A cement powder pre-dispersing and feeding device

Abstract

This application relates to the field of cement pre-grinding technology and discloses a cement powder pre-dispersing feeding device. By setting a feeding cylinder at the main feeding port of the air classifier, and installing an intermittent feeding assembly connected to the feeding cylinder via multiple feeding pipes, material is fed into the feeding cylinder. The material's movement direction after entering the feeding cylinder is opposite to the movement direction of the impact hammer and impact plate, allowing the material to impact the impact hammer at a greater relative velocity, thus quickly dispersing the material. Furthermore, this application sets an impact hammer inside the feeding cylinder and an impact plate around the impact hammer. The impact hammer is driven by a first motor, allowing the material to impact the impact hammer after entering the feeding cylinder, breaking up any clumps. This effectively reduces the agglomeration of material entering the V-shaped air classifier, thereby reducing the workload inside the V-shaped air classifier and improving its efficiency.

Description

Technical Field

[0001] This application relates to the field of cement pre-grinding technology, specifically to a cement powder pre-dispersing and feeding device. Background Technology

[0002] V-type air classifiers are a type of static air classifier commonly used in cement production. They are mainly used for the preliminary classification of raw materials or cement grinding. Their main functions are to break up the material cake, classify the powder, and dry it. Their classification efficiency is mainly related to factors such as wind speed, air volume, feed concentration, and feed uniformity.

[0003] In the existing technology, because the coarse powder contains a large amount of fine powder and there is a clumping phenomenon, the V-type air classifier has a large circulating load, poor sorting efficiency, high working load of the dispersing plate, and the clumping cannot be dispersed in time. It is necessary to frequently collect and process the coarse powder collected at the bottom of the air classifier or lift it to the top of the equipment for re-sorting, which reduces the working efficiency of the air classifier. Utility Model Content

[0004] In view of the above problems, this application provides a cement powder pre-dispersing feeding device, which can effectively reduce the agglomeration of materials entering the V-shaped classifier, thereby reducing the workload inside the V-shaped classifier and improving working efficiency.

[0005] According to one aspect of the embodiments of this application, a cement powder pre-dispersing and feeding device is provided. The cement powder pre-dispersing and feeding device includes an air classifier body, an air inlet, a coarse powder outlet, an air-powder outlet, and a feeding port connected to the air classifier body. A feeding cylinder is connected to the top of the feeding port. An intermittent feeding component for feeding material into the feeding cylinder is provided at the top of the feeding cylinder. A conical hammer is provided at the central axis inside the feeding cylinder. Multiple striking plates are arranged around the outer side wall of the hammer. A first motor is provided at the top of the feeding cylinder. The first motor is drivenly connected to an output shaft. The output shaft passes through the inside of the feeding cylinder and is drivenly connected to the top of the hammer. The intermittent feeding component is connected to the feeding cylinder through multiple feeding pipes. The bottom end of the feeding pipe is inclined and faces the outer side wall of the hammer so that the feeding direction of the feeding pipe is opposite to the rotation direction of the hammer.

[0006] In some embodiments, the intermittent feeding assembly includes a storage hopper, the top end of the feeding pipe is connected to the bottom of the storage hopper, a circular baffle is rotatably provided on the inner bottom wall of the storage hopper, at least one notch is provided on the outer edge of the baffle, and a second motor is connected to the top of the storage hopper by a rod, the second motor being coaxially connected to the baffle.

[0007] In some embodiments, there are two notches, and the two notches are symmetrically arranged on the baffle plate.

[0008] In some embodiments, two S-shaped material guide plates are symmetrically arranged on the baffle plate. One end of the material guide plate is fixed at the center of the baffle plate, and the other end extends outward along the radius of the baffle plate and bends in an arc. The bending direction of the baffle plate is consistent with the rotation direction of the baffle plate.

[0009] In some embodiments, a protective sleeve is provided on the inner wall of the feeding cylinder, and the protective sleeve is arranged around the outer periphery of the striking hammer.

[0010] In some embodiments, the inside of the feeding cylinder, below the protective sleeve, is provided with a guide cone whose lower inner cavity gradually narrows, and the outer wall of the guide cone is tightly attached to and fixed to the inner wall of the feeding cylinder.

[0011] The beneficial effects of this application are as follows: In this application, by setting a feeding cylinder at the main feeding port of the air classifier, setting an intermittent feeding assembly, and connecting it to the feeding cylinder via multiple feeding pipes to feed material into the feeding cylinder, the intermittent feeding assembly can feed material through multiple feeding pipes while the feeding cylinder changes the flow direction of the material, making the movement direction of the material after entering the feeding cylinder opposite to the movement direction of the impact hammer and impact plate. This allows the material to impact the impact hammer at a greater relative speed, quickly breaking up the material. On the other hand, by setting an impact hammer inside the feeding cylinder and an impact plate around the impact hammer, and driving the impact hammer with a first motor, the material entering the feeding cylinder can impact the impact hammer, breaking up any clumps of material. This effectively reduces the agglomeration of material entering the V-shaped air classifier, thereby reducing the workload inside the V-shaped air classifier and improving its efficiency.

