A combined device for the classification of mineral products

Abstract

The utility model relates to mineral processing equipment technical field discloses a kind of combined device of mineral grading screening, including screening base, damper fixed in the top end of screening base and screening table fixed in the top end of damper, screening table inside is rotatably connected with screening shaft, screening screen one and screening screen two are laid on the outer surface of screening shaft, mounting plate and high-frequency vibrator are fixed on the both sides of screening table, support base is fixed in the bottom end inside of screening base, low-frequency vibrator is fixed in the top end of support base, and rotatably connected with the conveying shaft of conveying net laying.

Description

Technical Field

[0001] This utility model relates to the field of mineral processing equipment technology, and in particular to a combined device for mineral grading and screening. Background Technology

[0002] Mineral resources are usually mixed with a large number of impurities and have different particle sizes after mining. In order to meet the process requirements of subsequent smelting or deep processing, the ore must be strictly graded and screened. Most existing mineral screening equipment adopts a simple vibrating screen structure, which uses a motor to drive the screen box to vibrate as a whole to achieve material stratification and screening. However, such equipment has exposed obvious structural defects in actual operation.

[0003] Traditional screening devices typically mount the screening mechanism directly onto the base via rigid components. During high-intensity screening operations, the enormous vibration force is transmitted to the bottom support structure without any buffering. Long-term rigid impact can not only cause cracks in the base welds or loosening of bolts, but also shorten the overall service life of the equipment. At the same time, the single-frequency vibration mode often makes it difficult to simultaneously ensure the rapid transport of large ore particles and the thorough separation of fine impurities, resulting in the final screening accuracy failing to meet high standards and failing to achieve efficient and stable multi-stage screening effects.

[0004] Therefore, this utility model proposes a combined device for mineral grading and screening to address the shortcomings of existing technologies. Utility Model Content

[0005] In view of the problems commonly found in existing mineral grading and screening equipment, such as rigid connections leading to damage to the base due to high-intensity vibration, the inability of a single screening mode to simultaneously handle the conveying of large particles and the separation of fine impurities resulting in low grading accuracy, and poor structural reliability during long-term operation, this utility model aims to provide a combined mineral grading and screening device with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a combined device for mineral grading and screening, comprising: a screening base, a damper fixed to the top of the screening base, and a screening platform fixed to the top of the damper. The screening platform is rotatably connected to a screening shaft located at the rear end and a screening shaft located in the middle. A screening mesh (first type) is laid on the outer surface of the screening shaft located at the rear end, and a screening mesh (second type) is laid on the outer surface of the screening shaft located in the middle. Mounting plates are fixed to both sides of the screening platform, and a high-frequency vibrator is fixed to the side of the mounting plate away from the screening platform. A support base is fixed to the inner bottom end of the screening base, and low-frequency vibrators are fixed to both sides of the top end of the support base. A conveying shaft is rotatably connected to the top end of the support base, and a conveying mesh is laid on the outer surface of the conveying shaft.

[0007] Preferably, the screening table has two sets of connecting holes at its inner rear end and inner middle. The connecting holes are staggered vertically. The two ends of the screening shaft are rotatably connected to the inner side of the connecting holes. This staggered design is conducive to forming a stepped screening path and improving the material turning and stratification effect.

[0008] Preferably, a screening motor is fixed on the left side of the screening base, and the output end of the screening motor is fixedly connected to the screening shaft. The screening motor, as a power source, can stably drive the first screening screen and the second screening screen to transport materials.

[0009] Preferably, a connecting rod is fixed to the top of one side of each of the two mounting plates. The connecting rod connects the two mounting plates to form a reinforcement connection. Through the lateral support of the connecting rod, the resonance and loosening of the side plates caused by high-frequency vibration can be effectively suppressed, thereby improving the rigidity of the overall structure.

[0010] Preferably, the inner front end of the screening table is provided with a conveying port, and the support base is located directly below the conveying port. The conveying port is used to transport the ore screened by the first screening screen and the second screening screen downwards, ensuring that the upper material can be smoothly and accurately transferred to the lower processing area.

[0011] Preferably, the top four corners of the support base are fixed with fixing blocks, and the two ends of the conveying shaft are rotatably connected to the inner side of the fixing blocks. The fixing blocks limit the movement of the conveying shaft to ensure that the conveying shaft remains axially stable during rotation and to prevent deviation.

[0012] Preferably, a support plate is fixed to the top right side of the support base, and a conveying motor is fixed to the top of the support plate. The output end of the conveying motor is fixedly connected to one side of the conveying shaft. The lower conveying network is driven by the independent conveying motor, and the conveying speed can be adjusted independently according to actual needs.

