A sandstone aggregate grading and screening machine

Abstract

The utility model provides a kind of sand aggregate grading screening machine, it is related to sand aggregate screening technical field, and it includes: wind power screening machine and primary screening machine, the wind power screening machine left side outer wall is equipped with winnowing equipment, the winnowing equipment right side lumen is communicated with air outlet, the primary screening machine inside is provided with primary screening net cylinder, the primary screening net cylinder left side is connected with motor by coupling shaft, the wind power screening machine upper end is fixed with dust removal tank, the wind power screening machine right side end is connected with dust removal tank by first dust conveying pipe, the primary screening machine upper end is connected with first dust conveying pipe by second dust conveying pipe, dust removal filter plate is inserted in the dust removal tank, the wind power screening machine lower end is plugged with aggregate frame by grading discharge port.The utility model solves the problem that the air-blowing mechanism of screening machine in the prior art provides wind power sandstone separation, and dust is easily directly blown up to cause dust to intensify diffusion, harm worker's health.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel aggregate screening technology, specifically to a sand and gravel aggregate grading and screening machine. Background Technology

[0002] The particle size, strength, and purity of sand and gravel aggregates directly affect key indicators such as the durability of concrete and the smoothness of road surfaces. Therefore, before use, sand and gravel aggregates need to be screened by a screening machine to select those that meet the particle size specifications. After searching, the existing technology (announcement number: CN202322894710.0) is used for screening equipment for grading sand and gravel raw materials. The article states that "in this utility model, the blower mechanism is used to further grade the sand and gravel raw materials, so that the larger sand and gravel particles are gathered together, the sand and gravel particles with the most suitable particle size are gathered together, while the soil, mud, sand and gravel powder are directly discharged through one end of the screening box." However, in the existing technology, the blower mechanism of the screening machine provides air power to separate sand and gravel, which can easily blow up dust, leading to the problem of dust aggravation and harm to workers' health. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a sand and gravel aggregate grading and screening machine is provided to solve the problem that in existing technologies, the air blowing mechanism of the screening machine provides air power to separate sand and gravel, which easily blows up dust, causing the dust to spread more rapidly and endangering the health of workers.

[0004] To achieve the above objectives, a sand and gravel aggregate grading and screening machine is provided, comprising: a wind-powered screening machine and a primary screening machine, wherein the primary screening machine is connected to the upper end of the wind-powered screening machine via a fixed frame.

[0005] The wind-powered screening machine is equipped with an air separation device on its left outer wall. The air separation device has an air outlet connected to its right side pipe. The primary screening machine has a primary screening cylinder inside. The primary screening cylinder has a motor connected to its left side via a coupling. The upper end of the wind-powered screening machine is fixed with a dust collection box. The right end of the wind-powered screening machine is connected to the dust collection box via a first dust delivery pipe. The upper end of the primary screening machine is connected to the first dust delivery pipe via a second dust delivery pipe. A dust collection filter plate is inserted into the dust collection box. A material collection frame is inserted and sealed at the lower end of the wind-powered screening machine through a grading outlet.

[0006] Furthermore, a fixed frame is welded to the upper surface of the wind-powered screening machine, and a central control box is installed on the front end of the fixed frame; and the central control box is electrically connected to the wind-separating equipment.

[0007] Furthermore, the lower end face of the wind-powered screening machine has multiple graded discharge ports, and hydraulic columns are provided on the front and rear sides of the wind-classifying equipment. The upper end of the hydraulic columns is connected to the primary screening machine through a hinge.

[0008] Furthermore, a square discharge hood is installed on the upper inner wall of the wind-powered screening machine, and diverting blocks are symmetrically fixed on the inner side of the square discharge hood. The lower end of the primary screening machine is connected to the square discharge hood through a telescopic pipe.

[0009] Furthermore, a motor is installed on the left side of the primary screening machine, a feed hopper is fixed on the upper end of the motor, and a material blocking plug is plugged into the right side of the primary screening machine and the primary screening cylinder.

