Cement flour mill

Abstract

The utility model provides a cement grinding mill, which relates to the technical field of cement grinding mills and comprises a known grinding mill for grinding cement and a screening box arranged at a discharge port of the grinding mill. The lifting frame comprises two groups of opposite inner side walls which are distributed in an up-down staggered mode, the opposite inner side wall located on the upper portion is rotationally connected with the lower-layer filter plate, the impurity box is arranged below the lower-layer filter plate, therefore, under the condition that the lifting frame does not descend, materials can stay on the surface of the lower-layer filter plate all the time, the staying time of the materials is prolonged, and the service life of the materials is prolonged. The rotating shaft drives the two eccentric wheels to rotate, and the side edges of the eccentric wheels can push the lower-layer filter plate to swing in a reciprocating mode, so that reciprocating sliding of the materials is achieved by controlling the retention time of the materials and utilizing reciprocating swing of the lower-layer filter plate, and qualified materials can be conveniently accelerated to pass through the lower-layer filter plate to be screened and separated.

Description

TECHNICAL FIELD

[0001] The utility model relates to cement grinding machine technical field especially relates to a cement grinding machine. BACKGROUND

[0002] Cement grinding machine is the key equipment in the cement production process, mainly used for cement clinker (including limestone, clay, iron ore and other raw materials after high temperature calcination formed) and other auxiliary materials (such as gypsum) grinding into fine powder, so as to facilitate the final use of cement.

[0003] Therefore, one kind of cement grinding machine of prior art, the publication number is: CN220048358U, including grinding chamber, feed inlet, discharge outlet, abrasive cone and first motor, the inside of grinding chamber is provided with abrasive cone, and first motor can drive abrasive cone to rotate, the inside of grinding chamber is provided with screen cloth, the bottom end of screen cloth is installed with fixed block, the inside of grinding chamber is provided with mounting rod, the outer surface of mounting rod is uniformly installed with impact block, and impact block and fixed block are mutually matched, in actual use, the screen cloth setting is inclined plane can let the powder that meets the specification directly fall to the discharge outlet, the rest does not meet the specification powder rolls to the recovery chamber, and the vibration generated by the mutual cooperation of fixed block and impact block not only can accelerate the speed of filtration, but also prevent the screen cloth from being blocked by raw material powder, specific operation is, second motor drives mounting rod to rotate, so that impact block and fixed block are mutually matched, and vibration is generated.

[0004] The material that falls through the grinding chamber can slide along the screen surface to the recovery pipeline, but in actual use, the time of powder staying on the screen surface is fixed, so when the number of falling powder is large, a large amount of powder falls on the screen, which is easy to stir up dust and cause a part of powder to enter the collection box along the recovery pipeline, or a part of powder enters the collection box along the recovery pipeline without being filtered due to the fixed staying time, that is, the collection of qualified powder is not complete. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the prior art and provides a cement grinding machine.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a cement grinding machine, including known for cement grinding's grinding machine and the screening box of setting at the discharge gate of grinding machine, the screening box is provided with the lifting frame in, the lifting frame contains two groups of upper and lower misregistration distribution's opposite inner wall and is located the upper opposite inner wall rotation connection has the lower filter plate, the opposite inner wall rotation connection has the pivot in the lower, the length direction of pivot is perpendicular with the length direction of the rotation of lower filter plate and is distributed and the both ends of pivot are all fixed connection has eccentric wheel, two eccentric wheel reverse setting and are used for pushing the reciprocating swing of lower filter plate, the clearance cooperation of one group of opposite side of lower filter plate and screening box inner wall is connected with the elastic cloth between screening box inner wall, the screening box is located the adjacent side of elastic cloth and is provided with the impurity tank, and the impurity tank is located below the lower filter plate.

[0007] Preferably, the bottom edge of the lifting frame is connected to the bottom of the screening box by at least two electric telescopic rods.

