A low-resistance classifier housing structure for a pendulum mill

Abstract

This utility model belongs to the technical field of pendulum mills, and particularly relates to a low-resistance classifier housing structure for pendulum mills. The low-resistance classifier housing structure for pendulum mills includes an upper cone and a lower cone, with an annular connecting body with an arc-shaped cross-section between the upper and lower cones. The upper cone, lower cone, and connecting body are all hollow structures. The upper end face of the connecting body is fixedly connected to the lower end face of the upper cone, and its lower end face is fixedly connected to the upper end face of the lower cone. The inner surface of the connection between the connecting body and the upper cone is aligned with the inner surface of the upper cone, and the inner surface of the connection between the connecting body and the lower cone is aligned with the inner surface of the lower cone. This utility model can reduce the operating resistance of the pendulum mill system and improve airflow stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of pendulum mills, and particularly relates to a low-resistance classifier shell structure for pendulum mills. Background Technology

[0002] As a traditional powder processing equipment, the pendulum mill is widely used in industries such as metallurgy, building materials, chemicals, mining, highway construction, and water conservancy and hydropower to crush and grind mineral materials.

[0003] As an important powder screening and grading device in a pendulum mill system, the air classifier mainly relies on the forced vortex formed by the high-speed rotation of the rotor to classify powders. Within the grading zone formed by the lower shell and the rotor, under the action of the forced vortex, powders that meet the fineness requirements are collected by the collector as finished products through the rotor, while powders that do not meet the fineness requirements fall back into the main grinding chamber along the wall of the classifier shell for regrinding.

[0004] The existing pendulum mill classifier shells mainly have the following two structural forms: one is... Figure 1 (a) The classifier housing 1 is formed by fixing a section of conical cylinder 11 (powder diffusion zone) and a section of cylindrical cylinder 12 (powder classification zone) together. Another type is... Figure 1 (b) The classifier housing 1 is formed by interlocking the upper conical shell 13 (powder classification zone) and the lower conical shell 14 (powder diffusion zone).

[0005] In both of these structures, the rate of change of cross-sectional area between the powder diffusion zone and the powder classification zone of the classifier shell is discontinuous during use. As a result, the airflow velocity and pressure change suddenly from the powder diffusion zone to the powder classification zone during operation, which can easily generate turbulence, increase the system operating resistance and airflow instability, thereby reducing the classifier's powder selection efficiency and increasing the system's energy consumption. Utility Model Content

[0006] To address the technical problems existing in the prior art, this application provides a low-resistance classifier housing structure for a pendulum mill that can reduce the operating resistance of the pendulum mill system and improve airflow stability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A low-resistance classifier housing structure for a pendulum mill includes an upper cone and a lower cone. An annular connector with an arc-shaped cross-section is provided between the upper and lower cones. The upper cone, lower cone, and connector are all hollow. The upper end face of the connector is fixedly connected to the lower end face of the upper cone, and its lower end face is fixedly connected to the upper end face of the lower cone. The inner surface of the connector at the connection with the upper cone is aligned with the inner surface of the upper cone, and the inner surface of the connector at the connection with the lower cone is aligned with the inner surface of the lower cone.

[0008] Preferably, multiple sets of connecting ears are fixedly connected to the outer surface of the connecting body, and each set of connecting ears is provided with a connecting ear through hole I.

[0009] Preferably, each set of connecting ears has two oppositely arranged, and a pin is detachably inserted into the through hole I of each set of connecting ears.

[0010] Preferably, a positioning block I is rotatably sleeved on the pin between each set of connecting ears. A through hole of positioning block I is opened on the positioning block I parallel to the axis of the pin. A through hole II of connecting ears is opened on the circumference with the axis of the through hole I of connecting ears as the center. When the positioning block I rotates to abut against the outer surface of the lower cone and the positioning pin is inserted into the through hole II of connecting ears and the through hole of positioning block I, the connecting body is coaxially arranged with the lower cone. The positioning pin can be detached from the through hole II of connecting ears and the positioning block I.

[0011] Preferably, the positioning block I includes a rotating part I rotatably sleeved on the positioning pin and a positioning part I fixedly connected to one end of the rotating part I away from the positioning pin. The positioning part I is bent relative to the rotating part I, and the inner side of the positioning part I can abut against the outer side of the lower cone.

