A stone screening device for highway construction

Abstract

The invention discloses a stone screening device for highway construction, comprising a screening box, two discharge ports are respectively provided on both sides of the screening box, the horizontal height difference between the two discharge ports is greater than thirty centimeters, a No. 1 support plate is provided inside the screening box at a position relative to the discharge port, one end of the two No. 1 support plates away from the discharge port is rotatably connected to the inner wall of the screening box, a feeding port is bored at the middle of the top of the screening box, two No. 1 support plates are located directly below the feeding port and one end is bored with a feed through hole, a screen frame is provided above the feed through hole, a screening net is fixedly connected to the middle of the screen frame, a gathering hopper is provided at the bottom of the screening box, a fine material screening slot is fixedly connected to the outside of the screening box relative to the gathering hopper, the No. 1 support plate for supporting the screen frame can rotate in the screening box, the inclination angle of the screen frame can be controlled by rotating and adjusting the No. 1 threaded rod, the angle can be adjusted according to the amount of material screened at the same time, and the accuracy of material screening is improved.

Description

Technical field:

[0001] The invention belongs to the technical field of mechanical equipment, and in particular relates to a stone screening device for highway construction. Background technology:

[0002] Highway construction is one of the important indicators of a region's economic development. my country is a country with a large infrastructure and a large population. Its mileage has long exceeded one million kilometers. In the process of highway construction, in order to increase the service life of the highway, the foundation needs to be laid, and different sizes of fine sand, gravel and other materials need to be laid underground according to different stratifications.

[0003] In the prior art, when constructing a highway, it is necessary to screen the stones first, and then lay the stones of different sizes on different foundation layers. After searching (application number CN201320338199.X), a submarine cable riprap protection stone grading screening device is disclosed. The inventors found the following problems while realizing the prior art: 1. The device only screens the material through the screen, and its screening efficiency is low and the screening speed is slow; 2. The screen angle of the device is fixed, and it is difficult to adjust the screen angle more appropriately according to the actual working environment, material type and actual specific requirements of the work, and the actual working effect is not good; 3. It is difficult to reasonably clean the inside of the device, and the practicability is not good; 4. In addition, the device using an oscillating motor for screening in the prior art has a violent screen vibration during operation, which easily causes the material to splash everywhere, and the stability of the device is poor. Summary of the invention:

[0004] The purpose of the present invention is to provide a stone screening device for highway construction in order to solve the above problems. Smaller stones are collected into a collecting hopper through the vibration screening of two screens, and then transported into a fine material screening trough through the transportation of a spiral feeding rod. Due to the different aperture sizes of the feeding holes, stone powder, fine sand and gravel are obtained in sequence from the screening box, and the stone is further refined, thereby improving the fineness during foundation paving and improving the firmness of the foundation; a No. 1 support plate for supporting the screen frame can rotate in the screening box, and the inclination angle of the screen frame can be controlled by rotating and adjusting the No. 1 threaded rod, and the angle can be adjusted according to the amount of material screened at the same time, thereby improving the accuracy of material screening; damping rods and springs are provided at the bottom of the supporting legs supporting the screening box and the bottom of the screen frame. When the oscillation motor is working, the two sets of springs and the damping rods weaken the vibration by contraction, thereby avoiding the movement of the device due to high-frequency vibration during operation and increasing the stability of the device.

[0005] In order to solve the above problems, the present invention provides a technical solution for a stone screening device for highway construction:

[0006] The cam is provided with two support plates at two ends, and the two support plates are provided with one end each for supporting the other end of the cam.

[0007] As a preferred technical solution of the present invention, a No. 1 spring is provided at the four corners of the bottom of the screen frame, a No. 1 damping rod is sleeved inside the No. 1 spring, the tops of the No. 1 spring and the No. 1 damping rod are fixedly connected to the screen frame, the bottoms of the No. 1 spring and the No. 1 damping rod are fixedly connected to a No. 1 support plate, the tops of both sides of the two screen frames are fixedly connected to an oscillation motor, the bottom outer rings of the two screen frames are hinged with a material guide plate, the material guide plate and the screening net are connected by a No. 3 spring, and the two ends of the No. 3 spring are respectively fixedly connected to the material guide plate and the screening net.

