Gravel material screening system
The combination of a multi-stage screening device and a sand washing machine solves the problem of loss of medium and coarse sand during sand and gravel washing, achieving efficient utilization of resources and cost savings.
Patent Information
- Application Number
- CN202422245035.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-09-12
AI Technical Summary
In the prior art, during the sand and gravel washing process, medium and coarse sand is carried away by the water flow, resulting in material waste and increased production costs.
A sand and gravel screening system is designed, including a multi-stage screening device and a sand washing machine. The multi-stage screening mechanism is used for step-by-step screening to reduce the amount of medium and coarse sand entering the sand washing machine, and the screening process is optimized through the spray pipe and transportation device.
It effectively reduces the loss of medium and coarse sand, saves industrial production costs, and improves screening efficiency and resource utilization.
Smart Images
Figure CN223381760U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand and gravel screening, in particular to a sand and gravel screening system. Background Art
[0002] In the prior art, sand and gravel need to be washed with water. This process uses the force of water to wash away dirt and fine particles on the surface of the sand and gravel, thereby achieving the purpose of cleaning. In this process, the water flow not only washes away fine dirt particles, but also some lighter medium and coarse sand particles. As a result, the medium and coarse sand is washed away by the water flow and cannot be effectively recovered, resulting in material waste of sand and gravel and increasing industrial production costs. Utility Model Content
[0003] The main purpose of the utility model is to provide a sand and gravel screening system, which aims to reduce the amount of medium and coarse sand carried away by water flow, avoid the waste of sand and gravel, and save industrial production costs.
[0004] To achieve the above-mentioned purpose, the present invention proposes a sand and gravel screening system, comprising:
[0005] Sand washing machines; and,
[0006] A multi-stage screening device comprises at least a first screening mechanism, a second screening mechanism and a third screening mechanism arranged in sequence along the production direction, wherein the sieve apertures decrease in sequence from the first screening mechanism, the second screening mechanism to the third screening mechanism; wherein,
[0007] The first screening mechanism has multiple discharging ends, one of which is connected to the feed end of the second screening mechanism, another of which outputs the sand and gravel on the screen into a designated position, and another of which is connected to the feed end of the sand washing machine; the second screening mechanism has multiple discharging ends, one of which outputs the sand and gravel on the screen into a designated position, and another of which is connected to the feed end of the sand washing machine; the discharge end of the sand washing machine is connected to the feed end of the third screening mechanism.
[0008] In one embodiment, the multi-stage screening device also includes a pre-screening mechanism, which has two discharge ends, one of which is connected to a designated position of the oversize sand and gravel material for placing the oversize sand and gravel material, and the other discharge end is connected to the feed end of the first screening mechanism for transporting the undersize sand and gravel material to the first screening mechanism.
[0009] In one embodiment, the sand and gravel screening system further includes a feeding hopper, the discharge end of the feeding hopper is connected to the feed end of the pre-screening mechanism, and the height of the discharge end is greater than the height of the feed end of the pre-screening mechanism.
[0010] In one embodiment, the sand and gravel screening system also includes a multi-stage transportation device, which includes multiple transportation mechanisms corresponding to the first screening mechanism and the second screening mechanism, the first screening mechanism and the sand washing machine, the second screening mechanism and the sand washing machine, and the sand washing machine and the third screening mechanism. The multiple transportation mechanisms are used to transport sand and gravel along the production direction.
[0011] In one embodiment, the transport mechanism comprises a conveyor belt or a chute.
[0012] In one embodiment, the height of the feed end of the conveyor belt is smaller than the height of the discharge end; and / or,
[0013] The height of the feed end of the chute is greater than the height of the discharge end.
[0014] In one embodiment, the sand and gravel screening system further includes a dewatering screen, the discharge end of the third screening mechanism is connected to the feed end of the dewatering screen, and the dewatering screen is used to dewater the sand and gravel underscreen of the third screening mechanism.
[0015] In one embodiment, the sand and gravel screening system further includes a sand and gravel recovery device, wherein the feed end of the sand and gravel recovery device is connected to the wastewater outlet of the sand washing machine, and the discharge end thereof is connected to the dewatering screen.
[0016] In one embodiment, the multi-stage screening device also includes a plurality of spray pipes arranged on the first screening mechanism, the second screening mechanism, and the third screening mechanism, and the plurality of spray pipes are used to spray high-pressure water onto mixed sand and gravel materials of different particle sizes on the corresponding screening mechanisms.
[0017] In one embodiment, the multi-stage screening device also includes a parallel screening mechanism arranged in parallel with the first screening mechanism, and the parallel screening mechanism has multiple discharge ends, one of which is connected to the feed end of the second screening mechanism, another of which outputs the screened sand and gravel into a designated position, and another of which is connected to the feed end of the sand washing machine.
