A screening device for an ultrafine grinding mill
Patent Information
- Application Number
- CN202522260761.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-27
AI Technical Summary
[0004]但是，所设置的筛网通常固定在筛分装置内，从而在振动时可能会限制筛网的振动幅度，进而可能会影响筛选效率
1、该用于超细粉磨机的筛分装置，能够提高筛分效率：通过弹性环板与弹簧的双重弹性连接，使筛分板振动幅度扩大，在筛分过程中，更大的振动幅度能让物料在筛网上充分跳动，以便于使符合粒度要求的物料更快通过筛网，不符合的物料也能更迅速地被分离，从而能提高筛选效率；
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Figure CN224778563U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grinding mills, and more particularly to a screening device for ultrafine grinding mills. Background Technology
[0002] Ultrafine grinding mills are core equipment for achieving ultrafine material processing, primarily used to grind solid materials such as limestone, talc, and calcium carbonate to micron or even nanometer-level fineness. Common types include air jet mills, ball mills, and vertical mills, with different types adaptable to materials requiring varying hardness and fineness. After grinding, the materials typically require sieving.
[0003] In related technologies, materials ground by ultrafine grinding mills often have particle sizes that do not meet the standards. To ensure the high uniformity of the finished product particle size, it is usually necessary to screen the ground materials using a screening device to recover the substandard coarse powder and re-grind it in the ultrafine grinding mill. Commonly used screening devices include ultrasonic vibrating screens, which integrate an ultrasonic system on the basis of traditional vibrating screens. They use high-frequency vibration to break up powder agglomerates, which can solve the problem of screen clogging caused by ultrafine powder.
[0004] However, the screens are usually fixed inside the screening device, which may limit the vibration amplitude of the screens during vibration, and thus may affect the screening efficiency.
[0005] Therefore, it is necessary to provide a screening device for ultrafine grinding mills to solve the above problems. Utility Model Content
[0006] To address the technical problem that the screens are typically fixed inside the screening device, which may limit the vibration amplitude of the screens during vibration and affect screening efficiency, this utility model provides a screening device for an ultrafine grinding mill.
[0007] This utility model provides a screening device for an ultrafine grinding mill, comprising: a screening machine, the screening machine including a vibrating base, a plurality of screening frames arranged on the vibrating base, a dust cover provided on the top of the plurality of screening frames, binding rings provided between adjacent screening frames and between the top screening frame and the dust cover, a screening plate arranged inside the screening frame, an elastic ring plate fixedly connected to the outer wall of the screening plate, a connecting ring plate fixedly connected to the outer wall of the elastic ring plate, and a plurality of supporting ring plates, each of the supporting ring plates corresponding to a fixed... A mounting ring plate is fixedly installed on the inner wall of each screening frame. The upper surface of the support ring plate is placed on the mounting ring plate. The upper surface of the mounting ring plate is fixedly connected to the lower surface of the connecting ring plate. Multiple springs are evenly and elastically connected in a circle between the upper surface of the mounting ring plate and the lower surface of the screening plate. Multiple mounting inserts are provided. Multiple mounting inserts are fixedly installed in a circle on the lower surface of the mounting ring plate. The mounting inserts pass through the support ring plate and are movably inserted between them. The support ring plate is fixed to the inner wall of the screening machine by bolts.
[0008] Preferably, the screening frame includes an annular frame, with a communication port on one side of the annular frame, and a discharge head connected to the communication port is fixedly connected to one side of the outer wall of the annular frame. Protruding rings are fixedly connected to the top and bottom of the outer wall of the annular frame, and the protruding rings are located inside the binding ring.
[0009] Preferably, the screening plate includes an annular plate, the outer wall of the annular plate is connected to the inner wall of the elastic annular plate, the upper end face of the spring is elastically connected to the lower surface of the annular plate, and a screen is fixedly connected to the inner wall of the annular plate.
[0010] Preferably, a protective ring plate is fixedly connected to the lower surface of the annular plate, the protective ring plate is located inside the mounting ring plate, and the spring is located outside the protective ring plate.
[0011] Preferably, the lower surface of the annular plate is circumferentially fixedly connected with a plurality of guide rods, each guide rod passing through the interior of each spring, the bottom end of the guide rod penetrating the mounting annular plate, and the two are slidably connected.
[0012] Preferably, a limiting plate is fixedly connected to the lower end face of the guide rod, and the limiting plate is located below the mounting ring plate.
