Pneumatic conveying type grading mill feeding structure

Abstract

The utility model discloses an air-assisted feeding structure of a grading mill, and belongs to the technical field of grading mills. A pneumatic conveying type grading mill feeding structure comprises a grading mill body and further comprises a stock bin fixedly arranged on the outer wall of the grading mill body, a storage bin is formed in the stock bin, a discharging pipe is fixedly arranged at the bottom of the storage bin, and a material grinding roller used for grinding materials is rotationally arranged in the discharging pipe; the spiral conveying pipe is fixedly arranged on the grading mill main body; when the spiral conveying pipe is started to convey materials into the grading mill body, the materials in the storage bin flow into the spiral conveying pipe through the discharging pipe, the grinding roller is driven to rotate, and under extrusion of the outer wall of the grinding roller and the inner wall of the discharging pipe, a certain grinding effect can be achieved on discharged large-particle materials; therefore, the particle size of the material can be reduced, the crushing time of the material in the grading mill main body is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of classifying mill technology, and in particular to a pneumatically fed classifying mill feeding structure. Background Technology

[0002] The pneumatic classifier is a high-efficiency device that combines pneumatic conveying and material crushing and classification functions. It is widely used in mineral processing, chemical, pharmaceutical, food and other industries. It uses compressed air or gas as a power source to transport materials from one place to another, and achieves preliminary classification and dispersion during the conveying process. Finally, the materials enter the crushing chamber for fine crushing. The pneumatic classifier generally includes a classifier, a hopper, an air classifier and a filter. In use, the feeding mechanism in the hopper transports the material to the classifier for crushing.

[0003] The existing feeding mechanism is inconvenient to pre-crush the material during the feeding process, which increases the working time of the classifier mill, resulting in lower crushing efficiency and affecting production efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that it is inconvenient to pre-crush materials during the feeding process, which affects the efficiency of the classifying mill, and proposes a pneumatic feeding structure for the classifying mill.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic feeding structure for a classifying mill includes a classifying mill body and further includes: a hopper fixedly disposed on the outer wall of the classifying mill body, the hopper having a storage compartment inside, a discharge pipe fixedly disposed at the bottom of the storage compartment, and an abrasive roller for grinding materials rotatably disposed inside the discharge pipe; and a spiral conveying pipe fixedly disposed on the classifying mill body, the output end of the spiral conveying pipe being connected to the inside of the classifying mill body, and the input end of the spiral conveying pipe being connected to the output end of the hopper.

[0007] To improve the polishing effect, preferably, the abrasive roller includes a guide rod with a frustum-shaped structure of a rotating body and a polishing rod with a cylindrical structure. The top of the polishing rod is fixedly connected to the bottom of the guide rod. The polishing rod is rotatably disposed in the discharge pipe, and multiple sets of evenly distributed protrusions are fixedly disposed on the outer wall of the polishing rod. The top of the guide rod extends into the storage compartment.

[0008] In order to have a squeezing effect on the material entering the discharge pipe, the outer wall of the guide rod is further provided with helical teeth.

[0009] In order to agitate the materials in the storage bin and drive the abrasive roller to rotate, a rotating shaft is further provided inside the storage bin. The rotating shaft is fixedly connected to the top of the guide rod. Multiple sets of agitating rods are fixedly installed on the rotating shaft. A top cover is detachably installed on the top of the bin, and a motor for driving the rotating shaft to rotate is fixedly installed on the top cover. A feed pipe is fixedly installed on the top cover.

[0010] Furthermore, a screening chamber is provided inside the hopper, and the output end of the discharge pipe is connected to the screening chamber. A feed pipe is fixedly installed at the bottom of the screening chamber and is connected to the input end of the spiral conveyor pipe. A screen frame is slidably installed inside the screening chamber, and a screen mesh is fixedly installed on the screen frame. The screen mesh is located below the outlet of the discharge pipe.