[0018] The technical solution of the utility model transports the sand and gravel on the screen of the first screening mechanism to the second screening mechanism, so that the sand and gravel with medium and coarse particle size can be screened once more, thereby reducing the sand and gravel with medium and coarse particle size that finally enters the sand washing machine, thereby reducing the medium and coarse sand being washed away by the water flow, reducing the waste of sand and gravel, and saving industrial production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0020] Figure 1 This is a structural diagram of an embodiment of a sand and gravel screening system provided by the present utility model;
[0021] Figure 2 for Figure 1 Left view in;
[0022] Figure 3 for Figure 1 Right view in .
[0023] Description of Figure Numbers:
[0024] 100. Sand and gravel screening system;
[0025] 1. Multi-stage screening device; 11. First screening mechanism; 12. Second screening mechanism; 13. Third screening mechanism; 14. Pre-screening mechanism; 15. Parallel screening mechanism;
[0026] 2. Sand washing machine;
[0027] 3. Feed hopper;
[0028] 4. Multi-stage transport device; 41. Transport mechanism; 411. Conveyor belt; 412. Chute;
[0029] 5. Dewatering screen.
[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.
[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0034] like Figure 1 As shown, the utility model proposes a sand and gravel screening system 100, including a sand washing machine 2 and a multi-stage screening device 1, the multi-stage screening device 1 includes a first screening mechanism 11, a second screening mechanism 12 and a third screening mechanism 13 arranged in sequence along at least the production direction, and the screen apertures of the first screening mechanism 11, the second screening mechanism 12 to the third screening mechanism 13 decrease in sequence; wherein, the first screening mechanism 11 has multiple discharging ends, one of which is connected to the feed end of the second screening mechanism 12, and the other discharging end outputs the screened sand and gravel into a designated position, and another discharging end is connected to the feed end of the sand washing machine 2; the second screening mechanism 12 has multiple discharging ends, one of which outputs the screened sand and gravel into a designated position, and the other discharging end is connected to the feed end of the sand washing machine 2; the discharge end of the sand washing machine 2 is connected to the feed end of the third screening mechanism 13.
[0035] The technical solution of the present invention transports the screened sand and gravel of the first screening mechanism 11 to the second screening mechanism 12, so that the sand and gravel with medium and coarse particle size can be screened once more, thereby reducing the sand and gravel with medium and coarse particle size that finally enters the sand washing machine 2, thereby reducing the amount of medium and coarse sand carried away by water flow and lost, avoiding the waste of sand and gravel, and saving industrial production costs.
[0036] It should be noted here that transporting the undersize sand and gravel of the first screening mechanism 11 and the undersize sand and gravel of the second screening mechanism 12 to the sand washing machine 2 can also avoid wasting sand and gravel with smaller particle size, further reduce the waste of sand and gravel, and save industrial production costs.
[0037] In one embodiment, the multi-stage screening device 1 also includes a pre-screening mechanism 14, which has two discharge ends, one of which is connected to a designated position of the oversize sand and gravel material for placing the oversize sand and gravel, and the other discharge end is connected to the feed end of the first screening mechanism 11 for transporting the undersize sand and gravel to the first screening mechanism 11.
[0038] It is understood that the pre-screening mechanism 14 removes oversized particles or coarse particles that do not meet the requirements of the final product. The screen is designed with a large aperture to ensure that the oversized sand and gravel that exceeds the required particle size range is screened out, thereby preventing the oversized sand and gravel from impacting and damaging the subsequent screens. The remaining undersized sand and gravel enter the first screening mechanism 11 for further fine screening.
[0039] like Figure 2 As shown, in one embodiment, the sand and gravel screening system 100 further includes a feeding hopper 3 , the discharge end of the feeding hopper 3 is connected to the feed end of the pre-screening mechanism 14 , and the height of the discharge end is greater than the height of the feed end of the pre-screening mechanism 14 .
[0040] It can be understood that the height of the discharge end of the feed hopper 3 is greater than the height of the feed end of the pre-screening mechanism 14. Such a design can utilize the effect of gravity to make the material have a certain descending speed when entering the pre-screening mechanism 14, which helps to disperse the sand and gravel and reduce agglomeration, thereby improving the screening efficiency and screening quality.
[0041] In one embodiment, the feeding hopper 3 is arranged below the ground, and its feed port is arranged at an inclination, with the side at the lowest point of the inclination at the same height as the ground.
[0042] It will be appreciated that the lowest point of the feed opening is at ground level, allowing a loader or other feeding equipment to directly feed a mixture of sand and gravel of varying particle sizes into the feed hopper 3 without the need for additional lifts or ramps, simplifying material input and reducing energy consumption and operational complexity. Furthermore, the inclined feed opening facilitates the natural descent of sand and gravel into the feed hopper 3 under the influence of gravity, reducing the risk of material accumulation and blockage, and improving the smoothness and efficiency of feeding.
