Mixing and grinding device for cement raw materials

Abstract

The utility model relates to the technical field of cement raw material grinding, and discloses a cement raw material mixing and grinding device which comprises a support frame and a ball mill main body arranged at the upper end of the support frame, a discharge port is communicated with an inner cavity of the ball mill main body, an outer cylinder main body is fixedly connected to the inner wall of the discharge port, and an inner cylinder main body is arranged on the inner wall of the outer cylinder main body in a sliding manner; the inner wall of the ball mill main body is in shaft connection with a first baffle plate and a second baffle plate, an electric push rod is mounted on the outer wall of the external mounting plate, and the output end of the electric push rod is fixedly connected with a bearing plate; the bearing plate pushes the inner cylinder body to move downwards along the outer cylinder body fixed to the inner wall of the discharging opening, the inner cylinder body synchronously pulls the first baffle and the second baffle which are coupled to the inner wall of the ball mill body to turn over towards the two sides through the first pull rod and the second pull rod which are coupled, a discharging channel is opened, and a screw fixing structure of a traditional discharging plate is thoroughly abandoned.

Description

Technical Field

[0001] This utility model relates to the field of cement raw material grinding technology, and in particular to a mixing and grinding device for cement raw materials. Background Technology

[0002] In the raw material preparation stage of cement production, the mixing and grinding unit is the core equipment for achieving uniform mixing and grinding of multi-component raw materials such as limestone, silica, iron ore, fly ash, and carbide slag. Among these, ball mills have become the mainstream choice in the industry due to their mature structure and strong adaptability. The unloading system of this type of ball mill is a crucial link connecting grinding with subsequent sorting and homogenization processes; its operational stability directly affects production efficiency, product quality, and maintenance costs. Currently, most mainstream ball mills on the market use detachable unloading plates as the core unloading component. However, the unloading plate needs to be secured with multiple sets of screws to ensure its stability. This means that each disassembly or replacement requires manual operation, cleaning the dust and hardened dust from the screw gaps. Each maintenance session is too time-consuming, seriously affecting the continuous production of cement. Utility Model Content

[0003] The technical problem to be solved by this utility model is that the existing technology requires manual operation to remove the unloading plate one by one and clean the dust hardening in the screw gaps each time it is disassembled or replaced. The maintenance time is too long and seriously affects the continuous production of cement. To this end, we propose a cement raw material mixing and grinding device.

[0004] To achieve the above objectives, this application adopts the following technical solution: a cement raw material mixing and grinding device, comprising a support frame and a ball mill body installed on the upper end of the support frame. The outer wall of the ball mill body is provided with a discharge assembly, which includes a discharge port opened on the outer wall of the ball mill body and an outer mounting plate fixedly installed on the outer wall of the ball mill body. The discharge port communicates with the inner cavity of the ball mill body. An outer cylinder body is fixedly connected to the inner wall of the discharge port, and an inner cylinder body is slidably disposed on the inner wall of the outer cylinder body. A first baffle and a second baffle are axially connected to the inner wall. The first baffle and the second baffle are symmetrically distributed about the center of the discharge port. A first pull rod is axially connected to one side of the first baffle, and a second pull rod is axially connected to one side of the second baffle. The end of the first pull rod away from the first baffle is axially connected to the inner wall of the inner cylinder body, and the end of the second pull rod away from the second baffle is axially connected to the inner wall of the inner cylinder body. An electric push rod is installed on the outer wall of the outer plate. A receiving plate is fixedly connected to the output end of the electric push rod, and the receiving plate is fixedly connected to the inner cylinder body.

[0005] Furthermore, a baffle plate is provided on the side of the first baffle and the second baffle away from the first tie rod and the second tie rod, for blocking the spherical grinding media of the ball mill body.

[0006] Furthermore, a screening screen body is installed on the inner wall of the inner cylinder body for screening the cement raw material powder during unloading.

[0007] Furthermore, the inner wall of the inner cylinder body is provided with a movable channel, and a slider body is slidably connected to the inner wall of the movable channel. The outer wall of the slider body is fixedly connected to the screening screen body.