[0012] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0013] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the device provided in the embodiments of this application; Figure 2 This is a partial half-section structural diagram of the feeding cylinder and its connecting components provided in the embodiments of this application.

[0014] The reference numerals in the detailed embodiments are as follows: Cement powder pre-dispersing and feeding device 100, air classifier body 110, air inlet 111, coarse powder outlet 112, feeding port 113, air-powder outlet 114, feeding cylinder 120, protective sleeve 121, guide cone 122, intermittent feeding assembly 130, feeding pipe 131, storage hopper 132, baffle plate 133, notch 133a, material pushing plate 133b, second motor 134, hammer 140, striking plate 141, first motor 150, output shaft 151. Detailed Implementation

[0015] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0016] For details, please refer to Figures 1 to 2 , Figure 1 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application. Figure 2This is a partial half-sectional structural diagram of the feeding cylinder and its connecting components provided in an embodiment of this application. The cement powder pre-dispersing feeding device 100 includes a classifier body 110, which is connected to an air inlet 111, a coarse powder outlet 112, an air-powder outlet 114, and a feeding inlet 113. The material enters through the feeding inlet 113, and the material can be cement raw meal, coal powder, etc. The air inlet 111 is connected to an external fan to provide an upward airflow for separating fine powder. Coarse particles that do not meet the fineness requirements are discharged through the coarse powder outlet 112 and returned to the mill for re-grinding. The airflow carrying fine powder enters the subsequent dust collection equipment (such as a cyclone separator) through the air-powder outlet 114. The above structures are all existing structures and have been fully disclosed, and will not be described in detail here. A feeding cylinder 120 is connected to the top of the feeding port 113. An intermittent feeding assembly 130 is located at the top of the feeding cylinder 120 for feeding material into the feeding cylinder 120. The intermittent feeding assembly 130 is typically connected to a hoist, which feeds material into the intermittent feeding assembly 130, which in turn feeds material into the feeding cylinder 120. After initial dispersing the material, the feeding cylinder 120 guides the material into the classifier body 110 for further processing. A conical hammer 140 is located at the central axis inside the feeding cylinder 120. The hammer 140 strikes the material and breaks up any clumps. Multiple striking plates 141 are arranged circumferentially around the outer wall of the hammer 140. These striking plates 141 increase the contact area with the material and prevent the material from slipping on the outer surface of the hammer 140, thus ensuring rapid dispersal. A first motor 150 is installed at the top of the feeding cylinder 120. The first motor 150 is connected to an output shaft 151. The output shaft 151 passes through the inside of the feeding cylinder 120 and is connected to the top of the hammer 140. The first motor 150 can drive the hammer 140 to rotate through the output shaft 151, thereby breaking up the material. The intermittent feeding assembly 130 is connected to the feeding cylinder 120 through multiple feeding pipes 131. The bottom end of the feeding pipe 131 is inclined and faces the outer wall of the hammer 140 so that the feeding direction of the feeding pipe 131 is opposite to the rotation direction of the hammer 140. The material in the intermittent feeding assembly 130 is introduced into the feeding cylinder 120 through the feeding pipe 131. The inclination of the bottom end of the feeding pipe 131 is used to correct the flow direction of the material, so that the material moves in a parabolic trajectory after leaving the feeding pipe 131. This trajectory is opposite to the movement direction of the hammer 140, so that the agglomerated material moves towards the hammer 140 and the impact plate 141, thereby generating a strong impact to quickly break up the material.

[0017] In summary, in this application, by setting a feeding cylinder 120 at the feeding port 113 of the powder classifier body 110, setting an intermittent feeding component 130 and connecting it to the feeding cylinder 120 through multiple feeding pipes 131 to feed material to the feeding cylinder 120, the intermittent feeding component 130 can feed material through multiple feeding pipes 131 while the feeding cylinder 120 changes the flow direction of the material so that the movement direction of the material after entering the feeding cylinder 120 is opposite to the movement direction of the impact hammer 140 and the impact plate 141, thereby enabling the material to impact the impact hammer 140 with a greater relative speed to quickly disperse the material. On the other hand, this application provides an impact hammer 140 inside the feeding cylinder 120 and an impact plate 141 around the impact hammer 140. The impact hammer 140 is driven by a first motor 150, so that the material can collide with the impact hammer 140 after entering the feeding cylinder 120, thereby breaking up the agglomerated material. This can effectively reduce the agglomeration of the material entering the V-shaped classifier, thereby reducing the workload inside the V-shaped classifier and improving the working efficiency.

