Iron ore dry pre-selection grading and screening integrated machine

Abstract

The utility model discloses a kind of iron ore dry preselection grading screening integrated machine, including shell, shell inner bottom is inclinedly arranged, screen plate is provided in shell, screen plate is set as U-shaped groove, screen hole on screen plate is set in groups and each group equidistantly arranges, and raised portion is provided between the screen hole of adjacent group, raised portion is integrally formed with screen plate, movable mechanism is provided in both sides in shell, movable mechanism is connected with screen plate, fixed mounting has machine base on screen plate upper end, fixed mounting has servo motor on machine base, eccentric block is fixedly installed on servo motor output shaft end. By setting screen plate as inclined, material in screen plate will slide down under the action of gravity, by setting multiple raised portion, the material sliding down is blocked, so that material will not directly slide to screen plate lower end. Multiple raised portion can extend the residence time of material on screen plate upper end, by extending residence time, fine particle in material can be more fully permeated through screen hole, can improve screening efficiency and screening purity.

Description

Technical Field

[0001] This utility model relates to the technical field of iron ore screening devices, specifically to an integrated dry pre-selection and grading screening machine for iron ore. Background Technology

[0002] Dry iron ore screening equipment is an important piece of equipment in iron ore processing, mainly used for screening and classifying dry iron ore. It typically consists of a frame, a transmission screening device, and transmission connectors. Multi-shaft rotation propels the material forward to complete the screening process. During screening, the screen plates on the screen shaft intersect to form screen holes. Material smaller than the screen holes falls and is collected, while material larger than the screen holes continues to move forward. This device requires no water, making it suitable for water-scarce areas. It also boasts advantages such as simple structure, convenient operation, and low energy consumption. Furthermore, its high screening efficiency effectively improves the grade and recovery rate of iron ore, making it widely used in iron ore beneficiation production lines and a key piece of equipment for enhancing beneficiation efficiency and economic benefits.

[0003] Existing dry pre-selection and grading screening devices for iron ore suffer from insufficient material residence time on the screen plate during screening. This results in fine particles failing to fully pass through the screen openings, leading to a reduced fine particle content in the undersize material and decreased screening efficiency. Furthermore, the incomplete screening of fine particles may result in a higher concentration of fine particles in the oversize material, affecting screening purity and consequently impacting subsequent mineral processing parameters. Reduced screening efficiency and purity can prevent the equipment from reaching its expected processing capacity, impacting the overall efficiency of the mineral processing production line. To address these issues, we propose an integrated dry pre-selection and grading screening machine for iron ore.

[0004] Practical content

[0005] Therefore, this utility model provides an integrated dry pre-selection, grading, and screening machine for iron ore to solve the above-mentioned problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dry pre-sorting and grading screening machine for iron ore includes a housing with an inclined bottom. A screen plate is installed inside the housing, and the screen plate is U-shaped. The screen holes on the screen plate are grouped and equidistantly arranged in each group. A protrusion is provided between adjacent groups of screen holes, and the protrusion is integrally formed with the screen plate. Movable mechanisms are provided on both sides of the housing and are connected to the screen plate. A base is fixedly installed on the upper end of the screen plate, and a servo motor is fixedly installed on the base. An eccentric block is fixedly installed on the output shaft end of the servo motor. A sealing plate is connected to the lower end of the screen plate by screws, and the sealing plate is used to seal the lower end of the screen plate.

[0008] Furthermore, the movable mechanism includes two spaced-apart sleeves, which are fixedly connected to the inside of the housing. A slidable movable rod is inserted into the sleeve, and the other end of the movable rod is fixedly connected to the sieve plate. A spring is fitted over the combination of the sleeve and the movable rod, and the two ends of the spring are fixedly connected to the housing and the sieve plate, respectively.

[0009] Furthermore, a shock-absorbing pad is fixedly connected to the bottom of the housing.

[0010] Furthermore, a protective cover is fixedly installed on the base, and the protective cover covers the servo motor and the eccentric block.

[0011] Furthermore, a pipeline is provided above the sieve plate, and branch pipes are connected to and fixedly installed on the pipeline. Multiple air inlets are provided at the bottom of each branch pipe. A vertical pipe is connected to and fixedly installed at the other end of the pipeline. Support seats are fixedly installed on both sides of the vertical pipe. The support seats are fixedly connected to the housing. A suction pump is fixedly installed at the top of the vertical pipe. The air inlet pipe of the suction pump is connected to the vertical pipe.

[0012] Furthermore, a filter plate is fixedly connected to the upper end of the inside of the vertical tube.

[0013] Furthermore, the lower end of the vertical pipe is open, and a sealing plug is internally threaded into the lower port of the vertical pipe.

[0014] Furthermore, a stepper motor is fixedly installed on the sealing plug, and the output shaft of the stepper motor extends into the vertical tube. The vertical tube is provided with a plurality of scraper strips arranged in a circumferential array. The scraper strips are fixedly connected to the output shaft of the stepper motor and located at the bottom of the filter plate.