[0008] Furthermore, one end of the slider body has an opening, and an inner connecting rod is slidably connected to the inner wall of the opening. The lower end of the inner connecting rod is fixedly connected to the inner wall of the movable channel. A return spring is sleeved on the outer wall of the inner connecting rod. One end of the return spring is fixedly connected to the slider body, and the other end of the return spring is fixedly connected to the inner wall of the movable channel.

[0009] Furthermore, a power unit is fixedly connected to one end of the ball mill body, and a feed pipe is provided at the end of the ball mill body away from the power unit. A threaded guide plate is fixedly connected to the inner wall of the feed pipe.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] In this invention, during unloading, the ball mill body rotates the unloading port to the lower end, and the electric push rod on the outer plate extends, pushing the inner cylinder body along the inner wall of the unloading port to move downward through the receiving plate. The inner cylinder body, through the first and second tie rods connected by shafts, simultaneously pulls the first and second baffles connected by shafts on the inner wall of the ball mill body to flip to both sides, opening the unloading channel. After unloading is completed, the electric push rod retracts, driving the inner cylinder body to move upward, and the first and second baffles reset and close. This completely eliminates the screw fixing structure of the traditional unloading plate, solving the problem that the unloading plate needs to be fixed with multiple sets of screws to ensure its stability. This means that each disassembly or replacement requires manual operation and cleaning of the dust and hardened particles in the screw gaps, resulting in excessively long maintenance time and seriously affecting the continuous production of cement. Attached Figure Description

[0012] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0015] Figure 3 This is a schematic diagram of the unloading assembly structure of this utility model;

[0016] Figure 4 For the present utility model Figure 3 A magnified structural diagram at point A.

[0017] Legend: 1. Support frame; 2. Ball mill body; 3. Discharge assembly; 31. Discharge port; 32. Outer plate; 33. Outer cylinder body; 34. Inner cylinder body; 35. First baffle; 36. Second baffle; 37. First tie rod; 38. Second tie rod; 39. Electric push rod; 310. Receiving plate; 311. Baffle plate; 312. Screening screen body; 313. Movable channel; 314. Slider body; 315. Inner connecting rod; 316. Return spring; 4. Feed pipe; 5. Threaded guide plate. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0019] Reference Figures 1-4 As shown, to address the issue that the unloading plate requires multiple sets of screws for stability, necessitating manual operation and cleaning of dust and hardened particles from the screw gaps each time it is disassembled or replaced, resulting in excessively long maintenance times and severely impacting continuous cement production, the following preferred technical solution is provided:

[0020] A cement raw material mixing and grinding device includes a support frame 1 and a ball mill body 2 installed on the upper end of the support frame 1. The outer wall of the ball mill body 2 is provided with a discharge assembly 3, one end of which is fixedly connected to a power unit that provides grinding power, and the other end is provided with a feed pipe 4. A threaded guide plate 5 is fixedly connected to the inner wall of the feed pipe 4. When the raw material enters, the threaded guide plate 5 can evenly guide the cement raw material into the grinding chamber of the ball mill body 2 through a spiral propulsion action. As a core improved structure, the unloading assembly 3 completely abandons the traditional screw fixing mode and achieves automatic opening and closing through a linkage mechanism. The unloading assembly 3 includes an unloading port 31 opened on the outer wall of the ball mill body 2, and an outer mounting plate 32 fixedly installed on the outer wall of the ball mill body 2. The unloading port 31 is connected to the inner cavity of the ball mill body 2. An outer cylinder body 33 is fixedly connected to the inner wall of the unloading port 31. An inner cylinder body 34 is slidably arranged on the inner wall of the outer cylinder body 33, forming an axially sliding nested channel structure. A first baffle 35 and a second baffle 36 are axially connected to the inner wall of the ball mill body 2, and the centers of the two are aligned with the unloading port 31. The components, including the inner cylinder, the pull rod, and the baffle, form a closed section of the unloading channel. A first pull rod 37 is shaft-connected to one side of the first baffle 35, and a second pull rod 38 is shaft-connected to one side of the second baffle 36. The end of the first pull rod 37 away from the first baffle 35 is shaft-connected to the inner wall of the inner cylinder body 34, and the end of the second pull rod 38 away from the second baffle 36 is also shaft-connected to the inner wall of the inner cylinder body 34, forming a rigid linkage system of the inner cylinder, pull rod, and baffle. An electric push rod 39 is installed on the outer wall of the outer plate 32, and a receiving plate 310 is fixedly connected to its output end. The receiving plate 310 is fixedly connected to the inner cylinder body 34, forming a drive power transmission chain. When unloading is required, the electric actuator 39 extends, pushing the inner cylinder body 34 down along the inner wall of the outer cylinder body 33 via the receiving plate 310. At this time, the first pull rod 37 and the second pull rod 38 are pulled simultaneously, causing the first baffle 35 and the second baffle 36 to flip to both sides, automatically opening the unloading channel. After unloading is completed, the electric actuator 39 retracts, the inner cylinder body 34 moves up, causing the first baffle 35 and the second baffle 36 to reset and close. The entire process does not require disassembling any screws, completely eliminating the need for manual operation and cleaning of hardened dust, effectively ensuring continuous cement production.

