Low-noise vibration screening equipment for building construction

Abstract

The utility model relates to the technical field of building construction screening, and discloses low-noise vibration screening equipment for building construction, which comprises a processing bin, the top end of the processing bin is fixedly connected with a guide port, the inner wall of the guide port is fixedly connected with a filtering bin, and the bottom end of the inner wall of the processing bin is fixedly connected with a driving motor. The driving end of the driving motor is connected with a sealing ring through a screening set, the upper end and the lower end of the inner wall of the filtering bin are fixedly connected with fixing rings, the bottom ends of the fixing rings are fixedly connected with filtering nets, the inner sides of the fixing rings are connected with shifting plates through transmission sets, and the four sides of the inner wall of the processing bin are fixedly connected with fixing frames. The screening efficiency is improved, meanwhile, the problem that the screen is blocked is effectively solved, continuous and stable operation of equipment is guaranteed, the noise influence in the screening process is reduced, the stability of the equipment is improved, a quiet working environment is provided, noise pollution is reduced, and environmental protection benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of building construction screening technology, and in particular to a low-noise and low-vibration screening device for building construction. Background Technology

[0002] Screening is a crucial step in the construction process. Building materials such as sand, gravel, cement, and construction waste often need to be vibrated and screened before use to ensure that their particle size meets the construction requirements. For example, in concrete mixing, sand and gravel of different particle sizes have a significant impact on the strength and workability of concrete. Sand and gravel of appropriate particle size can ensure the quality of concrete and improve the durability and safety of buildings.

[0003] The materials to be screened usually have a complex particle size distribution. Some of the material particles have a diameter that is close to the diameter of the screen mesh. Ideally, these appropriately sized particles should be able to pass through the screen mesh smoothly. However, in the actual vibratory screening process, due to the irregularity of the particle shape, even if the diameter matches the screen mesh, they will get stuck in the screen mesh in a special posture. As more and more material adheres, the effective size of the screen mesh is gradually reduced, eventually leading to screen clogging and affecting the subsequent screening efficiency.

[0004] In response to this technical problem, this application proposes a screening device for building construction with low noise and vibration. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as material clogging the screen during vibration screening and excessive noise generated during vibration screening. The proposed invention provides a low-noise vibration screening device for construction, which improves screening efficiency, effectively avoids screen clogging, ensures continuous and stable operation of the equipment, reduces noise during screening, enhances equipment stability, provides a quiet working environment, reduces noise pollution, and has environmental benefits.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A low-noise, low-vibration screening device for building construction includes a processing chamber. A guide port is fixedly connected to the top of the processing chamber, and a filter chamber is fixedly connected to the inner wall of the guide port. A drive motor is fixedly connected to the bottom of the inner wall of the processing chamber. The drive end of the drive motor is connected to a sealing ring via a screening assembly. Fixed rings are fixedly connected to both the upper and lower ends of the inner wall of the filter chamber, and filter screens are fixedly connected to the bottom ends of each fixed ring. A toggle plate is connected to the inner side of each fixed ring via a transmission assembly. Fixed frames are fixedly connected to all four sides of the inner wall of the processing chamber. Sound-absorbing plates are slidably connected to the inner walls of each fixed frame via a sound-absorbing assembly. Fixed columns are fixedly connected to the four corners of the bottom of the processing chamber, and sliding groove columns are slidably connected to the bottom ends of each fixed column via a dispersion assembly.

[0008] Furthermore, the screening group includes a transmission rod fixedly connected to the drive end of the drive motor, and the inner wall of the sealing ring is fixedly connected to the upper and lower ends of the transmission rod body.

[0009] Furthermore, the transmission assembly includes an internal toothed ring fixedly connected to the inner diameter of the fixed ring, and an external toothed ring fixedly connected to the outer wall of the actuating plate. The external toothed ring and the internal toothed ring are meshed together.

[0010] Furthermore, each of the actuating plates has a connecting plate fixedly connected to its top, and the outer wall of each connecting plate is fixedly connected to the top of the sealing ring.

[0011] Furthermore, a conveying pipe is fixedly connected to the bottom of the filter chamber, the bottom of the conveying pipe is fixedly connected to the bottom of the inner wall of the processing chamber, and a discharge trough is fixedly connected to the bottom of the processing chamber.

[0012] Furthermore, the dispersion group includes two springs that are fixedly connected to the bottom end of the fixed column, and the other end of each spring is fixedly connected to the bottom end of the inner wall of the sliding column.

[0013] Furthermore, the sound-absorbing assembly includes a spring that is fixedly connected to both the upper and lower ends of the inner wall of the fixed frame, and the other end of the spring is fixedly connected to the outer wall of the sound-absorbing panel. The outer wall of the sound-absorbing panel is provided with a plurality of sound-absorbing holes.

