Sand screening machine for construction engineering

Abstract

The application discloses a sand screening machine for construction engineering and belongs to the field of sand screening machines. The sand screening machine comprises a support, a feeding hopper fixedly arranged on the support, a conveyor obliquely arranged on the support and located on the lower side of the feeding hopper, a sand screening cylinder rotatably arranged on the support, a discharging frame fixedly arranged on the lower end of the support and a material guiding baffle movably arranged on the discharging frame. The sand screening cylinder comprises coaxially arranged first and second screening cylinders, the side walls of the first and second screening cylinders are both provided with arranged and distributed screen holes, and the screen holes on the second screening cylinder are smaller than the screen holes on the first screening cylinder. The sand screening machine has the beneficial effect that when sand material is put into the second screening cylinder, smaller sand material can be obtained, and when sand material is put into the first screening cylinder, larger sand material can be obtained.

Description

Technical Field

[0001] This application relates to the field of sand screening machines, and more specifically, to a sand screening machine for construction engineering. Background Technology

[0002] In the field of construction engineering, sand plays an irreplaceable role as an indispensable raw material for concrete. In order to control the quality of concrete, sand needs to be screened to ensure that the particle size of the sand is within the standard range. Currently, sand screening requires specialized sand screening equipment. Traditional sand screening equipment involves manually shoveling sand and throwing it onto a screen, and then screening out unqualified stones or impurities under the action of the sand's own gravity. However, this method is relatively slow and has a heavy workload for workers. Now, drum sand screening machines are mainly used for sand screening. However, drum sand screening machines usually use a screen cylinder to screen sand, but the screen cylinder cannot control the coarseness of the sand being screened, making it inconvenient to use.

[0003] Therefore, a sand screening machine for construction projects is needed to solve the above problems. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a sand screening machine for construction engineering, comprising: a support frame with a feed hopper fixedly mounted on it; a conveyor installed at an incline on the support frame, located below the feed hopper; a sand screening cylinder rotatably mounted on the support frame, the sand screening cylinder being inclined with one end higher than the other; a discharge frame fixedly mounted at the lower end of the support frame, through which sand in the feed hopper is discharged; and a guide baffle movably mounted on the discharge frame, through which sand discharged from the discharge frame falls onto the guide baffle and slides into the sand screening cylinder; wherein, the sand screening cylinder includes a first screen cylinder and a second screen cylinder coaxially arranged, the first screen cylinder being sleeved outside the second screen cylinder, both the first and second screen cylinders being open at both ends, and both the first and second screen cylinders having screen holes arranged in a specific pattern on their sidewalls, the screen holes on the second screen cylinder being smaller than those on the first screen cylinder.

[0006] The sand screening cylinder, when rotated, screens the sand within. The screened sand falls onto a conveyor for transport. The system uses a first and a second screening cylinder. When sand is fed into the second screening cylinder, the smaller screen openings result in smaller sand particles; conversely, when sand is fed into the first screening cylinder, the larger screen openings result in larger sand particles.

[0007] Furthermore, the higher ends of the first and second screen cylinders are located below the feed hopper, the lower end of the second screen cylinder is flush with the lower end of the first screen cylinder, and the higher end of the second screen cylinder is lower than the higher end of the first screen cylinder, so that the higher end of the second screen cylinder is located inside the first screen cylinder. The guide baffle is also inclined, with the higher end of the guide baffle hinged to the discharge frame and the lower end of the guide baffle facing the first and second screen cylinders, so that the sand slides down the guide baffle into the sand screening cylinder.

[0008] Because the higher end of the second screen cylinder is lower than the higher end of the first screen cylinder, when the guide baffle is located at one end of the first screen cylinder and close to the inner wall of the first screen cylinder, the sand enters the first screen cylinder but does not enter the second screen cylinder.

[0009] Furthermore, a motor is fixedly installed on the bracket, and a drive shaft passing through the first screen cylinder and the second screen cylinder is fixedly connected to the power output end of the motor. A fixing rod is provided between the drive shaft and the first screen cylinder and the second screen cylinder, and the fixing rod is used to fix the drive shaft in place.

[0010] The motor and drive shaft can drive the first and second screen cylinders to rotate synchronously for sand screening.

[0011] Furthermore, the guide baffle includes: an installation part and a telescopic part. One end of the installation part is hinged to the discharge frame, so that the installation part is deflected relative to the discharge frame to adjust the tilt angle. The telescopic part is slidably engaged with the installation part. The telescopic part is located at the lower end near the installation part. The telescopic part slides out of the installation part to adjust the overall length of the guide baffle.