[0008] As a preferred technical solution of the present invention, the two ends of the spiral feed rod are rotatably connected to the inner walls of the fine material screening trough and the screening box respectively, and the outer wall of the screening box is fixedly connected with a three-phase motor relative to the position of the spiral feed rod, and the output end of the three-phase motor passes through the wall of the screening box and is fixedly connected to the spiral feed rod.

[0009] As a preferred technical solution of the present invention, the outer wall of the screening box is fixedly connected to a No. 2 support plate at the bottom of the discharge port, a No. 1 threaded rod is provided on the top of the No. 2 support plate, and the top of the No. 1 threaded rod is connected to the No. 1 support plate.

[0010] As a preferred technical solution of the present invention, a rotating groove is bored out at the position of the No. 1 support plate relative to the No. 1 threaded rod, a turntable is rotatably connected inside the rotating groove, the No. 1 threaded rod is threadedly connected to the turntable, a rolling groove is bored out at the top of the No. 2 support plate, a rolling ball is movably connected inside the rolling groove, and the bottom of the No. 1 threaded rod is fixedly connected to the rolling ball.

[0011] As a preferred technical solution of the present invention, a plurality of feeding holes are equidistantly excavated on the wall of the fine material screening trough, and the diameters of the feeding holes of the fine material screening trough increase from small to large from the end close to the screening box.

[0012] As a preferred technical solution of the present invention, a cleaning door is hingedly connected to the upper part of the fine material screening trough 13 through an electromagnetic switch.

[0013] As a preferred technical solution of the present invention, a telescopic groove is bored on the top of the support block, a No. 2 damping rod is sleeved inside the No. 2 spring, the tops of the No. 2 spring and the No. 2 damping rod are fixedly connected to the No. 1 support rod, and the bottoms of the No. 2 spring and the No. 2 damping rod are fixedly connected to the telescopic groove.

[0014] As a preferred technical solution of the present invention, the outer wall of the lower end of the No. 1 support rod is fixedly connected to the No. 3 support plate, the top of the support block is rotatably connected to the No. 2 threaded rod, the No. 2 threaded rod is threadedly connected to the No. 3 support plate, and the bottoms of both ends of the No. 3 support plate are fixedly connected to universal wheels.

[0015] The beneficial effects of the present invention are as follows: 1. The screening device is provided with multiple screenings. First, the smaller stones are collected into the collecting hopper through the vibration screening of two screens, and then the smaller stones are transported to the fine material screening trough through the conveying of the spiral feeding rod. Due to the different aperture sizes of the feeding holes, stone powder, fine sand and gravel, etc. are obtained in sequence from the screening box, and the stone is further refined. Through this process, the unscreened materials are screened into five different grades and collected reasonably, thereby improving the fineness during foundation laying and improving the firmness of the foundation; 2. The No. 1 support plate used to support the screen frame can rotate in the screening box. By rotating and adjusting the No. 1 threaded rod, the inclination angle of the screen frame can be controlled. The angle can be adjusted according to the amount of material screened at the same time, thereby improving the accuracy of material screening; 3. The bottom of the support legs supporting the screening box and the screen frame The bottom of the device is equipped with a damping rod and a spring. When the oscillation motor is working, the two sets of springs and the damping rod weaken the vibration by contraction, so as to prevent the device from moving due to high-frequency vibration during operation and increase the stability of the device; 4. Through the control of the electromagnetic switch, when the device is not working and needs to be cleaned, the corresponding cleaning door can be opened to rinse and clean the inside, thereby improving the service life of the device; 5. Through the cooperation of the guide plate, oscillation motor, screening net and No. 3 spring and other components, part of the material falling into the edge of the screening net is hit to the group of materials falling faster in the middle of the screening net, which can prevent the material from splashing and falling into the lower components, and at the same time accelerate the falling speed of the material to a certain extent, so as to ensure that the diameter of the feeding port will not be too large to avoid dust flying during feeding, while meeting the reasonable screening of a large amount of material. Description of the drawings:

[0016] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the connection structure of the screen frame of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the concentrate screening tank of the present invention;

[0020] Figure 4 It is a schematic diagram of the enlarged structure of point A of the present invention;

[0021] Figure 5 It is a schematic diagram of the connection structure of the No. 1 threaded rod of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the support leg of the present invention.

