CN205904114U - A screening air separator for grit - Google Patents

Abstract

The utility model discloses a screening and winnowing machine for sand and gravel, which comprises a screening machine, a winnowing bin, a blower, an air inlet passage, and an exhaust passage. It is connected to the air inlet channel and the exhaust channel. There are multiple collecting hoppers in the lower part of the air selection silo; a rotating flap is installed in the lower part of the air selection silo. In the screening machine, the screen frame does not participate in vibration. The silo is directly rigidly connected, the screening machine adopts a hoisting structure, and its installation angle can be adjusted within the range of 35-40 degrees, and a side air inlet channel is set on the side wall of the winnowing silo. The utility model can simultaneously screen and classify materials to obtain products with different particle sizes, improve the efficiency of screening and classifying powder and optimize the gradation of machine-made sand.

Description

A kind of screening air separator for sand and gravel

technical field

The utility model relates to a screening air separator for sand and gravel. Sand and gravel include construction sand, tailings and other non-metallic minerals. The organic combination of screening machine and winnowing machine can achieve higher classification and powder selection efficiency, compact structure and small footprint. The utility model can screen and classify materials at the same time, improve the efficiency of screening and classifying powder and optimize the gradation of machine-made sand.

Background technique

Screening and winnowing equipment are important mechanical equipment in the dry sand making industry. The material with suitable particle size can be obtained by screening the crushed material, and the content of stone powder (referring to particles less than 0.075mm) in the machine-made sand can be reduced through air separation equipment, and products with different particle sizes can also be obtained. These two types of equipment are often Used alone, the process is complicated and the floor space is large. At present, wind screening and other equipment can also be used to screen and powder-select materials at the same time in the market, but the output is small, and the fineness modulus and powder content of the finished product are difficult to meet the required quality requirements.

In patent CN201410092116 and patent CN201310293148, the material enters from one end, and the material is classified only by wind force. Due to the limitation of wind force, the stone powder is blown from the beginning to the end, with high energy consumption and low efficiency. No vibration source and fixed sieve are used. The mesh screening machine screens the material first.

In the patent CN201120009666, the vibrating screen is used to screen light materials instead of materials with different particle sizes, and the screened products are not divided into several finished products with different specifications.

Utility model content

In order to improve the efficiency of screening and powder selection, reduce the volume of equipment, improve the gradation of machine-made sand and control the content of stone powder in machine-made sand, the utility model relates to a screening winnowing machine for sand and gravel. Organic combination, so as to achieve higher screening and powder selection efficiency, compact structure, small footprint. The utility model can screen and classify materials at the same time to obtain products with different particle sizes, improve the efficiency of screening and classifying powder and optimize the gradation of machine-made sand.

The utility model realizes material screening and winnowing in this way. A screening and winnowing machine for sand and gravel, including a screening machine, a winnowing bin, a blower, an air inlet channel, and an exhaust duct. The screening machine is installed on the upper part of the winnowing bin. The air outlet, the main air inlet is connected to the air inlet channel, the air inlet channel is connected to the blower, the other end of the air selection silo is provided with an air exhaust port, the air extraction port is connected to the air extraction channel, and multiple collecting hoppers are arranged at the lower part of the air selection silo; The lower part is equipped with a rotating flap.

More particularly, along the direction of wind flow, the rotating flap is installed between the first collecting hopper and the second collecting hopper.

Further preferably, the screening machine can be a traditional screening machine, such as a circular screen, a linear screen, etc., or a high-frequency screen. In the screening machine, the screen frame does not participate in vibration, and each screen module is installed independently, and is equipped with an independent vibration source. , The shear spring is used to connect the screen module and the screen frame. Since the screen frame of the screening machine does not participate in the vibration, and the screen module vibrates independently, the screen frame of the screening machine is directly and rigidly connected with the winnowing silo, without excessive flexibility, and the airtightness is better.

The independent vibration source equipped with the screen module in the screening machine can be a hydraulic brake motor or a vibration motor.

