a specified particle size before it can be used. However, during the grinding process, if the cement powder that has reached the use standard particle size is not separated in time, it will seriously affect the grinding efficiency. Therefore, a powder selecting device is required to perform real-time powder selection on the cement powder during grinding, so as to ensure that the qualified cement powder is separated and the unqualified cement powder is sent back to the grinding equipment to continue grinding.

[0003] In the feeding process of the existing powder selecting device, it is difficult to effectively disperse the cement powder evenly, and usually, the powder is sorted and filtered by sieving. When sorting and transporting by sieving, there may be a situation where the powder that meets the sorting conditions is transported to the cement powder mill for grinding treatment together with the fragments, resulting in low sorting efficiency. Summary of the Invention

[0004] In order to make up for the defects of the existing technology, the present invention provides a powder selecting device for an efficient cement powder mill that improves the powder selection efficiency.

[0005] The present invention is realized by the following technical solutions: A powder selecting device for an efficient cement powder mill includes a powder mill. The feature is that a lower end of the powder mill is provided with an outlet, a coarse filter plate is arranged above the outlet, an arc-shaped cylinder is horizontally arranged at the outlet, a rotating roller is installed in the arc-shaped cylinder, a plurality of grooves are formed on the rotating roller, a discharge port is formed at a lower end of the arc-shaped cylinder, the discharge port is located above a conveyor belt, a dispersing device is arranged between the conveyor belt and the discharge port, a tail end of the conveyor belt is located above a lower end of a hoist, an upper end of the hoist is located above a material trough, and the material trough is connected with the powder mill; a distributing hopper and a plurality of linked elliptical rollers are arranged inside the annular conveyor belt, and planes where major axes of all the elliptical rollers are located are not parallel to each other; a collecting device is arranged below the distributing hopper; leakage holes are arranged on the conveyor belt.

[0006] A transverse cylinder penetrates through the outlet, a rotating shaft is arranged inside the transverse cylinder, an upper end of the rotating shaft is fixedly connected with the coarse filter plate, and the coarse filter plate is rotatably connected with the powder mill; the rotating shaft is driven to rotate by a motor.

[0007] The dispersing device includes an inverted funnel, and a plurality of spiral plates are arranged on a surface of the funnel.

[0008] There are two such arc-shaped cylinders, and each arc-shaped cylinder is provided with a rotating roller. The two rotating rollers are linked through gear meshing.

[0009] The lower end of the rotating shaft is fixedly connected to the funnel.

[0010] The dispersing device is composed of two inclined plates forming an inverted V shape.

[0011] A comb-tooth plate is hinged at the outlet. One side of the groove is arc-shaped. During the rotation of the rotating roller, the arc-shaped side passes through the comb-tooth plate later. The downward rotation angle of the comb-tooth plate is not greater than 1°.

[0012] The tail end of the comb-tooth plate is upturned.

[0013] The cross-section of the groove is an inverted trapezoid.

[0014] The beneficial effects of the present invention are as follows: The present invention is provided with rotating rollers, and a number of grooves are arranged on the rotating rollers. The ground cement passes through the coarse filter plate and then enters the grooves through the outlet, and enters part by part. After rotation, it falls from the discharge port of the arc-shaped cylinder onto the dispersing device. Under the dispersing action of the dispersing device, it is scattered onto the conveyor belt in a dispersed manner. The qualified ground cement falls from the leakage holes on the conveyor belt and finally falls into the collecting device, thereby achieving the purpose of sorting out the ground cement. The dispersing device plays a role in dispersing the cement, avoiding accumulation and facilitating separation.

[0015] The present invention also arranges a number of elliptical rollers inside the conveyor belt, and their major axes are not in the same plane. Due to the special shape of the elliptical rollers, during the rotation process, a state of rising and falling will be formed, causing the conveyor belt to vibrate, accelerating the collection speed and efficiency of the cement, and also improving the success rate of cement collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present invention in conjunction with the drawings: Figure 1 is the schematic plan layout structure diagram of the present invention; Figure 2 is the schematic sectional structure diagram of the present invention; Figure 3 is Figure 2 the enlarged structure diagram at A in Figure 4 is Figure 3 the enlarged structure diagram at C in Figure 5 is the structure diagram of the comb-tooth plate; Figure 6 is the schematic top view structure diagram of the funnel; Figure 7A schematic cross-sectional view of another embodiment of a dispersing device; Figure 8 for Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction (one implementation method of the distribution hopper); Figure 9 for Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction (another implementation of the material distribution hopper); Figure 10 It is a side view structural diagram of the elevator.

[0017] In the figure, 1 is a grinding mill, 2 is an outlet, 3 is a coarse filter plate, 4 is an arc cylinder, 5 is a discharge port, 6 is a rotating roller, 7 is a groove, 8 is a rotating shaft, 9 is a motor, 10 is an inclined plate, 11 is a funnel, 12 is a spiral plate, 13 is a conveyor belt, 14 is a leakage hole, 15 is an elliptical roller, 16 is a dividing hopper, 17 is a collecting device, 18 is an elevator, 19 is a baffle, 20 is a trough, 21 is a comb plate, and 22 is a transverse cylinder. DETAILED DESCRIPTION

[0018] The accompanying drawings are specific embodiments of the present invention.