[0023] In the figure: 1. screening box; 2. No. 1 support plate; 3. discharge port; 4. feed through hole; 5. No. 1 damping rod; 6. No. 1 spring; 7. screen frame; 8. oscillation motor; 9. screening net; 10. guide plate; 11. gathering hopper; 12. spiral feed rod; 13. fine material screening trough; 14. support leg; 15. three-phase motor; 16. No. 2 support plate; 17. rolling groove; 18. rolling ball; 19. No. 1 threaded rod; 20. rotating groove; 21. turntable; 22. feed hole; 23. feeding port; 24. No. 1 support rod; 25. No. 3 support plate; 26. support block; 27. telescopic groove; 28. No. 2 damping rod; 29. ​​No. 2 spring; 30. universal wheel; 31. No. 2 threaded rod; 32. No. 3 spring. Specific implementation method:

[0024] like Figure 1-6As shown, this specific embodiment adopts the following technical scheme: a stone screening device for highway construction, comprising a screening box 1, two discharge ports 3 are respectively excavated on both sides of the screening box 1, and the horizontal height difference between the two discharge ports 3 is greater than thirty centimeters. A No. 1 support plate 2 is provided inside the screening box 1 relative to the discharge port 3, and one end of the two No. 1 support plates 2 away from the discharge port 3 is rotatably connected to the inner wall of the screening box 1, a feeding port 23 is excavated in the middle of the top of the screening box 1, and a feeding through hole 4 is excavated at one end of the two No. 1 support plates 2 located directly below the feeding port 23. A screen frame 7 is provided above the feed through hole 4, a screen mesh 9 is fixedly connected to the middle of the screen frame 7, a collecting hopper 11 is provided at the bottom of the screening box 1, a fine material screening slot 13 is fixedly connected to the outside of the screening box 1 relative to the collecting hopper 11, a spiral feed rod 12 is provided inside the collecting hopper 11 and the fine material screening slot 13, support legs 14 are provided at the four corners of the bottom of the screening box 1, the support legs 14 include a No. 1 support rod 24, a support block 26 is provided at the bottom of the No. 1 support rod 24, and a No. 2 spring 29 is provided between the support block 26 and the No. 1 support rod 24.

[0025] Among them, a No. 1 spring 6 is provided at the four corners of the bottom of the screen frame 7, and a No. 1 damping rod 5 is sleeved inside the No. 1 spring 6. The tops of the No. 1 spring 6 and the No. 1 damping rod 5 are fixedly connected to the screen frame 7, and the bottoms of the No. 1 spring 6 and the No. 1 damping rod 5 are fixedly connected to the No. 1 support plate 2. The tops of both sides of the two screen frames 7 are fixedly connected with an oscillation motor 8, and the bottom outer rings of the two screen frames 7 are hinged with a guide plate 10, and the guide plate 10 and the screening net 9 are connected by a No. 3 spring 32, and the two ends of the No. 3 spring 32 are respectively fixedly connected to the guide plate 10 and the screening net 9.

[0026] Among them, the two ends of the spiral feed rod 12 are rotatably connected to the fine material screening groove 13 and the inner wall of the screening box 1 respectively, and the outer wall of the screening box 1 is fixedly connected with a three-phase motor 15 relative to the position of the spiral feed rod 12, and the output end of the three-phase motor 15 passes through the box wall of the screening box 1 and is fixedly connected to the spiral feed rod 12.

[0027] Among them, the outer wall of the screening box 1 is fixedly connected to the bottom of the discharge port 3 with a second support plate 16, and the top of the second support plate 16 is provided with a first threaded rod 19, and the top of the first threaded rod 19 is connected to the first support plate 2.

[0028] Among them, the No. 1 support plate 2 is provided with a rotating groove 20 at a position relative to the No. 1 threaded rod 19, and a turntable 21 is rotatably connected inside the rotating groove 20. The No. 1 threaded rod 19 is threadedly connected to the turntable 21. The top of the No. 2 support plate 16 is provided with a rolling groove 17, and a rolling ball 18 is movably connected inside the rolling groove 17. The bottom of the No. 1 threaded rod 19 is fixedly connected to the rolling ball 18.