[0014] Furthermore, rubber pads are fixedly connected to the bottom of each of the chute columns, and vibration motors are installed at both ends of the inner wall of the filter chamber.

[0015] This utility model has the following beneficial effects:

[0016] In this invention, a drive motor drives a transmission rod to rotate, and a sealing ring causes a rotating plate on the connecting plate to move in a circular motion. The outer toothed ring meshes with the inner toothed ring, driving the rotating plate to scrape off the material stuck on the filter screen and assist in stirring, ensuring smooth material flow. The filtered material is discharged into the discharge trough through a conveying pipe, improving screening efficiency and effectively avoiding screen clogging, thus ensuring the continuous and stable operation of the equipment.

[0017] In this invention, the sound-absorbing plate surface with sound-absorbing grooves connected by a fixed frame absorbs noise. Spring 1 works with the sound-absorbing plate to generate resonance, forming a resonant sound absorption effect, which effectively reduces noise propagation. The rubber pad is in contact with the ground to reduce contact. Spring 2 forms a buffer zone between the sliding column and the fixed column to reduce vibration transmission. This design significantly reduces the noise impact during the screening process, improves equipment stability, provides a quiet working environment, reduces noise pollution, and has environmental benefits. Attached Figure Description

[0018] Figure 1A perspective view of a low-noise and vibration screening device for building construction proposed in this utility model;

[0019] Figure 2 A half-sectional view of the processing chamber of a low-noise, vibration screening device for building construction proposed in this utility model;

[0020] Figure 3 A half-sectional view of the filter chamber of a low-noise and vibration screening device for building construction proposed in this utility model;

[0021] Figure 4 A half-sectional view of the filter screen of a low-noise and vibration screening device for building construction proposed in this utility model;

[0022] Figure 5 A half-sectional view of the grounding plate of a low-noise vibration screening device for building construction proposed in this utility model;

[0023] Figure 6 A cross-sectional view of the sealing ring of a low-noise, vibration screening device for building construction proposed in this utility model;

[0024] Figure 7 This is a half-sectional view of the chute column of a low-noise and vibration screening device for building construction proposed in this utility model;

[0025] Figure 8 This is a cross-sectional view of the sound-absorbing plate of a low-noise, vibration screening device for building construction proposed in this utility model.

[0026] Legend:

[0027] 1. Processing chamber; 2. Guide port; 3. Filter chamber; 4. Discharge trough; 5. Fixed column; 6. Sliding column; 7. Rubber pad; 8. Fixed ring; 9. Fixed frame; 10. Sound-absorbing panel; 11. Spring 1; 12. Filter screen; 13. Vibration motor; 14. Conveying pipe; 15. Drive motor; 16. Transmission rod; 17. Sealing ring; 18. Internal toothed ring; 19. External toothed ring; 20. Actuating plate; 21. Connecting plate; 22. Spring 2; 23. Dispersion group; 24. Sound-absorbing group; 25. Screening group; 26. Transmission group. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a low-noise, low-vibration screening device for building construction, comprising a processing chamber 1, a guide port 2 fixedly connected to the top of the processing chamber 1, a filter chamber 3 fixedly connected to the inner wall of the guide port 2, a drive motor 15 fixedly connected to the bottom of the inner wall of the processing chamber 1, a sealing ring 17 connected to the drive end of the drive motor 15 via a screening assembly 25, the screening assembly 25 including a transmission rod 16 fixedly connected to the drive end of the drive motor 15, the inner wall of the sealing ring 17 being fixedly connected to the upper and lower ends of the transmission rod 16, fixing rings 8 fixedly connected to the upper and lower ends of the inner wall of the filter chamber 3, filter screens 12 fixedly connected to the bottom of each fixing ring 8, and a toggle plate 20 connected to the inner side of the fixing ring 8 via a transmission assembly 26, for reference. Figure 5 and Figure 6 The transmission assembly 26 includes an internal gear ring 18 fixedly connected to the inner diameter of the fixed ring 8, an external gear ring 19 fixedly connected to the outer wall of the actuating plate 20, and the external gear ring 19 and the internal gear ring 18 being meshed. A connecting plate 21 is fixedly connected to the top of the actuating plate 20, and the outer wall of the connecting plate 21 is fixedly connected to the top of the sealing ring 17. A conveying pipe 14 is fixedly connected to the bottom of the filter chamber 3, and the bottom of the conveying pipe 14 is fixedly connected to the bottom of the inner wall of the processing chamber 1. A discharge trough 4 is fixedly connected to the bottom of the processing chamber 1.