[0018] In some embodiments, the intermittent feeding assembly 130 includes a storage hopper 132, the top end of the feeding pipe 131 is connected to the bottom of the storage hopper 132, a circular baffle plate 133 is rotatably provided on the inner bottom wall of the storage hopper 132, at least one notch 133a is provided on the outer edge of the baffle plate 133, and a second motor 134 is connected to the top of the storage hopper 132 by a rod, and the second motor 134 is coaxially connected to the baffle plate 133. This application proposes a specific configuration of an intermittent feeding assembly 130. A second motor 134 drives a rod, which in turn drives a baffle plate 133 to rotate. The baffle plate 133 can prevent material inside the storage hopper 132 from entering the feeding pipe 131. During rotation, when the notch 133a is aligned with the feeding pipe 131, the material inside the storage hopper 132 is not blocked by the baffle plate 133 and enters the feeding pipe 131 and further enters the feeding cylinder 120. The material is fed alternately through the feeding pipes 131, making the feeding process stable and uniform.

[0019] In some embodiments, there are two notches 133a, which are symmetrically arranged on the baffle plate 133. By setting two notches 133a in this embodiment, the feeding speed is increased on the one hand, and the two notches 133a are symmetrical on the other hand, so that the two feeding pipes 131 in the feeding state can symmetrically guide the material to the symmetrical sides of the hammer 140, avoiding the phenomenon of mutual interference between materials due to concentrated feeding on one side.

[0020] In some embodiments, two S-shaped material-pushing plates 133b are symmetrically arranged on the baffle plate 133. One end of the material-pushing plate 133b is fixed to the center of the baffle plate 133, and the other end extends outward along the radial direction of the baffle plate 133 and bends in an arc. The bending direction of the baffle plate is consistent with the rotation direction of the baffle plate 133. In this application, by setting the material-pushing plate 133b, the material-pushing plate 133b can push the inside of the storage hopper 132 to rotate as it rotates with the baffle plate 133, thereby pushing the material to the notch 133a, which facilitates the material discharge.

[0021] In some embodiments, a protective sleeve 121 is provided on the inner wall of the feeding cylinder 120, and the protective sleeve 121 surrounds the outer periphery of the impact hammer 140. In this embodiment, the protective sleeve 121 is provided to increase the structural strength of the feeding cylinder 120 and avoid or reduce the loss caused by the high-frequency impact of materials on the inner wall of the feeding cylinder 120.

[0022] In some embodiments, a guide cone 122 with a gradually narrowing lower cavity is disposed inside the feeding cylinder 120 below the protective sleeve 121. The outer wall of the guide cone 122 is tightly attached to and fixed to the inner wall of the feeding cylinder 120. In this embodiment, after the material is initially dispersed inside the feeding cylinder 120, it continuously falls into the guide cone 122 and slides down along the side wall of the guide cone 122. During the sliding process, the material will gather and fall into the body 110 of the classifier.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although the foregoing embodiments have provided a detailed description of this application, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cement powder pre-dispersing and feeding device, characterized in that, The system includes a classifier body, which is connected to an air inlet, a coarse powder outlet, an air-powder outlet, and a feeding port. A feeding cylinder is connected to the top of the feeding port, and an intermittent feeding component for feeding material into the feeding cylinder is provided at the top of the feeding cylinder. A conical hammer is installed at the central axis inside the feeding cylinder. Multiple striking plates are arranged around the outer side wall of the hammer. A first motor is installed at the top of the feeding cylinder. The first motor is driven and connected to an output shaft. The output shaft passes through the inside of the feeding cylinder and is driven and connected to the top of the hammer. The intermittent feeding assembly is connected to the feeding cylinder through multiple feeding pipes. The bottom end of the feeding pipe is inclined and faces the outer side wall of the hammer so that the feeding direction of the feeding pipe is opposite to the rotation direction of the hammer.

2. The cement powder pre-dispersing and feeding device according to claim 1, characterized in that, The intermittent feeding assembly includes a storage hopper, the top end of the feeding pipe is connected to the bottom of the storage hopper, a circular baffle is rotatably provided on the inner bottom wall of the storage hopper, at least one notch is provided on the outer edge of the baffle, and a second motor is connected to the top of the storage hopper by a rod, the second motor being coaxially connected to the baffle.

3. The cement powder pre-dispersing and feeding device according to claim 2, characterized in that, There are two notches, and the two notches are symmetrically arranged on the baffle plate.

4. The cement powder pre-dispersing and feeding device according to claim 3, characterized in that, Two S-shaped material-pushing plates are symmetrically arranged on the baffle plate. One end of the material-pushing plate is fixed at the center of the baffle plate, and the other end extends outward along the radius of the baffle plate and bends in an arc. The bending direction of the baffle plate is consistent with the rotation direction of the baffle plate.

5. The cement powder pre-dispersing and feeding device according to claim 1, characterized in that, A protective sleeve is provided on the inner wall of the feeding cylinder, and the protective sleeve is arranged around the outer periphery of the striking hammer.

6. The cement powder pre-dispersing and feeding device according to claim 5, characterized in that, Inside the feeding cylinder, below the protective sleeve, there is a guide cone with a gradually narrowing lower cavity. The outer wall of the guide cone is tightly attached to and fixed to the inner wall of the feeding cylinder.

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