[0029] The groove wall of the fine material screening groove 13 is equidistantly provided with a plurality of feeding holes 22 , and the diameters of the feeding holes 22 of the fine material screening groove 13 increase from small to large from the end close to the screening box 1 .

[0030] Among them, the upper part of the fine material screening trough 13 is hinged with a cleaning door through an electromagnetic switch. Through the control of the electromagnetic switch, when the device is not in operation and needs to be cleaned, the corresponding cleaning door can be opened to rinse and clean the inside, thereby increasing the service life of the device.

[0031] Among them, a telescopic groove 27 is bored on the top of the support block 26, and a No. 2 damping rod 28 is sleeved inside the No. 2 spring 29. The tops of the No. 2 spring 29 and the No. 2 damping rod 28 are fixedly connected to the No. 1 support rod 24, and the bottoms of the No. 2 spring 29 and the No. 2 damping rod 28 are fixedly connected to the telescopic groove 27.

[0032] Among them, the lower end outer wall of the No. 1 support rod 24 is fixedly connected to the No. 3 support plate 25, the top of the support block 26 is rotatably connected to the No. 2 threaded rod 31, the No. 2 threaded rod 31 is threadedly connected to the No. 3 support plate 25, and the bottoms of both ends of the No. 3 support plate 25 are fixedly connected to universal wheels 30.