[0012] The installation and telescopic parts are designed so that the overall length of the guide baffle can be adjusted by sliding the telescopic part on the installation part. The installation part deflects relative to the discharge frame, so that the guide baffle has two states. In the first state, one end of the telescopic part extends into the first screen cylinder and is located outside the second screen cylinder. At this time, the sand falls into the first screen cylinder and does not fall into the second screen cylinder. The sand can be dried through the first screen cylinder to obtain coarser sand. In the second state, one end of the telescopic part extends into the second screen cylinder. At this time, the sand is screened through the second screen cylinder to obtain finer sand.

[0013] Furthermore, the mounting part has side plates on both sides, and sliding grooves extending along the mounting part are opened on the side plates. A positioning bolt is threaded on the telescopic part. The positioning bolt passes through the sliding groove. The projection size of the nut part of the positioning bolt on the side plate is larger than the width of the sliding groove. The side plate is rotated so that the nut part of the side plate abuts against the edge of the sliding groove.

[0014] The positioning bolts are positioned so that the bolt nuts abut against the edge of the sliding groove, thus limiting the movement of the expansion joint.

[0015] Furthermore, a limiting rod is hinged to the side plate near the higher end. One end of the limiting rod is hinged to the side plate, and the other end is equipped with a positioning screw. Multiple vertically arranged positioning holes are opened on the discharge frame. One end of the positioning screw is embedded in the positioning hole to limit the installation part.

[0016] Furthermore, a discharge plate is provided on the lower side of the lower end of the sand screening cylinder, and the discharge plate is fixed on the support.

[0017] The discharge plate is designed to receive and discharge the stones and other impurities screened out by the first and second screen cylinders.

[0018] The beneficial effects of this application are as follows: 1. The sand screening cylinder, when rotated, screens the sand inside. The screened sand falls onto a conveyor for transport. With the first and second screening cylinders, when sand is fed into the second screening cylinder, the smaller screen openings result in smaller sand particles; conversely, when sand is fed into the first screening cylinder, the larger screen openings result in larger sand particles.

[0019] 2. Through the installation part and the telescopic part, the overall length of the guide baffle can be adjusted by sliding the telescopic part on the installation part, so that the guide baffle has two states. In the first state, one end of the telescopic part extends into the first screen cylinder and is located outside the second screen cylinder. At this time, the sand falls into the first screen cylinder and does not fall into the second screen cylinder, so that the sand can be dried through the first screen cylinder to obtain coarser sand. In the second state, one end of the telescopic part extends into the second screen cylinder. At this time, the sand is screened through the second screen cylinder to obtain finer sand.

[0020] 3. The discharge plate is set up to receive and discharge the stones and other impurities screened out by the first and second screen cylinders. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0022] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0023] In the attached diagram: Figure 1 This is an overall schematic diagram according to one embodiment of the present application; Figure 2 yes Figure 1 A schematic diagram of the installation structure of the first sieve cylinder and the second sieve cylinder in the embodiment; Figure 3 yes Figure 1 A schematic diagram of the feeding state inside the second screen cylinder in the embodiment; Figure 4 yes Figure 1 A schematic diagram of the material guide baffle in the embodiment.

[0024] Figure label: 10. Support frame; 11. Feed hopper; 12. Discharge frame; 13. Sand screening cylinder; 14. Motor; 15. Drive shaft; 16. Discharge plate; 17. Conveyor; 18. First screen cylinder; 19. Second screen cylinder; 20. Fixing rod; 21. Guide baffle; 22. Mounting part; 23. Telescopic part; 24. Sliding groove; 25. Positioning bolt; 26. Limiting rod; 27. Positioning screw; 28. Positioning hole; 29. ​​Side plate. Detailed Implementation

[0025] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0026] It should also be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0027] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0028] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0029] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Reference Figure 1-4 A sand screening machine for construction engineering includes: a support frame 10, a feed hopper 11, a conveyor 17, a screening cylinder 13, a discharge frame 12, and a guide baffle 21. The feed hopper 11 is fixedly mounted on the support frame 10, and the sand to be screened is placed inside the feed hopper 11. The conveyor 17 is inclinedly mounted on the support frame 10, located below the feed hopper 11. The conveyor 17 is a belt conveyor, a common type of conveyor, used to transport the screened sand. A motor 14 is fixedly mounted on the support frame 10, and the power output end of the motor 14 is fixedly connected to a drive shaft 15. Support bearings are mounted on the support frame 10 at both ends of the drive shaft 15, and the inner rings of the support bearings are fitted onto the drive shaft 15. The sand screening cylinder 13 includes a first screening cylinder 18 and a second screening cylinder 19 coaxially arranged. Both the first screening cylinder 18 and the second screening cylinder 19 are inclined with one end higher than the other. The first screening cylinder 18 is sleeved on the outside of the second screening cylinder 19. Both the first screening cylinder 18 and the second screening cylinder 19 are open at both ends. The side walls of both the first screening cylinder 18 and the second screening cylinder 19 are provided with screen holes arranged in a specific pattern. The screen holes on the second screening cylinder 19 are smaller than the screen holes on the first screening cylinder 18. Multiple sets of fixing rods 20 are fixedly installed on the drive shaft 15. The fixing rods 20 are welded and fixed to the first screening cylinder 18 and the second screening cylinder 19, so that when the drive shaft 15 rotates, it drives the first screening cylinder 18 and the second screening cylinder 19 to rotate synchronously.

