Gravel aggregate grading vibrating screen

Abstract

The invention relates to a gravel aggregate grading vibrating screen which comprises a machine body, a damping base arranged at the bottom of the machine body, a feeding hopper arranged at the top of the machine body, a screen mesh arranged in the machine body, a first speed reducing plate arranged at the bottom of the feeding hopper, a reciprocating material distributing system arranged below the first speed reducing plate and located above the screen mesh, and a vibrating motor installed on the side face of the machine body. The reciprocating material distribution system comprises a guide plate, a movable groove and a hole groove are formed in the guide plate, a first rotating shaft penetrates through the hole groove, transverse grooves are symmetrically formed in the two side walls of the machine body, the two ends of the first rotating shaft are slidably connected with the machine body in the transverse grooves, a second rotating shaft penetrates through the movable groove and is fixedly connected with the side wall of the machine body, and the first rotating shaft and the second rotating shaft are arranged in parallel. The end of the first rotating shaft is connected with a crank sliding block mechanism. The gravel is decelerated through the first speed reducing plate and then evenly dispersed on the screen through the reciprocating material distributing system, the situation that the gravel excessively abrades the same position of the screen is avoided, the service life of the screen is prolonged, and the screening efficiency is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly to a vibrating screen for the grading of sand and gravel aggregates. Background Art

[0002] Sand and gravel are essential building materials in construction engineering. Sand and gravel aggregates with different gradings have different uses, so it is necessary to screen sand and gravel raw materials. Chinese Patent No. CN220781296U discloses a vibrating screen feeding device for sand and gravel materials. The sand and gravel raw materials entering from the feeding hopper are decelerated by the supporting plate and then fall onto the screen for screening, which can avoid the direct impact of sand and gravel at a high speed on the screen and improve the service life of the screen.

[0003] However, after adding the supporting plate to the screen, the landing point of the sand and gravel moves backward, resulting in a smaller effective utilization area of the screen. At the same time, the landing point of the sand and gravel is relatively fixed, and the sand and gravel fall at the same position on the screen, which will cause the local damage of the screen to be too fast, making the screen scrapped too quickly. Moreover, a large amount of sand and gravel falling at the same position on the screen also reduces the screening efficiency. Summary of the Invention

[0004] In view of the above-mentioned prior art, the present invention aims to provide a vibrating screen for the grading of sand and gravel aggregates, which can disperse the sand and gravel after passing through the buffer baffle more evenly on the screen, avoid the same position of the screen being impacted by the sand and gravel too quickly, and make the sand and gravel more evenly dispersed on the screen, thereby improving the screening efficiency.

[0005] To achieve the above object, the technical solution of the embodiment of the present invention is realized as follows:

[0006] A vibrating screen for the grading of sand and gravel aggregates includes a machine body. A shock-absorbing base is provided at the bottom of the machine body, a feeding hopper is provided at the top of the machine body, a screen is provided inside the machine body, a first deceleration plate is provided at the bottom of the feeding hopper, a reciprocating cloth-feeding system is provided below the first deceleration plate, the reciprocating cloth-feeding system is above the screen, a vibrating motor is installed on the side of the machine body, the reciprocating cloth-feeding system includes a guiding plate, an activity groove and a hole groove are provided on the guiding plate, a first rotating shaft penetrates through the hole groove, symmetric transverse grooves are provided on both side walls of the machine body, and both ends of the first rotating shaft are slidably connected to the machine body in the transverse grooves. A second rotating shaft penetrates through the activity groove, and the second rotating shaft is fixedly connected to the side wall of the machine body. The first rotating shaft and the second rotating shaft are arranged in parallel, and a crank-slider mechanism is connected to the end of the first rotating shaft.

[0007] Furthermore, the crank-slider mechanism includes a connecting rod and a crank. The end of the connecting rod is rotatably connected to the end of the crank, the other end of the connecting rod is rotatably connected to the end of the first rotating shaft, a turntable is provided on the machine body, the turntable is fixedly connected to the crank, a motor is provided on the outer wall of the machine body, and the motor is connected to the turntable through a belt.

[0008] Further, a sand prevention fence is provided on the inner wall of the body. The sand prevention fence is above the transverse groove. The sand prevention fence includes elastic plastic filaments, and the plastic filaments are longer than the height of the transverse groove.

[0009] Further, the screen mesh is inclined, the inclination direction of the bottom of the body is the same as that of the screen mesh, and the bottom of the body is smoothly arranged.