[0013] Preferably, a collection trough is fixed to the front side of the support base. The collection trough is located at the end of the conveying network to collect minerals, which facilitates the centralized processing or transfer of the finished product after multiple fine screenings.

[0014] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art where the rigid connection of the ore screening device directly transmits high-frequency vibration to the base, causing fatigue damage to the equipment foundation structure, by setting a damper under the screening table for flexible connection support. It achieves the effect of effectively reducing the rigid impact of mechanical vibration on the base, extending the overall service life of the equipment and improving operational stability.

[0015] 2. This utility model, by adopting a combination structure of a screening screen with a built-in front and rear dual-axis drive in the upper screening platform and a high-frequency vibrator, and a conveyor network in the lower support base and a low-frequency vibrator, solves the problems of low classification accuracy and incomplete separation of fine impurities in traditional single-frequency or single-stage screening devices for complex ores. It achieves the effect of using high and low frequency composite vibration to perform three-stage fine screening of ores, significantly improving the purity of mineral classification and screening efficiency.

[0016] 3. This utility model solves the problem of resonance, loosening or displacement of the lateral mounting plates during the operation of the high-frequency vibrator by setting a transverse connecting rod at the top of the mounting plates on both sides of the screening table, which affects the overall tightness of the structure. It achieves the effect of strengthening the rigid connection of the mounting structure on both sides and ensuring the stability and reliability of the relative positions of the components of the device under high-intensity vibration environment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a combined device for mineral grading and screening proposed in this utility model. Figure 2 This is a schematic diagram of the damper structure of a combined device for mineral grading and screening proposed in this utility model. Figure 3 This is a structural exploded view of the screening shaft of a combined device for mineral grading and screening proposed in this utility model; Figure 4 This is a structural breakdown diagram of the fixed block of a combined device for mineral grading and screening proposed in this utility model.

[0018] Legend: 1. Screening base; 2. Damper; 3. Screening table; 4. Connecting hole; 5. Screening shaft; 6. Screening screen one; 7. Screening screen two; 8. Conveying port; 9. Mounting plate; 10. High-frequency vibrator; 11. Connecting rod; 12. Screening motor; 13. Support base; 14. Conveying net; 15. Low-frequency vibrator; 16. Support plate; 17. Conveying motor; 18. Collection trough; 19. Fixing block; 20. Conveying shaft. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in 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, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0020] Example: Please refer to Figures 1 to 4 This utility model provides a combined device for mineral grading and screening, which aims to solve the structural defects in the existing mineral screening devices, such as the large damage to the equipment base caused by vibration during the grading and screening process and the lack of multi-frequency vibration combination leading to poor screening and grading effect.

[0021] Please refer to Figure 1 and Figure 2 A combined device for mineral grading and screening includes a screening base 1 and a damper 2 fixedly connected to the top of the screening base 1. The screening base 1 serves as the mounting base for the entire device to provide stable support. The damper 2 is fixedly connected between the screening base 1 and the screening table 3. The damper 2 is used to reduce the mechanical vibration generated by the screening table 3 during operation and transmit it to the screening base 1, thereby protecting the screening base 1 from rigid impact damage. The screening table 3 is fixedly connected to the top of the damper 2. The screening table 3 is used to support the screening shaft 5 and related screening components.

[0022] Please refer to Figure 1 and Figure 3 Two sets of connecting holes 4 are provided on the inner rear end and inner middle of the screening platform 3. The two sets of connecting holes 4 are staggered vertically. Screening shafts 5 are rotatably connected through the connecting holes 4. The screening shafts 5 are divided into front and rear sets, which are respectively installed at the rear end and middle of the inner side of the screening platform 3. Screening mesh is laid on the outer surface of the screening shafts 5 according to different screening requirements. Screening mesh 6 is laid on the outer surface of the set of screening shafts 5 located at the inner rear end. Screening mesh 6 is used for preliminary screening of large particles of ore. Screening mesh 7 is laid on the outer surface of the set of screening shafts 5 located at the inner middle. Screening mesh 7 is used to cooperate with screening mesh 6 to further refine the ore. Screening motor 12 is fixedly connected to the left side of the screening base 1. The output end of screening motor 12 is fixedly connected to one end of screening shaft 5. Starting screening motor 12 can drive screening shaft 5 to rotate, thereby driving screening mesh 6 and screening mesh 7 to continuously transport the ore forward.

