Gravel sorting device and sorting method thereof

Abstract

The invention belongs to the technical field of gravel sorting, and particularly relates to a gravel sorting device and a sorting method.The gravel sorting device comprises a rack, a roller assembly, a driving assembly and a net cleaning assembly are arranged on the rack, the roller assembly comprises a framework and a filter net arranged outside the framework in a surrounding mode, and the roller assembly is obliquely arranged relative to the horizontal plane; the high side of the roller assembly is a feeding side, and the low side of the roller assembly is a stone discharging side. The driving assembly comprises a driving motor and a main shaft, the main shaft is connected with the output end of the driving motor and rotationally arranged on the rack, the main shaft penetrates through the framework and is fixedly connected with the framework, and the screen cleaning assembly is used for cleaning the filter screen from the outside. The filter screen is cleaned from the outside through the screen cleaning assembly, so that blockage of the filter screen can be reduced, the frequency of shutdown for replacing the filter screen is reduced, and the utilization rate and efficiency of equipment are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of sand and gravel sorting, and in particular relates to a sand and gravel sorting device and a sorting method thereof. Background Art

[0002] Sand and gravel are a kind of building materials commonly used in construction. Generally, construction workers need to screen the sand pile through a sand screening device to select sand and gravel of different coarse and fine particles and use the appropriate sand and gravel for construction.

[0003] With the development of building materials in my country, the scale of building aggregate production enterprises is getting bigger and bigger. The degree of modernization of sand and gravel processing will directly affect the production capacity, product quality, production cost, labor productivity and energy consumption of enterprises, and thus directly affect the benefits and development speed of enterprises. At present, sand and gravel will be separated after mining, and there are many types of sand and gravel sorting devices.

[0004] The linear vibrating screen uses the principle of vibration motor excitation to make the material jump linearly on the screen surface. The raw sand enters the feed port of the screening machine from the upper end of the vibrating screen, and produces several specifications of oversize and undersize through the multi-layer screen, which are discharged from their respective outlets to achieve waste screening. The linear vibrating screen commonly used in the market currently has problems such as high cost, high vibration force, high operating noise, and high requirements for infrastructure. During the operation of the vibrating screen, when the crossbeam breaks, the side plate cracks, the screen is damaged, etc., the most direct manifestation is generally the change of amplitude, frequency and noise. The vibrating screen generally works in a harsh environment with high noise around it.

[0005] The shaft circular screen is screened by rotating the drum screen. The drum is installed with an inclination. The middle of the drum structure is connected to the frame through the main shaft. Both ends of the main shaft are installed on the bearing seat and driven to rotate by the motor. The raw sand enters from the middle of the drum. Under the action of rotation and the screen, the primary finished sand is thrown out and the waste is discharged from the tail. The patent example of the shaft circular screen can be found in the Chinese patent document CN212189955U, a drum sand screening machine, etc.

[0006] At present, it is rather troublesome to replace the screen of a drum-type sand screening machine. Therefore, if the blockage of the screen can be reduced or there is a device to clear the blockage of the screen, the convenience and efficiency of the use of the drum-type sand screening machine can be improved. Summary of the invention

[0007] The purpose of the present invention is to provide a sand and gravel sorting device and a sorting method thereof in view of the above-mentioned technical problems, so as to achieve the effect of ensuring the utilization rate and efficiency of the equipment.

[0008] In view of this, the present invention provides a sand and gravel sorting device, comprising a frame, on which are arranged:

[0009] A drum assembly, the drum assembly includes a frame and a filter screen arranged outside the frame, the drum assembly is arranged obliquely relative to a horizontal plane, the high side of the drum assembly is a feeding side, and the low side is a stone discharging side;

[0010] The driving assembly includes a driving motor and a main shaft, the main shaft is connected to the output end of the driving motor and is rotatably arranged on the frame, and the main shaft passes through the frame and is fixedly connected to the frame.

[0011] A screen cleaning component is used to clean the filter screen from the outside.

[0012] In this technical solution, cleaning the filter from the outside through the filter cleaning component can reduce filter blockage, reduce the number of shutdowns for filter replacement, and ensure equipment utilization and efficiency.

[0013] Furthermore, the net cleaning component comprises:

[0014] A screen cleaning wire rod, the screen cleaning wire rod is rotatably arranged on a frame outside the roller assembly in parallel with the roller assembly;

[0015] A screen-clearing slider, which is slidably arranged on a frame outside the drum assembly along the length direction of the drum assembly, and the screen-clearing slider is spirally connected to the screen-clearing screw rod;

[0016] A screen cleaning brush, one side of which is connected to the screen cleaning slider and the other side of which is in contact with the filter screen;

[0017] A net-clearing motor is fixedly arranged on the frame, and an output end of the net-clearing motor is connected to the net-clearing screw rod.

