Screening device for concrete raw materials
By incorporating an inclined screen cylinder and a pusher screw design, combined with soaking and gravity screening, the problem of removing deep impurities from manufactured sand is solved, achieving efficient cleaning and water resource recycling, thereby improving concrete quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINYI YIBEN BUILDING MATERIALS CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-21
AI Technical Summary
Existing methods for screening manufactured sand are ineffective at removing internal and deep impurities from aggregates, leading to a decline in concrete quality. At the same time, they result in low water resource utilization, high processing costs, and long production cycles.
The inclined screen cylinder and pusher screw are combined with the soaking and draining zone to remove stubborn sludge through soaking, friction and gravity screening, and the screw press dewatering machine realizes water resource recycling.
It significantly improves the cleanliness of manufactured sand, reduces mud content, enhances concrete quality, increases screening efficiency, reduces water waste, simplifies processing procedures, and lowers costs.
Smart Images
Figure CN224142450U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of concrete raw material processing technology, specifically relating to a screening device for concrete raw materials. Background Technology
[0002] Manufactured sand, as an important aggregate source for concrete, is gradually becoming a significant substitute for natural sand due to its large-scale production and controllable performance. Manufactured sand is typically produced through processes such as rock crushing and sand making. At rock quarry sites, the surface is often covered with a large amount of soil, and during mining, transportation, and processing, even more soil impurities are inevitably introduced. Furthermore, during rock crushing, soil in some tiny pores and cracks is exposed, further increasing the mud content of the manufactured sand. This makes the screening and washing of manufactured sand a crucial step in ensuring concrete quality.
[0003] Currently, common methods for screening manufactured sand often combine washing and screening to remove mud from the interior and surface of the sand. However, existing washing methods primarily involve rinsing, which is effective at removing lighter impurities adhering to the aggregate surface. But for impurities deep within the aggregate's pores and cracks, as well as stubborn sludge, rinsing is very ineffective. During rinsing, the strong impact of the water flow easily causes mud and water to splash, polluting the working environment and potentially splashing mud onto surrounding equipment, affecting its normal operation. Furthermore, the rinsed mud and water cannot be directly dumped; a separate dewatering process is required, which increases processing costs, prolongs the entire production cycle, and results in low water resource recovery rates.
[0004] Therefore, this utility model proposes a screening device for concrete raw materials. This device can not only conveniently remove stubborn sludge deep in the aggregate, but also accurately screen the aggregate during the washing process, effectively reducing the mud content. It can also facilitate water resource recycling while achieving efficient dewatering of mud and water. Utility Model Content
[0005] To achieve the above objectives, this utility model provides the following technical solution: a screening device for concrete raw materials, comprising a water tank, a washing zone on one side of the water tank, a draining zone on the other side of the water tank, a screen cylinder fixed inside the washing zone, screen holes evenly distributed on the wall of the screen cylinder, a pushing screw installed inside the screen cylinder, a reduction motor installed at one end of the pushing screw, a feed hopper fixed at one end of the screen cylinder, a discharge port at the other end of the screen cylinder, with one end of the discharge port located inside the draining zone, a sludge discharge port at the bottom of the water tank in the washing zone, a screw press dewatering machine installed at the bottom of the sludge discharge port, the sludge discharge port being connected to the feed port of the screw press dewatering machine, a rinsing pipe connected to the filter cylinder outlet of the screw press dewatering machine, and a screen cylinder connected to one end of the rinsing pipe.
[0006] In a preferred embodiment of this utility model, both the screen cylinder and the pusher screw are inclined, the feed hopper is located at the lowest point of the screen cylinder's inclination, and the discharge port is located at the highest point of the screen cylinder's inclination.
[0007] As a preferred embodiment of this utility model, one end of the rinsing pipe is connected to the outlet of the filter cylinder of the screw press dewatering machine, and the other end of the rinsing pipe is connected to the lowest inclined end of the screen cylinder.
[0008] As a preferred embodiment of this utility model, the flushing pipe is equipped with a delivery pump and a filter.
[0009] As a preferred technical solution of this utility model, a drainage grid is installed at the bottom of the drainage area, and a drain outlet is provided at the bottom of the water tank located in the drainage area.
[0010] As a preferred technical solution of this utility model, the water tank is provided with a discharge port on the side wall of the drainage area.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] (1) This utility model, through soaking and softening, as well as multi-directional collision and friction between the aggregate and various components inside the screen cylinder, can penetrate deep into the internal pores and cracks of the aggregate to completely remove stubborn sludge. Compared with traditional washing methods, it greatly improves the impurity removal rate, effectively reduces the mud content of manufactured sand, and thus significantly improves the quality of concrete. Through the screen cylinder and push screw, not only is efficient feeding and discharging achieved, but also sufficient movement path of the aggregate is ensured inside the screen cylinder, extending the washing and screening time, making the screening process more thorough and precise, and improving screening efficiency and quality.