[0008] Preferably, the bottom of the impurity tank extends downward to communicate with the inside of the screening box, and a filter screen is arranged at the bottom of the impurity tank.

[0009] Preferably, the upper surface of the lower filter plate is hinged to an upper filter plate on one side near the impurity tank, and a through slot is formed in the upper surface of the lower filter plate on the opposite side, a limiting block is installed below the through slot on one side wall of the screening box, and the limiting block is used to push the upper filter plate to swing upward.

[0010] Preferably, a slope is fixedly connected below the bottom of the impurity tank in the screening box, and a "7"-shaped collection pipe is fixedly connected through the side wall of the screening box at the bottom of the slope, a collection tank is connected to the bottom port of the vertical part of the collection pipe, and an air extractor is arranged through the horizontal part.

[0011] Preferably, the air inlet of the air extractor is located in the collection pipe and has a built-in filter cotton.

[0012] Preferably, a gear ring is fixedly connected to the surface of the pivot, and a gear is rotationally connected to one side wall of the lifting frame and is driven by a motor and engaged with the gear ring.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that,

[0014] 1、In the utility model, the impurity tank is arranged below the lower filter plate, so that the material always stays on the surface of the lower filter plate without the lifting frame being lowered, the residence time of the material is prolonged, the two eccentric wheels are rotated by the pivot, the side of the eccentric wheel can push the lower filter plate to reciprocating swing, the residence time of the material is controlled and the lower filter plate is reciprocating swing to realize the reciprocating sliding of the material, so that the qualified material can pass through the lower filter plate to realize the screening and separation.

[0015] 2、The utility model discloses a limit block and through groove are set up, and the lifting frame drives the lower filter plate and upper filter plate to drop to the limit block through the through groove of lower filter plate side edge, and the non articulation edge of upper filter plate will be contacted with the limit block, and through the interference effect of limit block, when the lower filter plate continues to drop, the corresponding upper filter plate will be inclined, therefore the trapped material on the surface of upper filter plate will slide to the impurity box and realizes the quick collection. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A three-dimensional structure schematic diagram of the cement grinding machine is provided for the utility model;

[0017] Figure 2 A top view structure schematic diagram of the screening box of the cement grinding machine is provided for the utility model;

[0018] Figure 3 A sectional view structure schematic diagram of the cement grinding machine is provided for the utility model; Figure 2

[0019] Figure 4 A top view structure schematic diagram of the cement grinding machine is provided for the utility model; Figure 3

[0020] Legend: 1, screening box, 2, grinding machine, 3, impurity box, 4, collection box, 5, collection pipe, 6, air extractor, 7, filter screen, 8, inclined plate, 9, lower filter plate, 10, elastic cloth, 11, upper filter plate, 12, electric telescopic rod, 13, lifting frame, 14, eccentric wheel, 15, rotating shaft, 16, gear ring, 17, gear, 18, limit block, 19, through groove. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further explained below in combination with the drawings and examples.

[0022] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the utility model is not limited to the specific embodiments disclosed in the following disclosure.