[0012] Preferably, a positioning block II is rotatably sleeved on the pin between each set of connecting ears. A positioning block II through hole is opened on the positioning block II parallel to the pin axis. A connecting ear through hole III is opened on the circumference with the axis of the connecting ear through hole I as the center. When the positioning block II rotates to abut against the upper cone and the positioning pin is inserted into the connecting ear through hole III and the positioning block II through hole, the connecting body is coaxially arranged with the upper cone, and the positioning pin can be disassembled from the connecting ear through hole III and the positioning block II through hole.

[0013] Preferably, the positioning block II includes a rotating part II rotatably sleeved on the positioning pin and a positioning part II fixedly connected to one end of the rotating part II away from the positioning pin. The positioning part II is bent relative to the rotating part II, and the inner side of the positioning part II can abut against the outer side of the upper cone.

[0014] Preferably, a lower flange is fixedly connected to the lower end face of the lower cone, and an upper flange is fixedly connected to the upper end face of the upper cone.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes an arc-shaped connecting body between the lower and upper cones to create a continuous cross-sectional area change rate from the powder diffusion zone to the powder classification zone. This continuous change in flow velocity and pressure effectively reduces turbulence, system operating resistance, and energy consumption. Furthermore, the continuous and stable change in airflow velocity effectively minimizes the impact of airflow variations on the powder classification zone, thereby improving the classification accuracy of the air classifier.

[0016] In addition, by setting connecting ears, it is easy to hoist the connecting body and even the air classifier housing, and it is also easy to position the connecting body and the upper cone during welding. The structure is simple and easy to operate. Attached Figure Description

[0017] Figure 1 The diagram shows the structural schematics of two existing air classifier housings.

[0018] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of this utility model installed on a pendulum mill.

[0020] Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0021] Figure 5 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0022] Figure 6 for Figure 5 An enlarged structural diagram of point A.

[0023] Figure 7 This is a three-dimensional structural diagram of the connector when positioning it according to Embodiment 4 of this utility model.

[0024] Figure 8 for Figure 7 An enlarged structural diagram at point B.

[0025] Figure 9 This is a front view structural diagram of the connector when positioning it according to Embodiment 4 of this utility model.

[0026] Figure 10 This is a front view structural diagram of the upper cone during positioning in Embodiment 4 of this utility model.

[0027] Figure 11 for Figure 10 An enlarged structural diagram at point C.

[0028] Figure 12 This is a schematic diagram of the positioning block I in Embodiment 4 of this utility model.

[0029] Figure 13 This is a schematic diagram of the positioning block II in Embodiment 4 of this utility model.

[0030] In the diagram: 1. Air classifier housing; 11. Conical cylinder; 12. Cylindrical cylinder; 13. Upper conical shell; 14. Lower conical shell. 15. Upper cone; 151. Upper flange. 16. Lower cone, 161. Lower flange, 17. Connector 18. Connecting ear; 181. Connecting ear through hole I; 182. Pin; 183. Pin cap; 184. Connecting ear through hole II; 185. Connecting ear through hole III. 19. Positioning block 191. Positioning block I; 1911. Through hole of positioning block I; 1912. Rotating part I; 1913. Positioning part I; 1914. Through hole of rotating part I. 192. Locating block II; 1921. Through hole of locating block II; 1922. Rotating part II; 1923. Locating part II; 1924. Through hole of rotating part II. 193. Positioning pin, 2. Air classifier rotor; 3. Transmission components; 4. Air classifier top cover; 5. Motor; 6. Motor pulley; 7. Belt; 8. Large pulley. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] 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. Example 1

[0033] See appendix Figure 2 , 3 As shown, a low-resistance classifier housing structure for a pendulum mill includes an upper cone 15 disposed above and a lower cone 16 disposed below. An annular connecting body 17 with an arc-shaped cross-section is disposed between the upper cone 15 and the lower cone 16. The upper cone 16, the lower cone 16 and the connecting body 17 are all hollow structures. The upper end face of the connecting body 17 is welded to the lower end face of the upper cone 15 and its lower end face is welded to the upper end face of the lower cone 16.