[0013] (2) The clean water filtered by the screw press dewatering machine flows back to the lowest inclined end of the screen cylinder through the flushing pipe to rinse the newly entered aggregate, realizing the recycling of water resources and reducing water waste. The settled sludge enters the screw press dewatering machine through the sludge discharge port for pressing and dewatering, which effectively reduces the sludge moisture content, making it easier for subsequent treatment and disposal, and avoiding the high cost and long cycle problems caused by the need for separate treatment of mud and water in traditional methods. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0015] Figure 1 This is a cross-sectional structural diagram of the water tank in this utility model;
[0016] Figure 2 This is a cross-sectional structural diagram of the sieve cylinder in this utility model;
[0017] In the diagram: 1. Water tank; 2. Soaking and washing area; 3. Draining area; 4. Screen cylinder; 5. Screen holes; 6. Gear motor; 7. Feed hopper; 8. Discharge port; 9. Sludge discharge port; 10. Screw press dewatering machine; 11. Flushing pipe; 12. Conveyor pump; 13. Filter; 14. Draining grid; 15. Drain outlet; 16. Unloading port; 17. Push screw. Detailed Implementation
[0018] 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.
[0019] Example
[0020] Please see Figure 1-2The present invention provides the following technical solution: a screening device for concrete raw materials, including a water tank 1, a washing zone 2 on one side of the water tank 1, a draining zone 3 on the other side of the water tank 1, a screen cylinder 4 fixed inside the washing zone 2, screen holes 5 evenly opened on the wall of the screen cylinder 4, a pusher screw 17 installed inside the screen cylinder 4, a reduction motor 6 installed at one end of the pusher screw 17, a feed hopper 7 fixed at one end of the screen cylinder 4, a discharge port 8 opened at the other end of the screen cylinder 4, and one end of the discharge port 8 is placed inside the draining zone 3, a sludge discharge port 9 opened at the bottom of the water tank 1 in the washing zone 2, a screw press dewatering machine 10 installed at the bottom of the sludge discharge port 9, the sludge discharge port 9 and the feed port of the screw press dewatering machine 10 are connected, a flushing pipe 11 is connected to the filter cylinder outlet of the screw press dewatering machine 10, and one end of the flushing pipe 11 is connected to the screen cylinder 4.
[0021] In order to utilize gravity to assist in feeding and discharging, and to ensure that the aggregate has sufficient movement path within the screen cylinder 4 to fully realize the washing and screening process, in this embodiment, as a preferred technical solution of the present invention, both the screen cylinder 4 and the push screw 17 are inclined, the feed hopper 7 is located at the lowest point of the inclination of the screen cylinder 4, and the discharge port 8 is located at the highest point of the inclination of the screen cylinder 4.
[0022] In order to enable the clean water filtered by the screw press dewatering machine 10 to flow back to the starting end of the screen cylinder 4 and to preliminarily rinse the aggregate newly entering the screen cylinder 4, so as to achieve efficient recycling of water resources, in this embodiment, as a preferred technical solution of the present invention, one end of the rinsing pipe 11 is connected to the outlet of the filter cylinder of the screw press dewatering machine 10, and the other end of the rinsing pipe 11 is connected to the lowest inclined end of the screen cylinder 4.
[0023] In order to provide stable power for the water flow in the flushing pipe 11 and ensure its smooth return to the screen cylinder 4, while filtering out any impurities that may remain in the water and preventing secondary pollution to the aggregate, in this embodiment, as a preferred technical solution of the present invention, the flushing pipe 11 is equipped with a delivery pump 12 and a filter 13 respectively.
[0024] In order to achieve effective separation of aggregate and water in the drainage zone 3, intercept the aggregate and discharge the water through the drain outlet 15, thereby reducing the moisture content of the aggregate, in this embodiment, as a preferred technical solution of the present invention, a drainage grid 14 is installed at the bottom of the drainage zone 3, and a drain outlet 15 is provided at the bottom of the water tank 1 in the drainage zone 3.
[0025] In order to facilitate the convenient unloading of aggregates after dewatering from the screening device, improve unloading efficiency, and facilitate subsequent collection and transportation of aggregates, in this embodiment, as a preferred technical solution of the present invention, the water tank 1 is provided with a discharge port 16 on the side wall of the dewatering zone 3.
[0026] In summary, with the help of the above-described technical solution of this utility model,
[0027] The manufactured sand aggregate is conveyed into the screen cylinder 4 through the feed hopper 7. Since the screen cylinder 4 is inclined and the feed hopper 7 is located at the lowest point of the inclination of the screen cylinder 4, this design facilitates the aggregate to naturally enter the screen cylinder 4 under the action of gravity, preparing it for the subsequent washing and screening process.