[0030] Specifically: When the material enters the filter chamber 3 through the guide port 2, the vibration motor 13 starts immediately and transmits high-frequency vibration to the metal shell of the filter chamber 3 through the rigid connector. This drives the multi-layer filter screen 12 fixed by the fixing ring 8 to generate three-dimensional composite vibration, so that the material accumulated on the surface of the filter screen 12 can achieve layered screening under the synergistic effect of vertical vibration and horizontal swing. The synchronously started drive motor 15 drives the transmission rod 16 to rotate at a speed of 60 r / min through the reduction gearbox. The end of the transmission rod 16 forms a dynamic coupling with the connecting plate 21 through the axial limiting mechanism of the sealing ring 17, which drives two sets of 90° symmetrically distributed actuating plates 20 to make uniform circular motion with a radius of 300 mm. During this process, the internal gear ring 18 fixed to the frame and the external gear ring 19 at the bottom of the actuating plate 20 form a precision planetary gear transmission pair, driving each actuating plate 20 to generate a rotation speed of 25 r / min while revolving. The polyurethane scraper welded on its surface is close to the surface of the filter screen 12 with a gap of 5 mm, forming a spiral propulsion cleaning action. This composite motion mode enables the elastic scraper of the agitator plate 20 to effectively peel off materials with a critical particle size of 2.5-8.2mm that are stuck in the 12-hole slot of the filter screen with a diameter of Φ3-8mm. At the same time, the centrifugal force field of about 0.5G generated by its rotation dynamically tumbles and throws the material layer, thereby improving the fluidization index of the material. The qualified material after optimization screening enters the buffer chamber of the discharge tank 4 at a flow rate of 15kg / s through the 45° inclined conveying pipe 14 under the dual action of vibration transmission and mechanical agitation. This significantly improves the screening efficiency and effectively avoids the problem of screen clogging, ensuring the continuous and stable operation of the equipment.

[0031] Reference Figure 2 , Figure 7 and Figure 8 The processing chamber 1 has four fixed frames 9 on its inner walls. The inner walls of the fixed frames 9 are slidably connected to the sound-absorbing panels 10 via the sound-absorbing group 24. The dispersion group 23 includes springs 22 fixedly connected to the bottom of the fixed columns 5. The other end of each spring 22 is fixedly connected to the bottom of the inner wall of the slide column 6. The four corners of the bottom of the processing chamber 1 are fixedly connected to the fixed columns 5. The bottom of each fixed column 5 is slidably connected to the slide column 6 via the dispersion group 23. The sound-absorbing group 24 includes springs 11 fixedly connected to the upper and lower ends of the inner walls of the fixed frames 9. The other end of each spring 11 is fixedly connected to the outer wall of the sound-absorbing panel 10. The outer wall of the sound-absorbing panel 10 is provided with several sound-absorbing holes. The bottom of each slide column 6 is fixedly connected to a rubber pad 7. Vibration motors 13 are installed on the left and right ends of the inner walls of the filter chamber 3.

[0032] Specifically: When the vibration motor 13 drives the filter chamber 3 at a speed of 2800 r / min to perform vibration screening, the 105 dB high-frequency noise generated in the filter chamber 3 first acts on the double-layer sound-absorbing plate 10 at the fixed frame 9. The surface of the plate has Φ2 mm sound-absorbing slots arranged in a hexagonal honeycomb array, with a slot depth of 15 mm and a spacing of 15 mm. The sound-absorbing plate 10, made of porous aluminum honeycomb composite material, can absorb 68% of broadband noise through the cavity Helmholtz resonance principle. At the same time, eight sets of springs 11 with a stiffness coefficient of 50 N / mm form an elastic connection between the sound-absorbing plate 10 and the fixed frame 9. When the noise causes the sound-absorbing plate 10 to produce forced vibration with an amplitude of ±0.8 mm, the system's natural frequency and the main noise frequency band form impedance matching, achieving a resonance sound absorption efficiency of up to 82%, which is beneficial for equipment foundation vibration reduction. The high-damping rubber pad 7, with a thickness of 30mm, has a Shore hardness of 60HA and a density of 1.2g / cm³. The high-damping rubber pad 7 forms a non-linear contact interface with the ground. Combined with a buffer system consisting of four sets of springs 22 with a stiffness coefficient of 80N / mm, a 2mm gap is maintained between the sliding column 6 and the fixed column 5, which is filled with a silicon-based lubricating medium. This successfully controls the vibration transmission rate of the equipment to below 15%. Through the synergistic effect of structural sound absorption and mechanical vibration isolation, this composite noise reduction system reduces the overall operating noise of the machine from 105dB to below 75dB. At the same time, it reduces the transmission force of equipment vibration to the building structure to 0.5N / mm², ensuring that the screening operation complies with the GB12348-2008 industrial enterprise boundary noise emission standard, and significantly improves the comfort of the working environment and the stability of equipment operation.

