Raw material screening device for concrete preparation

Abstract

The utility model discloses a raw material screening device for concrete preparation, and relates to the technical field of concrete preparation. The screening device comprises a screening device body, a feeding pipe is fixed to the upper end of the screening device body, a discharging pipe is fixed to the lower end of the screening device body, a first screen and a second screen are installed in the screening device body, and discharging doors are installed at the positions, corresponding to the first screen and the second screen, of the side face of the screening device body; a shaking structure is arranged between the screening device body and the first screen and between the screening device body and the second screen, a controller is fixed to the surface of the screening device body, supporting legs are fixed to the four corners of the lower end of the screening device, a conveying belt is arranged between the supporting legs, and a dust collecting structure is arranged at the lower end of a discharging pipe. Dust collection is achieved through the dust collection structure, so that dust flying around can be reduced, dust attached to surrounding workers is reduced, and suction of the workers is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of concrete preparation, and in particular to a raw material screening device for concrete preparation. Background Art

[0002] Concrete is one of the most important civil engineering materials today. It is an artificial stone material made by mixing cementitious materials, aggregates, water, and, if necessary, admixtures and additives in a specific proportion. The mixture is then uniformly mixed, compacted, and cured to harden. Before concrete processing, screening equipment is required to sieve the raw materials to ensure they meet the requirements.

[0003] A prior Chinese patent application (grant publication number: CN219401072U) describes a concrete preparation raw material screening device comprising a screening box equipped with a feed hopper and a discharge pipe. The screening box comprises two inclined sieve trays within the screening box, a coarse material outlet provided on the sidewalls of the screening box, and a rectangular frame below the sieve trays. The downwardly inclined ends of the sieve trays are hinged to the rectangular frame, while the upwardly inclined ends of the sieve trays are connected to the rectangular frame via a first spring. The rectangular frame is slidably connected to the screening box, and the ends of the rectangular frame along its sliding direction are connected to the sidewalls of the screening box via second springs. A motor is mounted on the sidewalls of the screening box, equipped with a first transmission member that drives the two rectangular frames to slide horizontally back and forth. A pressure plate is fixedly connected to the upwardly inclined ends of the sieve trays, and a cam abuts the upper end of the pressure plate. The motor is connected to the two cams via a second transmission member to drive the cams to rotate. This patent application achieves multi-stage screening and simultaneously vibrates the sieve trays horizontally and vertically, resulting in high screening efficiency and excellent screening results.

[0004] When the existing concrete preparation raw material screening device screens the concrete raw materials, when the screened materials fall, since the materials are mostly sand and gravel, and dust is attached to the surface of these sand and gravel, the materials collide with each other, and dust will float everywhere, attaching to the bodies of surrounding workers and easily being inhaled by the workers. Utility Model Content

[0005] The purpose of this application is to solve the problem that dust will float around when the material falls, adhere to the bodies of surrounding workers, and be easily inhaled by the workers. This application provides a raw material screening device for concrete preparation.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] A raw material screening device for concrete preparation includes a screening device body, a feed pipe is fixed to the upper end of the screening device body, a discharge pipe is fixed to the lower end of the screening device body, screen 1 and screen 2 are installed inside the screening device body, discharge doors are installed at positions corresponding to screen 1 and screen 2 on the side of the screening device body, a shaking structure is provided between the screening device body and screen 1 and screen 2, a controller is fixed to the surface of the screening device body, support legs are fixed to the four corners of the lower end of the screening device, a conveyor belt is provided between the support legs, and a dust collection structure is provided at the lower end of the discharge pipe.

[0008] By adopting the above technical solution, when screening the raw materials, the raw materials are poured into the device from the feed pipe, and screened through screen one and screen two. The shaking structure is used to screen the raw materials, and the screening effect is good. At the same time, when unloading, the dust can be collected through the dust collecting structure to reduce the dispersion of dust.

[0009] Furthermore, the dust collecting structure includes a dust cover fixed to the upper and lower ends of the discharge pipe, a guide pipe is fixed to the side of the dust cover, a dust collecting box is fixed to the end of the guide pipe away from the dust cover, a mounting plate is fixed to the end of the dust collecting box away from the guide pipe, ventilation holes are opened on the mounting plate, and a dust collecting assembly is arranged on the mounting plate.

[0010] By adopting the above technical solution, when the screened materials fall onto the conveyor belt, the dust collecting structure can collect the generated dust, thereby reducing the dust from floating around.