[0023] As Figures 1-4 ​​As shown, a cement grinding machine, including a grinding machine 2 known for cement grinding and a screening box 1 arranged at the discharge port of the grinding machine 2, the specific structure and grinding principle of the grinding machine 2 refer to the grinding cavity of the cement grinding machine disclosed in the background art with publication number: CN220048358U, the lifting frame 13 is arranged in the screening box 1, and the bottom edge of the lifting frame 13 is connected with the bottom of the screening box 1 through at least two electric telescopic rods 12. The electric telescopic rod 12 is used to realize the lifting of the lifting frame 13 in the screening box 1. The lifting frame 13 includes two groups of upper and lower staggered distribution relative inner walls, and the upper relative inner wall is rotatably connected with the lower filter plate 9. The lower relative inner wall is rotatably connected with the rotating shaft 15. The surface of the rotating shaft 15 is fixedly connected with the gear ring 16. One side wall of the lifting frame 13 is rotatably connected with the gear 17 driven by the motor and meshed with the gear ring 16. By installing the motor in the lifting frame 13, the gear 17 can be driven to rotate, so that the meshed gear ring 16 drives the rotating shaft 15 to rotate. The length direction of the rotating shaft 15 is perpendicular to the length direction of the lower filter plate 9, and the two ends of the rotating shaft 15 are fixedly connected with the eccentric wheels 14. The two eccentric wheels 14 are arranged in opposite directions and used to push the lower filter plate 9 to reciprocate. The two eccentric wheels 14 are respectively located on both sides of the rotation point of the lower filter plate 9 and are symmetrically arranged about the rotation point of the lower filter plate 9. Combined with the above Figure 4 When the rotating shaft 15 rotates, the eccentric wheels 14 at both ends will rotate, so the side edge of the eccentric wheel 14 can push the lower filter plate 9 to reciprocate. One group of opposite sides of the lower filter plate 9 is connected with the inner wall of the screening box 1 through the elastic cloth 10. The elastic cloth 10 ensures that the lower filter plate 9 remains horizontal, and when the lower filter plate 9 reciprocates, the corresponding elastic cloth 10 will be elastically stretched, so that the material will not leak from the gap between the lower filter plate 9 and the screening box 1. Therefore, by reciprocating the lower filter plate 9, the material falling on the lower filter plate 9 can be moved reciprocally to prolong the residence time, thereby ensuring the screening result. The screening box 1 is provided with an impurity box 3 at one adjacent side of the elastic cloth 10. The impurity box 3 is located below the lower filter plate 9. The bottom of the impurity box 3 extends downward and communicates with the inside of the screening box 1, and the filter screen 7 is arranged at the bottom of the impurity box 3. Therefore, in the case that the lifting frame 13 does not descend, the material will always stay on the surface of the lower filter plate 9. Only after the screening is completed, the lower filter plate 9 can be lowered to the impurity box 3 by lowering the lifting frame 13 to realize the discharge of the screened impurities. The filter screen 7 arranged in the impurity box 3 can further screen the impurities in the impurity box 3.

[0024] Further: the upper surface of the lower filter plate 9 is hinged with the upper filter plate 11 on one side of the impurity box 3, and the upper surface of the lower filter plate 9 is provided with a through slot 19 on the other side; a limiting block 18 is arranged below the through slot 19 on one side wall of the screening box 1; the limiting block 18 is used to push the upper filter plate 11 to swing; the upper filter plate 11 is arranged to be the same size as the lower filter plate 9, so that the filtered material is retained on the surface of the upper filter plate 11; because the upper filter plate 11 is in a horizontal state, when the lower filter plate 9 and the upper filter plate 11 are lowered to the position where the limiting block 18 passes through the through slot 19 on the side of the lower filter plate 9, the non-hinged edge of the upper filter plate 11 is in contact with the limiting block 18; and through the interference action of the limiting block 18, when the lower filter plate 9 continues to descend, the corresponding upper filter plate 11 will tilt, so that the retained material on the surface of the upper filter plate 11 will slide into the impurity box 3 to realize rapid collection and discharge.

[0025] Further: the screening box 1 is fixedly connected with an inclined plate 8 below the bottom of the impurity box 3, and a "7" shaped collecting pipe 5 is fixedly connected through the wall on one side of the bottom edge of the inclined plate 8; the vertical part of the collecting pipe 5 is connected with a collecting box 4 at the bottom port; the material filtered through the upper filter plate 11 and the lower filter plate 9 falls on the surface of the inclined plate 8, slides downward on the inclined surface to the collecting pipe 5, and enters the collecting box 4 through the collecting pipe 5 to be stored; the horizontal part is provided with an exhaust fan 6; the air inlet of the exhaust fan 6 is located in the collecting pipe 5 and is provided with a filter cotton; the suction force generated by the exhaust fan 6 can realize that the dust generated in the screening process moves downward along the airflow and enters the collecting pipe 5, but the filter cotton arranged at the air inlet of the exhaust fan 6 can prevent the powdery material from being blown out of the collecting pipe 5.