[0010] Furthermore, the left side of the primary screening cylinder is provided with a feed inlet, and the feed bin is connected to the feed inlet through a guide chute.

[0011] Furthermore, an exhaust port is provided on the left side wall of the dust collector, a dust discharge baffle is fastened to the lower end face of the dust collector, and a fan is installed on the surface of the second dust delivery pipe.

[0012] The beneficial effects of this utility model are as follows: the sand and gravel aggregate grading and screening machine of this utility model utilizes the rotation of the primary screening cylinder inside the primary screening machine to separate sand and gravel aggregates with larger particle sizes. The centrifugal force generated by the rotating airflow throws some dust particles out of the cylinder and into the dust collection box, which facilitates the pre-removal of some dust from the sand and gravel aggregates, reducing the amount of dust during the sand and gravel aggregate air classification process. The material collection frame inserted at the grading outlet at the lower end of the air classifier prevents the dust raised by the air classification from spreading from here, forming a relatively closed chamber. The first dust conveying pipe guides the dust raised by the air classification into the dust collection box for filtration and dust removal before discharge. This facilitates the reduction and prevention of dust generated by sand and gravel aggregate grading and screening from directly spreading into the surrounding environment, avoiding dust leakage, and saving dust removal energy consumption of the sand and gravel aggregate grading and screening machine. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the sand and gravel aggregate grading and screening machine according to an embodiment of the present utility model.

[0014] Figure 2 This is a front view cross-sectional structural diagram of the sand and gravel aggregate grading and screening machine according to an embodiment of the present utility model.

[0015] Figure 3 This is a side cross-sectional view of the square material feeding cover according to an embodiment of the present invention.

[0016] Figure 4 This is a side view of the primary screening cylinder according to an embodiment of the present invention.

[0017] In the diagram: 1. Air classifier; 11. Central control box; 12. Fixed frame; 13. Grading outlet; 14. Hydraulic column; 15. Square discharge hood; 16. Diverter block; 2. Air classifier; 21. Air outlet; 3. Primary screener; 31. Motor; 32. Feed hopper; 33. Fan; 34. Blocking plug; 35. Guide chute; 36. Telescopic pipe; 37. Hinge; 4. Collection frame; 5. Dust collector; 51. First dust conveying pipe; 52. Second dust conveying pipe; 53. Dust collector filter plate; 54. Exhaust port; 55. Dust discharge baffle; 6. Primary screen cylinder; 61. Feed inlet; 62. Coupling. Detailed Implementation

[0018] Reference Figures 1 to 4 As shown, this utility model provides a sand and gravel aggregate grading and screening machine, including: a wind-powered screening machine 1 and a primary screening machine 3. The primary screening machine 3 is connected to the upper end of the wind-powered screening machine 1 via a fixed frame 12.

[0019] The wind-powered screening machine 1 has an air separation device 2 installed on the outer left side. The air separation device 2 has an air outlet 21 connected to the right side of the pipe cavity. The primary screening machine 3 has a primary screening cylinder 6 installed inside. The primary screening cylinder 6 has a motor 31 connected to the left side of the primary screening cylinder 6 via a coupling 62. The upper end of the wind-powered screening machine 1 has a dust collection box 5 fixed. The right end of the wind-powered screening machine 1 is connected to the dust collection box 5 via a first dust delivery pipe 51. The upper end of the primary screening machine 3 is connected to the first dust delivery pipe 51 via a second dust delivery pipe 52. A dust collection filter plate 53 is inserted into the dust collection box 5. The lower end of the wind-powered screening machine 1 has a material collection frame 4 inserted and sealed via a grading discharge port 13.