[0011] Furthermore, the side wall of the hopper is provided with a window, the screen frame is slidably disposed in the window, a rotating rod is fixedly disposed at the bottom of the grinding rod, a connecting plate is fixedly disposed on the screen frame, an eccentric hole is provided on the top end face of the connecting plate, a rotating plate is fixedly disposed at one end of the rotating rod extending into the eccentric hole, the end of the rotating plate away from the rotating rod abuts against the inner wall of the eccentric hole, and a guide rod is fixedly disposed in the screening chamber, the screen frame is slidably connected to the guide rod, a spring is sleeved on the guide rod, and the two ends of the spring abut against the screen frame and the inner wall of the screening chamber, respectively.

[0012] Compared with the prior art, this utility model provides a pneumatic feeding structure for a classifying mill, which has the following advantages:

[0013] 1. The pneumatic feeding structure of this classifier mill, when the spiral conveyor pipe is activated to transport materials into the main body of the classifier mill, the materials in the storage bin flow into the spiral conveyor pipe through the discharge pipe. During this process, the grinding roller is driven to rotate, and under the pressure of the outer wall of the grinding roller and the inner wall of the discharge pipe, the larger particles of the discharged material can be ground to a certain extent, thereby reducing the particle size of the material, helping to reduce the crushing time of the material in the main body of the classifier mill, and improving production efficiency;

[0014] 2. The pneumatic feeding structure of this classifier mill has a screening chamber inside the hopper, and a screen frame with a screen mesh is slidably installed inside the screening chamber. This allows for screening of the ground material, intercepting larger particles on the screen mesh, reducing the amount of larger particles entering the main body of the classifier mill, and improving the performance.

[0015] The parts of this device not described herein are the same as or can be implemented using existing technologies. When the spiral conveyor pipe is activated to transport materials into the classifying mill body, the materials in the storage bin flow into the spiral conveyor pipe through the discharge pipe. During this process, the grinding roller is driven to rotate, and under the pressure of the outer wall of the grinding roller and the inner wall of the discharge pipe, the larger particles of the discharged material can be ground to a certain extent, thereby reducing the particle size of the material, helping to reduce the crushing time of the material in the classifying mill body, and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a pneumatically fed graded mill feeding structure proposed in this utility model;

[0017] Figure 2 This is a cross-sectional view of a pneumatically fed hopper for a graded mill, as proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the abrasive roller of a pneumatically fed graded mill proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the eccentric hole structure of a pneumatic graded mill feeding structure proposed in this utility model.

[0020] In the diagram: 1. Classifying mill body; 2. Material bin; 201. Storage bin; 202. Discharge pipe; 203. Screening bin; 204. Feed pipe; 205. Top cover; 3. Rotating shaft; 301. Stirring rod; 302. Grinding rod; 303. Guide rod; 304. Spiral teeth; 305. Rotating rod; 306. Rotating plate; 4. Screen frame; 401. Screen mesh; 402. Connecting plate; 403. Eccentric hole; 5. Guide rod; 501. Spring; 6. Spiral conveying pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example:

[0024] Reference Figures 1-4 A pneumatically fed classifier mill structure includes a classifier mill body 1, and further includes: a hopper 2 fixedly mounted on the outer wall of the classifier mill body 1; a support plate fixedly mounted on the outer wall of the classifier mill body 1; the hopper 2 fixedly mounted on the support plate; a storage compartment 201 opened inside the hopper 2; a discharge pipe 202 fixedly mounted at the bottom of the storage compartment 201; and an abrasive roller for grinding materials rotatably mounted inside the discharge pipe 202. A spiral conveyor pipe 6 is fixedly mounted on the classifier mill body 1, and the output end of the spiral conveyor pipe 6 is connected to the inside of the classifier mill body 1. The input end of the spiral conveyor pipe 6 is connected to the output end of the hopper 2. When the spiral conveyor pipe 6 is started to convey material into the classifying mill body 1, the material in the storage bin 201 flows into the spiral conveyor pipe 6 through the discharge pipe 202. During this process, the grinding roller is driven to rotate. Under the pressure of the outer wall of the grinding roller and the inner wall of the discharge pipe 202, the material with larger particles can be ground to a certain extent, thereby reducing the particle size of the material, helping to reduce the crushing time of the material in the classifying mill body 1, and improving production efficiency.

