Ball milling structure for cement preparation

Abstract

The utility model provides a ball-milling structure for cement preparation, which comprises a base and a rack, a ball-milling tank is arranged on the rack, the bottom of the rack positioned on one side of a discharge port of the ball-milling tank is hinged on the base, and a jacking device is arranged below the rack far away from one side of the discharge port of the ball-milling tank; the jacking device is arranged on the base and used for jacking the rack, so that the side, provided with the discharging opening, of the ball milling tank can incline downwards for discharging; the discharge port is in threaded connection with a threaded disc, and the threaded disc is provided with a plug extending into the discharge port and a screen located below the plug, so that discharged materials pass through the screen after the plug moves into the ball milling tank; according to the ball-milling structure for preparing the cement, disclosed by the utility model, the convenience degree of discharging of ball-milling equipment in the cement preparation process is improved, meanwhile, the ball-milling tank is simple in structure, and the sealing operation of the discharging opening in the ball-milling process is convenient.

Description

Technical Field

[0001] This utility model relates to the field of ball milling devices, and more specifically, to a ball milling structure for cement preparation. Background Technology

[0002] In the cement production process, components such as limestone raw materials, clay raw materials, and correction materials need to be ball-milled into powder. Traditional cement ball milling equipment is a horizontal structure with feeding at one or both ends of the ball mill tank and discharge port on the side wall of the tank. Through the rotation of the ball mill tank, the grinding balls inside the ball mill tank collide and rub against each other with the material, so that the material is finally powdered and discharged through the discharge port.

[0003] During the unloading process, since the material inside the ball mill jar is difficult to move laterally, it is usually necessary to add auger-type blades to the inner wall of the ball mill jar or to open as many unloading ports as possible along the axial direction on the side wall of the jar. The former results in greater wear and tear from the long-term collision between the blades and the material and grinding balls, while the latter increases the difficulty of sealing the numerous unloading ports during the ball milling process. Therefore, it is necessary to propose improvements to address the unloading problem of the ball mill device. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a ball mill structure that is suitable for cement preparation, has a simple internal tank structure, and is easy to unload.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A ball mill structure for cement preparation includes a base and a frame. A ball mill jar is mounted on the frame. The bottom of the frame, located on the discharge port side of the ball mill jar, is hinged to the base. A lifting device is located below the frame on the discharge port side away from the ball mill jar. The lifting device is mounted on the base and is used to lift the frame so that the side of the ball mill jar with the discharge port can tilt downwards to discharge material.

[0007] The discharge port is threadedly connected to a threaded disc, which has a plug extending into the discharge port and a screen located below the plug, so that the discharged material passes through the screen after the plug moves into the ball mill jar.

[0008] Furthermore, the discharge port is provided with a discharge pipe extending to the outside of the ball mill jar, and the threaded disc is threadedly connected to the discharge pipe;

[0009] The lower end of the threaded disc is connected to a set of chassis, and a set of main shafts extending into the unloading pipe are provided in the middle of the chassis. The plug and the screen are both located on the main shafts.

[0010] Furthermore, the threaded disc is threadedly connected to the outer wall of the discharge pipe, and the threaded disc is connected to the base plate by a number of connecting rods, with the axis of the connecting rods being parallel to the axis of the discharge pipe.

[0011] Furthermore, the threaded disc is threadedly connected to the outer wall of the unloading pipe, and a flexible guide pipe is connected to the lower end of the threaded disc, with the base located inside the guide pipe.

[0012] Furthermore, the gap between the plug and the screen is smaller than the diameter of the grinding balls inside the grinding jar.

[0013] Furthermore, in the axial direction of the ball mill jar, the ball mill jar has a fixed diameter section with a constant inner diameter and a variable diameter section with a gradually decreasing inner diameter, wherein the end of the variable diameter section with a larger inner diameter is connected to the fixed diameter section, and a portion of the discharge port is located on the variable diameter section and another portion is located on the fixed diameter section.