[0034] The inner surface of the connection between the connecting body 17 and the upper cone 15 is aligned with the inner surface of the upper cone 15, and the inner surface of the connection between the connecting body 17 and the lower cone 16 is aligned with the inner surface of the lower cone 16. Preferably, the upper cone 15, the lower cone 16, and the connecting body 17 are coaxially arranged. In this embodiment, the inner diameter of the upper end of the upper cone 15 is smaller than its inner diameter of the lower end, and the inner diameter of the upper end of the lower cone 16 is larger than its inner diameter of the lower end. In addition, a lower flange 161 is welded to the lower end face of the lower cone 16, and the lower flange 161 is coaxially arranged with the lower cone 16. The lower flange 161 is provided to facilitate the detachable installation of the classifier housing 1 on the upper end of the pendulum mill cylinder. An upper flange 151 is welded to the upper end face of the upper cone 15, and the upper flange 151 is coaxially arranged with the upper cone 15. The upper flange 151 is provided to facilitate the detachable installation of the classifier on the classifier housing 1.

[0035] The working principle and process of this embodiment are as follows: As described above, the lower cone 16 and the upper cone 15 are welded together via the connector 17. Then, the classifier housing 1 of this embodiment is installed on the corresponding component of an existing pendulum mill, such as... Figure 3 The classifier consists of a rotor 2, a transmission component 3, a top cover 4, a motor 5, a motor pulley 6, a belt 7, and a large pulley 8. The top cover 4 is fixed to the upper flange 151. During actual operation of the pendulum mill, the output shaft of the motor 5 drives the motor pulley 6, belt 7, and large pulley 8 to rotate, which in turn drives the transmission component 3 and the classifier rotor 2 to rotate. The rotating classifier rotor 2 then classifies the powder inside the classifier housing 1.

[0036] During operation of the pendulum mill, the material ground by the pendulum mill is carried by the air into the material diffusion zone A1 of the classifier housing 1 (e.g., ...). Figure 3 Below the dotted line (as indicated), in this area, due to the larger inner diameter of the lower cone 16 at the top and smaller at the bottom, the airflow area suddenly increases, and the material is dispersed, preparing for the next stage of classification. As the airflow rises, the material is further carried into the powder classification zone A2 (e.g., Figure 3Above the dotted line (as indicated), the high-speed rotation of the classifier rotor 2 forces the airflow in the powder classification zone A2 to rotate. Powder meeting the size requirements passes through the blades of the classifier rotor 2, while powder not meeting the size requirements is thrown to the upper cone 15 of the classifier housing 1 by centrifugal force, loses kinetic energy, and falls back into the mill for re-grinding. Because an arc-shaped connecting body 17 is provided between the lower cone 16 and the upper cone 15, the rate of change of cross-sectional area from the powder diffusion zone A1 to the powder classification zone A2 is continuous. The flow velocity and pressure changes at this point are also continuous, effectively reducing turbulence, system operating resistance, and system energy consumption. Simultaneously, the continuous and stable change in airflow velocity effectively reduces the impact of airflow variations on the powder classification zone, improving the classification accuracy of the classifier. Example 2

[0037] See appendix Figure 4 As shown, this embodiment is a further improvement on embodiment 1. Because the cross-section of the connector 17 is arc-shaped and its diameter is relatively large, the connector 17 is difficult to lift when aligning, butt-joining, and welding with the lower cone 16. Therefore, in this embodiment, multiple sets of connecting ears 18 are welded to the outer surface of the connector 17, and each set of connecting ears 18 has a connecting ear through hole I181. To avoid the connecting ears 18 obstructing the welding process when performing circumferential welding on the connector 17, lower cone 16, and upper cone 15, the connecting ears 18 are positioned between the upper and lower end faces of the connector 17, meaning the connecting ears 18 cannot extend to the upper or lower sides of the connector 17. Thus, the connector 17 can be lifted by hooking it into the connecting ear through hole I.

[0038] The working principle and process of this embodiment are as follows: After positioning and fixing the lower cone 16, the lifting hook of the lifting equipment is hooked into the connecting lug hole I to lift the connecting body 17. Then, the connecting body 17 is lifted above the lower cone 16 and aligned with the lower cone 16. Spot welding is then performed. Afterward, circumferential welding can be performed on the connecting body 17 and the lower cone 16, or only spot welding can be performed. After aligning the upper cone 15 with the connecting body 17, circumferential welding is performed uniformly. Since the upper flange 151 is welded on the upper cone 15, the upper cone 15 can be lifted and aligned with the connecting body 17 by hanging the hook of the crane or the lifting rope on the upper flange 151. Then, spot welding and circumferential welding are performed on the connecting body 17 and the upper cone 15.