[0015] This utility model has the following advantages:

[0016] By setting the screen plate at an angle, the material inside the screen plate will slide downwards under the influence of gravity. Multiple protrusions are designed to block the downward sliding material, preventing it from sliding directly to the bottom of the screen plate. These protrusions also extend the residence time of the material at the top of the screen plate. This extended residence time allows fine particles in the material to pass through the screen openings more thoroughly, thus improving screening efficiency and purity.

[0017] Air is drawn from the vertical pipe by a suction pump. Through the interconnection of pipes and branch pipes, a negative pressure airflow is created at the air inlet, drawing dust from near the screen plate into the inlet. The dust then enters the vertical pipe and is filtered by the filter plate, thus reducing dust generation during operation. After the device stops, dust below the filter plate settles on the sealing plug at the bottom of the vertical pipe. The inside of the vertical pipe can be cleaned by removing the sealing plug. A stepper motor drives a scraper to remove dust or other impurities adhering to the bottom of the filter plate, preventing clogging. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of an integrated dry pre-sorting and grading screening machine for iron ore provided in this utility model embodiment. Figure 1 .

[0019] Figure 2 A schematic diagram of the structure of an integrated dry pre-sorting and grading screening machine for iron ore provided in this utility model embodiment. Figure 2 .

[0020] Figure 3 An exploded view of the screen plate and branch pipes in an integrated dry pre-selection and grading screening machine for iron ore, provided for this utility model embodiment.

[0021] Figure 4 An enlarged sectional view of a portion of the structure of a branch pipe in an integrated dry pre-selection, grading, and screening machine for iron ore, provided in this utility model embodiment;

[0022] Figure 5 This utility model provides an integrated dry pre-sorting and screening machine for iron ore. Figure 4 Enlarged diagram of point A in the diagram.

[0023] In the diagram: 1. Shell; 2. Screen plate; 3. Screen hole; 4. Protrusion; 5. Base; 6. Servo motor; 7. Eccentric block; 8. Sleeve; 9. Movable rod; 10. Spring; 11. Protective cover; 12. Pipeline; 13. Branch pipe; 14. Air inlet; 15. Vertical pipe; 16. Support base; 17. Suction pump; 18. Filter plate; 19. Sealing plug; 20. Stepper motor; 21. Scraper; 22. Sealing plate. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Example 1

[0026] like Figures 1 to 5As shown, an integrated dry pre-sorting and grading screening machine for iron ore includes a housing 1 with an inclined bottom. A screen plate 2 is installed inside the housing 1, and the screen plate 2 is U-shaped. The screen holes 3 on the screen plate 2 are arranged in groups and each group is equidistant. A protrusion 4 is provided between adjacent groups of screen holes 3. The protrusion 4 is integrally formed with the screen plate 2. Movable mechanisms are provided on both sides inside the housing 1 and are connected to the screen plate 2. A base 5 is fixedly installed on the upper end of the screen plate 2. A servo motor 6 is fixedly installed on the base 5. An eccentric block 7 is fixedly installed on the output shaft end of the servo motor 6. A sealing plate 22 is connected to the lower end of the screen plate 2 by screws. The sealing plate 22 is used to seal the lower end of the screen plate 2.

[0027] The movable mechanism includes two spaced-apart sleeves 8, which are fixedly connected to the inside of the housing 1. A slidable movable rod 9 is inserted into the sleeve 8, and the other end of the movable rod 9 is fixedly connected to the sieve plate 2. A spring 10 is fitted over the combination of the sleeve 8 and the movable rod 9, and the two ends of the spring 10 are fixedly connected to the housing 1 and the sieve plate 2, respectively.

[0028] A shock-absorbing pad is fixedly connected to the bottom of the housing 1 to reduce the vibration generated during the operation of the device. A protective cover 11 is fixedly installed on the base 5. The protective cover 11 covers the servo motor 6 and the eccentric block 7. By setting the protective cover 11, the operator is separated from the eccentric block 7, which prevents the operator from accidentally touching the eccentric block 7 and improves the safety of the device during operation.

[0029] By feeding material into the upper port of the screen plate 2, the eccentric block 7 is rotated by the servo motor 6, causing the screen plate 2 to vibrate in the direction of the sleeve 8. The screen plate 2 can screen the material on it. Small particles pass through the screen holes 3 and fall into the shell 1, and are then guided to the lower end of the shell 1. Larger particles remain inside the screen plate 2. After screening, the sealing plate 22 is removed, and the large particles accumulated at the lower port of the screen plate 2 are taken out.

[0030] Because the sieve plate 2 is inclined, the material inside the sieve plate 2 will slide downwards under the action of gravity. By setting multiple protrusions 4, the downward sliding material is blocked, preventing the material from sliding directly to the lower end of the sieve plate 2. The multiple protrusions 4 can prolong the residence time of the material at the upper end of the sieve plate 2. By prolonging the residence time, the fine particles in the material can pass through the sieve holes 3 more fully, thereby improving the screening efficiency and screening purity.