[0010] Further, the first deceleration plate is arranged on the left side wall of the feed hopper. There is a second deceleration plate above the first deceleration plate. The second deceleration plate is arranged on the right side wall of the feed hopper. Both the first deceleration plate and the second deceleration plate are inclined downward.

[0011] Further, the upper end of the guide plate is smoothly arranged.

[0012] Further, the screen mesh is connected to the inner wall of the body by a clamping groove. The body is provided with a clamping plate at the end connected to the screen mesh, and the clamping plate is bolted to the body.

[0013] Further, an elastic gasket is provided at the position where the clamping plate is connected to the screen mesh.

[0014] The beneficial effects of the present invention are as follows: The sand and gravel entering through the feed hopper first pass through the deceleration plate to reduce the speed and the impact force of the sand and gravel. Then, through the reciprocating feeding system, the sand and gravel falling from the deceleration plate are more evenly dispersed on the screen mesh, avoiding the continuous impact of the sand and gravel on the same position of the screen mesh, effectively extending the service life of the screen mesh. After the sand and gravel are dispersed on the screen mesh, the screening efficiency of the screen mesh can also be improved. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a vibration screen for grading sand and gravel aggregates of the present invention;

[0016] Figure 2 It is a sectional view of a vibration screen for grading sand and gravel aggregates of the present invention;

[0017] Figure 3 It is an enlarged view of area A of a vibration screen for grading sand and gravel aggregates of the present invention;

[0018] Figure 4 It is an enlarged view of area B of a vibration screen for grading sand and gravel aggregates of the present invention;

[0019] Figure 5 It is an enlarged view of area C of a vibration screen for grading sand and gravel aggregates of the present invention;

[0020] Figure 6 It is a schematic diagram of the inside of the transverse groove of a vibration screen for grading sand and gravel aggregates of the present invention.

[0021] Description of the attached reference numerals: 1. Body; 2. Shock-absorbing base; 3. Feeding hopper; 4. Vibration motor; 5. Screen; 6. First speed reducer plate; 7. Second speed reducer plate; 8. Guide plate; 9. Motor; 10. First rotating shaft; 11. Connecting rod; 12. Crank; 13. Turntable; 14. Horizontal groove; 15. Second rotating shaft; 16. Movable groove; 17. Clamping plate; 18. Elastic gasket; 19. Hole groove; 20. Anti-sand fence. Detailed implementation mode

[0022] The technical solution of the present invention will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" describes a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0023] With reference to the attached Figures 1 to 6, the present invention provides a vibrating screen for the grading of sand and gravel aggregates, including a machine body 1, a shock-absorbing base 2 is provided at the bottom of the machine body 1, a feeding hopper 3 is provided at the top of the machine body 1, a screen mesh 5 is provided inside the machine body 1, a speed-reducing plate 1 is provided at the bottom of the feeding hopper 3, a reciprocating cloth-feeding system is provided below the speed-reducing plate 1, the reciprocating cloth-feeding system is above the screen mesh 5, and a vibrating motor 4 is installed on the side of the machine body 1. The reciprocating cloth-feeding system includes a guiding plate 8, an activity slot 16 and a hole slot 19 are provided on the guiding plate 8, a rotating shaft 1 is penetrated in the hole slot 19, transverse slots 14 are symmetrically provided on both side walls of the machine body 1, and both ends of the rotating shaft 1 are slidably connected with the machine body 1 in the transverse slots 14, a rotating shaft 2 is penetrated in the activity slot 16, the rotating shaft 2 is fixedly connected with the side wall of the machine body 1, the rotating shaft 1 and the rotating shaft 2 are arranged in parallel, and a crank-slider mechanism is connected to the end of the rotating shaft 1. The machine body is placed on the ground via the shock-absorbing base 2, the screen mesh inside the machine body 1 screens the sand and gravel under the action of the vibrating motor 4, the sand and gravel raw materials enter from the feeding hopper 3, are blocked and decelerated by the speed-reducing plate 1, and fall along the speed-reducing plate 1. In the following reciprocating cloth-feeding system, the crank-slider mechanism outside the machine body 1 is connected to the end of the rotating shaft 1, so that the rotating shaft 1 makes a reciprocating motion along the transverse slot 14, the rotating shaft 2 is fixedly connected to the machine body 1, and the rotating shaft 2 penetrates the activity slot 16 on the guiding plate 8. When the rotating shaft 1 moves backward from the middle of the transverse slot 14, the entire guiding plate 8 makes a rotating motion via the rotating shaft 2, and the sand and gravel falling from the speed-reducing plate 1 fall on the screen mesh under the guiding of the left side surface of the guiding plate 8. When the rotation angle of the guiding plate 8 increases, the falling point of the sand and gravel is farther. When the rotating shaft 1 returns to the middle of the transverse slot 14 and moves leftward, the entire guiding plate 8 rotates in the opposite direction, and the sand and gravel falling from the speed-reducing plate 1 fall on the screen mesh under the guiding of the right side surface of the guiding plate 8. During the continuous reciprocating motion of the rotating shaft 1, the falling points of the sand and gravel on the screen mesh change from left to right continuously. The entire vibrating screen not only reduces the falling speed of the sand and gravel, but also avoids all the sand and gravel continuously impacting the same position on the screen mesh, resulting in too fast local damage of the screen mesh, prolongs the service life of the entire screen mesh. At the same time, when the sand and gravel fall on the screen mesh, they are more evenly dispersed, which can improve the screening efficiency of the screen mesh. The crank-slider mechanisms outside the machine body 1 act simultaneously from both ends of the rotating shaft 1, and the entire rotating shaft 1 is more stable during the reciprocating motion, ensuring that the guiding plate 8 rotates more stably to the left and right.