[0039] As described above, the lower cone 16 and the upper cone 15 are welded together via the connector 17. Then, the classifier housing 1 of this embodiment is installed on the corresponding component of an existing pendulum mill, such as... Figure 3The classifier consists of a rotor 2, a transmission component 3, a top cover 4, a motor 5, a motor pulley 6, a belt 7, and a large pulley 8. The top cover 4 is fixed to the upper flange 151. During actual operation of the pendulum mill, the output shaft of the motor 5 drives the motor pulley 6, belt 7, and large pulley 8 to rotate, which in turn drives the transmission component 3 and the classifier rotor 2 to rotate. The rotating classifier rotor 2 then classifies the powder inside the classifier housing 1.

[0040] During operation of the pendulum mill, the material ground by the pendulum mill is carried by the air into the material diffusion zone A1 of the classifier housing 1 (e.g., ...). Figure 3 Below the dotted line (as indicated), in this area, due to the larger inner diameter of the lower cone 16 at the top and smaller at the bottom, the airflow area suddenly increases, and the material is dispersed, preparing for the next stage of classification. As the airflow rises, the material is further carried into the powder classification zone A2 (e.g., Figure 3 Above the dotted line (as indicated), the high-speed rotation of the classifier rotor 2 forces the airflow in the powder classification zone A2 to rotate. Powder meeting the size requirements passes through the blades of the classifier rotor 2, while powder not meeting the size requirements is thrown to the upper cone 15 of the classifier housing 1 by centrifugal force, loses kinetic energy, and falls back into the mill for re-grinding. Because an arc-shaped connecting body 17 is provided between the lower cone 16 and the upper cone 15, the rate of change of cross-sectional area from the powder diffusion zone A1 to the powder classification zone A2 is continuous. The flow velocity and pressure changes at this point are also continuous, effectively reducing turbulence, system operating resistance, and system energy consumption. Simultaneously, the continuous and stable change in airflow velocity effectively reduces the impact of airflow variations on the powder classification zone, improving the classification accuracy of the classifier. Example 3

[0041] See appendix Figure 5 , 6 As shown, this embodiment is a further improvement on embodiment 2. To facilitate the lifting of the connecting body 17, in this embodiment, each set of connecting ears 18 is arranged vertically and oppositely, with two pins 182 detachably inserted into the connecting ear through hole I181 of each set of connecting ears. Of course, in this embodiment, the pins 182 can also be directly welded into the connecting ears 18. When it is detachable, one end of the pin 182 is fixedly connected to a pin cap 183. The pin cap 183 is coaxial with the pin 182 and its outer diameter is larger than the outer diameter of the pin 182 and the inner diameter of the connecting ear through hole I. The other end of the pin 182 is inserted into the connecting ear through hole I181 of the two connecting ears 18. A nut (not shown in the figure) can be threaded onto the pin 182 at this end. Thus, the pin 182 can be detachably and fixedly connected to the connecting ears 18.

[0042] The working principle and process of this embodiment are as follows: After positioning and fixing the lower cone 16, the hook of the lifting equipment is hooked onto the pin 182 to lift the connecting body 17. Then, the connecting body 17 is lifted above the lower cone 16 and aligned with the lower cone 16. Spot welding is then performed. Afterward, circumferential welding can be performed on the connecting body 17 and the lower cone 16, or only spot welding can be performed. After aligning the upper cone 15 with the connecting body 17, circumferential welding is performed uniformly. Since an upper flange 151 is welded on the upper cone 15, the upper cone 15 can be lifted and aligned with the connecting body 17 by hanging the hook of the crane or the lifting rope on the upper flange 151. Then, spot welding and circumferential welding are performed on the connecting body 17 and the upper cone 15.

[0043] As described above, the lower cone 16 and the upper cone 15 are welded together via the connector 17. Then, the classifier housing 1 of this embodiment is installed on the corresponding component of an existing pendulum mill, such as... Figure 3 The classifier consists of a rotor 2, a transmission component 3, a top cover 4, a motor 5, a motor pulley 6, a belt 7, and a large pulley 8. The top cover 4 is fixed to the upper flange 151. During actual operation of the pendulum mill, the output shaft of the motor 5 drives the motor pulley 6, belt 7, and large pulley 8 to rotate, which in turn drives the transmission component 3 and the classifier rotor 2 to rotate. The rotating classifier rotor 2 then classifies the powder inside the classifier housing 1.