[0014] Furthermore, the end of the ball mill jar located on the same side as the discharge port is provided with an openable and closable feed port.

[0015] Furthermore, the lifting device is a hydraulic / pneumatic lifting device or an electric push rod.

[0016] Furthermore, the bottom of the frame has a set of downward-sloping wedge-shaped portions, and the lifting device includes a set of horizontal hydraulic cylinders. The output end of the hydraulic cylinders is provided with a wedge block that contacts the inclined surface of the wedge block, so that the wedge block is pushed horizontally by the hydraulic cylinders, thereby raising or lowering the side of the frame away from the discharge port.

[0017] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0018] In the ball mill structure for cement preparation of this utility model, since one side of the frame for installing the ball mill jar is hinged to the base and the other side is equipped with a lifting device, during unloading, one side of the ball mill jar can be lifted by the lifting device, causing the material inside the jar to gather towards the discharge port. The material is then discharged after being filtered through the screen by rotating the threaded disc, while larger material particles and grinding balls are blocked and retained inside the jar. This greatly improves the convenience of unloading the ball mill equipment during cement preparation. At the same time, the ball mill jar has a simple structure and the sealing operation of the discharge port during the ball milling process is convenient. Attached Figure Description

[0019] Figure 1 This is a formal drawing of the ball mill structure for cement preparation according to this utility model;

[0020] Figure 2 The sealing principle of the discharge port of the ball mill jar in this utility model Figure 1 ;

[0021] Figure 3 The sealing principle of the discharge port of the ball mill jar in this utility model Figure 2 ;

[0022] Figure 4 The sealing principle of the discharge port of the ball mill jar in this utility model Figure 3 ;

[0023] Icons: 1-Base, 2-Frame, 20-Shaft, 21-Leg, 22-Wedge, 3-Grinding jar, 30-Sizing section, 31-Diameter changing section, 32-Feed inlet, 4-Drive device, 5-Lifting device, 50-Hydraulic cylinder, 51-Wedge block, 6-Discharge port, 60-Discharge pipe, 61-Threaded disc, 62-Connecting rod, 63-Chassis, 64-Main shaft, 65-Screen, 66-Plug, 67-Guide pipe. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Reference Figure 1 This utility model discloses a ball mill structure for cement preparation, including a base 1 and a frame 2. A ball mill jar 3 is provided on the frame 2. The ball mill jar 3 has a horizontal structure, and both ends of its horizontal direction are rotatably connected to the frame 2. A drive device 4 is also provided on the frame 2 to drive the rotation of the ball mill jar 3.

[0026] It is easy to understand that, depending on the power requirements, the drive unit 4 can be an electric drive unit or a fuel drive unit, and the drive unit 4 and the ball mill jar 3 can be driven by gears or by pulleys.

[0027] Reference Figure 1 The ball mill jar 3 has a discharge port 6 on its side wall. The bottom of the frame 2 on the side closest to the discharge port 6 of the ball mill jar 3 is hinged to the base 1, and the frame 2 on the side away from the discharge port 6 of the ball mill jar 3 has a lifting device 5. The lifting device 5 is located on the base 1 and is used to lift the frame 2. That is, during unloading, the lifting device 5 lifts the frame 2. Figure 1 The left side of the frame 2 shown is tilted so that the ball mill jar 3 is tilted and the side with the discharge port 6 is tilted downward, so that the material in the jar moves toward the discharge port 6 and is discharged.

[0028] The ball mill jar 3 has an openable and closable feed inlet 32 ​​on one side of the discharge port 6.

[0029] For the lifting device 5, it is easy to imagine that the lifting device 5 can be a hydraulic / pneumatic lifting device 5 or an electric push rod. The lower end of the lifting device 5 can be fixed on the base 1 and the upper end can abut against the bottom of the frame 2. Alternatively, one end of the lifting device 5 can be hinged to the base 1 and the other end can be hinged to the frame 2.