[0033] Specifically: A stone screening device for highway construction, when in use, first rotate the No. 2 threaded rod 31, and the No. 3 support plate 25 is retracted by the rotation of the No. 2 threaded rod 31, so that the bottom of the universal wheel 30 is away from the road surface, and is in contact with the ground through the support block 26, and the No. 1 support rod 24 is cooperated to support the screening box 1, and according to the material to be screened and the screening time, the No. 1 threaded rod 19 is rotated. With the rotation of the No. 1 threaded rod 19, the turntable 21 moves downward, driving the No. 1 support plate 2 to rotate, and adjusting the inclination angle of the screening net 9. The support plate 2 is tilted, and the No. 1 threaded rod 19 is no longer vertical. The No. 1 threaded rod 19 adjusts the angle through the turntable 21 and the ball 18. After the adjustment is completed, the material is fed from the feeding port 23, and the material falls on the topmost screening net 9. The oscillation motor 8 is turned on, and the oscillation motor 8 drives the screen frame 7 to vibrate, thereby accelerating the speed at which the stone passes through the screening net 9. When the oscillation motor 8 is working, the No. 1 spring 6 and the No. 1 damping rod 5 at the bottom of the screen frame 7 weaken the vibration transmitted to the No. 1 support plate 2 by deformation, and the guide plate 10 also performs a certain reciprocating motion, and the material After the material passes through the screening mesh 9, the guide plate 10 will strike the material falling from the edge of the screening mesh 9 to a certain extent, so that part of the material falling into the edge of the screening mesh will be struck to the material group with a faster falling speed in the middle of the screening mesh 9, while preventing the material from splashing and falling into the lower layer components, it can also accelerate the falling speed of the material to a certain extent, and can ensure that the diameter of the feeding port 23 is not too large to avoid dust flying when feeding, while meeting the reasonable screening of a large amount of material, and the fine material falls into the gathering hopper 11, and at the same time, the material that has not passed through the screening mesh 9 will be The material is discharged from the discharge port 3 to the corresponding device for collection, and the three-phase motor 15 is turned on. The output end of the three-phase motor 15 drives the spiral discharge rod 12 to rotate, and the material is transported to one side of the fine material screening slot 13, and the smaller stone is transported to the fine material screening slot 13. Due to the different aperture sizes of the discharge holes 22, stone powder, fine sand and gravel, etc. are obtained from the screening box 1 in sequence, and the stone is further refined. Through this process, the unscreened materials are screened into five different grades and collected reasonably, which improves the fineness of the foundation during laying and improves the firmness of the foundation.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A stone screening device for highway construction, characterized in that: The invention comprises a screening box (1), two discharge ports (3) are respectively provided on both sides of the screening box (1), the horizontal height difference between the two discharge ports (3) is greater than thirty centimeters, a No. 1 support plate (2) is provided inside the screening box (1) at a position relative to the discharge port (3), one end of the two No. 1 support plates (2) away from the discharge port (3) is rotatably connected to the inner wall of the screening box (1), a feeding port (23) is provided in the middle of the top of the screening box (1), and a feeding through hole (4) is provided at one end of the two No. 1 support plates (2) located directly below the feeding port (23), a screen frame (7) is provided above the feeding through hole (4), a screening net (9) is fixedly connected to the middle of the screen frame (7), and the screening box (1) A material collecting hopper (11) is provided at the bottom of the screening box (1); a fine material screening slot (13) is fixedly connected to the outside of the screening box (1) at a position relative to the material collecting hopper (11); a spiral material discharge rod (12) is provided inside the material collecting hopper (11) and the fine material screening slot (13); support legs (14) are provided at the four corners of the bottom of the screening box (1); the support legs (14) include a No. 1 support rod (24); a support block (26) is provided at the bottom of the No. 1 support rod (24); a No. 2 spring (29) is provided between the support block (26) and the No. 1 support rod (24); a No. 1 spring (6) is provided at the four corners of the bottom of the screen frame (7); a No. 1 damping rod (5) is sleeved inside the No. 1 spring (6); the No. 1 spring (6) and the No. 1 damping rod (5) are connected to each other. The top of the rod (5) is fixedly connected to the screen frame (7), the bottom of the No. 1 spring (6) and the No. 1 damping rod (5) is fixedly connected to the No. 1 support plate (2), the tops of both sides of the two screen frames (7) are fixedly connected to the oscillation motor (8), the bottom outer rings of the two screen frames (7) are hingedly connected to the guide plate (10), the guide plate (10) and the screening net (9) are connected through the No. 3 spring (32), the two ends of the No. 3 spring (32) are respectively fixedly connected to the guide plate (10) and the screening net (9), the two ends of the spiral feed rod (12) are respectively rotatably connected to the fine material screening slot (13) and the inner wall of the screening box (1), and the outer wall of the screening box (1) is fixedly connected relative to the position of the spiral feed rod (12). A three-phase motor (15) is connected, the output end of the three-phase motor (15) passes through the box wall of the screening box (1) and is fixedly connected to the spiral discharge rod (12), the outer wall of the screening box (1) is located at the bottom of the discharge port (3) and is fixedly connected to a second support plate (16), the top of the second support plate (16) is provided with a first threaded rod (19), the top of the first threaded rod (19) is connected to the first support plate (2), the first support plate (2) is provided with a rotation groove (20) at a position relative to the first threaded rod (19), the interior of the rotation groove (20) is rotatably connected to a turntable (21), the first threaded rod (19) is threadedly connected to the turntable (21), the top of the second support plate (16) is provided with a rolling groove (17),The rolling groove (17) is movably connected to a rolling ball (18), and the bottom of the No. 1 threaded rod (19) is fixedly connected to the rolling ball (18); The wall of the fine material screening trough (13) is equidistantly provided with a plurality of feed holes (22), and the diameters of the feed holes (22) of the fine material screening trough (13) increase from small to large from the end close to the screening box (1); a cleaning door is hingedly connected to the upper part of the fine material screening trough (13) through an electromagnetic switch; a telescopic slot (27) is formed on the top of the support block (26), a second damping rod (28) is sleeved inside the second spring (29), the tops of the second spring (29) and the second damping rod (28) are fixedly connected to the first support rod (24), and the bottoms of the second spring (29) and the second damping rod (28) are fixedly connected to the telescopic slot (27).

2. A stone screening device for highway construction according to claim 1, characterized in that: The outer wall of the lower end of the No. 1 support rod (24) is fixedly connected to the No. 3 support plate (25), the top of the support block (26) is rotatably connected to the No. 2 threaded rod (31), the No. 2 threaded rod (31) is threadedly connected to the No. 3 support plate (25), and the bottoms of both ends of the No. 3 support plate (25) are fixedly connected to universal wheels (30).

Images