[0044] During operation of the pendulum mill, the material ground by the pendulum mill is carried by the air into the material diffusion zone A1 of the classifier housing 1 (e.g., ...). Figure 3 Below the dotted line (as indicated), in this area, due to the larger inner diameter of the lower cone 16 at the top and smaller at the bottom, the airflow area suddenly increases, and the material is dispersed, preparing for the next stage of classification. As the airflow rises, the material is further carried into the powder classification zone A2 (e.g., Figure 3 Above the dotted line (as indicated), the high-speed rotation of the classifier rotor 2 forces the airflow in the powder classification zone A2 to rotate. Powder meeting the size requirements passes through the blades of the classifier rotor 2, while powder not meeting the size requirements is thrown to the upper cone 15 of the classifier housing 1 by centrifugal force, loses kinetic energy, and falls back into the mill for re-grinding. Because an arc-shaped connecting body 17 is provided between the lower cone 16 and the upper cone 15, the rate of change of cross-sectional area from the powder diffusion zone A1 to the powder classification zone A2 is continuous. The flow velocity and pressure changes at this point are also continuous, effectively reducing turbulence, system operating resistance, and system energy consumption. Simultaneously, the continuous and stable change in airflow velocity effectively reduces the impact of airflow variations on the powder classification zone, improving the classification accuracy of the classifier. Example 4

[0045] See appendix Figure 7 , 8As shown in Figures 9, 10, and 11, this embodiment is a further improvement on embodiment 3. In this embodiment, the pin 182 is designed to be detachable. Compared with the above embodiments, this embodiment can achieve positioning of the connecting body 17 when aligned with the lower cone 16 and the upper cone 15, respectively.

[0046] A positioning block 19 is rotatably sleeved on the pin 182 between each set of connecting ears. The positioning block 19 includes positioning block I191 and positioning block II192.

[0047] See Figure 12 As shown, a positioning block I through hole 1911 is provided on the positioning block I191 parallel to the axis of the pin 182. A connecting ear through hole II184 is coaxially provided on each of the two connecting ears 18 in each group. The connecting ear through hole II184 is opened on the circumference with the axis of the connecting ear through hole I181 as the center. The connecting ear through hole II184 is located inside and below the connecting ear through hole I181.

[0048] When the positioning block I191 rotates to abut against the outer side of the lower cone 16 and the positioning pin 193 is inserted into the connecting ear through hole II184 and the positioning block I through hole 1911, the connecting body 17 is coaxially arranged with the lower cone 16; the positioning pin 193 can be removed from the connecting ear through hole II184 and the positioning block I191.

[0049] The positioning block I191 includes a rotating part I1912 rotatably sleeved on the positioning pin 193 and a positioning part I1913 fixedly connected to one end of the rotating part I1912 away from the positioning pin 193. The positioning part I1913 is bent relative to the rotating part I1912, and the inner surface of the positioning part I1913 can abut against the outer surface of the lower cone 16. A rotating part I through hole 1914 is provided on the rotating part I1912, and the rotating part I through hole 1914 is rotatably sleeved on the pin 182.

[0050] See Figure 13 As shown, similar to the structure of positioning block I191, positioning block II192 is rotatably sleeved on the pin 182 between each group of connecting ears 18. Positioning block II192 has a through hole 1921 parallel to the axis of pin 182. Connecting ear through holes III185 are coaxially opened on each of the two connecting ears 18 in each group. Connecting ear through holes III185 are opened on the circumference with the axis of connecting ear through hole I181 as the center. Connecting ear through holes III185 are located on the inner side obliquely above connecting ear through hole I181.

[0051] When the positioning block II 192 rotates to abut against the upper cone 15 and the positioning pin 193 is inserted into the connecting ear through hole III 185 and the positioning block II through hole 1921, the connecting body 17 is coaxially arranged with the upper cone 15, and the positioning pin 193 can be removed from the connecting ear through hole III 185 and the positioning block II through hole 1921.

[0052] The positioning block II192 includes a rotating part II1922 rotatably sleeved on the positioning pin 193 and a positioning part II1923 fixedly connected to one end of the rotating part II1922 away from the positioning pin 193. The positioning part II1923 is bent relative to the rotating part II1922, and the inner surface of the positioning part II1923 can abut against the outer surface of the upper cone 15. A rotating part II through hole 1924 is provided on the rotating part II1922, and the rotating part II through hole 1924 is rotatably sleeved on the pin 182.