[0018] In this technical solution, when the screen needs to be cleaned, the screen cleaning motor is started to rotate the screen cleaning screw rod, driving the screen cleaning slider and the screen cleaning brush to move along the length direction of the roller assembly, so that the screen cleaning brush cleans the filter screen.

[0019] Furthermore, screen cleaning brushes are provided on both sides of the drum assembly, and synchronous movement is performed using a synchronous belt and a synchronous wheel.

[0020] Furthermore, a feed hopper is provided on the feed side of the drum assembly, and a discharge port of the feed hopper extends into the interior of the drum assembly.

[0021] In this technical solution, sand and gravel directly enter the drum assembly when discharged from the discharge port of the feed hopper, which can reduce dust.

[0022] Furthermore, a sand discharge hopper and a stone discharge hopper are fixedly arranged on the frame below the drum assembly.

[0023] Furthermore, two limit blocks are arranged on the frame at both ends of the screen cleaning screw rod, and a commutation sensor is arranged on the limit block, and the signal of the commutation sensor is used to control the forward and reverse rotation of the motor.

[0024] In the technical solution, the reciprocating movement and cleaning of the screen cleaning brush is achieved by controlling the forward and reverse rotation of the motor.

[0025] Furthermore, the frame includes four leg columns, and the two leg columns located on the feed side of the roller assembly are longer than the two leg columns on the discharge side of the roller assembly.

[0026] Furthermore, the frame is provided with an inclination adjustment structure for adjusting the inclination angle of the roller assembly, and the inclination adjustment structure adjusts the inclination angle of the roller assembly by adjusting the length of the leg column.

[0027] In the present technical solution, when the inclination angle of the drum assembly is too large, there will be a problem of insufficient screening due to too short screening time, causing part of the sand and stones to be discharged from the stone hopper together, resulting in waste. When the inclination angle of the drum assembly is too small, the screening time will be increased. Therefore, the inclination angle is adjusted according to the proportion of sand and gravel in the incoming sand and gravel mixture. When the sand proportion is large, the inclination angle of the drum assembly is reduced, and when the stone proportion is large, the inclination angle of the drum assembly is increased. This can ensure both screening efficiency and screening quality.

[0028] Further, the inclination adjustment structure is arranged on the leg column on the discharge side of the roller assembly, the leg column includes an outer rod and an inner rod, the inner rod is slidably arranged in the outer rod, and the lower end of the outer rod is in contact with the ground. The inclination adjustment structure includes:

[0029] An adjusting motor, wherein the adjusting motor is fixedly arranged on the outer rod, an output shaft of the adjusting motor is perpendicular to the axis of the outer rod and extends into the outer rod, and an adjusting gear is fixedly connected to the output shaft;

[0030] The adjusting rack is fixedly arranged in the inner rod and extends out of the inner rod from below, and the adjusting rack is meshed with the adjusting gear.

[0031] In this technical solution, when the inclination angle needs to be adjusted, the adjustment motor is started to rotate the adjustment gear, so that the adjustment rack moves the inner rod up and down inside the outer rod, thereby changing the overall length of the leg column on the discharge side of the roller assembly, thereby changing the inclination angle of the roller assembly.

[0032] Furthermore, the sorting method of the sand and gravel sorting device comprises the following steps:

[0033] S1: adjusting the inclination angle of the roller assembly: starting the adjusting motor to rotate the adjusting gear, so that the adjusting rack moves the inner rod up and down inside the outer rod, so that the overall length of the leg column on the discharge side of the roller assembly changes, thereby changing the inclination angle of the roller assembly;

[0034] S2: feeding, feeding the sand and gravel mixture into the drum assembly from the feed hopper on the feeding side of the drum assembly;

[0035] S3: Screening, start the drive motor to make the main shaft rotate with the drum assembly in the circumferential direction for screening, the sand falls into the sand discharge hopper through the filter screen, and the stones are discharged from the stone discharge hopper on the discharge side of the drum assembly. When the continuous screening reaches the preset time, start the screen cleaning motor to rotate the screen cleaning screw rod, drive the screen cleaning slider and the screen cleaning brush to move along the length direction of the drum assembly, so that the screen cleaning brush cleans the filter screen.