[0031] Example 2

[0032] like Figures 2 to 5As shown, an integrated dry pre-sorting and grading screening machine for iron ore includes all the contents of Embodiment 1. In addition, a pipe 12 is provided above the screen plate 2, and equidistantly distributed branch pipes 13 are connected to and fixedly installed on the pipe 12. Multiple equidistantly distributed air inlets 14 are opened at the bottom of each branch pipe 13. A vertical pipe 15 is connected to and fixedly installed at the other end of the pipe 12. Support seats 16 are fixedly installed on both sides of the vertical pipe 15 and are fixedly connected to the housing 1. A suction pump 17 is fixedly installed at the top of the vertical pipe 15, and the air inlet pipe of the suction pump 17 is connected to the vertical pipe 15. A filter plate 18 is fixedly connected to the upper end of the vertical pipe 15. The lower end of the vertical pipe 15 is open, and a sealing plug 19 is threaded into the lower port of the vertical pipe 15. A stepper motor 20 is fixedly installed on the sealing plug 19. The output shaft of the stepper motor 20 extends into the vertical tube 15. The vertical tube 15 is provided with a plurality of scraper strips 21 arranged in a circular array. The scraper strips 21 are fixedly connected to the output shaft of the stepper motor 20 and located at the bottom of the filter plate 18.

[0033] During the screening process, the suction pump 17 is activated, drawing air from the vertical pipe 15. Through the connection of pipes 12 and branch pipes 13, a negative pressure airflow is generated at the air inlet 14, drawing dust from near the screen plate 2 into the air inlet 14. The dust then enters the vertical pipe 15 and is filtered by the filter plate 18, thus reducing the dust generated during operation. After the device stops, the dust below the filter plate 18 settles on the sealing plug 19 below the vertical pipe 15. By removing the sealing plug 19, the dust inside the vertical pipe 15 can be cleaned. The stepper motor 20 drives the scraper 21 to rotate, scraping away dust or other impurities adhering to the bottom of the filter plate 18, preventing clogging.

Claims

1. A dry pre-concentration classification integrated machine for iron ore, comprising a housing (1), characterized in that, The bottom of the housing (1) is inclined. A sieve plate (2) is provided inside the housing (1). The sieve plate (2) is U-shaped. The sieve holes (3) on the sieve plate (2) are arranged in groups and each group is equidistant. A protrusion (4) is provided between the sieve holes (3) of adjacent groups. The protrusion (4) is integrally formed with the sieve plate (2). Movable mechanisms are provided on both sides of the housing (1). The movable mechanisms are connected to the sieve plate (2). A base (5) is fixedly installed on the upper end of the sieve plate (2). A servo motor (6) is fixedly installed on the base (5). An eccentric block (7) is fixedly installed on the output shaft end of the servo motor (6). A sealing plate (22) is connected to the lower end of the sieve plate (2) by screws. The sealing plate (22) is used to seal the lower end of the sieve plate (2).

2. The iron ore dry pre-concentration classification integrated machine according to claim 1, characterized in that, The movable mechanism includes two spaced-apart sleeves (8), which are fixedly connected to the inside of the housing (1). A slidable movable rod (9) is inserted into the sleeve (8), and the other end of the movable rod (9) is fixedly connected to the sieve plate (2). A spring (10) is provided on the sleeve (8) and the movable rod (9), and the two ends of the spring (10) are fixedly connected to the housing (1) and the sieve plate (2) respectively.

3. The integrated machine for dry pre-concentration and classification of iron ore according to claim 1, characterized in that, The bottom of the housing (1) is fixedly connected with a shock-absorbing pad.

4. The integrated machine for dry pre-concentration and classification of iron ore according to claim 1, characterized in that, A protective cover (11) is fixedly installed on the base (5), and the protective cover (11) covers the servo motor (6) and the eccentric block (7).

5. The integrated machine for dry pre-concentration and classification of iron ore according to claim 1, characterized in that, A pipe (12) is provided above the sieve plate (2). A branch pipe (13) is connected to and fixedly installed on the pipe (12). A plurality of air inlets (14) are provided at the bottom of the branch pipe (13). A vertical pipe (15) is connected to and fixedly installed at the other end of the pipe (12). A support seat (16) is fixedly installed on both sides of the vertical pipe (15). The support seat (16) is fixedly connected to the housing (1). A suction pump (17) is fixedly installed on the top of the vertical pipe (15). The air inlet pipe of the suction pump (17) is connected to the vertical pipe (15).

6. The integrated machine for dry pre-concentration and classification of iron ore according to claim 5, characterized in that, A filter plate (18) is fixedly connected to the upper end of the inside of the vertical tube (15).

7. The integrated machine for dry pre-concentration and classification of iron ore according to claim 6, characterized in that, The lower end of the vertical tube (15) is open, and a sealing plug (19) is threaded into the lower port of the vertical tube (15).

8. The integrated machine for dry pre-concentration and classification of iron ore according to claim 7, characterized in that, A stepper motor (20) is fixedly installed on the sealing plug (19). The output shaft of the stepper motor (20) extends into the vertical tube (15). The vertical tube (15) is provided with a plurality of scraper strips (21) arranged in a circular array. The scraper strips (21) are fixedly connected to the output shaft of the stepper motor (20) and located at the bottom of the filter plate (18).

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