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0021] like Figures 1 to 10 As shown, the powder selection device of the high-efficiency cement grinder 1 includes a grinder 1, an outlet 2 is provided at the lower end of the grinder 1, a coarse filter plate 3 is installed above the outlet 2, the filter holes of the coarse filter plate 3 are larger than the required cement particle size, and the coarse filter plate 3 can be fixedly installed on the inner wall of the grinder 1, and can also be rotatably installed on the inner wall of the grinder 1.

[0022] An arc cylinder 4 is installed at the outlet 2 of the grinding mill 1. The central axis of the arc cylinder 4 is horizontal. The arc cylinder 4 is connected to the outlet 2. A discharge port 5 is opened at the lower end of the arc cylinder 4. A rotating roller 6 is installed in the arc cylinder 4. The rotating roller 6 is provided with a plurality of grooves 7. The grooves 7 are arranged along the length direction of the rotating roller 6. The cross section of the grooves 7 is preferably an inverted trapezoid.

[0023] There can be two arc-shaped cylinders 4 arranged side by side, each arc-shaped cylinder 4 has a rotating roller 6, and the two rotating rollers 6 are connected by gear meshing to achieve linkage.

[0024] If the coarse filter screen is rotatably installed on the inner wall of the pulverizer 1, then a transverse cylinder 22 that traverses the outlet 2 can be installed at the outlet 2 of the pulverizer 1 at this time. The transverse cylinder 22 can penetrate the entire outlet 2, or can only penetrate to a position beyond the center line of the outlet 2. A rotating shaft 8 is installed in the transverse cylinder 22. The rotating shaft 8 passes upward through the outlet 2 and is fixed at the center position of the coarse filter plate 3. The coarse filter plate 3 is driven to rotate by the rotating shaft 8, and the rotating shaft 8 can be driven to rotate by a motor 9. The driving method can be chain drive connection, or two vertical bevel gears can be used for driving connection. The above driving methods are all prior arts and will not be elaborated.

[0025] A dispersing device is installed below the arc-shaped cylinder 4. The dispersing device can be two inclined plates 10 forming an inverted V shape. The cement coming out of the discharge port 5 of the arc-shaped cylinder 4 slopes down along the two inclined plates 10.

[0026] The dispersing device can also be an inverted funnel 11. A number of spiral plates 12 as shown in Figure 6 are provided on the outer surface of the funnel 11. These spiral plates 12 form a number of spiral grooves. At the same time, the rotating shaft 8 extends downward through the gap between the two arc-shaped cylinders 4 (at this time, the diameter of the gear is larger than the diameter of the rotating roller 6) and is fixed at the top of the funnel 11. The funnel 11 is driven to rotate together by the rotating shaft 8.

[0027] Below the dispersing device is a conveyor belt 13. There are a number of leakage holes 14 on the conveyor belt 13. The particle size of the cement leaking through the leakage holes 14 meets the particle size standard of the finally required cement.

[0028] The conveyor belt 13 is wound around two rollers to form a loop. A number of elliptical rollers 15 as shown in Figure 2 are installed side by side inside the loop. The elliptical rollers 15 are in linkage. The linkage method (not shown in the figure) is a prior art, such as chain linkage, gear linkage, etc., and will not be elaborated. The major axes of the ellipses of the cross-sections of all the elliptical rollers 15 are not parallel. That is to say, at the same time, the directions of their major axes are different. If one major axis is in the up-down direction, then the other major axes are all inclined, and the inclined angles are different. During the rotation of the elliptical rollers 15, a fluctuating state is formed for the conveyor belt 13, and vibration is formed for the cement on the conveyor belt 13, which is convenient for filtering.

[0029] A distributing hopper 16 is installed inside the loop below the elliptical rollers 15. The distributing hopper 16 can be in a slope shape in one direction or in a figure-eight shape in two directions.

[0030] Below the distributing hopper 16 is a collecting device 17 for collecting the filtered cement meeting the standard.

[0031] The end of the conveyor belt 13 is located at the head end of an elevator 18. A number of baffles 19 are installed on the elevator 18 to facilitate the upward movement and transportation of cement. The upper end of the elevator 18 is located above a trough 20, and the trough 20 is connected to the upper end of the pulverizer 1.

[0032] The elevator 18 and the baffles 19 are both prior arts and will not be elaborated here.

[0033] The elliptical roller 15, the conveyor belt 13, the rotating roller 6, and the elevator 18 are respectively driven by different motors to rotate, which are prior arts and will not be elaborated here.