[0043] It should be noted here that since dust and sand and gravel with smaller particles will be raised when pouring in, the other sides of the feed hopper are higher than the ground, which can effectively block the dust and sand and gravel from being raised, and maintain a good ground working environment.
[0044] In one embodiment, the sand and gravel screening system 100 also includes a multi-stage transportation device 4, which includes multiple transportation mechanisms 41 corresponding to the first screening mechanism 11 and the second screening mechanism 12, between the first screening mechanism 11 and the sand washing machine 3, between the second screening mechanism 12 and the sand washing machine 2, and between the sand washing machine 2 and the third screening mechanism 13. The multiple transportation mechanisms 41 are used to transport sand and gravel along the production direction.
[0045] It can be understood that by installing multiple transport mechanisms 41 at the discharge end of each mechanism, the overscreen sand and gravel and underscreen sand and gravel at the discharge end of each mechanism can operate normally according to the direction of the production line, ensuring the smooth flow of sand and gravel and the accuracy of grading, thereby improving production efficiency.
[0046] The selection and design of the transport mechanism 41 can be flexibly adjusted according to the properties of the sand and gravel, processing requirements and site conditions. Specifically, in one embodiment, the transport mechanism 41 includes a conveyor belt 411 or a chute 412.
[0047] It is understood that conveyor belt 411 is suitable for conveying solid materials, particularly dry or semi-dry gravel. Conveyor belt 411 can be arranged horizontally, inclined, or curved to suit the production line layout, offering high flexibility and enabling stable and continuous transport of oversize (i.e., large particles that have not passed through the screen) and gravel to designated storage or reprocessing areas. This helps maintain a clean production site and improves operational efficiency.
[0048] Chute 412 is an effective conveying method for applications involving water washing or wet screening. It utilizes the natural slope of water flow, allowing the water-laden undersize (fine particles) and gravel to slide down the slope to the next screening stage. This not only effectively transports the material, but also facilitates further cleaning and grading, particularly when handling viscous or easily agglomerated materials. Furthermore, chute 412 is relatively simple in structure and has low maintenance costs, making it suitable for use under specific conditions.
[0049] The combined use of conveyor belt 411 and chute 412 not only takes into account the processing requirements of different material characteristics, but also takes into account the continuity and efficiency of the entire screening process, which is a key guarantee for achieving efficient material classification and processing. By rationally configuring conveyor belt 411 and chute 412, the production process can be optimized to the greatest extent, intermediate processing links can be reduced, and overall production efficiency and product quality can be improved.
[0050] In one embodiment, the height of the feed end of the conveyor belt 411 is smaller than the height of the discharge end; and / or the height of the feed end of the chute 412 is larger than the height of the discharge end.
[0051] It can be understood that the active transportation of the conveyor belt 411 increases the height, provides the sand and gravel with gravitational potential energy so that it can automatically fall in the next screening mechanism, and the passive transportation of the chute 412 guides the screened material into the corresponding position without the need for other auxiliary drives, thereby converting the gravitational potential energy of the sand and gravel into kinetic energy, which not only improves the efficiency of the entire sand and gravel processing system, but also reduces operating costs and energy consumption.
[0052] In one embodiment, the sand and gravel screening system 100 further includes a dewatering screen 5 . The discharge end of the third screening mechanism 13 is connected to the feed end of the dewatering screen 5 . The dewatering screen 5 is used to dewater the sand and gravel underscreen of the third screening mechanism 13 .
[0053] It is understood that the sand and gravel material under the sieve of the third screening mechanism 13 can be dehydrated by the dehydration screen 5. Dehydration can significantly reduce the moisture content in the sand and gravel material, reduce its weight, facilitate storage and transportation, and reduce logistics costs. In addition, the dehydration process can be carried out in a variety of ways, such as mechanical dehydration (such as the dehydration screen 5 equipped with a vibrating screen), centrifugal dehydration, or the use of a dryer. The appropriate dehydration method can be selected according to the characteristics of the sand and gravel material, production requirements, site conditions, and cost-effectiveness.
[0054] In one embodiment, the sand and gravel screening system further includes a sand and gravel recovery device, the feed end of the sand and gravel recovery device is connected to the wastewater outlet of the sand washing machine 3, and the discharge end outputs the screened sand and gravel into a designated location.
[0055] It is understood that after the wastewater is discharged from the sand washing machine 3, it flows directly to the feed end of the sand and gravel recovery device. Inside the sand and gravel recovery device, a vibrating screen or cyclone can be used to separate the sand and gravel particles in the wastewater. The clean wastewater after separation can be further processed or discharged, and the separated oversize (i.e., sand and gravel with larger particle size) is transported to the dehydration and drying end through the discharge end. After drying, it can be further screened as needed or can be directly used as a finished product.