[0013] Compared with related technologies, the screening device for an ultrafine grinding mill provided by this utility model has the following beneficial effects: 1. This screening device for ultrafine grinding mill can improve screening efficiency: through the double elastic connection of elastic ring plate and spring, the vibration amplitude of the screening plate is expanded. During the screening process, the larger vibration amplitude allows the material to jump fully on the screen, so that the material that meets the particle size requirements can pass through the screen faster, and the material that does not meet the requirements can be separated more quickly, thereby improving screening efficiency. 2. This screening device for ultrafine grinding mill has screen mesh openings that decrease in size from top to bottom in different screening frames, enabling multi-level grading and screening. At the same time, the guide rod guides the vibration direction of the annular plate, preventing lateral swaying or tilting due to vibration offset, ensuring that the spring deformation is within the preset axial extension range, so that the annular plate drives the screen to vibrate stably, ensuring the movement trajectory of the material on the screen surface, and improving screening accuracy. 3. The screening device for ultrafine grinding mill is equipped with a protective ring plate and annular plate, which together form a separate space to protect the spring, preventing particulate matter from affecting the spring's use. The guide rod and limiting plate work together to limit the vibration position of the annular plate, prevent the spring from being overstretched, and reduce the torsional or fatigue damage to the spring caused by lateral forces, thereby extending the spring's service life and reducing equipment maintenance costs. Attached Figure Description
[0014] Figure 1 A schematic diagram of the overall structure of this utility model; Figure 2 A schematic diagram of the screening frame structure provided by this utility model; Figure 3 This is a cross-sectional view of the screening frame provided by this utility model; Figure 4 Provided for this utility model Figure 3 A magnified schematic diagram of the structure at point A in the diagram.
[0015] The following are the labels in the diagram: 1. Screening machine; 101. Vibrating base; 102. Screening frame; 1021. Annular frame; 1022. Connecting port; 1023. Discharge head; 1024. Protruding ring; 103. Dust cover; 104. Binding ring; 2. Screening plate; 201. Annular plate; 202. Screen mesh; 3. Elastic ring plate; 4. Connecting ring plate; 5. Supporting ring plate; 6. Mounting ring plate; 7. Spring; 8. Mounting insert plate; 9. Bolt; 10. Protective ring plate; 11. Guide rod; 12. Limiting plate. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] Please refer to the following: Figures 1 to 4A screening device for an ultrafine grinding mill includes: a screening machine 1, the screening machine 1 including a vibrating base 101, a plurality of screening frames 102 arranged on the vibrating base 101, a dust cover 103 arranged on the top of the plurality of screening frames 102, and binding rings 104 arranged between adjacent screening frames 102 and between the top screening frame 102 and the dust cover 103. A screening plate 2 is arranged inside the screening frame 102, and an elastic ring plate 3 is fixedly connected to the outer wall of the screening plate 2. A connecting ring plate 4 is fixedly connected to the outer wall of the elastic ring plate 3. A plurality of supporting ring plates 5 are provided. Each support ring plate 5 is fixedly installed on the inner wall of each screening frame 102. An installation ring plate 6 is placed on the upper surface of the support ring plate 5. The upper surface of the installation ring plate 6 is fixedly connected to the lower surface of the connecting ring plate 4. Multiple springs 7 are evenly and elastically connected in a circular pattern between the upper surface of the installation ring plate 6 and the lower surface of the screening plate 2. Multiple installation insert plates 8 are provided. Multiple installation insert plates 8 are fixedly installed in a circular pattern on the lower surface of the installation ring plate 6. The installation insert plates 8 penetrate the support ring plate 5 and are movably inserted between the two. The support ring plate 5 is fixed to the inner wall of the screening machine 1 by bolts 9.