[0031] A discharge frame 12 is fixedly installed at the lower end of the feed hopper 11. A guide baffle 21 is hinged to the discharge frame 12. The guide baffle 21 is inclined and includes a mounting part 22 and a telescopic part 23. One end of the mounting part 22 is hinged to the discharge frame 12, so that the mounting part 22 is deflected relative to the discharge frame 12 to adjust the tilt angle. The telescopic part 23 is slidably engaged with the mounting part 22. The telescopic part 23 is located at the lower end near the mounting part 22. The telescopic part 23 slides out of the mounting part 22 to adjust the overall length of the guide baffle 21.

[0032] The higher ends of the first screen cylinder 18 and the second screen cylinder 19 are located below the feed hopper 11. The lower end of the second screen cylinder 19 is flush with the lower end of the first screen cylinder 18. The higher end of the second screen cylinder 19 is lower than the higher end of the first screen cylinder 18, so that the higher end of the second screen cylinder 19 is located inside the first screen cylinder 18. The guide baffle 21 is also inclined. The higher end of the guide baffle 21 is hinged to the discharge frame 12, and the lower end of the guide baffle 21 faces the first screen cylinder 18 and the second screen cylinder 19, so that the sand slides down the guide baffle 21 into the sand screening cylinder 13.

[0033] By sliding the telescopic part 23 on the mounting part 22, the overall length of the guide baffle 21 can be adjusted. With the mounting part 22 deflecting relative to the discharge frame 12, the guide baffle 21 has two states. In the first state, one end of the telescopic part 23 extends into the first screen cylinder 18 and is located outside the second screen cylinder 19. At this time, the sand falls into the first screen cylinder 18 and does not fall into the second screen cylinder 19. The sand can be dried through the first screen cylinder 18 to obtain coarser sand. In the second state, one end of the telescopic part 23 extends into the second screen cylinder 19. At this time, the sand is screened through the second screen cylinder 19 to obtain finer sand.

[0034] The mounting part 22 has side plates 29 on both sides. Each side plate 29 has a sliding groove 24 extending along the mounting part 22. A positioning bolt 25 is threaded onto the telescopic part 23. The positioning bolt 25 passes through the sliding groove 24. The projection of the nut portion of the positioning bolt 25 onto the side plate 29 is larger than the width of the sliding groove 24. Rotation of the side plate 29 causes the nut portion of the side plate 29 to abut against the edge of the sliding groove 24. Rotation of the positioning bolt 25 causes the nut of the positioning bolt 25 to abut against the edge of the sliding groove 24, thus limiting the movement of the telescopic part 23.

[0035] A limiting rod 26 is hinged to the side plate 29 near the higher end. One end of the limiting rod 26 is hinged to the side plate 29, and the other end is equipped with a positioning screw 27. Multiple vertically arranged positioning holes 28 are opened on the discharge frame 12. One end of the positioning screw 27 is embedded in the positioning hole 28 to limit the installation part 22.

[0036] A discharge plate 16 is provided on the lower side of the lower end of the sand screening cylinder 13. The discharge plate 16 is fixed on the support 10. The discharge plate 16 is used to receive and discharge the stones and other impurities screened out by the first screening cylinder 18 and the second screening cylinder 19.

[0037] Working process or usage method: 1. When coarser sand is required, the sand discharged from the discharge frame 12 is fed into the first screen cylinder 18 through the mounting part 22, but not into the second screen cylinder 19. At this time, the motor 14 is started to output power, driving the drive shaft 15 to rotate, which in turn drives the first screen cylinder 18 and the second screen cylinder 19 to rotate. The sand is screened through the first screen cylinder 18, and the screened sand falls onto the conveyor 17 for transportation. The screened stones and other impurities are discharged from the lower end of the first screen cylinder 18 and fall onto the discharge plate 16 for discharge. 2. When finer sand is required, the sand discharged from the discharge frame 12 is fed into the second screen cylinder 19 through the mounting part 22. At this time, the motor 14 is started to output power, driving the drive shaft 15 to rotate, which in turn drives the first screen cylinder 18 and the second screen cylinder 19 to rotate. Sand is screened through the second screen cylinder 19. Since the screen holes of the first screen cylinder 18 are larger, the finer sand screened out will fall directly through the screen holes of the first screen cylinder 18 onto the conveyor belt of the conveyor 17 and be transported by the conveyor 17. The screened stones and other impurities are discharged from the lower end of the second screen cylinder 19 and fall onto the discharge plate 16 and are discharged through the discharge plate 16.