[0011] Furthermore, the dust collection component includes a mounting frame fixed on the mounting plate, a motor 1 is fixed inside the mounting frame, the controller is electrically connected to motor 1, a fan blade is fixed at the output end of motor 1, and an interception net is fixed on the inner wall of the mounting frame.

[0012] By adopting the above technical solution, the dust collecting component provides suction for dust collection, and the dust is sucked into the dust collecting box.

[0013] Furthermore, a connecting pipe is fixed to one end of the guide pipe extending into the dust cover, and a plurality of diversion pipes are fixed to the connecting pipe.

[0014] By adopting the above technical solution, the shunt pipe can be used to expand the dust collection range and improve the dust collection effect.

[0015] Furthermore, a barrier net is fixed inside the diversion pipe.

[0016] By adopting the above technical solution, larger particles of raw materials can be blocked by using the barrier net.

[0017] Furthermore, the shaking structure includes a connecting column fixed at the lower ends of screen one and screen two, a connecting block is fixed inside the screening device body, the connecting column slides through the connecting block, and a driving assembly is provided on the side of the screening device body.

[0018] By adopting the above technical solution, the shaking structure is used to shake the screen 1 and the screen 2 up and down, so that the concrete raw materials falling on the screen 1 and the screen 2 can be shaken, reducing blockage and improving the screening effect.

[0019] Furthermore, the driving assembly includes a second motor fixed on the side of the screening device body, the output end of the second motor is rotatably connected to the screening device body, a cam is fixed to the output end of the second motor, and the lower end of the connecting column is rotatably connected to a contact wheel, which contacts the cam.

[0020] By adopting the above technical solution, the second motor drives the cam to rotate so that the connecting column moves, thereby providing power for the up and down shaking of the first and second screens.

[0021] Furthermore, a return spring is fixed to the lower end of each of the screens 1 and 2, and the lower end of the return spring is fixedly connected to the connecting block.

[0022] By adopting the above technical solution, the return spring can impose certain restrictions on the screen 1 and the screen 2, so that the conflict wheel is always in contact with the cam.

[0023] In summary, this application has at least one of the following beneficial effects:

[0024] 1. Turn on motor 1 through the controller, so that motor 1 drives the fan blades to rotate. When the fan blades rotate, suction is generated, so that the dust enters the connecting pipe through the diversion pipe, and then enters the guide pipe through the connecting pipe, and finally enters the dust collecting box and is intercepted by the interception net, thereby realizing the collection of dust, thereby reducing the scattering of dust, reducing the attachment to surrounding workers, and reducing the inhalation of workers.

[0025] 2. When screening the concrete raw materials, the controller turns on motor 2 to make motor 2 work. When motor 2 works, it drives the cam to rotate. During the rotation of the cam, the unevenness of the cam surface causes the resistance wheel to rotate, and the connecting column to move up and down continuously, so that screen 1 and screen 2 shake back and forth up and down, reducing the blockage of the mesh, thereby improving the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the screening device in this application;

[0027] Figure 2 is a cross-sectional view of the dust box in this application;

[0028] Figure 3 This application Figure 2 A in the middle is an enlarged schematic diagram;

[0029] Figure 4 This application Figure 2 The enlarged schematic diagram of point B in the middle;

[0030] Figure 5 It is a schematic diagram of the internal structure of the screening device body in this application;

[0031] Figure 6 This application Figure 5 Enlarged schematic diagram at point C in the middle.

[0032] Description of reference numerals:

[0033] 1. Screening device body; 2. Feed pipe; 3. Discharge pipe; 4. Screen 1; 5. Screen 2; 6. Controller; 7. Support legs; 8. Conveyor belt; 9. Dust cover; 10. Guide pipe; 11. Dust box; 12. Mounting plate; 13. Motor 1; 14. Fan blades; 15. Intercepting net; 16. Connecting pipe; 17. Diverter pipe; 18. Connecting column; 19. Reset spring; 20. Connecting block; 21. Motor 2; 22. Cam; 23. Interference wheel; 24. Mounting frame; 25. Barrier net. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The embodiment of the present application discloses a raw material screening device for concrete preparation.

[0036] Reference Figure 1 and Figure 2 A raw material screening device for concrete preparation includes a screening device body 1, a feed pipe 2 is fixed to the upper end of the screening device body 1, a discharge pipe 3 is fixed to the lower end of the screening device body 1, a screen 1 4 and a screen 2 5 are installed inside the screening device body 1, and discharge doors are installed at positions corresponding to the side of the screening device body 1 and the screen 1 4 and the screen 2 5. A shaking structure is provided between the screening device body 1 and the screen 1 4 and the screen 2 5. A controller 6 is fixed to the surface of the screening device body 1, support legs 7 are fixed to the four corners of the lower end of the screening device, a conveyor belt 8 is provided between the support legs 7, and a dust collection structure is provided at the lower end of the discharge pipe 3.

