A new type of composite screening machine

Abstract

This utility model belongs to the field of screening machine technology and discloses a novel composite screening machine, including a base. At least two shock-absorbing seats are provided on both sides of the top of the base. A screen box is provided at the top of the shock-absorbing seats. Inside the screen box, a bar screen and a circular screen located below the bar screen are arranged sequentially from top to bottom. The circular screen is a circular vibrating screen structure. A feed inlet is provided at one end of the top of the screen box. This utility model integrates the bar screen and the circular screen in the same screen box, realizing integrated operation of pre-screening and fine screening. The bar screen can effectively remove large pieces of material, reduce the impact of material on the circular screen and the screening pressure, extend the service life of the composite screening machine, and reduce the floor space occupied by the composite screening machine, thus lowering the cost of material screening. Simultaneously, the spacing between the bars can be adjusted according to the particle size of the material through a spacing adjustment device to adapt to different working conditions and improve screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screening machine technology, and in particular to a novel composite screening machine. Background Technology

[0002] In industries such as mining, aggregate processing, and building materials, screening is a crucial step in material handling. For complex situations involving a wide particle size distribution, especially those containing large amounts of large materials (particle size greater than 150mm), the traditional approach typically employs a series combination of a bar feeder and a circular vibrating screen. The bar feeder, due to its adjustable bar spacing, impact resistance, and resistance to clogging, is placed at the forefront of the production line. It receives raw materials from the hopper and performs preliminary pre-screening, separating large particles far exceeding the acceptable particle size and guiding them to the crusher. The pre-screened material, with a relatively smaller particle size, is then conveyed to the subsequent circular vibrating screen for fine grading.

[0003] When the mining process becomes more complex and the feed particle size range is large, i.e., when the incoming material contains a large number of materials with a particle size greater than 150mm, the existing bar feeder is often used for pre-screening, and then the material is screened in a circular screen. This requires the independent installation of the bar feeder and the circular vibrating screen, as well as the conveying equipment connecting the two. This requires a lot of equipment, occupies a large area, and faces the problem of high maintenance costs. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides a new type of composite screening machine.

[0005] The technical solution adopted by this utility model is: a novel composite screening machine, including a base, at least two shock-absorbing seats on both sides of the top of the base, and a screen box on the top of the multiple shock-absorbing seats. The screen box has a bar screen and a circular screen located below the bar screen arranged sequentially from top to bottom. The circular screen is a circular vibrating screen structure. A feed inlet is provided at the top of one end of the screen box, and a first discharge outlet and a second discharge outlet are provided at the end of the screen box away from the feed inlet, located at the bar screen and the circular screen. The bar screen is composed of a number of parallel bars, and the screen box is provided with a spacing adjustment device for adjusting the spacing between the bars.

[0006] Preferably, the cross-section of the bar is trapezoidal or circular, and the bar is made of high manganese steel or wear-resistant alloy.

[0007] Preferably, the circular screen is configured with multiple layers, and the aperture of each layer of the circular screen decreases progressively.

[0008] Preferably, the composite screening machine further includes a vibration drive device installed at the bottom of the screen box for driving the bar screen and the circular screen to vibrate up and down.

[0009] Preferably, the vibration driving device is a vibrator or a vibration motor.

[0010] Preferably, the bar screen is inclined at 5°-15° to the horizontal plane.

[0011] The beneficial effects of this utility model are as follows: By integrating the bar screen and the circular screen into the same screen box, the pre-screening and fine screening operations are integrated. The bar screen can effectively remove large pieces of material, reduce the impact of material on the circular screen and the screening pressure, extend the service life of the composite screening machine, reduce the floor space of the composite screening machine, and lower the cost of material screening. At the same time, the spacing adjustment device can adjust the bar spacing according to the particle size of the material to adapt to different working conditions and improve screening efficiency. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0013] Figure 1 This is a cross-sectional view of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the bar screen and the spacing adjustment device of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Base; 2. Shock absorber; 3. Screen box; 4. Bar screen; 5. Circular screen; 6. Feed inlet; 7. First discharge outlet; 8. Second discharge outlet; 9. Bar; 10. Spacing adjustment device; 11. Vibration drive device. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0016] like Figure 1 and Figure 2As shown, this embodiment provides a novel composite screening machine, including a base 1. At least two shock-absorbing seats 2 are provided on both sides of the top of the base 1. A screen box 3 is provided at the top of the multiple shock-absorbing seats 2. Inside the screen box 3, a bar screen 4 and a circular screen 5 located below the bar screen 4 are arranged sequentially from top to bottom. The circular screen 5 is a circular vibrating screen structure. A feed inlet 6 is provided at the top of one end of the screen box 4. A first discharge outlet 7 and a second discharge outlet 8 are provided at the end of the screen box 4 away from the feed inlet 6, located at the bar screen 4 and the circular screen 5. The bar screen 4 is composed of several parallel bars 9, and the screen box 3 is provided with a spacing adjustment device 10 (spacing adjustment device 10) for adjusting the spacing between the bars 9. The feeder spacing adjustment device of the bar screen mechanism with variable spacing, as described in application number CN201721849034.3 (which belongs to the prior art and is known to those skilled in the art), integrates the bar screen 4 and the circular screen 5 in the same screen box 3, realizing the integrated operation of pre-screening and fine screening. The bar screen 4 can effectively remove large pieces of material, reduce the impact of material on the circular screen 5 and the screening pressure, extend the service life of the composite screen, reduce the floor space of the composite screen, and reduce the cost of material screening. At the same time, the spacing adjustment device 10 can adjust the spacing of the bars 9 according to the particle size of the material to adapt to different working conditions and improve screening efficiency.