[0038] 3. When it is necessary to adjust the coarseness of the screened sand, the telescopic part 23 slides on the mounting part 22 and deflects in coordination with the mounting part 22 to adjust the discharge position of the telescopic part 23. Then, the telescopic part 23 and the mounting part 22 are positioned by the positioning bolt 25 and the positioning screw 27.

[0039] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the application involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A sand screening machine for construction engineering, characterized in that, include: A support (10) is fixedly provided with a feed hopper (11); The conveyor (17) is installed at an angle on the bracket (10) and located below the feed hopper (11); The sand screening cylinder (13) is rotatably mounted on the support (10), and the sand screening cylinder (13) is inclined with one end higher and the other end lower. The discharge frame (12) is fixedly installed at the lower end of the bracket (10), and the sand in the feed hopper (11) is discharged through the discharge frame (12); The guide baffle (21) is movably installed on the discharge frame (12). After the sand is discharged from the discharge frame (12) and falls onto the guide baffle (21), it slides into the sand screening cylinder (13). The sand screening cylinder (13) includes a first screening cylinder (18) and a second screening cylinder (19) arranged coaxially. The first screening cylinder (18) is sleeved on the outside of the second screening cylinder (19). Both the first screening cylinder (18) and the second screening cylinder (19) are open at both ends. The side walls of the first screening cylinder (18) and the second screening cylinder (19) are provided with screen holes arranged in a row. The screen holes on the second screening cylinder (19) are smaller than the screen holes on the first screening cylinder (18).

2. The sand screening machine for construction engineering according to claim 1, characterized in that: The higher end of the first screen cylinder (18) and the second screen cylinder (19) is located below the feed hopper (11). The lower end of the second screen cylinder (19) is flush with the lower end of the first screen cylinder (18). The higher end of the second screen cylinder (19) is lower than the higher end of the first screen cylinder (18), so that the higher end of the second screen cylinder (19) is located inside the first screen cylinder (18). The guide baffle (21) is also inclined. The higher end of the guide baffle (21) is hinged to the discharge frame (12). The lower end of the guide baffle (21) faces the first screen cylinder (18) and the second screen cylinder (19), so that the sand slides down the guide baffle (21) into the sand screening cylinder (13).

3. A sand screening machine for construction engineering according to claim 2, characterized in that: A motor (14) is fixedly installed on the bracket (10). The power output end of the motor (14) is fixedly connected to a drive shaft (15) that passes through the first screen cylinder (18) and the second screen cylinder (19). A fixing rod (20) is provided between the drive shaft (15) and the first screen cylinder (18) and the second screen cylinder (19), and the drive shaft (15) is fixedly engaged with the first screen cylinder (18) and the second screen cylinder (19) through the fixing rod (20).

4. A sand screening machine for construction engineering according to claim 3, characterized in that: The guide baffle (21) includes: a mounting part (22) and a telescopic part (23). One end of the mounting part (22) is hinged to the discharge frame (12), so that the mounting part (22) is tilted relative to the discharge frame (12) to adjust the tilt angle. The telescopic part (23) is slidably engaged with the mounting part (22). The telescopic part (23) is located at the lower end near the mounting part (22). The telescopic part (23) slides out of the mounting part (22) to adjust the overall length of the guide baffle (21).

5. A sand screening machine for construction engineering according to claim 4, characterized in that: The mounting part (22) has side plates (29) on both sides. A sliding groove (24) extending along the mounting part (22) is provided on the side plate (29). A positioning bolt (25) is threaded on the telescopic part (23). The positioning bolt (25) passes through the sliding groove (24). The projection size of the nut part of the positioning bolt (25) on the side plate (29) is larger than the width of the sliding groove (24). The side plate (29) is rotated so that the nut part of the side plate (29) abuts against the edge of the sliding groove (24).

6. A sand screening machine for construction engineering according to claim 5, characterized in that: A limiting rod (26) is hinged to the side plate (29) near the higher end. One end of the limiting rod (26) is hinged to the side plate (29), and the other end is equipped with a positioning screw (27). The discharge frame (12) has multiple vertically arranged positioning holes (28). One end of the positioning screw (27) is embedded in the positioning hole (28) to limit the installation part (22).

7. A sand screening machine for construction engineering according to claim 1, characterized in that: The lower end of the sand screening cylinder (13) is provided with a discharge plate (16), which is fixed on the bracket (10).

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