[0023] To improve the efficiency and quality of upper-level screening, mounting plates 9 are fixedly connected to the bottom of both sides of the screening table 3. A high-frequency vibrator 10 is fixedly connected to the side of the mounting plate 9 away from the screening table 3. The excitation force generated by the high-frequency vibrator 10 during operation is transmitted to the screening table 3, screening screen 6, and screening screen 7 through the mounting plate 9, so as to perform high-frequency vibration screening of the ore, prevent the screening screen holes from clogging and accelerate the material stratification. A connecting rod 11 is fixedly connected between the top of one side of the two mounting plates 9. The connecting rod 11 spans horizontally across the top of the screening table 3. The connecting rod 11 is used to connect the two mounting plates 9 to strengthen the connection tightness of the overall structure of the device and prevent the mounting plates 9 from loosening due to high-frequency vibration.

[0024] Please refer to Figure 1 and Figure 4A combination device for mineral grading and screening also includes a support base 13. A conveying port 8 is provided at the front end of the inner side of the screening table 3, penetrating the table surface of the screening table 3. The position of the conveying port 8 corresponds to the end of the upper screening path. The conveying port 8 is used to guide the ore screened by screening mesh 6 and screening mesh 7 downwards. The support base 13 is fixedly connected to the inner side of the bottom end of the screening base 1. The two sides of the support base 13 are fixed to the inner side of the bottom end of the screening base 1. The support base 13 is located directly below the conveying port 8. The position of the support base 13 ensures that it can accurately receive the ore falling from the conveying port 8. To prevent materials from scattering outside the equipment, low-frequency vibrators 15 are fixedly connected to both sides of the top of the support base 13. The low-frequency vibrators 15 are fixedly installed on the surface of the support base 13 and are used to generate low-frequency mechanical vibration. The vibration waves generated by the low-frequency vibrators 15 are transmitted to the support base 13 and the conveying components subsequently installed on the support base 13. The ore that has fallen after being processed by the previous process is screened for the third time by the low-frequency vibrators 15. The low-frequency vibrators 15 and the high-frequency vibrators 10 on the upper layer form a high-low frequency combined screening mode, thereby improving the accuracy and efficiency of mineral grading.

[0025] As a preferred embodiment, for constructing the lower conveying and screening structure, please refer to... Figure 4 The support base 13 has four fixed blocks 19 at its top corners. The fixed blocks 19 are vertically installed in a block-like structure. The inner side of the fixed blocks 19 has bearing holes for installing rotating parts. A conveying shaft 20 is arranged between the fixed blocks 19. The two ends of the conveying shaft 20 are rotatably connected to the bearing holes on the inner side of the fixed blocks 19. The fixed blocks 19 provide support and limit the conveying shaft 20, ensuring that the conveying shaft 20 remains axially stable during rotation and preventing deviation.

[0026] As a further preferred embodiment, in order to realize the conveying function of the lower layer material, a support plate 16 is fixedly connected to the top right side of the support base 13. The support plate 16 serves as the mounting platform for the power source. A conveying motor 17 is fixedly connected to the top of the support plate 16. The output end of the conveying motor 17 is fixedly connected to one side of the conveying shaft 20. After the conveying motor 17 is started, it can drive the conveying shaft 20 to rotate. A conveying net 14 is laid on the outer surface of the conveying shaft 20. The conveying net 14 forms a closed-loop conveyor belt structure. The conveying net 14 rotates in a cycle under the drive of the conveying shaft 20. The conveying net 14, together with the low-frequency vibrator 15, smoothly conveys the minerals that have undergone three screenings forward.

[0027] As another preferred embodiment, in order to achieve effective collection of the final screening product, a collection trough 18 is fixedly connected to the front side of the support base 13. The collection trough 18 is located at the end of the conveying network 14. When the mineral is transported to the end with the conveying network 14, it falls into the collection trough 18 under the action of gravity. The collection trough 18 is used to collect the finished mineral after three screening processes, which is convenient for subsequent transfer and processing.