[0026] Working principle: the material is ground by the flour mill 2 and then enters the screening box 1, falls on the surface of the upper filter plate 11 in the screening box 1, and is screened under the action of the upper filter plate 11 and the lower filter plate 9; the screened material falls on the inclined plate 8, then slides into the collecting pipe 5 and finally enters the collecting box 4; the impurities retained on the upper filter plate 11 are lifted by the contraction of the electric telescopic rod 12, so that the lower filter plate 9 and the upper filter plate 11 are lowered; when the lower filter plate 9 passes through the limiting block 18, the limiting block 18 pushes the upper filter plate 11 to tilt with the continuous descent of the lower filter plate 9, so that the impurities on the surface of the upper filter plate 11 slide along the inclined upper filter plate 11 and are collected in the impurity box 3.

[0027] The wiring diagram of the flour mill 2, the electric telescopic rod 12, the exhaust fan 6 and the motor in the utility model belongs to the common knowledge in the field, and its working principle is a well-known technology; the type is selected according to actual use; therefore, the control mode and wiring arrangement of the flour mill 2, the electric telescopic rod 12, the exhaust fan 6 and the motor are not explained in detail.

[0028] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A cement mill comprising a mill (2) known for grinding of cement and a screening box (1) arranged at the discharge of the mill (2), characterized in that: The screening box (1) is provided with a lifting frame (13), two groups of upper and lower staggered distribution opposite inner walls are arranged on the lifting frame (13), the opposite inner wall above is rotationally connected with a lower filter plate (9), the opposite inner wall below is rotationally connected with a rotating shaft (15), the length direction of the rotating shaft (15) is perpendicular to the rotating direction of the lower filter plate (9), and the both ends of the rotating shaft (15) are fixedly connected with eccentric wheels (14), the two eccentric wheels (14) are arranged in opposite directions and used for reciprocatingly swinging the lower filter plate (9), one group of opposite sides of the lower filter plate (9) is connected with the inner wall of the screening box (1) through elastic cloth (10), and the screening box (1) is provided with an impurity box (3) on one adjacent side of the elastic cloth (10), and the impurity box (3) is located below the lower filter plate (9).

2. The cement mill defined in claim 1, wherein: The bottom edge of the lifting frame (13) is connected with the bottom of the screening box (1) through at least two electric telescopic rods (12).

3. The cement mill defined in claim 1, wherein: The bottom of the impurity box (3) extends downward and communicates with the inside of the screening box (1), and the filter screen (7) is arranged at the bottom of the impurity box (3).

4. The cement mill defined in claim 1, wherein: The upper surface of the lower filter plate (9) is hingedly connected with an upper filter plate (11) on one side close to the impurity box (3), and the upper surface of the lower filter plate (9) is provided with a through groove (19) on the opposite side, a limiting block (18) is mounted on the box wall of the screening box (1) below the through groove (19), and the limiting block (18) is used for pushing the upper filter plate (11) to be raised.

5. The cement mill defined in claim 1, wherein: The screening box (1) is fixedly connected with an inclined plate (8) below the bottom of the impurity box (3), and the box wall of the screening box (1) on one side of the bottom edge of the inclined plate (8) is fixedly connected with a "7" shaped collecting pipe (5), the vertical part of the collecting pipe (5) is connected with a collecting box (4) at the bottom end, and the horizontal part is provided with an air extractor (6).

6. The cement mill defined in claim 5, wherein: The air inlet of the air extractor (6) is located in the collecting pipe (5) and is provided with filter cotton.

7. The cement mill defined in claim 1, wherein: The surface of the rotating shaft (15) is fixedly connected with a gear ring (16), one side of the inner wall of the lifting frame (13) is rotationally connected with a gear (17) driven by a motor and engaged with the gear ring (16).

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