[0037] When screening the concrete raw materials, the shaking mechanism is activated to cause the screen 1 4 and the screen 2 5 to begin shaking, and the dust collection mechanism is activated at the same time. The concrete raw materials are then fed into the screening device body 1 through the feed pipe 2. The concrete raw materials entering the screening device body 1 will first fall onto the screen 1 4. The shaking of the screen 1 4 will screen out the larger pieces of concrete raw materials, and the rest will fall onto the screen 2 5. The shaking of the screen 2 5 causes the concrete raw materials that meet the requirements to fall from the screen 2 5 and finally fall onto the conveyor belt 8 through the discharge pipe 3 and are then delivered via the conveyor belt 8. During the screening process, the shaking mechanism can cause the screen 1 4 and the screen 2 5 to shake up and down, which can improve the screening effect. The dust collection mechanism can collect dust, reduce the dust from floating around, reduce the dust from adhering to the surrounding workers, and reduce the workers' inhalation.

[0038] Reference Figure 2-Figure 4 The dust collecting structure includes a dust cover 9 fixed at the upper and lower ends of the discharge pipe, a guide pipe 10 is fixed on the side of the dust cover 9, a dust collecting box 11 is fixed on the end of the guide pipe 10 away from the dust cover 9, and a mounting plate 12 is fixed on the end of the dust collecting box 11 away from the guide pipe 10. Ventilation holes are opened on the mounting plate 12, and a dust collecting component is set on the mounting plate 12.

[0039] Among them, the dust collection component includes a mounting frame 24 fixed on the mounting plate 12, a motor 13 is fixed inside the mounting frame 24, the controller 6 is electrically connected to the motor 13, a fan blade 14 is fixed at the output end of the motor 13, and an interception net 15 is fixed on the inner wall of the mounting frame 24.

[0040] In addition, a connecting pipe 16 is fixed to one end of the flow guide pipe 10 extending into the dust cover 9 , and a plurality of diversion pipes 17 are fixed to the connecting pipe 16 .

[0041] When the aggregate raw materials are screened, dust will be generated when the screened materials fall on the conveyor belt 8. The dust can be shielded by the dust cover 9. At the same time, the motor 13 is turned on by the controller 6, so that the motor 13 works to drive the fan blades 14 to rotate. When the fan blades 14 rotate, suction is generated, so that the dust enters the connecting pipe 16 through the diversion pipe 17, and then enters the guide pipe 10 through the connecting pipe 16, and finally enters the dust collecting box 11, and is intercepted by the interception net 15, thereby realizing the collection of dust, thereby reducing the scattering of dust.

[0042] Reference Figure 2 and Figure 4 A barrier net 25 is fixed inside the diversion pipe 17.

[0043] The barrier net 25 can be used to block larger pieces of raw material slag, reducing the blockage caused to the pipeline.

[0044] Reference Figure 5 and Figure 6 The shaking structure includes a connecting column 18 fixed at the lower ends of screen 1 4 and screen 2 5, a connecting block 20 is fixed inside the screening device body 1, the connecting column 18 slides through the connecting block 20, and a driving component is provided on the side of the screening device body 1.

[0045] Among them, the driving component includes a motor 21 fixed on the side of the screening device body 1, the output end of the motor 21 is rotatably connected to the screening device body 1, and a cam 22 is fixed to the output end of the motor 21. The lower end of the connecting column 18 is rotatably connected to a contact wheel 23, and the contact wheel 23 contacts the cam 22. The contact wheel 23 contacts the cam 22, and when the cam 22 rotates, the contact wheel 23 will rotate, thereby enabling the up and down movement of the screen 1 4 and the screen 2 5 to be smoother.

[0046] In addition, the lower ends of screen 1 4 and screen 2 5 are fixed with return springs 19 , and the lower ends of the return springs 19 are fixedly connected to the connecting block 20 . The return springs 19 can ensure that the contact wheel 23 is always in contact with the cam 22 .

[0047] When screening the concrete raw materials, the motor 21 is turned on by the controller 6, so that the motor 21 works. When the motor 21 works, the cam 22 is driven to rotate. During the rotation of the cam 22, the uneven surface of the cam 22 causes the contact wheel 23 to rotate, and the connecting column 18 is continuously moved up and down, so that the screen 1 4 and the screen 2 5 are reciprocated up and down, thereby improving the screening effect.