[0034] A comb plate 21 is hinged at the outlet 2. The spacing between the teeth of the comb plate 21 is equivalent to the particle size of qualified cement. That is to say, the qualified cement can be filtered out. At this time, one side of the groove 7 is arc-shaped. When the rotating roller 6 rotates, it passes through this arc-shaped side later. Normally, the maximum downward rotation angle of the comb plate 21 is not greater than 1°.

[0035] The tail end of the comb plate 21 is preferably tilted upward so that the arc-shaped side of the groove 7 can lift the comb plate 21 to enable the smooth rotation of the rotating roller 6.

[0036] The dispersion device, the conveyor belt 13, the elevator 18, and the trough 20 can all be equipped with protective covers to prevent dust from flying. The protective covers can be set in sections and can be opened for easy maintenance. (The protective cover is a prior art and not shown in the figure).

[0037] The distributor hopper 16 and the collection device 17 can also be equipped with protective covers.

[0038] The working process is as follows: During the operation of the equipment, the motor 9 drives the coarse filter plate 3 to rotate. The pulverized cement (carrying some slightly larger particles) falls onto the outlet 2 through the coarse filter plate 3, and then falls into the groove 7 of the rotating roller 6 from the outlet 2. The rotating roller 6 rotates, and the groove 7 is successively filled and then falls at the discharge port 5. During the process of loading cement, while loading, the rotating roller 6 rotates. The comb plate 21 fishes out the large particles on the surface of the cement and is lifted by the arc-shaped side to not affect the rotation of the rotating roller 6. The cement coming out of the discharge port 5 is dispersed by the dispersion device and scattered on the conveyor belt 13 to avoid accumulation. Under the successive vibration of the elliptical roller 15, the cement with the standard particle size is vibrated down, enters the collection device 17 through the distributor hopper 16, and the remaining oversized cement enters the conveyor belt 13, the elevator 18, and the trough 20 and then returns to the pulverizer 1 for further pulverization.

[0039] In the present invention, the terms "first", "second", "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance; the term "plural" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed" should all be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0041] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0043] Except for the technical features described in the specification, the remaining technical features are all known to those skilled in the art.

Claims

1. A powder selecting device for an efficient cement powder mill, comprising a powder mill (1), characterized in that, The lower end of the pulverizer (1) is provided with an outlet (2). Above the outlet (2), there is a coarse filter plate (3). At the outlet (2), there is a horizontally placed arc-shaped cylinder (4). Inside the arc-shaped cylinder (4), a rotating roller (6) is installed. A number of grooves (7) are formed on the rotating roller (6). The lower end of the arc-shaped cylinder (4) is provided with a discharge port (5). The discharge port (5) is located above a conveyor belt (13). A dispersing device is provided between the conveyor belt (13) and the discharge port (5). The tail end of the conveyor belt (13) is located above the lower end of the elevator 18. The upper end of the elevator (18) is located above the material trough (20). The material trough (20) is connected to the pulverizer (1). Inside the annular conveyor belt (13), there is a material distribution hopper (16) and a number of linked elliptical rollers (15). The planes where the major axes of all the elliptical rollers (15) are located are not parallel to each other. A collecting device (17) is provided below the material distribution hopper (16). The conveyor belt (13) is provided with leakage holes (14).

2. The powder selection device of the high-efficiency cement powder mill according to claim 1, characterized in that, A transverse cylinder (22) passes through the outlet (2). Inside the transverse cylinder (22), there is a rotating shaft (8). The upper end of the rotating shaft (8) is fixedly connected to the coarse filter plate (3). The coarse filter plate (3) is rotatably connected to the pulverizer (1). The rotating shaft (8) is driven to rotate by a motor (9).

3. The powder selecting device of the high-efficiency cement mill according to claim 2, characterized in that, The dispersing device includes an inverted funnel (11). A number of spiral plates (12) are provided on the surface of the funnel (11).

4. The powder selecting device of the high-efficiency cement powder mill according to claim 3, characterized in that, There are two arc-shaped cylinders (4). Each arc-shaped cylinder (4) contains a rotating roller (6). The two rotating rollers (6) are linked by gear meshing.

5. The powder selecting device of the high-efficiency cement pulverizer according to claim 4, characterized in that, The lower end of the rotating shaft (8) is fixedly connected to the funnel (11).

6. The powder selecting device of the high-efficiency cement mill according to claim 1, characterized in that The dispersing device is two inclined plates (10) forming an inverted V shape.

7. The powder selection device of the high-efficiency cement mill according to claims 1 to 6, characterized in that, A comb-shaped plate (21) is hinged at the outlet (2). One side of the groove (7) is arc-shaped. During the rotation of the rotating roller (6), the arc-shaped side passes by the comb-shaped plate (21) later. The downward rotation angle of the comb-shaped plate (21) is not greater than 1°.

8. The powder selecting device of the high-efficiency cement powder mill 1 according to claim 7, characterized in that, The tail end of the comb-shaped plate (21) tilts upward.

9. The powder selecting device of the high-efficiency cement mill according to claim 1, characterized in that, The cross-section of the groove (7) is an inverted trapezoid.

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