[0028] Working principle: When assembling the combined device for mineral grading and screening, firstly, multiple dampers 2 are fixed to the top of the screening base 1. The dampers 2 are used to reduce vibration. A screening table 3 is fixed to the top of the dampers 2. The screening table 3 is used to support other components. Two sets of connecting holes 4 are opened at the inner rear end and the inner middle of the screening table 3, and the two sets of connecting holes 4 are staggered vertically. Other components are connected through the connecting holes 4. The two sets of screening shafts 5 are rotatably connected to the inner side of the connecting holes 4. At the same time, screening mesh 1 6 is laid on the outer surface of the inner rear end screening shaft 5, and screening mesh 2 7 is laid on the outer surface of the inner middle screening shaft 5. Then, the screening motor 12 is fixed to the left side of the screening base 1, and the output end of the screening motor 12 is fixedly connected to the screening shaft 5. The bottom ends of one side of the two mounting plates 9 are fixed to the two sides of the screening table 3, and the high-frequency vibrator 10 is fixed to the mounting plate 9. On the other side, a connecting rod 11 is fixed to the top of one side of the two mounting plates 9. The connecting rod 11 makes the device connection tighter. The two sides of the support base 13 are fixed to the inner side of the bottom of the screening base 1. At the same time, the support base 13 is located directly below the conveying port 8. Low frequency vibrators 15 are fixed to the top two sides of the support base 13. Fixing blocks 19 are fixed to the four corners of the top of the support base 13. The two ends of the conveying shaft 20 are rotatably connected to the inner side of the fixing blocks 19. The fixing blocks 19 limit the position of the conveying shaft 20. A support plate 16 is fixed to the top right side of the support base 13. The conveying motor 17 is fixed to the top of the support plate 16. The output end of the conveying motor 17 is fixed to one side of the conveying shaft 20. Then, the conveying net 14 is laid on the outer surface of the conveying shaft 20. A collection trough 18 is fixed to the front side of the support base 13. During operation, the screening motor 12 is started, and the ore is transported forward using screening screen 6 and screening screen 7. The ore is screened twice by starting the high-frequency vibrator 10. A conveying port 8 is provided at the front end of the inner side of the screening table 3. The screened ore is transported downward to the support base 13 area through the conveying port 8. The ore is screened a third time by starting the low-frequency vibrator 15. The conveying motor 17 is started to drive the conveying shaft 20 to rotate. At the same time, the conveying screen 14 transports the minerals screened three times forward. The minerals screened three times are collected through the collection trough 18.

Claims

1. A combined device for mineral grading and screening, comprising: Screening base (1), damper (2) fixed to the top of the screening base (1), and screening table (3) fixed to the top of the damper (2). The feature is that the inner side of the screening table (3) is rotatably connected to a screening shaft (5) located at the rear end and a screening shaft (5) located in the middle. The outer surface of the screening shaft (5) located at the rear end is covered with a screening mesh (6), and the outer surface of the screening shaft (5) located in the middle is covered with a screening mesh (7). The two sides of the screening table (3) are fixed with mounting plates (9). The side of the mounting plate (9) away from the screening table (3) is fixed with a high-frequency vibrator (10). The inner side of the bottom end of the screening base (1) is fixed with a support base (13). The two sides of the top end of the support base (13) are fixed with low-frequency vibrators (15). The top end of the support base (13) is rotatably connected with a conveying shaft (20). The outer surface of the conveying shaft (20) is covered with a conveying mesh (14).

2. The combined device for mineral grading and screening according to claim 1, characterized in that, The screening table (3) has two sets of connecting holes (4) at its inner rear end and inner middle. The connecting holes (4) are staggered vertically. The two ends of the screening shaft (5) are rotatably connected to the inner side of the connecting holes (4).

3. The combined device for mineral grading and screening according to claim 1, characterized in that, A screening motor (12) is fixed on the left side of the screening base (1), and the output end of the screening motor (12) is fixedly connected to the screening shaft (5).

4. The combined device for mineral grading and screening according to claim 1, characterized in that, A connecting rod (11) is fixed to the top of one side of each of the two mounting plates (9).

5. The combined device for mineral grading and screening according to claim 1, characterized in that, The screening table (3) has a conveying port (8) at its inner front end, and the support base (13) is located directly below the conveying port (8).

6. The combined device for mineral grading and screening according to claim 1, characterized in that, The top four corners of the support base (13) are fixed with fixing blocks (19), and the two ends of the conveying shaft (20) are rotatably connected to the inside of the fixing blocks (19). The fixing blocks (19) limit the movement of the conveying shaft (20).

7. The combined device for mineral grading and screening according to claim 1, characterized in that, A support plate (16) is fixed to the top right side of the support base (13), and a conveying motor (17) is fixed to the top of the support plate (16). The output end of the conveying motor (17) is fixedly connected to one side of the conveying shaft (20).

8. The combined device for mineral grading and screening according to claim 1, characterized in that, A collection trough (18) is fixed to the front side of the support base (13), and the collection trough (18) is located at the conveying end of the conveying net (14).

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