Further preferably, the screening machine is equipped with several screens with different apertures according to the flow direction, and according to the flow direction, the screens with three specifications of fine, medium and thick are respectively set, and the size of the particle size of the material falling into the lower hopper is controlled by the different apertures of the screens. Different, so that the gradation of the product under the sieve is better. The sieve aperture of the first section is set between 1.25-2mm, the sieve aperture of the second section is set between 2-3mm, and the sieve aperture of the third section is set between 3-4mm, and the drop is controlled by different sieve apertures. The particle size of the material entering the lower collecting bin is different.

Further preferably, the screening machine adopts a hoisting structure, and its installation angle can be adjusted in the range of 35-40 degrees, and its installation angle is close to the angle of repose of the material, so the material is easier to sieve and the sieving speed is faster when it is in contact with the screen. Faster, the processing capacity of the screening machine is larger.

Further preferably, the blower used for forced supplementary air in the wind separation silo adopts frequency conversion control, the frequency converter controls the speed of the blower, the speed of the blower controls the air volume, and the air volume controls the powder selection effect.

Further preferably, an air lock device is provided at the lower part of each collecting bin, and the air lock device is an impeller feeder or a gravity reversing valve.

Further preferably, a material distributor is provided at the feeding end of the screening machine, and the material distributor can evenly distribute the materials on the screening machine, which is beneficial to improve screening efficiency.

Further preferably, a side air inlet passage is installed on the side wall of the winnowing hopper, and the side air inlet opening of the side air inlet passage can adjust the size of the air inlet opening, so that the exhaust air volume is equal to the air intake, and the size of the side air inlet opening can be adjusted simultaneously. Control powder selection effect.

The beneficial effects of the utility model are as follows: 1. The materials are screened and broken up by the sieving machine. After the materials are classified and broken up, the stone powder is removed through the air selection bin, which has higher classification and powder selection efficiency. Compact, small footprint. 2. By adjusting the air volume of the blower, the content of stone powder in the material can be controlled. 3. By adjusting the angle of the rotating flap, the proportion of coarse material and medium material can be controlled, so as to obtain the machine-made sand with ideal gradation and powder content. 4. The screening machine adopts a vibrating net design. According to the nature of the material, the installation angle can be adjusted within the range of 35-40 degrees, which is beneficial to the screening of fine materials. The vibration quality is reduced compared with the traditional screening machine, and it is more energy-saving. 5. The screen frame does not participate in vibration, and the winnowing silo installed at the lower part can be rigidly connected with it, and the sealing performance is better. 6. By adjusting the opening of the side air volume, the air volume of the winnowing channel is controlled, so as to control the powder selection effect.

Description of drawings

Fig. 1 is a general structure diagram of the utility model.

Fig. 2 is the screen distribution and installation diagram of the sieve machine in the utility model, and the arrow points to the material running direction.

Fig. 3 is the front view of the screen module layout of the screening machine in the utility model;

Fig. 4 is a side view of the screen module layout of the screening machine in the utility model.

Fig. 5 is the front view of the side air inlet in the wind selection bin of the utility model;

Fig. 6 is a side view of the side air inlet in the air selection bin of the utility model.

Icon description: 1. Screening machine; 2. Air separation hopper; 3. Blower; 4. Air inlet channel; 5. Rotating flap; .Exhaust air channel; 10. Side air inlet channel, 11. Screen frame; 12. First section of screen; 13. Second section of screen; 14. Third section of screen; 15. Upper screen; 16. Material distribution Device; 17. Tension cable; 18. Beam; 19. Shear spring; 20. Vibration source; 21. Side air inlet; 22. Adjusting plate; 23. Limiting plate;