[0018] In the specific implementation process, the screening machine 1 installed in the screening device for the ultrafine grinding mill is an ultrasonic vibrating screen, which is a high-efficiency and high-precision fine powder screening equipment. During installation, the screening machine 1 can be placed below the discharge port of the ultrafine grinding mill, and the inlet of the screening machine 1 can be connected to the discharge port of the ultrafine grinding mill, so that the ground material can directly enter the screening machine 1. The bottom of the screening machine 1 is a vibrating base 101, which provides basic vibration power for the overall screening. Multiple screening frames 102 are stacked vertically above the vibrating base 101. Screening plates 2 are installed inside the screening frames 102. Multi-level grading and screening can be performed through the screening plates 2 inside different screening frames 102. A dust cover 103 is installed at the top of the top screening frame 102 to prevent ultrafine powder from being smeared. During vibration, dust spreads. Adjacent screening frames 102 and the top screening frame 102 and dust cover 103 are fastened together by clamping rings 104 to improve sealing and facilitate disassembly and maintenance. The outer wall of the screening plate 2 is fixedly connected to the connecting ring plate 4 by an integrally formed elastic ring plate 3. The elastic ring plate 3 is made of elastic material and can adapt to deformation with vibration. A support ring plate 5 is fixed on the inner wall of the screening frame 102. An installation ring plate 6 is supported on the upper surface of the support ring plate 5. The lower part of the connecting ring plate 4 is fixed to the installation ring plate 6. Multiple springs 7 that can form elastic support are evenly distributed along the circumference between the upper surface of the installation ring plate 6 and the lower surface of the screening plate 2. This allows the screening frame 102 to generate a certain resonance through the multiple springs 7 when it vibrates, thereby increasing the vibration amplitude of the screening plate 2. Furthermore, multiple mounting plates 8 are circumferentially fixed on the lower surface of the mounting ring plate 6. The mounting plates 8 penetrate vertically through the supporting ring plate 5 and are fixed to the inner wall of the screening frame 102 by bolts 9. This restricts the installation position of the mounting ring plate 6 on the supporting ring plate 5 and improves installation stability. In this application, the double elastic connection between the elastic ring plate 3 and the spring 7 expands the vibration amplitude of the screening plate 2, thereby improving the screening efficiency. Specifically, the screening machine 1 is an ultrasonic vibrating screen, which is a relatively mature device with existing technology. The specific model can be selected according to actual needs. The power supply can be a built-in power supply or a mains power supply. The specific power supply method is selected according to the situation. The dust cover 103 has a feed port on the top.
[0019] See Figure 1 , Figure 2 and Figure 3 As shown, the screening frame 102 includes an annular frame 1021. A communication port 1022 is provided on one side of the annular frame 1021. A discharge head 1023 connected to the communication port 1022 is fixedly connected to one side of the outer wall of the annular frame 1021. A protruding ring 1024 is fixedly connected to the top and bottom of the outer wall of the annular frame 1021. The protruding ring 1024 is located inside the binding ring 104.
[0020] In the specific implementation process, the installation position of the support ring plate 5 can be restricted by the annular frame 1021, the communication port 1022 is opened on the side wall of the annular frame 1021 and is located on the side of the connecting ring plate 4, so that the material screened off the upper surface of the screening plate 2 can enter the discharge head 1023 through the communication port 1022 and be discharged outward. The protruding ring 1024 between adjacent annular frames 1021 can be fixed by the binding ring 104. Specifically, it should be noted that the discharge head 1023 is equipped with a discharge valve inside to control the discharge.
[0021] See Figure 2 , Figure 3 and Figure 4 As shown, the screening plate 2 includes an annular plate 201. The outer wall of the annular plate 201 is connected to the inner wall of the elastic annular plate 3. The upper end face of the spring 7 is elastically connected to the lower surface of the annular plate 201. A screen 202 is fixedly connected to the inner wall of the annular plate 201.
[0022] In the specific implementation process, the installation position of the screen 202 can be restricted by the ring plate 201, and the material can be screened by the screen 202. The mesh size of the screen 202 in different screening frames 102 decreases from top to bottom to facilitate screening of different particle sizes.
[0023] See Figure 3As shown, a protective ring plate 10 is fixedly connected to the lower surface of the annular plate 201. The protective ring plate 10 is located inside the mounting ring plate 6, and the spring 7 is located outside the protective ring plate 10.
[0024] In the specific implementation process, during the screening process, the protective ring plate 10, the annular plate 201, the elastic ring plate 3, the connecting ring plate 4 and the mounting ring plate 6 cooperate to form a separate space, which can play a certain protective role for the installed spring 7, so as to prevent particulate matter from affecting the use of the spring 7.
[0025] See Figure 4 As shown, the lower surface of the annular plate 201 is circumferentially fixed with multiple guide rods 11. Each guide rod 11 passes through the interior of each spring 7, and the bottom end of the guide rod 11 passes through the mounting annular plate 6, and the two are slidably connected.
[0026] In the specific implementation process, the guide rod 11 can guide the vibration direction of the annular plate 201 to prevent lateral swaying or tilting caused by vibration deviation, thereby ensuring that the deformation of the spring 7 is always within the preset axial extension range, so as to reduce the torsion or fatigue damage of the spring 7 caused by lateral force and extend its service life. At the same time, it can also make the annular plate 201 drive the screen 202 to vibrate stably, so as to ensure the movement trajectory of the material on the screen 202 surface and prevent the decrease in screening accuracy caused by the disorder of vibration direction.
[0027] See Figure 4 As shown, a limiting plate 12 is fixedly connected to the lower end face of the guide rod 11, and the limiting plate 12 is located below the mounting ring plate 6.