[0021] To prevent the spherical grinding media from leaking out of the discharge port 31 during the grinding process, a baffle plate 311 is provided on the side of the first baffle plate 35 and the second baffle plate 36 away from the first tie rod 37 and the second tie rod 38. The baffle plate 311 is a fixed mesh structure that only allows cement raw materials to pass through and can effectively prevent the spherical grinding media from entering the discharge port 31.

[0022] The inner wall of the inner cylinder body 34 is equipped with a screening screen body 312. During unloading, the cement raw material powder needs to be filtered through the screening screen body 312 before being discharged. This allows for real-time screening of products that meet the particle size standards, eliminating the need for a separate subsequent screening process and improving the continuity of the production process. Simultaneously, the inner wall of the inner cylinder body 34 has an active channel 313. A slider body 314 is slidably connected to the inner wall of the active channel 313. The outer wall of the slider body 314 is fixedly connected to the screening screen body 312. One end of the slider body 314 has an opening, and an inner connecting rod 315 is slidably connected to the inner wall of the opening. The lower end of the inner connecting rod 315 is fixedly connected to the inner wall of the active channel 313, and a return spring 316 is sleeved on its outer wall. One end of the return spring 316 is fixedly connected to the slider body 314, and the other end is fixedly connected to the inner wall of the active channel 313. This structure enables the screening screen body 312 to have elastic vibration function. When the material passes through the screening screen body 312, the force generated by the impact of the particles drives the slider body 314 to slide up and down along the active channel 313. The extension and retraction of the return spring 316 converts this sliding into high-frequency micro-amplitude vibration of the screening screen body 312, which can effectively prevent dust from hardening and clogging at the mesh, maintain the stability of screening efficiency, and reduce the number of downtimes caused by cleaning the mesh.

[0023] Specifically, during operation, cement raw materials enter through the feed pipe 4 and are spirally guided by the threaded guide plate 5 fixed on the inner wall, and evenly conveyed to the grinding chamber of the ball mill body 2. Driven by the power unit, the ball mill body 2 rotates as a whole. The spherical grinding media in the grinding chamber are lifted to a certain height and then fall as the cylinder rotates. Through impact, extrusion, and grinding, the cement raw materials are crushed and ground. When the grinding meets the requirements, the ball mill body 2 drives the discharge port 31 to the lower end, and the electric push rod 39 on the outer plate 32 extends. Through the receiving plate 310, it pushes the inner cylinder body 34 to move down along the outer cylinder body 33 fixed on the inner wall of the discharge port 31. The body 34, through the first tie rod 37 and the second tie rod 38 connected by shafts, synchronously pulls the first baffle 35 and the second baffle 36 connected by shafts on the inner wall of the ball mill body 2 to flip to both sides, opening the unloading channel. At this time, the baffle plate 311 fixed on the inner side of the baffle acts as a static barrier, preventing the spherical grinding media from entering the channel with the material, allowing only the ground cement powder to pass through. After the powder enters the inner cylinder body 34, it is screened by the screening screen body 312 installed on the inner wall. The material with the qualified particle size is discharged. After the unloading is completed, the electric push rod 39 retracts and drives the inner cylinder body 34 to move upward. The first baffle 35 and the second baffle 36 reset and close, and the equipment re-enters the feeding and grinding cycle.