[0036] The beneficial effects of the present invention are:

[0037] 1. Cleaning the filter from the outside through the filter cleaning component can reduce filter blockage, reduce the number of downtime to replace the filter, and ensure equipment utilization and efficiency.

[0038] 2. When sand and gravel are discharged from the outlet of the feed hopper, they directly enter the drum assembly, which can reduce dust.

[0039] 3. When the inclination angle of the drum assembly is too large, the screening time will be too short, resulting in insufficient screening, causing part of the sand and stone to be discharged from the stone hopper together, resulting in waste. When the inclination angle of the drum assembly is too small, the screening time will be increased. Therefore, the inclination angle is adjusted according to the proportion of sand and gravel in the incoming sand and gravel mixture. When the proportion of sand is large, the inclination angle of the drum assembly is reduced. When the proportion of stone is large, the inclination angle of the drum assembly is increased. This can ensure both screening efficiency and screening quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a stereogram of the present invention;

[0041] Figure 2 It is a stereogram of another viewing angle of the present invention;

[0042] Figure 3 is a cross-sectional view of the present invention;

[0043] Figure 4 It is a schematic diagram of the tilt adjustment structure.

[0044] The symbols in the figure are:

[0045] 1. Frame; 2. Roller assembly; 3. Frame; 4. Filter; 5. Feed side; 6. Discharge side; 7. Drive motor; 8. Spindle; 9. Screen cleaning screw rod; 10. Screen cleaning slider; 11. Screen cleaning brush; 12. Screen cleaning motor; 13. Synchronous belt; 14. Synchronous wheel; 15. Feed hopper; 16. Sand discharge hopper; 17. Stone discharge hopper; 18. Limit block; 19. Leg column; 20. Outer rod; 21. Inner rod; 22. Adjustment motor; 23. Adjustment gear; 24. Adjustment rack. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0047] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0049] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0050] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0051] Embodiment 1

[0052] like Figure 1-3 As shown, a sand and stone sorting device includes a frame 1, on which are arranged:

[0053] A drum assembly 2, wherein the drum assembly 2 comprises a frame 3 and a filter screen 4 arranged outside the frame 3, the drum assembly 2 is arranged obliquely relative to a horizontal plane, the high side of the drum assembly 2 is a feeding side 5, and the low side is a stone discharging side 6;

[0054] The driving assembly includes a driving motor 7 and a main shaft 8. The main shaft 8 is connected to the output end of the driving motor 7 and is rotatably arranged on the frame 1. The main shaft 8 passes through the frame 3 and is fixedly connected to the frame 3.

[0055] The screen cleaning component is used to clean the filter screen 4 from the outside.

[0056] In the present technical solution, cleaning the filter 4 from the outside by means of a filter cleaning assembly can reduce the blockage of the filter 4, reduce the number of shutdowns for replacing the filter 4, and ensure the utilization rate and efficiency of the equipment.

[0057] The net cleaning component comprises:

[0058] A screen cleaning wire rod 9, wherein the screen cleaning wire rod 9 is rotatably arranged on the frame 1 outside the roller assembly 2 in parallel with the roller assembly 2;

[0059] A screen-clearing slider 10, wherein the screen-clearing slider 10 is slidably disposed on the frame 1 outside the drum assembly 2 along the length direction of the drum assembly 2, and the screen-clearing slider 10 is spirally connected to the screen-clearing screw rod 9;

[0060] A screen cleaning brush 11, one side of which is connected to the screen cleaning slider 10, and the other side of which is in contact with the filter screen 4;

[0061] The net-clearing motor 12 is fixedly arranged on the frame 1 , and the output end of the net-clearing motor 12 is connected to the net-clearing screw rod 9 .

[0062] In this technical solution, when the screen needs to be cleaned, the screen cleaning motor 12 is started to rotate the screen cleaning screw rod 9, driving the screen cleaning slider 10 and the screen cleaning brush 11 to move along the length direction of the drum assembly 2, so that the screen cleaning brush 11 cleans the filter screen 4.

[0063] The roller assembly 2 is provided with screen cleaning brushes 11 on both sides, and uses a synchronous belt 13 and a synchronous wheel 14 to perform synchronous movement.

[0064] A feed hopper 15 is provided on the feed side 5 of the drum assembly 2 , and an outlet of the feed hopper 15 extends into the interior of the drum assembly 2 .

[0065] In the present technical solution, the sand and gravel are directly discharged from the discharge port of the feed hopper 15 into the drum assembly 2, which can reduce dust.

[0066] A sand discharge hopper 16 and a stone discharge hopper 17 are fixedly arranged on the frame 1 below the drum assembly 2 .