[0028] In the specific implementation process, the limiting plate 12 and the guide rod 11 cooperate to limit the movement position of the annular plate 201 when it vibrates, so as to prevent the spring 7 from being overstretched.
[0029] The working principle of the screening device for an ultrafine grinding mill provided by this utility model is as follows: When the screening device for the ultrafine grinding mill is in operation, the screening machine 1 is placed below the discharge port of the ultrafine grinding mill and connected to the feed port, so that the ground material directly enters the screening machine 1. The vibrating base 101 provides basic vibration power, driving multiple stacked screening frames 102 above to vibrate. Screening plates 2 are set inside the screening frames 102, and screen meshes 202 are fixed in the annular plate 201 of the screening plates 2. The mesh size of the screen meshes 202 in different screening frames 102 decreases from top to bottom. During vibration, the material jumps on the screen meshes 202, and the material screened on the screen meshes 202 passes through the connecting port 102. 2. The material enters the discharge head 1023 and is discharged. The elastic ring plate 3 on the outer wall of the screening plate 2 adapts to the vibration and deforms accordingly. The lower part of the connecting ring plate 4 is fixed to the mounting ring plate 6. Multiple springs 7 between the upper surface of the mounting ring plate 6 and the lower surface of the screening plate 2 form elastic support, which increases the vibration amplitude of the screening plate 2. The mounting insert plate 8 on the lower surface of the mounting ring plate 6 passes through the supporting ring plate 5 and is fixed, limiting the installation position. At the same time, the guide rod 11 passes through the inside of the spring 7 and the bottom end passes through the mounting ring plate 6 to guide the vibration of the ring plate 201. The limiting plate 12 limits the movement of the ring plate 201 and prevents the spring 7 from being overstretched.
[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A screening device for an ultrafine grinding mill, characterized in that, include: A screening machine (1) includes a vibrating base (101), on which a plurality of screening frames (102) are provided. A dust cover (103) is provided on the top of the plurality of screening frames (102). A binding ring (104) is provided between adjacent screening frames (102) and between the top screening frame (102) and the dust cover (103). A screening plate (2) is provided inside the screening frame (102). An elastic ring plate (3) is fixedly connected to the outer wall of the screening plate (2). A connecting ring plate (4) is fixedly connected to the outer wall of the elastic ring plate (3). Multiple support ring plates (5) are provided, each support ring plate (5) is fixedly disposed on the inner wall of each screening frame (102). An mounting ring plate (6) is placed on the upper surface of the support ring plate (5). The upper surface of the mounting ring plate (6) is fixedly connected to the lower surface of the connecting ring plate (4). Multiple springs (7) are circumferentially and elastically connected between the upper surface of the mounting ring plate (6) and the lower surface of the screening plate (2). Multiple mounting plates (8) are provided. The multiple mounting plates (8) are fixedly arranged in a circle on the lower surface of the mounting ring plate (6). The mounting plates (8) penetrate the support ring plate (5) and are movably connected to each other. The support ring plate (5) is fixed to the inner wall of the screening machine (1) by bolts (9).
2. The screening device for an ultrafine grinding mill according to claim 1, characterized in that, The screening frame (102) includes an annular frame (1021), with a communication port (1022) on one side of the annular frame (1021). A discharge head (1023) connected to the communication port (1022) is fixedly connected to one side of the outer wall of the annular frame (1021). A protruding ring (1024) is fixedly connected to the top and bottom of the outer wall of the annular frame (1021), and the protruding ring (1024) is located inside the binding ring (104).
3. A screening device for an ultrafine grinding mill according to claim 1, characterized in that, The screening plate (2) includes an annular plate (201), the outer wall of the annular plate (201) is connected to the inner wall of the elastic annular plate (3), the upper end face of the spring (7) is elastically connected to the lower surface of the annular plate (201), and a screen (202) is fixedly connected to the inner wall of the annular plate (201).
4. A screening device for an ultrafine grinding mill according to claim 3, characterized in that, A protective ring plate (10) is fixedly connected to the lower surface of the annular plate (201). The protective ring plate (10) is located inside the mounting ring plate (6), and the spring (7) is located outside the protective ring plate (10).
5. A screening device for an ultrafine grinding mill according to claim 3, characterized in that, The lower surface of the annular plate (201) is circumferentially fixed with a plurality of guide rods (11), each guide rod (11) passing through the interior of each spring (7), the bottom end of the guide rod (11) passing through the mounting ring plate (6), and the two are slidably connected.
6. A screening device for an ultrafine grinding mill according to claim 5, characterized in that, The lower end face of the guide rod (11) is fixedly connected to a limiting plate (12), and the limiting plate (12) is located below the mounting ring plate (6).