[0017] The cross-section of the bar 9 is trapezoidal or circular, which facilitates the smooth passage of materials and reduces material jamming. The bar 9 is made of high manganese steel or wear-resistant alloy, which improves the wear resistance and impact resistance of the bar 9. It is suitable for processing high-hardness and large-piece materials and extends the service life of the composite screening machine.

[0018] The circular screen 5 is configured with multiple layers, and the aperture of each layer of the circular screen 5 decreases progressively, which can realize multi-level fine screening of materials, improve screening accuracy and efficiency, meet the grading requirements of products with different particle sizes, and is suitable for the processing of materials with complex particle size composition.

[0019] The composite screening machine also includes a vibration drive device 11 installed at the bottom of the screen box 3 to drive the bar screen 4 and the circular screen 5 to vibrate synchronously up and down. This synchronous vibration of the bar screen 4 and the circular screen 5 not only improves screening efficiency but also avoids damage caused by stress concentration due to asynchronous vibration, thus enhancing the stability and reliability of the equipment.

[0020] The vibration drive device 11 uses a vibrator or a vibration motor, which has a simple structure, large excitation force, and convenient maintenance. It can effectively drive the bar screen 4 and the circular screen 5 to perform efficient vibration screening and is suitable for high-intensity continuous operation environments.

[0021] The bar screen 4 is inclined at 5°-15° to the horizontal plane, which is conducive to the natural flow of materials under the action of gravity, thereby improving screening efficiency and processing capacity.

[0022] During operation, the material enters the screen box 3 through the feed inlet 6 and first falls onto the inclined bar screen 4. The bar screen 4 vibrates up and down by the excitation force generated by the vibration drive device 11. Large pieces of material are intercepted between several bars 9 and discharged from the first discharge port 7, achieving pre-screening. Smaller particles fall through the gaps between the bars 9 into the lower circular screen 5. The circular screen 5 has a multi-layer structure, with the mesh size of each layer decreasing progressively. Under the action of vibration, the material passes through each layer of screen in sequence, achieving multi-stage fine screening. Finally, materials of different particle sizes are discharged from the corresponding second discharge port 8.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0024] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A novel composite screening machine, comprising a base (1), wherein at least two shock-absorbing seats (2) are provided on both sides of the top of the base (1), characterized in that: The top of each of the multiple shock absorbers (2) is provided with a screen box (3). Inside the screen box (3) are arranged a bar screen (4) and a circular screen (5) located below the bar screen (4) in sequence from top to bottom. The circular screen (5) is a circular vibrating screen structure. One end of the screen box (3) is provided with a feed inlet (6). The end of the screen box (3) away from the feed inlet (6) is provided with a first discharge port (7) and a second discharge port (8) located at the bar screen (4) and the circular screen (5). The bar screen (4) is composed of several parallel bars (9), and the screen box (3) is provided with a spacing adjustment device (10) for adjusting the spacing between the several bars (9).

2. The novel composite screening machine according to claim 1, characterized in that: The cross-section of the bar (9) is set as trapezoidal or circular, and the material of the bar (9) is high manganese steel or wear-resistant alloy.

3. The novel composite screening machine according to claim 1, characterized in that: The circular screen (5) is configured as multiple layers, with the aperture of each layer of the circular screen (5) decreasing progressively.

4. The novel composite screening machine according to claim 1, characterized in that: The composite screening machine also includes a vibration drive device (11) installed at the bottom of the screen box (3) for driving the bar screen (4) and the circular screen (5) to vibrate synchronously up and down.

5. A novel composite screening machine according to claim 4, characterized in that: The vibration drive device (11) is an exciter or a vibration motor.

6. A novel composite screening machine according to claim 1, characterized in that: The bar screen (4) is inclined at 5°-15° to the horizontal plane.

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