[0025] Reference Figure 3 Here, we design the abrasive roller as a guide rod 303 with a frustum-shaped structure of revolution, and a grinding rod 302 with a cylindrical structure. The top of the grinding rod 302 is fixedly connected to the bottom of the guide rod 303. The diameter of the large end of the guide rod 303 is equal to the diameter of the grinding rod 302. The grinding rod 302 is rotatably mounted inside the discharge pipe 202, and multiple sets of evenly distributed protrusions are fixedly mounted on the outer wall of the grinding rod 302. The top of the guide rod 303 extends into the storage chamber 201. Helical teeth 304 are fixedly mounted on the outer wall of the guide rod 303. During rotation, the storage chamber 201 can be... The material in section 01 is conveyed into the discharge pipe 202. The material entering the discharge pipe 202 is subjected to a certain downward squeezing force, which facilitates the grinding rod 302 to grind the material and reduces the up-and-down swinging of larger particles, thereby improving the grinding effect. During use, the grinding roller is composed of a guide rod 303 and a grinding rod 302. A spiral tooth 304 is fixedly installed on the guide rod 303, and a protrusion is fixedly installed on the grinding rod 302. During the rotation of the grinding roller, the spiral tooth 304 exerts a certain downward squeezing force on the material entering the discharge pipe 202, which facilitates the grinding rod 302 to grind the material and improves the use effect.

[0026] Reference Figure 2 and Figure 3A rotating shaft 3 is rotatably installed inside the storage bin 201. The rotating shaft 3 is fixedly connected to the top of the guide rod 303. Multiple sets of stirring rods 301 are fixedly installed on the rotating shaft 3. There are three sets of stirring rods 301, with two stirring rods in each set. A top cover 205 is detachably installed on the top of the bin 2. The top cover 205 can be removed from the top of the bin 2 using bolts or buckles. Here, we prefer bolts because they are easy to install and remove, reliable, and convenient for subsequent maintenance. A motor for driving the rotating shaft 3 is fixedly installed on the top cover 205. A feed pipe is fixedly installed on the top cover 205 to facilitate the addition of materials into the storage bin 201. In use, the rotating shaft 3 is driven by the motor to rotate, which can stir the stirring rods 301 in the storage bin 201. On the one hand, it can make the materials in the storage bin 201 evenly mixed. On the other hand, the stirring helps the materials flow to the discharge pipe 202. Moreover, the rotating shaft 3 is fixedly connected to the grinding roller, which can simultaneously drive the grinding roller for grinding, improving the use effect.

[0027] Reference Figure 2 and Figure 3 A screening chamber 203 is provided inside the hopper 2, located directly below the storage hopper 201. The output end of the discharge pipe 202 is connected to the screening chamber 203. A feed pipe 204 is fixedly installed at the bottom of the screening chamber 203, and is connected to the input end of the spiral conveyor pipe 6. A screen frame 4 is slidably installed inside the screening chamber 203, and a screen mesh 401 is fixedly installed on the screen frame 4. The screen mesh 401 is located below the outlet of the discharge pipe 202. In use, by providing a screening chamber 203 inside the hopper 2 and a screen frame 4 with a screen mesh 401 slidably installed inside the screening chamber 203, the ground material can be screened, and larger particles are intercepted on the screen mesh 401, reducing the amount of larger particles entering the main body of the classifying mill 1 and improving the usage effect.