[0033] Working principle: When the material flows from the guide port 2 into the filter chamber 3, the vibration motor 13 starts and transmits vibration to the filter chamber 3, thereby vibrating and screening the material at the filter screen 12 connected to the fixed ring 8 in the filter chamber 3. When the drive motor 15 starts and drives the transmission rod 16 to rotate, the transmission rod 16 drives the actuating plate 20 connected to the connecting plate 21 to perform circumferential motion through the sealing ring 17. When the actuating plate 20 rotates, the external toothed ring 19, in the meshing state with the internal toothed ring 18, drives the actuating plate 20 to rotate, thereby causing the actuating plate 20 to agitate the material on the surface of the filter screen 12, scraping out the material stuck at the filter screen 12, and assisting in agitating the material at the filter screen 12, making the material flow more smoothly and maintaining the filtration effect. The filtered material flows through the conveying pipe 14 to the discharge tank 4 for discharge.

[0034] During the vibration screening process of the vibrating motor 13, the noise generated in the filter chamber 3 is absorbed by the sound-absorbing plate 10 connected to the fixed frame 9. The multiple sound-absorbing holes and grooves on the surface of the sound-absorbing plate 10 absorb the noise. The spring 11, in conjunction with the vibration of the sound-absorbing plate 10, causes the sound-absorbing plate 10 to resonate, resulting in resonance sound absorption between the sound-absorbing plate 10 and the noise, reducing the noise propagation of the filter chamber 3. The rubber pad 7 is in contact with the ground, reducing contact with the ground. Under the elastic force generated by the spring 22, a buffer zone is formed between the sliding column 6 and the fixed column 5, reducing the vibration generated by the device from being transmitted to the outside, and reducing the noise impact generated by the device during the entire screening process.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-noise, low-vibration screening device for building construction, comprising a processing chamber (1), characterized in that: The top of the processing chamber (1) is fixedly connected to a guide port (2), the inner wall of the guide port (2) is fixedly connected to a filter chamber (3), the bottom of the inner wall of the processing chamber (1) is fixedly connected to a drive motor (15), the drive end of the drive motor (15) is connected to a sealing ring (17) through a screening group (25), the upper and lower ends of the inner wall of the filter chamber (3) are fixedly connected to a fixing ring (8), the bottom end of the fixing ring (8) is fixedly connected to a filter screen (12), the inner side of the fixing ring (8) is connected to a toggle plate (20) through a transmission group (26), the four sides of the inner wall of the processing chamber (1) are fixedly connected to a fixing frame (9), the inner wall of the fixing frame (9) is slidably connected to a sound-absorbing plate (10) through a sound-absorbing group (24), the four corners of the bottom of the processing chamber (1) are fixedly connected to a fixing column (5), the bottom end of the fixing column (5) is slidably connected to a chute column (6) through a dispersion group (23).

2. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: The screening group (25) includes a transmission rod (16) fixedly connected to the drive end of the drive motor (15), and the inner wall of the sealing ring (17) is fixedly connected to the upper and lower ends of the transmission rod (16).

3. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: The transmission assembly (26) includes an internal toothed ring (18) fixedly connected to the inner diameter of the fixed ring (8), and an external toothed ring (19) fixedly connected to the outer wall of the actuating plate (20). The external toothed ring (19) and the internal toothed ring (18) are meshed together.

4. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: Each of the toggle plates (20) has a connecting plate (21) fixedly connected to its top end, and the outer wall of the connecting plate (21) is fixedly connected to the top end of the sealing ring (17).

5. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: The bottom of the filter chamber (3) is fixedly connected to a conveying pipe (14), the bottom of the conveying pipe (14) is fixedly connected to the bottom of the inner wall of the processing chamber (1), and the bottom of the processing chamber (1) is fixedly connected to a discharge trough (4).

6. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: The dispersion group (23) includes two springs (22) that are fixedly connected to the bottom of the fixed column (5), and the other end of each spring (22) is fixedly connected to the bottom of the inner wall of the sliding column (6).

7. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: The sound-absorbing group (24) includes a spring (11) that is fixedly connected to both the upper and lower ends of the inner wall of the fixed frame (9). The other end of the spring (11) is fixedly connected to the outer wall of the sound-absorbing plate (10). The outer wall of the sound-absorbing plate (10) is provided with a number of sound-absorbing holes.

8. The low-noise, vibration screening equipment for building construction according to claim 1, characterized in that: The bottom of each of the sliding column (6) is fixedly connected with a rubber pad (7), and the left and right ends of the inner wall of the filter chamber (3) are each equipped with a vibration motor (13).

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