[0053] The working principle and process of this embodiment are as follows: After positioning and fixing the lower cone 16, the positioning pin 193 is inserted into the connecting lug hole III 185. The hook or rope of the lifting equipment is hooked onto the positioning pin 193 in the connecting lug hole III 185 to lift the connecting body 17. Alternatively, the existing inner support clamp can be used directly. The inner support clamp is fixed to the inner side of the connecting body 17 to fix it to the connecting body 17. The lifting equipment can lift the connecting body 17 through the inner support clamp. Then, the connector 17 is hoisted onto the lower cone 16, and the connector 17 and the lower cone 16 are initially aligned. The positioning block I191 is inserted into the inside of each set of two connecting ears 18, and the pin 182 is inserted into the connecting ear through hole I181 and the rotating part I through hole 1914 so that the positioning block I can be rotatably connected to the pin 182. like Figure 8 As shown, rotate the positioning block I191 downwards to align the through hole 1911 of the positioning block I with the through hole II184 of the connecting ear. Insert the positioning pin 193 into the through hole 1911 of the positioning block I and the through hole II184 of the connecting ear. At this point, the positioning block I is fixed and positioned. Fine-tune the connecting body 17 so that the inner side of the positioning block I191 abuts against the outer side of the lower cone 16. Then, similarly, install the other positioning blocks I191 and positioning pins 193. During installation, adjust the connecting... The body 17 is finely adjusted. In this embodiment, four sets of connecting ears 18 are evenly distributed, and correspondingly, four sets of positioning blocks I191, positioning blocks II192, pins 182, and positioning pins 193 are provided. Through the above process, the inner side of each set of positioning blocks I191 can abut against the outer side of the connecting body 17, thereby completing the positioning of the connecting body 17 on the lower cone 16. Then, spot welding or circumferential welding is performed. After that, the two positioning pins 193 and positioning blocks I191 are removed. Then, the upper cone 15 is hoisted onto the connector 17, and the upper cone 15 and the connector 17 are initially aligned. The positioning block II 192 is inserted into the inside of each set of two connecting ears 18, and the pin 182 is inserted into the connecting ear through hole I 181 and the rotating part II through hole 1924 so that the positioning block II 192 can be rotatably connected to the pin 182. like Figure 11 As shown, rotate the positioning block II192 upwards to align the through hole 1921 of the positioning block II with the through hole III185 of the connecting ear. Insert the positioning pin 193 into the through holes III and III185 of the connecting ear. At this time, the positioning block II192 is fixed and positioned. Fine-tune the upper cone 15 so that the inner side of the positioning block II192 abuts against the outer side of the upper cone 15. Similarly, install the other positioning blocks II192 and positioning pins 193, and fine-tune the upper cone 15 during installation. Through the above process, the inner side of each group of positioning blocks II192 can abut against the outer side of the upper cone 15, thereby completing the positioning of the upper cone 15 on the connector 17. Then, spot weld and circumferential weld the upper cone 15 and the connector 17. After the upper cone 15, connecting body 17, and lower cone 16 are all welded, the locating pin 193, pin shaft 182, and locating block II 192 can be removed.

[0054] Compared with existing technologies, by setting the connecting ear 18, it is not only convenient to hoist the connecting body 17 and even the air classifier housing 1, but also to position the connecting body 17 and the upper cone 15 during welding. Moreover, the structure is simple and the operation is convenient.

[0055] As described above, the lower cone 16 and the upper cone 15 are welded together via the connector 17. Then, the classifier housing 1 of this embodiment is installed on the corresponding component of an existing pendulum mill, such as... Figure 3 The classifier consists of a rotor 2, a transmission component 3, a top cover 4, a motor 5, a motor pulley 6, a belt 7, and a large pulley 8. The top cover 4 is fixed to the upper flange 151. During actual operation of the pendulum mill, the output shaft of the motor 5 drives the motor pulley 6, belt 7, and large pulley 8 to rotate, which in turn drives the transmission component 3 and the classifier rotor 2 to rotate. The rotating classifier rotor 2 then classifies the powder inside the classifier housing 1.