[0024] Preferably, the crank-slider mechanism includes a connecting rod 11 and a crank 12. The end of the connecting rod 11 is rotatably connected to the end of the crank 12, and the other end of the connecting rod 11 is rotatably connected to the end of the first rotating shaft 10. A turntable 13 is provided on the machine body 1, and the turntable 13 is fixedly connected to the crank 12. A motor 9 is arranged on the outer wall of the machine body 1, and the motor 9 is connected to the turntable 13 through a belt. The motor 9 is arranged outside the machine body 1, and the motor 9 drives the turntable 13 to rotate continuously through the belt. The crank 12 fixedly connected to the turntable 13 also rotates. During the circular motion of the crank 12, the crank 12 and the connecting rod 11 are rotatably connected through a protruding rotating shaft. Due to the limitation of the horizontal groove 14 on the up-and-down direction of the first rotating shaft 10, the connecting rod 11 drives the first rotating shaft 10 to reciprocate in the horizontal groove 14.

[0025] Preferably, a sand-proof fence 20 is provided on the inner wall of the machine body 1. The sand-proof fence 20 is above the horizontal groove 14. The sand-proof fence 20 includes elastic plastic filaments, and the plastic filaments are longer than the height of the horizontal groove 14. The sand-proof fence 20 is arranged at the horizontal groove 14 on the inner wall of the machine body 1 to prevent flying sand and gravel from falling into the horizontal groove 14 and affecting the reciprocating motion of the first rotating shaft 10. The sand-proof fence 20 includes elastic plastic filaments, which are higher than the height of the horizontal groove 14, ensuring that sand and gravel can be completely blocked from entering the horizontal groove 14. At the place where the first rotating shaft 10 passes, the elastic plastic filaments are elastically deformed and will not hinder the movement of the first rotating shaft 10. After the first rotating shaft 10 moves away, the elastic plastic filaments at the original position return to their original state and continue to block sand and gravel from entering the horizontal groove 14.

[0026] Preferably, the screen 5 is inclined, the inclination direction of the bottom of the machine body 1 is the same as the inclination direction of the screen 5, and the bottom of the machine body 1 is smooth. The screen 5 is inclined, and the bottom of the machine body 1 is smooth and inclined. Under the action of vibration and gravity, the sand and gravel that have completed screening naturally flow towards the outlet.

[0027] Preferably, a first deceleration plate 6 is arranged on the left side wall of the feeding hopper 3, a second deceleration plate 7 is arranged above the first deceleration plate 6, and the second deceleration plate 7 is arranged on the right side wall of the feeding hopper 3. Both the first deceleration plate 6 and the second deceleration plate 7 are inclined downward. In the case of only the first deceleration plate 6, some sand and gravel will fall without being decelerated and blocked. By arranging the second deceleration plate 7 above the first deceleration plate 6, it is ensured that all sand and gravel are blocked and decelerated, reducing the damage to the screen 5. At the same time, the sand and gravel on the first deceleration plate 6 fall to the right and are then evenly distributed through the lower guiding plate 8. If the sand and gravel on the first deceleration plate 6 fall to the left, the range of the sand and gravel distributed through the guiding plate 8 is smaller.

[0028] Preferably, the upper end of the guiding plate 8 is smooth. The smooth upper end of the guiding plate 8 can effectively reduce the impact of the falling sand and gravel on the upper end of the guiding plate 8 and reduce the damage to the reciprocating feeding system.