[0067] The frame 1 is provided with two limit blocks 18 at both ends of the screen cleaning screw rod 9, and the limit blocks 18 are provided with a reversing sensor, and the signal of the reversing sensor is used to control the forward and reverse rotation of the motor.

[0068] In the present technical solution, the reciprocating cleaning of the screen cleaning brush 11 is achieved by controlling the forward and reverse rotation of the motor.

[0069] Embodiment 2

[0070] like Figure 1-4 As shown, the frame 1 includes four legs 19 , and the two legs 19 located on the feed side 5 of the drum assembly 2 are longer than the two legs 19 on the discharge side 6 of the drum assembly 2 .

[0071] The frame 1 is provided with an inclination adjustment structure for adjusting the inclination angle of the drum assembly 2 . The inclination adjustment structure adjusts the inclination angle of the drum assembly 2 by adjusting the length of the leg column 19 .

[0072] In the present technical solution, when the inclination angle of the drum assembly 2 is too large, there will be a problem of insufficient screening due to too short screening time, so that part of the sand and stones are discharged from the stone discharge hopper 17 together, causing waste. When the inclination angle of the drum assembly 2 is too small, the screening time will be increased. Therefore, the inclination angle is adjusted according to the proportion of sand and gravel in the incoming sand and gravel mixture. When the sand proportion is large, the inclination angle of the drum assembly 2 is reduced, and when the stone proportion is large, the inclination angle of the drum assembly 2 is increased, which can ensure both screening efficiency and screening quality.

[0073] The inclination adjustment structure is arranged on the leg column 19 of the discharge side 6 of the drum assembly 2, and the leg column 19 includes an outer rod 20 and an inner rod 21, and the inner rod 21 is slidably arranged in the outer rod 20, and the lower end of the outer rod 20 is in contact with the ground. The inclination adjustment structure includes:

[0074] An adjusting motor 22, wherein the adjusting motor 22 is fixedly disposed on the outer rod 20, an output shaft of the adjusting motor 22 is perpendicular to the axis of the outer rod 20 and extends into the outer rod 20, and an adjusting gear 23 is fixedly connected to the output shaft;

[0075] The adjusting rack 24 is fixedly disposed in the inner rod 21 and extends out of the inner rod 21 from below. The adjusting rack 24 is meshed with the adjusting gear 23 .

[0076] In the present technical solution, when the tilt angle needs to be adjusted, the adjustment motor 22 is started to rotate the adjustment gear 23, so that the adjustment rack 24 moves the inner rod 21 up and down in the outer rod 20, thereby changing the overall length of the leg column 19 on the discharge side 6 of the roller assembly 2, thereby changing the tilt angle of the roller assembly 2.

[0077] The sorting method of the sand and gravel sorting device comprises the following steps:

[0078] S1: adjusting the inclination angle of the roller assembly 2: starting the adjusting motor 22 to rotate the adjusting gear 23, so that the adjusting rack 24 moves the inner rod 21 up and down in the outer rod 20, so that the overall length of the leg column 19 on the discharge side 6 of the roller assembly 2 changes, thereby changing the inclination angle of the roller assembly 2;

[0079] S2: feeding, feeding the sand and gravel mixture into the drum assembly 2 from the feed hopper 15 on the feed side 5 of the drum assembly 2;

[0080] S3: Screening, start the driving motor 7 to make the main shaft 8 rotate with the drum assembly 2 in the circumferential direction for screening, the sand falls into the sand discharge hopper 16 from the filter screen 4, and the stones are discharged from the stone discharge hopper 17 on the discharge side 6 of the drum assembly 2. When the continuous screening reaches the preset time, start the screen cleaning motor 12 to rotate the screen cleaning screw rod 9, drive the screen cleaning slider 10 and the screen cleaning brush 11 to move along the length direction of the drum assembly 2, so that the screen cleaning brush 11 cleans the filter screen 4.

[0081] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A sand and gravel sorting device, characterized in that , comprising a frame (1), on which is disposed: A drum assembly (2), the drum assembly (2) comprising a frame (3) and a filter screen (4) arranged outside the frame (3), the drum assembly (2) being arranged obliquely relative to a horizontal plane, the high side of the drum assembly (2) being a feeding side (5), and the low side being a stone discharging side (6); A drive assembly, the drive assembly comprising a drive motor (7) and a main shaft (8), the main shaft (8) being connected to an output end of the drive motor (7) and being rotatably arranged on the frame (1), and the main shaft (8) passing through the frame (3) and being fixedly connected to the frame (3); A screen cleaning component is used to clean the filter screen (4) from the outside.