[0028] Water is injected into the soaking zone 2 of the water tank 1. The manufactured sand aggregate is soaked in water inside the screen cylinder 4, which softens the sludge adhering to the surface of the aggregate. At the same time, the geared motor 6 starts, driving the push screw 17 to rotate. Since the push screw 17 is also inclined, its spiral blades gradually push the aggregate located at the bottom (lower inclination) of the screen cylinder 4 to the top (higher inclination) of the screen cylinder 4. During this process, the aggregate collides continuously with each other, with the inner wall of the screen cylinder 4, and with the spiral blades of the push screw 17. The friction generated by this multi-directional collision can effectively remove the softened sludge from the surface of the aggregate and further remove stubborn sludge deep into the pores and cracks, achieving deep cleaning of the aggregate. The cleaned sludge settles to the bottom of the soaking zone 2 under the action of gravity, passing through the evenly spaced sieve holes 5 on the wall of the screen cylinder 4.
[0029] The sludge settled at the bottom of the washing zone 2 enters the screw press dewatering machine 10 through the sludge discharge port 9. The screw press dewatering machine 10 utilizes the screw extrusion principle to press and dewater the sludge, reducing its moisture content for easier subsequent processing and disposal. During dewatering, water flowing from the filter cartridge outlet of the screw press dewatering machine 10 is transported to the screen cylinder 4 through the flushing pipe 11. The conveying pump 12 installed on the flushing pipe 11 provides power for the water flow, ensuring its smooth return to the screen cylinder 4 to rinse the newly entered aggregate. Simultaneously, the filter 13 filters the return water, removing residual impurities to ensure the water returning to the screen cylinder 4 is relatively clean, preventing secondary contamination of the aggregate. The returned water achieves water resource recycling, improving water resource utilization efficiency.
[0030] After being soaked, washed, and subjected to repeated collisions and friction, the aggregate, continuously propelled by the pusher screw 17, finally enters the draining zone 3 through the discharge port 8. In the draining zone 3, the aggregate first comes into contact with the draining grid 14. The draining grid 14 intercepts the aggregate, causing it to remain at the top of the draining zone 3, while surface water flows through the gaps in the draining grid 14 into the bottom of the draining zone 3 and is discharged through the drain outlet 15. This process achieves initial separation of the aggregate and water, reducing the moisture content of the aggregate and facilitating subsequent unloading operations.
[0031] After being drained, the aggregate is finally discharged from the screening device through the discharge port 16 located on the side wall of the draining zone 3 of the water tank 1, completing the entire screening and cleaning process. The discharge port 16 facilitates the collection and transportation of aggregate and improves the working efficiency of the device.
[0032] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0033] The above description is merely 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 screening device for raw materials of concrete, comprising a water tank (1), characterized in that: A soaking area (2) is provided on one side of the water tank (1), and a draining area (3) is provided on the other side of the water tank (1). A sieve cylinder (4) is fixed inside the soaking area (2) of the water tank (1). The sieve cylinder (4) has sieve holes (5) evenly distributed on its wall. A pusher screw (17) is installed inside the sieve cylinder (4). A geared motor (6) is installed at one end of the pusher screw (17). A feed hopper (7) is fixed at one end of the sieve cylinder (4), and a feed hopper (7) is opened at the other end of the sieve cylinder (4). The discharge port (8) is located inside the draining area (3). The water tank (1) is located at the bottom of the soaking area (2) and has a sludge discharge port (9). A screw press dewatering machine (10) is installed at the bottom of the sludge discharge port (9). The sludge discharge port (9) and the feed port of the screw press dewatering machine (10) are connected. The filter cartridge outlet of the screw press dewatering machine (10) is connected to a flushing pipe (11). One end of the flushing pipe (11) is connected to a screen cylinder (4).
2. A screening device for raw materials for concrete according to claim 1, characterized in that: The screen cylinder (4) and the push screw (17) are both inclined. The feed hopper (7) is located at the lowest point of the inclined screen cylinder (4), and the discharge port (8) is located at the highest point of the inclined screen cylinder (4).
3. A screening apparatus for raw concrete materials as claimed in claim 2, wherein: One end of the flushing pipe (11) is connected to the filter outlet of the screw press dewatering machine (10), and the other end of the flushing pipe (11) is connected to the lowest inclined end of the screen cylinder (4).
4. A screening apparatus for raw concrete materials as claimed in claim 3 wherein: The flushing pipe (11) is equipped with a delivery pump (12) and a filter (13).
5. A screening device for raw materials of concrete according to claim 1, characterized in that: The bottom of the drainage area (3) is equipped with a drainage grid (14), and the water tank (1) is located at the bottom of the drainage area (3) and has a drain outlet (15).
6. A screening apparatus for raw concrete materials as claimed in claim 5 wherein: The water tank (1) is located on the side wall of the drain area (3) and has a discharge port (16).