detailed description

Further illustrate the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of screening winnowing machine that is used for gravel, comprises screening machine 1, winnowing silo 2, blower 3, air inlet passage 4, exhaust passage 9, and screening machine 1 is installed on the winnowing material In the upper part of bin 2, the material is screened and dispersed by the screening machine 1 and then falls into the air selection bin 2. One end of the wind selection bin 2 is provided with a main air inlet, which is connected to the air inlet channel 4, and the air inlet channel 4 is connected to the blower 3. The other end of the winnowing bin 2 is provided with a draft outlet, which is connected to the draft passage 9, and a plurality of collecting hoppers are arranged at the lower part of the winnowing bin 2; a rotating flap 5 is installed at the lower part of the winnowing bin 2. Under the action of wind force, the stone powder in the material under the sieve is taken away by the wind, and the material that has been screened and air-selected falls into the corresponding collection hopper. Three collection hoppers are arranged at the lower part of the air selection silo 2, which are respectively arranged along the wind flow direction. Coarse collection hopper 6, medium collection hopper 7, fine collection hopper 8, the rotary flap 5 is set between the coarse collection hopper 6 and the medium collection hopper 7, by adjusting the angle of the rotary flap 5, the inside of the winnowing bin 2 can be adjusted The flow direction of the wind can control the ratio of materials falling into the two coarse collection hoppers 6 and the intermediate collection hopper 7, adjust the particle size of the materials in each collection hopper, and adjust the product gradation.

Based on the above ideas, the number of collecting hoppers can also be 2-5, and the rotating flap 5 can be selectively installed between adjacent collecting hoppers, so as to adjust the material particle size of each collecting hopper and adjust the product gradation. The lower part of each collecting hopper is equipped with an air lock device, and the air lock device is an impeller feeder or a gravity reversing valve.

Refer to Figure 2, Screening, 1 Configure several screens with different apertures according to the flow direction, set up fine, medium and coarse screens according to the flow direction, and control the material particles falling into the lower hopper according to the different apertures of the screens The difference in the size of the diameter makes the gradation of the under-screen product better. The aperture of the first stage screen cloth 12 is set between 1.25-2mm, the aperture diameter of the second stage screen cloth 13 is arranged between 2-3mm, and the aperture diameter of the third stage screen cloth 14 is arranged between 3-4mm, by the sieve The mesh diameter is different to control the particle size of the material falling into the lower collection bin. In order to improve the screening effect, the second stage screen 13 and the third stage screen 14 can be provided with two layers of screens, as shown in Figure 2, including an upper screen 15 and a lower screen. The first sieve 12, the second sieve 13, and the third sieve 14 are arranged step by step, the rear sieve takes over the sieve of the previous sieve, and the lower sieve takes over the sieve of the upper sieve 15 things.

Different materials have different fluidity and screenability. Based on this situation, the utility model provides a preferred embodiment. The screening machine 1 adopts a hoisting structure, and its installation angle can be adjusted within the range of 35-40 degrees. The installation angle is close to the angle of repose of the material, so the material is easier to sieve and the sieving speed is faster when it is in contact with the screen. Screening machine 1 has a larger processing capacity. As shown in Figure 2, the front end of the screening machine 1 is suspended on the support beam and constitutes a rotation point here, the rear end of the screening machine 1 is bound to the lower end of the tension cable 17, and the upper end of the tension cable 17 is hung by a hook In the hook of the support beam, by adjusting the length of the tension steel cable 17, the screening machine can be swung around the rotation point A, and the installation angle of the screening machine 1 can be adjusted arbitrarily within 35-40 degrees. Tension cable 17 can be replaced by connecting devices such as other ropes or connecting rods, as long as the lower end of the connecting device is connected with the rear end of the screening machine 1, the connection position of the upper end of the connecting device and the support beam can be adjusted, so it can also be adjusted screen angle.

In a more particular embodiment, the screening machine 1 can be a traditional screening machine, such as a round screen, a linear screen, etc., or a high-frequency screen. In the screening machine 1, the screen frame 11 does not participate in vibration, and each screen module is installed independently, and Equipped with an independent vibration source 20, the screen module and the screen frame are connected by a shear spring 19. As shown in Figures 3 and 4, the screen cloth is tensioned on three beams 18, the two ends of the beams 18 are connected to the screen frame 11 by shear springs 19, and the vibration source 20 is installed at the beams 18, due to the force of the shear springs 19 Vibration isolation effect, the screen frame 11 of the screening machine 1 does not participate in the vibration, and the screen module vibrates independently, so the screen frame 11 of the screening machine 1 is directly and rigidly connected with the winnowing bin 2, without excessive flexibility, and the airtightness is better. The independent vibration source 20 equipped with the screen module in the screening machine 1 may be a hydraulic brake motor or a vibration motor.