[0030] In this embodiment, refer to Figure 1 The right side of the frame 2 is hinged to the base 1 below via a pivot 20. The lower left side of the frame 2 is provided with a support leg 21. When the lifting device 5 is not lifting, the frame 2 can be horizontally supported on the base 1 by the support leg 21 and the hinge structure on the right side. The bottom left side of the frame 2 has a set of wedge-shaped parts 22 with inclined surfaces facing downward to the right. The lifting device 5 includes a set of hydraulic cylinders 50 horizontally arranged on the base 1. The output end of the hydraulic cylinders 50 is provided with a wedge block 51 that contacts the inclined surface of the wedge-shaped parts 22. The wedge block 51 can slide horizontally left and right under the drive of the hydraulic cylinders 50. Therefore, the left side of the frame 2 can be raised or lowered within a certain range by pushing and squeezing the wedge-shaped parts 22 by the wedge block 51.

[0031] The lifting angle of the left side of the frame 2 driven by the wedge block 51 must ensure that the material can move to the right along the inside of the ball mill jar 3 while also ensuring the structural safety of the entire frame 2. Therefore, during the design process, the maximum lifting angle is limited to less than 30°.

[0032] Reference Figure 2 and Figure 3 The discharge port 6 is provided with a discharge pipe 60 extending to the outside of the ball mill jar 3. A threaded disc 61 is threadedly connected to the discharge pipe 60. Therefore, the threaded disc 61 can move within a certain range along the axial direction of the discharge pipe 60. The threaded disc 61 has a plug 66 extending into the discharge port 6 and a screen 65 located below the plug 66. During the ball milling process, the plug 60 blocks the discharge port 6. When discharging, the threaded disc 61 is screwed to move the plug 66 into the ball mill jar 3. At this time, the material can enter the discharge port 6. The screen below the plug 66 screens and discharges the material.

[0033] It is easy to understand that the threaded disc 61 can be threaded to the inner wall of the discharge pipe 60 or to the outer wall of the discharge pipe 60. Considering that material dust in the discharge pipe 60 is more likely to clog the threaded surface and interfere with the turning of the threaded disc 61, in this embodiment, the threaded disc 61 is threaded to the outer thread of the discharge pipe 60.

[0034] In addition, refer to Figure 2 and Figure 3In one embodiment, the lower end of the threaded disc 61 is connected to a set of base plates 63, that is, the threaded disc 61 and the base plates 63 are connected by several connecting rods 62, and the axis of the connecting rods 62 is parallel to the axis of the discharge pipe 60. The base plate 63 is a frame structure, and a set of main shafts 64 extending into the discharge pipe 60 are provided in the middle of the base plate 63. The plug 66 and the screen 65 are both provided on the main shafts 64. With the above arrangement, the threaded disc 61 can be easily screwed to make the plug 66 slide in or out of the discharge port 6.

[0035] In order to prevent the grinding balls in the ball mill jar 3 from being discharged through the discharge port 6, the gap between the plug 66 and the screen 65 is set to be smaller than the diameter of the grinding balls in the ball mill jar 3. That is, after the plug 66 moves into the inside of the jar, the grinding balls cannot enter the discharge pipe 60.

[0036] Reference Figure 4 In one embodiment, the lower end of the threaded disc 61 can be connected to a flexible guide tube 67. Therefore, the chassis 63 and connecting rod 62 are all contained within the guide tube 67, and dust is not easily diffused into the surrounding environment during unloading.

[0037] In addition, to better achieve unloading of the ball mill jar 3, in one embodiment, the ball mill jar 3 has a fixed diameter section 30 with a constant inner diameter and a variable diameter section 31 with a gradually shrinking inner diameter in the axial direction. The end of the variable diameter section 31 with a larger inner diameter is the same as and connected to the inner diameter of the fixed diameter section 30. Part of the unloading port 6 is located on the variable diameter section 31 and the other part is located on the fixed diameter section 30. During unloading, the left side of the ball mill jar 3 is raised. Therefore, the left and right sides of the unloading port 6 form a "V" shaped surface, and the cutting port 6 is located at the bottom of the V-shaped surface, which is conducive to the accumulation and discharge of materials.

