Screening-free winnowing machine
By designing a winnowing machine that eliminates the need for screening, and utilizing a combination of conveyor belts, variable frequency motors, and a blowing system, the problem of low efficiency in the classification of manufactured sand is solved. This achieves efficient sand and gravel separation, reduces production costs, and results in energy conservation and consumption reduction.
Patent Information
- Application Number
- CN202422813546.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In existing technologies, the classification efficiency of manufactured sand is low, and the screens of hammer crushers need to be replaced frequently, resulting in high production costs and making it impossible to achieve efficient sand classification.
The winnowing machine, which eliminates the need for screening, combines a conveyor belt, a variable frequency intelligent motor, a blowing system, and a spray dust removal device to achieve precise classification of mixed sand and gravel. It optimizes material separation using an air resistance calculation formula and combines intelligent control to separate coarse, medium, and fine sand and gravel.
It achieves efficient classification of mixed sand and gravel, reduces equipment maintenance and production costs, improves production efficiency, and achieves energy saving and consumption reduction.
Smart Images
Figure CN223530855U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of manufactured sand preparation technology, specifically to a winnowing machine that does not require screening. Background Technology
[0002] The production of manufactured sand is generally carried out in a complete production line, with equipment including vibrating feeders, crushers, sand making machines, vibrating screens, belt conveyors, sand washing machines, etc.
[0003] Currently, most mixed sand classification on the market is carried out by screening with vibrating screens and sand washing machines. The production line mainly consists of a conveyor feeder, a hammer crusher, and a sand and gravel winnowing machine without screening, with an output of 10-20 t / h. The vibrating feeder automatically feeds the material that meets the crushing requirements into the feeder.
[0004] A hammer crusher consists of a crusher housing, rotor, hammers, impact liners, and screen plates. It is mainly used in industries such as cement, chemical, power, and metallurgy for crushing medium-hardness materials. Materials with high hardness, such as granite, basalt, and pebbles, should be avoided as much as possible. Hammers need to be replaced very frequently. Hammer crushers can produce sand in a single pass, offering high efficiency. The electric motor drives the rotor to rotate at high speed. When material enters the crusher, it is immediately crushed by the impact of the high-speed rotating hammers. The crushed material then undergoes secondary crushing as it impacts the liners and grate bars inside the crusher housing due to the force of the hammers. Material smaller than the grate gaps is discharged through the gaps, while larger pieces continue to be impacted by the hammers within the crushing chamber until they meet the required particle size and are discharged through the grate gaps.
[0005] Hammer crushers can produce different types of sand by changing the screen. Generally, sand of 25mm or less can be formed in one step. However, the sand produced is mixed sand, which is used to classify the sand more efficiently.
[0006] There is currently no effective solution to the above problems. Utility Model Content
[0007] In view of the above-mentioned technical problems in related technologies, this utility model proposes a winnowing machine that eliminates the need for screening. It can accurately classify mixed sand through screening-free technology, thus overcoming the above-mentioned shortcomings of the prior art.
[0008] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:
[0009] A winnowing machine without screening includes a conveyor belt, which is inclined and has supports at the bottom of both ends. A material collection device is located at the upper part of the lower end of the conveyor belt, and a variable frequency intelligent motor is located at the lower part of the lower end of the conveyor belt. A blowing system is located at the lower part of the higher end of the conveyor belt, with the air outlet of the blowing system facing the rear end of the conveyor belt. A sand and gravel screening finished product area and a spray dust removal device are located behind the higher end of the conveyor belt.
[0010] Furthermore, guard plates are provided on both sides of the conveyor belt.
[0011] Furthermore, the conveyor belt is provided with belt spacers that are evenly spaced.
[0012] Furthermore, the receiving device is a box with openings at both the top and bottom.
[0013] Furthermore, the variable frequency intelligent motor is electrically connected to the conveyor belt.
[0014] Furthermore, the spray dust removal device includes a water tank, a motor, and a spray pipe. The spray pipe is located above the finished sand and gravel screening area, and the water tank and motor are located below the conveyor belt.
[0015] Furthermore, the blowing system is located at the top of the water tank.
[0016] Furthermore, both the spray dust removal device and the blowing system are connected to a power source.
[0017] The beneficial effects of this utility model are as follows: This utility model uses a conveyor belt to transport the crushed waste stone from the crusher to the receiving port of the receiving device. Driven by an intelligent variable frequency motor, the winnowing machine belt rotates rapidly. With the assistance of a blower, the mixed sand and gravel are winnowed. At the same time, the spray dust removal and blowing system are activated. Finally, the finished product is classified and collected. This device has a simple structure, is highly efficient and practical, and has low investment and maintenance costs, achieving the goal of energy saving and consumption reduction. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the winnowing machine without sieving according to an embodiment of the present invention. Figure 1 ;
[0020] Figure 2This is a schematic diagram of the structure of the winnowing machine without sieving according to an embodiment of the present invention. Figure 2 ;
[0021] Figure 3 This is a schematic diagram of the production line for the winnowing and sieving machine according to an embodiment of the present utility model;
[0022] Figure 4 This is a schematic diagram of the hammer crusher structure used in the production line of the winnowing and screening machine according to an embodiment of this utility model;
[0023] In the diagram: 1. Conveyor belt; 2. Variable frequency intelligent motor; 3. Spray dust removal device; 4. Belt spacer; 5. Blowing system; 6. Support frame; 7. Sand and gravel screening finished product area; 8. Material receiving device; 9. Guard plate; 10. Conveyor feeder; 11. Hammer crusher; 1101. Impact plate device; 1102. Upper shell A; 1103. Side liner; 1104. Impact plate device A; 1105. Impact plate; 1106. Upper shell B; 1107. Impact plate device B; 1108. Front liner device; 1109. Rotor assembly; 1110. Screen plate device; 1111. Lower shell; 12. Winnowing winnowing machine; 31. Water tank; 32. Spray pipe. Detailed Implementation
[0024] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.