[0024] During the screening process, the impact force of the material on the mesh causes the slider body 314 to slide up and down along the movable channel 313 on the inner wall of the inner cylinder. The inner connecting rod 315, which is slidably connected to one end of the slider body 314, restricts the sliding trajectory. The return spring 316 sleeved on its outer wall continuously extends and retracts to store and release force when the slider slides, transforming linear sliding into high-frequency micro-amplitude vibration of the screening mesh body 312. This superposition of multiple vibrations can quickly shake off the dust attached to the mesh, effectively avoiding mesh blockage caused by dust hardening and maintaining stable screening efficiency.

[0025] Through the organic collaboration of various components, the entire process, from uniform raw material feeding, efficient grinding, automatic unloading, real-time screening to anti-clogging, is achieved. This completely eliminates the screw-fixed structure of the traditional unloading plate, ensuring the continuity of cement production and improving the particle size stability of the product through the linkage of grinding and screening. It solves the problem that the unloading plate needs to be fixed with multiple sets of screws to ensure its stability, which requires manual operation to clean the dust and hardened particles in the screw gaps every time it is disassembled or replaced. This results in excessively long maintenance time and seriously affects the continuous production of cement.

[0026] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A cement raw material mixing and grinding device, characterized by comprising: The utility model provides a ball mill, including support frame and the ball mill main body of installation in the support frame upper end, the outer wall of ball mill main body is provided with unloading assembly, the unloading assembly includes the unloading port of opening in the outer wall of ball mill main body and fixed installation in the outer wall outer plate of ball mill main body, the inner chamber of ball mill main body is communicated to the unloading port, the inner wall of unloading port is fixedly connected with outer cylinder main body, the inner wall of outer cylinder main body is slidably provided with inner cylinder main body, the inner wall of ball mill main body is connected with first baffle and second baffle, first baffle and second baffle are about the center symmetry distribution of unloading port, one side of first baffle is connected with first pull rod, one side of second baffle is connected with second pull rod, the inner wall of inner cylinder main body is connected with the one end of first pull rod away from first baffle, the inner wall of inner cylinder main body is connected with the one end of second pull rod away from second baffle, the outer wall of outer plate is installed electric push rod, the output end of electric push rod is fixedly connected with receiving plate, and the receiving plate is fixedly connected with inner cylinder main body.

2. A cement raw material mixing and grinding device according to claim 1, characterized in that: The first baffle and the second baffle are provided with a barrier plate on the side away from the first pull rod and the second pull rod, which is used to block the spherical grinding bodies of the ball mill main body.

3. A cement raw material mixing and grinding device according to claim 1, characterized in that: The inner wall of the inner cylinder main body is provided with a screening net main body for screening the cement raw material powder.

4. A cement raw material mixing and grinding device according to claim 3, characterized in that: The inner wall of the inner cylinder main body is provided with a movable channel, and the inner wall of the movable channel is slidably connected with a sliding block main body.

5. A cement raw material mixing and grinding device according to claim 4, characterized in that: One end of the sliding block main body is provided with a through hole, and the inner wall of the through hole is slidably connected with an inner connecting rod.

6. A cement raw material mixing and grinding device according to claim 1, characterized in that: One end of the ball mill main body is fixedly connected with a power main body, and the other end of the ball mill main body is provided with a feeding pipe. The inner wall of the feeding pipe is fixedly connected with a threaded guide plate.

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