[0038] The working process of the ball mill structure for cement preparation of this utility model is as follows:

[0039] First, material is added into the ball mill jar 3 through the feed inlet 32. The ball mill jar 3 is driven to rotate and ball mill through the drive device 4. After the ball milling is completed, the lifting device 5 drives the left side of the frame 1 to lift upward. The material in the ball mill jar 3 slides to the right side of the jar body to the discharge port 6. At this time, it is only necessary to screw the threaded disc 61 so that the plug 66 enters the ball mill jar 3 from the discharge pipe 60. The material is discharged after being screened by the screen 65.

[0040] To address the issue of insufficient material discharge from the ball mill jar 3, the outer wall of the jar can be tapped / vibrated. Alternatively, during the unloading process, the ball mill jar 3 can be driven by the motor in the drive device 4 to rotate / oscillate back and forth within a certain angle, thus ensuring complete material discharge.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ball mill structure for cement preparation, comprising a base and a frame, wherein a ball mill jar is disposed on the frame, characterized in that, The bottom of the frame located on the discharge port side of the ball mill jar is hinged to the base, and a lifting device is provided below the frame on the discharge port side away from the ball mill jar; the lifting device is provided on the base to lift the frame so that the side of the ball mill jar with the discharge port can tilt downward for unloading. The discharge port is threadedly connected to a threaded disc, which has a plug extending into the discharge port and a screen located below the plug, so that the discharged material passes through the screen after the plug moves into the ball mill jar.

2. The ball mill structure for cement preparation according to claim 1, characterized in that, The discharge port is provided with a discharge pipe extending to the outside of the ball mill jar, and the threaded disc is threadedly connected to the discharge pipe; The lower end of the threaded disc is connected to a set of chassis, and a set of main shafts extending into the unloading pipe are provided in the middle of the chassis. The plug and the screen are both located on the main shafts.

3. The ball mill structure for cement preparation according to claim 2, characterized in that, The threaded disc is threaded onto the outer wall of the discharge pipe, and the threaded disc is connected to the base plate by a number of connecting rods, with the axis of the connecting rods being parallel to the axis of the discharge pipe.

4. The ball mill structure for cement preparation according to claim 2 or 3, characterized in that, The lower end of the threaded disc is connected to a flexible guide tube, and the chassis is located inside the guide tube.

5. The ball mill structure for cement preparation according to claim 1, 2, or 3, characterized in that, The gap between the plug and the screen is smaller than the diameter of the grinding balls inside the grinding jar.

6. The ball mill structure for cement preparation according to claim 1, 2, or 3, characterized in that, Along the axial direction of the ball mill jar, the ball mill jar has a fixed diameter section with a constant inner diameter and a variable diameter section with a gradually decreasing inner diameter, wherein the end of the variable diameter section with a larger inner diameter is connected to the fixed diameter section, and a portion of the discharge port is located on the variable diameter section and another portion is located on the fixed diameter section.

7. The ball mill structure for cement preparation according to claim 6, characterized in that, The end of the ball mill jar, located on the same side as the discharge port, is provided with an openable and closable feed port.

8. The ball mill structure for cement preparation according to claim 1, characterized in that, The lifting device is a hydraulic / pneumatic lifting device or an electric push rod.

9. The ball mill structure for cement preparation according to claim 8, characterized in that, The bottom of the frame has a set of inclined downward wedge-shaped portions. The lifting device includes a set of horizontal hydraulic cylinders. The output end of the hydraulic cylinders is provided with a wedge block that contacts the inclined surface of the wedge-shaped portions. The wedge block is pushed horizontally by the hydraulic cylinders to raise or lower the side of the frame away from the discharge port.

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