[0020] First, the sand and gravel aggregate is poured from the feed hopper 32 into the primary screening cylinder 6 inside the primary screening machine 3. The motor 31 is started, causing the primary screening cylinder 6 to rotate and separate the sand and gravel aggregate introduced into the cylinder. The small-diameter sand and gravel aggregates thrown out by the rotation are discharged into the air classifier 1. At this time, the air classifier 2 starts to generate directional airflow. The air outlet 21 discharges directional airflow to blow the sand and gravel aggregates falling from the square discharge hood 15. Due to gravity, the sand and gravel aggregates of different diameters settle along different paths to the grading discharge port 13 and fall into the collection frame 4 for grading and collection. The dust generated by the rotation of the primary screening cylinder 6 and the dust raised by the air classifier 1 flow to the dust collection box 5 through the second dust conveying pipe 52 and the first dust conveying pipe 51. After being filtered by the three layers of dust removal filter plates 53 inside the dust collection box 5, the dust is discharged into the surrounding environment.

[0021] In this embodiment, a fixed frame 12 is welded to the upper end face of the wind-powered screening machine 1, and a central control box 11 is installed on the front end face of the fixed frame 12; the central control box 11 is electrically connected to the wind-separating device 2. A multi-stage discharge port 13 is opened on the lower end face of the wind-powered screening machine 1. Hydraulic columns 14 are arranged on the front and rear sides of the wind-separating device 2, and the upper ends of the hydraulic columns 14 are connected to the primary screening machine 3 via hinges 37. A square discharge hood 15 is installed on the upper inner wall of the wind-powered screening machine 1, and diverting blocks 16 are symmetrically fixed inside the square discharge hood 15. The lower end of the primary screening machine 3 is connected to the square discharge hood 15 via a telescopic pipe 36.

[0022] In a preferred implementation, the components within the central control box 11 control the electrical operation of the sand and gravel aggregate grading and screening process. The air classifier 2 generates directional airflow and discharges it into the chamber of the air classifier 1 through the outlet 21. The multi-group grading outlet 13 facilitates the discharge of sand and gravel aggregates that have settled along different paths due to gravity into the collection frame 4 for grading and collection. The inserted collection frame 4 correspondingly seals the grading outlet 13, forming a relatively sealed chamber within the air classifier 1. This allows the airflow within the air classifier 1 to flow only through the dust delivery pipe into the dust collector 5, facilitating effective dust removal while saving energy consumption in the sand and gravel aggregate grading and screening machine. The diversion block 16 within the square discharge hood 15 diverts the falling sand and gravel aggregates to three hood openings (all three openings are the same size) for discharge, facilitating the dispersion of the discharged sand and gravel aggregates and improving the sand and gravel aggregate air classification effect.

[0023] In this embodiment, a motor 31 is installed on the left side of the primary screening machine 3, and a feed hopper 32 is fixed on the upper end of the motor 31. A material blocking plug 34 is plugged into the right side of the primary screening machine 3 and the primary screening cylinder 6. A feed inlet 61 is opened on the left side of the primary screening cylinder 6, and the feed hopper 32 is connected to the feed inlet 61 through a guide groove 35.

[0024] In a preferred embodiment, the motor 31 facilitates the rotation and separation of the primary screening cylinder 6, throwing some dust particles out of the cylinder and into the dust collection box 5. This facilitates the pre-removal of some dust from the sand and gravel aggregates, reducing the amount of dust during the sand and gravel aggregate air separation process. By pushing the primary screening machine 3 upward with the hydraulic column 14, the primary screening machine 3 tilts and rotates around the axis connected to the fixed frame 12, causing the right end of the primary screening machine 3 to tilt downward. By removing the blockage plug 34, large-diameter sand and gravel aggregates can be discharged from the primary screening cylinder 6.

[0025] In this embodiment, an exhaust port 54 is provided on the left side wall of the dust collection box 5, a dust discharge baffle 55 is fastened to the lower end face of the dust collection box 5, and a fan 33 is installed on the surface of the second dust delivery pipe 52.