[0056] In this way, not only can valuable sand and gravel resources be effectively recovered, but the cost and complexity of subsequent wastewater treatment can also be reduced.
[0057] In one embodiment, the multi-stage screening device 1 further includes a plurality of spray pipes arranged on the first screening mechanism 11, the second screening mechanism 12, and the third screening mechanism 13, and the plurality of spray pipes are used to spray high-pressure water onto the mixed sand and gravel materials of different particle sizes on the corresponding screening mechanisms.
[0058] It can be understood that high-pressure water is ejected through multiple spray pipes to flush sand and gravel of different particle sizes in different screening stages on the production line, thereby improving the cleanliness of the screened sand and gravel.
[0059] like Figure 3 As shown, in one embodiment, the multi-stage screening device 1 also includes a parallel screening mechanism 15 arranged in parallel with the first screening mechanism 11, and the parallel screening mechanism 15 has multiple discharge ends. The parallel screening mechanism 15 has multiple discharge ends, one of which is connected to the feed end of the second screening mechanism 12, and another of which outputs the screened sand and gravel into a designated position, and another of which is connected to the feed end of the sand washing machine 2.
[0060] It is understood that the parallel screening mechanism 15 and the first screening mechanism 11 can independently or in parallel screen mixed sand and gravel materials containing different particle sizes, thereby improving production flexibility. Screening for specific particle size ranges can be performed simultaneously or separately, significantly improving processing capacity and enhancing the flexibility of the entire screening process.
[0061] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A sand and gravel screening system, characterized in that: include: Sand washing machine; as well as, A multi-stage screening device comprises at least a first screening mechanism, a second screening mechanism and a third screening mechanism arranged in sequence along the production direction, wherein the sieve apertures decrease in sequence from the first screening mechanism, the second screening mechanism to the third screening mechanism; wherein, The first screening mechanism has multiple discharging ends, one of which is connected to the feed end of the second screening mechanism, another of which outputs the sand and gravel on the screen into a designated position, and another of which is connected to the feed end of the sand washing machine; the second screening mechanism has multiple discharging ends, one of which outputs the sand and gravel on the screen into a designated position, and another of which is connected to the feed end of the sand washing machine; the discharge end of the sand washing machine is connected to the feed end of the third screening mechanism.
2. The sand and gravel screening system according to claim 1, characterized in that: The multi-stage screening device also includes a pre-screening mechanism, which has two discharge ends, one of which is connected to a designated position of the oversize sand and gravel material for placing the oversize sand and gravel material, and the other discharge end is connected to the feed end of the first screening mechanism for transporting the undersize sand and gravel material to the first screening mechanism.
3. The sand and gravel screening system according to claim 2, characterized in that: The sand and gravel screening system also includes a feeding hopper, the discharge end of the feeding hopper is connected to the feed end of the pre-screening mechanism, and the height of the discharge end is greater than the height of the feed end of the pre-screening mechanism.
4. The sand and gravel screening system according to claim 1, characterized in that: The sand and gravel screening system also includes a multi-stage transportation device, which includes multiple transportation mechanisms corresponding to the first screening mechanism and the second screening mechanism, the first screening mechanism and the sand washing machine, the second screening mechanism and the sand washing machine, and the sand washing machine and the third screening mechanism. The multiple transportation mechanisms are used to transport sand and gravel along the production direction.
5. The sand and gravel screening system according to claim 4, characterized in that: The transport mechanism includes a transport belt or a chute.
6. The sand and gravel screening system according to claim 5, characterized in that: The height of the feed end of the conveyor belt is smaller than the height of the discharge end; and / or, The height of the feed end of the chute is greater than the height of the discharge end.
7. The sand and gravel screening system according to claim 1, characterized in that: The sand and gravel screening system also includes a dewatering screen. The discharge end of the third screening mechanism is connected to the feed end of the dewatering screen. The dewatering screen is used to dewater the sand and gravel that pass through the third screening mechanism.
8. The sand and gravel screening system according to claim 7, characterized in that: The sand and gravel screening system also includes a sand and gravel recovery device, the feed end of the sand and gravel recovery device is connected to the wastewater outlet of the sand washing machine, and the discharge end thereof is connected to the dewatering screen.
9. The sand and gravel screening system according to claim 1, characterized in that: The multi-stage screening device also includes a plurality of spray pipes arranged on the first screening mechanism, the second screening mechanism, and the third screening mechanism, and the plurality of spray pipes are used to spray high-pressure water onto mixed sand and gravel materials of different particle sizes on the corresponding screening mechanisms.
10. The sand and gravel screening system according to claim 1, characterized in that: The multi-stage screening device further includes a parallel screening mechanism arranged in parallel with the first screening mechanism, and the parallel screening mechanism has multiple discharge ends, one of which is connected to the feed end of the second screening mechanism.