A more specific embodiment is that a material distributor 16 is provided at the feeding end of the screening machine 1, and the material distributor 16 can evenly distribute the materials on the screening machine 1, which is beneficial to improve screening efficiency.

More particular embodiment, with reference to Fig. 1, the side air inlet passage 10 is installed on the side wall of described winnowing bin 2, and the side air inlet opening of side air inlet passage 10 can adjust the size of the air inlet opening, so that the exhaust air volume is equal to the inlet air volume. At the same time, the powder selection effect can be controlled by adjusting the opening of the side air inlet. Referring to Fig. 5 and Fig. 6, a limiting plate 23 and an adjusting plate 22 are arranged in the side air inlet passage 10, and the adjusting plate 22 is provided with a U-shaped groove 24, and the U-shaped groove 24 of the adjusting plate 22 cooperates with the limiting plate 23 , adjusting the angle of the adjusting plate 22 can adjust the opening of the side air inlet, the side air inlet channel 10 is connected to the side air inlet 21, the reason why the size of the side air inlet 21 is not directly adjusted, but after the side wind enters the side air inlet channel 10 , and then adjust the opening of the side air inlet, because this adjustment can not only adjust the air intake volume, but also adjust the wind speed of the side air inlet.

In the utility model, the air blower 4 used for air selection silo 1 forced supplementary air is preferably controlled by frequency conversion, the frequency converter controls the speed of the blower, the speed of the blower controls the air volume, and the air volume controls the powder selection effect.

Claims (10)

1. A screening winnowing machine for sand and gravel, comprising a screening machine, a winnowing hopper, a blower, an air inlet channel, and an air extraction channel. The main air inlet, the main air inlet is connected to the air inlet channel, the air inlet channel is connected to the blower, the other end of the air selection silo is provided with an air exhaust port, and the air extraction port is connected to the air extraction channel. ; A rotary flap is installed at the lower part of the winnowing bin. 2. The screening winnowing machine for sand and gravel according to claim 1, characterized in that: in the screening machine, the screen frame does not participate in vibration, and each screen module is independently installed and equipped with an independent vibration source, The screen module and the screen frame are connected by shear springs. 3. The screening winnowing machine for sand and gravel according to claim 1, characterized in that: the screening machine adopts a hoisting structure, and its installation angle can be adjusted. 4. The screening winnowing machine for sand and gravel according to claim 3, characterized in that: the front end of the screening machine is suspended on the supporting beam and constitutes a rotation point here, and the height of the rear end of the screening machine is adjustable Suspended from support beams. 5. The screening wind separator for sand and gravel according to claim 3 or 4, characterized in that: the installation angle of the screening machine can be adjusted arbitrarily within 35-40 degrees. 6. The screening air separator for sand and gravel according to claim 1 or 2, characterized in that: the screen frame of the screening machine is directly rigidly connected with the air selection bin. 7. The screening wind separator for sand and gravel according to claim 1 or 2, characterized in that: a side air inlet channel is set on the side wall of the wind separation bin. 8 . The screening wind separator for sand and gravel according to claim 7 , wherein an adjusting plate for adjusting the opening of the air inlet is provided in the side air inlet channel. 9 . 9. The screening winnowing machine for sand and gravel according to claim 7, characterized in that: a limiting plate and an adjusting plate are arranged in the side air inlet channel, the adjusting plate is provided with a U-shaped groove, and the adjusting plate The U-shaped groove cooperates with the limiting plate, and the side air inlet channel is connected with the side air inlet. 10. The screening wind separator for sand and gravel according to claim 1, characterized in that: the screening machine is equipped with several types of screens with different apertures according to the flow direction, and three types of fine, medium and thick are respectively set according to the flow direction. specification mesh.