[0048] Working principle: When screening the concrete raw materials, the motor 21 is turned on by the controller 6, so that the motor 21 works. When the motor 21 works, it drives the cam 22 to rotate. During the rotation of the cam 22, the unevenness of the surface of the cam 22 causes the friction wheel 23 to rotate, and the connecting column 18 is continuously moved up and down, so that the screen 1 4 and the screen 2 5 shake back and forth up and down, and the motor 13 is turned on to make it work, and then the concrete raw materials are put into the screening device body 1 through the feeding pipe 2. The concrete raw materials entering the screening device body 1 will first fall on the screen 1 4. Under the shaking of the screen 1 4, the larger pieces of concrete raw materials are screened out, and the rest fall on the screen 2 5. The shaking of the screen 2 5 causes the concrete raw materials that meet the requirements to fall from the screen 2 5, and finally fall onto the conveyor belt 8 through the discharge pipe 3 and are sent out via the conveyor belt 8;

[0049] When the concrete raw materials fall onto the conveyor belt 8, the dust generated during the falling process can be shielded by the dust cover 9. At the same time, the motor 13 drives the fan blades 14 to rotate. When the fan blades 14 rotate, suction is generated, so that the dust enters the connecting pipe 16 through the diversion pipe 17, and then enters the guide pipe 10 through the connecting pipe 16, and finally enters the dust collecting box 11, and is intercepted by the interception net 15, thereby realizing the collection of dust.

Claims

1. A raw material screening device for concrete preparation, comprising a screening device body (1), characterized in that: A feed pipe (2) is fixed to the upper end of the screening device body (1), a discharge pipe (3) is fixed to the lower end of the screening device body (1), screen mesh 1 (4) and screen mesh 2 (5) are installed inside the screening device body (1), discharge doors are installed at positions corresponding to screen mesh 1 (4) and screen mesh 2 (5) on the side of the screening device body (1), a shaking structure is provided between the screening device body (1) and screen mesh 1 (4) and screen mesh 2 (5), a controller (6) is fixed to the surface of the screening device body (1), support legs (7) are fixed to the four corners of the lower end of the screening device, a conveyor belt (8) is provided between the support legs (7), and a dust collecting structure is provided at the lower end of the discharge pipe (3).

2. A raw material screening device for concrete preparation according to claim 1, characterized in that: The dust collecting structure comprises a dust cover (9) fixed to the upper and lower ends of the discharge pipe, a guide pipe (10) is fixed to the side of the dust cover (9), a dust collecting box (11) is fixed to the end of the guide pipe (10) away from the dust cover (9), a mounting plate (12) is fixed to the end of the dust collecting box (11) away from the guide pipe (10), a ventilation hole is opened on the mounting plate (12), and a dust collecting component is arranged on the mounting plate (12).

3. A raw material screening device for concrete preparation according to claim 2, characterized in that: The dust collecting assembly comprises a mounting frame (24) fixed on a mounting plate (12), a motor 1 (13) is fixed inside the mounting frame (24), the controller (6) is electrically connected to the motor 1 (13), a fan blade (14) is fixed to the output end of the motor 1 (13), and an interception net (15) is fixed to the inner wall of the mounting frame (24).

4. A raw material screening device for concrete preparation according to claim 2, characterized in that: A connecting pipe (16) is fixed to one end of the flow guide pipe (10) extending into the dust cover (9), and a plurality of diversion pipes (17) are fixed to the connecting pipe (16).

5. The raw material screening device for concrete preparation according to claim 4, characterized in that: A barrier net (25) is fixed inside the diversion pipe (17).

6. The raw material screening device for concrete preparation according to claim 1, characterized in that: The shaking structure includes a connecting column (18) fixed to the lower ends of screen 1 (4) and screen 2 (5), a connecting block (20) is fixed inside the screening device body (1), the connecting column (18) slides through the connecting block (20), and a driving component is provided on the side of the screening device body (1).

7. The raw material screening device for concrete preparation according to claim 6, characterized in that: The driving assembly includes a second motor (21) fixed to the side of the screening device body (1), the output end of the second motor (21) is rotatably connected to the screening device body (1), a cam (22) is fixed to the output end of the second motor (21), and the lower end of the connecting column (18) is rotatably connected to a contact wheel (23), and the contact wheel (23) is in contact with the cam (22).

8. The raw material screening device for concrete preparation according to claim 7, characterized in that: The lower ends of the screen mesh 1 (4) and the screen mesh 2 (5) are both fixed with a return spring (19), and the lower ends of the return springs (19) are fixedly connected to the connecting block (20).

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