[0028] Reference Figures 1-4A window is provided on the side wall of the hopper 2, and the screen frame 4 is slidably installed in the window. This ensures reliable sliding of the screen frame 4 and facilitates the discharge of larger particles. A rotating rod 305 is fixedly installed at the bottom of the grinding rod 302, and a connecting plate 402 is fixedly installed on the screen frame 4. An eccentric hole 403 is provided on the top end face of the connecting plate 402. A rotating plate 306 is fixedly installed at the end of the rotating rod 305 that extends into the eccentric hole 403, and the end of the rotating plate 306 away from the rotating rod 305 abuts against the inner wall of the eccentric hole 403. Furthermore, a guide rod 5 is fixedly installed inside the screening chamber 203, which slidably connects the screen frame 4 to the guide rod 5. A spring 501 is sleeved on the guide rod 5, with both ends of the spring 501 abutting against the screen frame 4 and the inner wall of the screening chamber 203, respectively. During use, when the grinding rod 302 rotates to grind the material, it can drive the rotating plate 306 to rotate within the eccentric hole 403 via the rotating rod 305. Under the elastic force of the spring 501, the screen frame 4, along with the screen mesh 401, can slide back and forth along the axis of the guide rod 5, facilitating material screening and improving the efficiency. Alternatively, a cylinder or an electric telescopic cylinder can be used to drive the screen frame 4 to slide back and forth for screening.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pneumatically fed classifier mill feeding structure, comprising a classifier mill body (1), characterized in that, Also includes: A hopper (2) is fixedly installed on the outer wall of the classifier body (1). A storage chamber (201) is opened in the hopper (2). A discharge pipe (202) is fixedly installed at the bottom of the storage chamber (201). An abrasive roller for grinding is rotatably installed in the discharge pipe (202). A spiral conveyor pipe (6) is fixedly installed on the main body (1) of the classifying mill. The output end of the spiral conveyor pipe (6) is connected to the inside of the main body (1) of the classifying mill, and the input end of the spiral conveyor pipe (6) is connected to the output end of the hopper (2).

2. A pneumatically conveyed, staged grinding feed structure according to claim 1, characterized in that The abrasive roller includes a guide rod (303) with a frustum-shaped structure of a rotating body and a grinding rod (302) with a cylindrical structure. The top of the grinding rod (302) is fixedly connected to the bottom of the guide rod (303). The grinding rod (302) is rotatably disposed in the discharge pipe (202), and multiple sets of evenly distributed protrusions are fixedly disposed on the outer wall of the grinding rod (302). The top of the guide rod (303) extends into the storage bin (201).

3. A pneumatically conveyed classification mill feed arrangement according to claim 2, characterized in that The outer wall of the guide rod (303) is fixedly provided with helical teeth (304).

4. A pneumatic classification mill feed structure according to claim 3, wherein, The storage bin (201) is rotatably equipped with a rotating shaft (3), which is fixedly connected to the top of the guide rod (303). Multiple sets of stirring rods (301) are fixedly installed on the rotating shaft (3). The top of the hopper (2) is detachably equipped with a top cover (205), and a motor for driving the rotating shaft (3) to rotate is fixedly installed on the top cover (205). A feed pipe is fixedly installed on the top cover (205).

5. A pneumatic classification mill feed structure according to claim 4, wherein, The hopper (2) is provided with a screening chamber (203). The output end of the discharge pipe (202) is connected to the screening chamber (203). The bottom of the screening chamber (203) is fixedly provided with a discharge pipe (204). The discharge pipe (204) is connected to the input end of the spiral conveyor pipe (6). A screen frame (4) is slidably provided in the screening chamber (203). A screen mesh (401) is fixedly provided on the screen frame (4). The screen mesh (401) is located below the outlet of the discharge pipe (202).

6. A pneumatic classification mill feed structure according to claim 5, wherein, The hopper (2) has a window on its side wall. The screen frame (4) is slidably disposed in the window. A rotating rod (305) is fixedly disposed at the bottom of the grinding rod (302). A connecting plate (402) is fixedly disposed on the screen frame (4). An eccentric hole (403) is opened on the top end face of the connecting plate (402). A rotating plate (306) is fixedly disposed at one end of the rotating rod (305) that extends into the eccentric hole (403). The end of the rotating plate (306) away from the rotating rod (305) abuts against the inner wall of the eccentric hole (403). A guide rod (5) is fixedly disposed in the screening chamber (203). The screen frame (4) is slidably connected to the guide rod (5). A spring (501) is sleeved on the guide rod (5). The two ends of the spring (501) abut against the inner walls of the screen frame (4) and the screening chamber (203) respectively.

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