[0026] As a preferred implementation, the exhaust port 54 facilitates the discharge of filtered and dust-removed gas. The dust discharge baffle 55 facilitates the discharge of dust that falls or accumulates inside the dust collection box 5. The fan 33 facilitates the transport of dust generated inside the primary screening machine 3 to the dust collection box 5. The upper cover of the dust collection box 5 is removable, facilitating regular cleaning of the dust collection filter plates 53 inside the box.

[0027] This utility model of a sand and gravel aggregate grading and screening machine effectively solves the problem in existing screening machines where the blower mechanism provides airflow to separate sand and gravel, but this airflow directly blows up dust, leading to increased dust diffusion and harm to workers' health. It facilitates the pre-removal of some dust from the sand and gravel aggregates, reducing the amount of dust during the air separation process. This also helps to reduce and prevent the dust generated during sand and gravel aggregate grading and screening from directly spreading into the surrounding environment, avoiding dust leakage. Simultaneously, it saves on the dust removal energy consumption of the sand and gravel aggregate grading and screening machine, making it suitable for sand and gravel aggregate grading and screening machines.

Claims

1. A sand and gravel aggregate grading and screening machine, comprising: A wind-powered screening machine (1) and a primary screening machine (3), wherein the primary screening machine (3) is shaft-connected to the upper end of the wind-powered screening machine (1) via a fixed frame (12), characterized in that: The wind screening machine (1) is equipped with a wind classifier (2) on the outer left side. The wind classifier (2) has an air outlet (21) connected to the right side of the tube. The primary screening machine (3) is equipped with a primary screening cylinder (6). The primary screening cylinder (6) is connected to a motor (31) on the left side via a coupling (62). The upper end of the wind screening machine (1) is fixed with a dust collection box (5). The right end of the wind screening machine (1) is connected to the dust collection box (5) via a first dust delivery pipe (51). The upper end of the primary screening machine (3) is connected to the first dust delivery pipe (51) via a second dust delivery pipe (52). A dust collection filter plate (53) is inserted into the dust collection box (5). A material collection frame (4) is inserted and sealed at the lower end of the wind screening machine (1) via a grading outlet (13).

2. The sand and gravel aggregate grading and screening machine according to claim 1, characterized in that, The wind-powered screening machine (1) has a fixed frame (12) welded to its upper end face, and a central control box (11) is installed on the front end face of the fixed frame (12); and the central control box (11) is electrically connected to the wind-separating equipment (2).

3. The sand and gravel aggregate grading and screening machine according to claim 1, characterized in that, The wind-powered screening machine (1) has multiple graded discharge ports (13) on its lower end face. The wind-separating equipment (2) is equipped with hydraulic columns (14) on its front and rear sides. The upper end of the hydraulic columns (14) is connected to the primary screening machine (3) through a hinge (37).

4. The sand and gravel aggregate grading and screening machine according to claim 1, characterized in that, The upper inner wall of the wind-powered screening machine (1) is equipped with a square discharge hood (15), and the inner side of the square discharge hood (15) is symmetrically fixed with diverting blocks (16). The lower end of the primary screening machine (3) is connected to the square discharge hood (15) through a telescopic pipe (36).

5. A sand and gravel aggregate grading and screening machine according to claim 1, characterized in that, The primary screening machine (3) is equipped with a motor (31) on the left side, and a feed hopper (32) is fixed on the upper end of the motor (31). The primary screening machine (3) and the primary screening cylinder (6) are plugged with a material blocking plug (34) on the right side.

6. A sand and gravel aggregate grading and screening machine according to claim 5, characterized in that, The primary screening cylinder (6) has a feed inlet (61) on its left side, and the feed bin (32) is connected to the feed inlet (61) through the guide trough (35).

7. The sand and gravel aggregate grading and screening machine according to claim 1, characterized in that, The dust collector (5) has an exhaust port (54) on the left side wall, and a dust discharge baffle (55) is fastened to the lower end face of the dust collector (5). A fan (33) is installed on the surface of the second dust delivery pipe (52).

Images