2. A sand and gravel sorting device according to claim 1, characterized in that: The net cleaning component comprises: A screen-clearing wire rod (9), the screen-clearing wire rod (9) being rotatably arranged on a frame (1) outside the roller assembly (2) in parallel with the roller assembly (2); A screen-cleaning slider (10), wherein the screen-cleaning slider (10) is slidably arranged on a frame (1) outside the roller assembly (2) along the length direction of the roller assembly (2), and the screen-cleaning slider (10) is spirally connected to the screen-cleaning screw rod (9); A screen cleaning brush (11), one side of the screen cleaning brush (11) is connected to the screen cleaning slider (10), and the other side of the screen cleaning brush (11) is in contact with the filter screen (4); A net-clearing motor (12) is fixedly arranged on the frame (1), and an output end of the net-clearing motor (12) is connected to the net-clearing screw rod (9).

3. A sand and gravel sorting device according to claim 2, characterized in that: The roller assembly (2) is provided with screen cleaning brushes (11) on both sides, and synchronous movement is performed by using a synchronous belt (13) and a synchronous wheel (14).

4. A sand and gravel sorting device according to claim 1, characterized in that: A feed hopper (15) is provided on the feed side (5) of the drum assembly (2), and an outlet of the feed hopper (15) extends into the interior of the drum assembly (2).

5. A sand and gravel sorting device according to claim 1, characterized in that: A sand discharge hopper (16) and a stone discharge hopper (17) are fixedly arranged on the frame (1) below the drum assembly (2).

6. A sand and gravel sorting device according to claim 2, characterized in that: Two limit blocks (18) are arranged on the frame (1) at both ends of the screen cleaning screw rod (9), and a commutation sensor is arranged on the limit block (18). The signal of the commutation sensor is used to control the forward and reverse rotation of the motor.

7. A sand and gravel sorting device according to claim 1, characterized in that: The frame (1) comprises four leg columns (19), and the two leg columns (19) located on the feeding side (5) of the roller assembly (2) are longer than the two leg columns (19) located on the discharging side (6) of the roller assembly (2).

8. A sand and gravel sorting device according to claim 7, characterized in that: The frame (1) is provided with an inclination adjustment structure for adjusting the inclination angle of the roller assembly (2), and the inclination adjustment structure adjusts the inclination angle of the roller assembly (2) by adjusting the length of the leg column (19).

9. A sand and gravel sorting device according to claim 8, characterized in that: The inclination adjustment structure is arranged on a leg column (19) on the discharge side (6) of the roller assembly (2), the leg column (19) comprises an outer rod (20) and an inner rod (21), the inner rod (21) is slidably arranged in the outer rod (20), the lower end of the outer rod (20) is in contact with the ground, and the inclination adjustment structure comprises: an adjusting motor (22), the adjusting motor (22) being fixedly arranged on the outer rod (20), the output shaft of the adjusting motor (22) being perpendicular to the axis of the outer rod (20) and extending into the outer rod (20), and the output shaft being fixedly connected to an adjusting gear (23); An adjusting rack (24) is fixedly disposed in the inner rod (21) and extends out of the inner rod (21) from below, and the adjusting rack (24) is meshed with the adjusting gear (23).

10. A sand and gravel sorting device according to claim 9, characterized in that: The sorting method of the sand and gravel sorting device comprises the following steps: S1: adjusting the inclination angle of the roller assembly (2): starting the adjustment motor (22) to rotate the adjustment gear (23), thereby causing the adjustment rack (24) to move up and down with the inner rod (21) inside the outer rod (20), thereby changing the overall length of the leg column (19) on the discharge side (6) of the roller assembly (2), thereby changing the inclination angle of the roller assembly (2); S2: feeding, feeding the sand and gravel mixture into the drum assembly (2) from the feed hopper (15) on the feed side (5) of the drum assembly (2); S3: Screening, the driving motor (7) is started to make the main shaft (8) rotate with the drum assembly (2) in the circumferential direction to perform screening, the sand falls into the sand discharge hopper (16) from the filter screen (4), and the stones are discharged from the stone discharge hopper (17) on the discharge side (6) of the drum assembly (2). When the continuous screening reaches a preset time, the net cleaning motor (12) is started to make the net cleaning screw rod (9) rotate, driving the net cleaning slider (10) and the net cleaning brush (11) to move along the length direction of the drum assembly (2), so that the net cleaning brush (11) cleans the filter screen (4).

Images