[0056] During operation of the pendulum mill, the material ground by the pendulum mill is carried by the air into the material diffusion zone A1 of the classifier housing 1 (e.g., ...). Figure 3 Below the dotted line (as indicated), in this area, due to the larger inner diameter of the lower cone 16 at the top and smaller at the bottom, the airflow area suddenly increases, and the material is dispersed, preparing for the next stage of classification. As the airflow rises, the material is further carried into the powder classification zone A2 (e.g., Figure 3Above the dotted line (as indicated), the high-speed rotation of the classifier rotor 2 forces the airflow in the powder classification zone A2 to rotate. Powder meeting the size requirements passes through the blades of the classifier rotor 2, while powder not meeting the size requirements is thrown to the upper cone 15 of the classifier housing 1 by centrifugal force, loses kinetic energy, and falls back into the mill for re-grinding. Because an arc-shaped connecting body 17 is provided between the lower cone 16 and the upper cone 15, the rate of change of cross-sectional area from the powder diffusion zone A1 to the powder classification zone A2 is continuous. The flow velocity and pressure changes at this point are also continuous, effectively reducing turbulence, system operating resistance, and system energy consumption. Simultaneously, the continuous and stable change in airflow velocity effectively reduces the impact of airflow variations on the powder classification zone, improving the classification accuracy of the classifier.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-resistance classifier housing structure for a pendulum mill, comprising an upper cone disposed above and a lower cone disposed below, characterized in that: An annular connector with an arc-shaped cross-section is provided between the upper cone and the lower cone. The upper cone, the lower cone, and the connector are all hollow. The upper end face of the connector is fixedly connected to the lower end face of the upper cone, and its lower end face is fixedly connected to the upper end face of the lower cone. The inner side of the connector at the connection with the upper cone is aligned with the inner side of the upper cone, and the inner side of the connector at the connection with the lower cone is aligned with the inner side of the lower cone.

2. The housing structure of a low-resistance classifier for a pendulum mill according to claim 1, characterized in that: Multiple sets of connecting ears are fixedly connected to the outer surface of the connector body, and each set of connecting ears has a connecting ear through hole I.

3. The housing structure of a low-resistance classifier for a pendulum mill according to claim 2, characterized in that: Two connecting ears are arranged opposite each other in each group, and a pin is detachably inserted into the through hole I of each connecting ear.

4. The housing structure of a low-resistance classifier for a pendulum mill according to claim 3, characterized in that: A positioning block I is rotatably sleeved on the pin between each set of connecting ears. A through hole of positioning block I is opened on the positioning block I parallel to the axis of the pin. A through hole II of connecting ear is opened on the circumference with the axis of the through hole I of connecting ear as the center. When the positioning block I rotates to abut against the outer side of the lower cone and the positioning pin is inserted into the through hole II of connecting ear and the through hole of positioning block I, the connecting body is coaxially arranged with the lower cone. The positioning pin can be removed from the through hole II of connecting ear and the positioning block I.

5. The housing structure of a low-resistance classifier for a pendulum mill according to claim 4, characterized in that: The positioning block I includes a rotating part I rotatably sleeved on a positioning pin and a positioning part I fixedly connected to one end of the rotating part I away from the positioning pin. The positioning part I is bent relative to the rotating part I, and the inner side of the positioning part I can abut against the outer side of the lower cone.

6. The housing structure of a low-resistance classifier for a pendulum mill according to claim 4, characterized in that: A positioning block II is rotatably sleeved on the pin between each set of connecting ears. A positioning block II through hole is opened on the positioning block II parallel to the pin axis. A connecting ear through hole III is opened on the circumference with the axis of the connecting ear through hole I as the center. When the positioning block II rotates to abut against the upper cone and the positioning pin is inserted into the connecting ear through hole III and the positioning block II through hole, the connecting body is coaxially arranged with the upper cone, and the positioning pin can be disassembled from the connecting ear through hole III and the positioning block II through hole.

7. The housing structure of a low-resistance classifier for a pendulum mill according to claim 6, characterized in that: The positioning block II includes a rotating part II rotatably sleeved on the positioning pin and a positioning part II fixedly connected to one end of the rotating part II away from the positioning pin. The positioning part II is bent relative to the rotating part II, and the inner side of the positioning part II can abut against the outer side of the upper cone.

8. The housing structure of a low-resistance classifier for a pendulum mill according to any one of claims 1-7, characterized in that: A lower flange is fixedly connected to the lower end face of the lower cone, and an upper flange is fixedly connected to the upper end face of the upper cone.

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