[0029] Preferably, the screen mesh 5 is connected to the inner wall card slot of the machine body 1. The machine body 1 is provided with a clamping plate 17 at the end connected to the screen mesh 5, and the clamping plate 17 is bolted to the machine body 1. The screen mesh 5 is connected to the inner wall card slot of the machine body 1, and the clamping plate 17 bolted to the machine body 1 blocks and limits the screen mesh 5 to prevent the screen mesh 5 from slipping. Only by using the clamping plate 17 at the tail end of the machine body 1 can the screen mesh 5 be fixed, which greatly facilitates the replacement of the screen mesh 5. There is no need to screw bolts inside the machine body 1, saving time. There is no need to set bolt holes on the screen mesh 5, and damage to the screen mesh 5 caused by bolt connection can also be avoided.

[0030] Preferably, an elastic gasket 18 is provided at the position where the clamping plate 17 is connected to the screen mesh 5. Using the elastic gasket 18 can reduce the extrusion damage of the clamping plate 17 to the screen mesh 5.

[0031] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A sand and gravel aggregate grading vibrating screen, comprising a body (1), a shock-absorbing base (2) is provided at the bottom of the body (1), and a feed hopper (3) is provided at the top of the body (1), characterized in that: A screen (5) is provided in the machine body (1), a deceleration plate (6) is provided at the bottom of the feed hopper (3), a reciprocating material distribution system is provided below the deceleration plate (6), the reciprocating material distribution system is above the screen (5), a vibration motor (4) is installed on the side of the machine body (1), the reciprocating material distribution system includes a guide plate (8), a movable groove (16) and a hole groove (19) are provided on the guide plate (8), and the hole groove (19) is penetrated by a A rotating shaft (10) is provided. Transverse grooves (14) are symmetrically provided on the two side walls of the machine body (1). The two ends of the rotating shaft (10) are slidably connected to the machine body (1) in the transverse grooves (14). A rotating shaft (15) passes through the movable groove (16). The rotating shaft (15) is fixedly connected to the side wall of the machine body (1). The rotating shaft (10) and the rotating shaft (15) are arranged in parallel. The ends of the rotating shaft (10) are connected to a crank slider mechanism.

2. A sand and gravel aggregate grading vibrating screen according to claim 1, characterized in that: The crank slider mechanism comprises a connecting rod (11) and a crank (12), the end of the connecting rod (11) is rotatably connected to the end of the crank (12), and the other end of the connecting rod (11) is rotatably connected to the end of a rotating shaft (10). A turntable (13) is provided on the machine body (1), and the turntable (13) is fixedly connected to the crank (12). A motor (9) is provided on the outer wall of the machine body (1), and the motor (9) is connected to the turntable (13) via a belt.

3. A sand and gravel aggregate grading vibrating screen according to claim 2, characterized in that: A sand-proof fence (20) is provided on the inner wall of the machine body (1), and the sand-proof fence (20) is above the transverse groove (14). The sand-proof fence (20) comprises elastic plastic wires, and the plastic wires are longer than the height of the transverse groove (14).

4. A sand and gravel aggregate grading vibrating screen according to claim 1, characterized in that: The screen (5) is arranged obliquely, the inclination direction of the bottom of the machine body (1) is consistent with the inclination direction of the screen (5), and the bottom of the machine body (1) is arranged smoothly.

5. The sand and gravel aggregate grading vibrating screen according to claim 1, characterized in that: The deceleration plate 1 (6) is arranged on the left side wall of the feed hopper (3), a deceleration plate 2 (7) is arranged above the deceleration plate 1 (6), and the deceleration plate 2 (7) is arranged on the right side wall of the feed hopper (3), and the deceleration plate 1 (6) and the deceleration plate 2 (7) are both inclined downward.

6. According to the sand and gravel aggregate grading vibrating screen according to claim 1, it is characterized by: The upper end portion of the guide plate (8) is arranged to be smooth.

7. A sand and gravel aggregate grading vibrating screen according to claim 1, characterized in that: The screen (5) is connected to the inner wall groove of the machine body (1); the machine body (1) is provided with a clamping plate (17) at the end connected to the screen (5); the clamping plate (17) is bolted to the machine body (1).

8. A sand and gravel aggregate grading vibrating screen according to claim 7, characterized in that: The clamping plate (17) is provided with an elastic gasket (18) at the position where it is connected to the screen (5).

Images