[0025] like Figure 1-2 As shown in the embodiment of this utility model, a winnowing machine without screening includes a conveyor belt 1, which is inclined. Supports 6 are provided at the bottom of both ends of the conveyor belt 1. A material receiving device 8 is provided at the upper part of the lower end of the conveyor belt 1. A variable frequency intelligent motor 2 is provided at the lower part of the lower end of the conveyor belt 1. A blowing system 5 is provided at the lower part of the higher end of the conveyor belt 1. The air outlet of the blowing system 5 faces the rear end of the conveyor belt 1. A sand and gravel screening finished product area 7 and a spray dust removal device 3 are provided behind the higher end of the conveyor belt 1.
[0026] Both sides of the conveyor belt 1 are equipped with guard plates 9. The wear-resistant conveyor belt is V-shaped and made of wear-resistant rubber, ensuring no material leakage during conveying.
[0027] The conveyor belt 1 is equipped with evenly spaced belt spacers 4. Belt spacers: When the conveyor belt rotates rapidly, the spacers prevent the material from rolling back.
[0028] The receiving device 8 is a box with openings at both the top and bottom.
[0029] The variable frequency intelligent motor 2 is electrically connected to the conveyor belt 1. The variable frequency intelligent motor is speed-adjustable, allowing for speed adjustments based on the specific gravity of different raw materials.
[0030] Both the spray dust removal device 3 and the blowing system 5 are connected to a power source.
[0031] The spray dust removal device 3 includes a water tank 31, a motor, and a spray pipe 32. The spray pipe 32 is located above the finished sand and gravel screening area 7, while the water tank 31 and the motor are located below the conveyor belt 1. The blowing system 5 is located above the water tank 31. The water tank 31 and the motor are responsible for transporting liquid water to the pipe; the spray pipe 32 mainly uses an atomization system to convert the liquid water into a mist, which is then sprayed upwards. The water droplets contained in the spray liquid form moist microparticles in the dispersed air. These water droplets have a high surface tension and can adsorb particulate matter in the air, achieving a dust removal effect. The spray dust removal device is ready to use when connected to a power source and the water tank is filled with water. The spray device starts when the conveyor belt is working.
[0032] A blower system is a mechanical device that generates a large airflow. It draws in air, compresses or accelerates it, and then discharges the high-speed airflow. Working principle: When connected to a power source and the belt conveys sand and gravel, the blower system starts simultaneously. In this process, the crushed sand and gravel are dispersed further and screened more precisely.
[0033] The winnowing machine features a reinforced, adjustable, and sturdy support frame. The finished product area for sand and gravel screening classifies and collects fine, medium, and coarse sand and gravel. The receiving device is a crushed stone inlet.
[0034] To facilitate understanding of the above-mentioned technical solutions of this utility model, the following detailed description of the above-mentioned technical solutions of this utility model is provided through specific usage methods.
[0035] In practical use, according to the sand-making process of the winnowing machine without screening described in this utility model, the sand-making process is as follows: feeding with a vibrating feeder → crushing with a hammer crusher (mixed sand) → sorting by the winnowing machine without screening (coarse, medium, and fine) → collection by sorting. The hammer crusher can produce different types of sand by changing the screen. Generally, sand of 25mm or smaller can be formed in one pass. However, the resulting sand is mixed sand. To more efficiently classify the sand, the screening-free technology is adopted.
[0036] The sand and gravel winnowing machine, which does not require screening, separates materials into coarse, medium, and fine grades by intelligently controlling the speed of the belt.
[0037] The working principle of the sand and gravel winnowing machine without screening: Air resistance calculation formula:
[0038]
[0039] In the formula: C is the air resistance coefficient, which is usually an experimental value and is related to the characteristic area (windward area) of the object, the smoothness of the object and its overall shape;
[0040] ρ is the air density, which can be taken as 1.293 g / L for normal dry air, and can be monitored in the field under special conditions; S is the windward area of the object; V is the relative velocity between the object and the air.
[0041] As can be seen from the above formula, under normal circumstances, the magnitude of air resistance is directly proportional to the air resistance coefficient and the frontal area, and directly proportional to the square of the speed.
[0042] The working process of the sand and gravel winnowing machine without screening is as follows: the waste stone crushed by the crusher reaches the receiving port through the conveyor belt. Driven by the intelligent variable frequency motor, the winnowing machine belt rotates quickly. With the help of the blower, the mixed sand and gravel are winnowed. At the same time, the spray dust removal and blowing system are activated, and finally the finished product is classified and collected.
[0043] In summary, with the help of the above-mentioned technical solution of this utility model, the waste stone crushed by the crusher is conveyed to the receiving port of the receiving device by the conveyor belt. Under the drive of the intelligent variable frequency motor, the winnowing machine belt rotates rapidly. With the cooperation of the blowing system, the mixed sand and gravel are winnowed. At the same time, the spray dust removal device is activated to remove water mist dust and the blowing system is activated to blow air. Finally, the finished product is classified and collected. This device has a simple structure, is highly efficient and practical, and has low investment and maintenance costs, thus achieving the purpose of energy saving and consumption reduction.
[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 winnowing machine that eliminates the need for sieving, characterized in that, Includes a conveyor belt (1), which is inclined, with supports (6) at the bottom of both ends of the conveyor belt (1), a material receiving device (8) at the upper part of the lower end of the conveyor belt (1), a variable frequency intelligent motor (2) at the lower part of the lower end of the conveyor belt (1), a blowing system (5) at the lower part of the higher end of the conveyor belt (1), with the air outlet of the blowing system (5) facing the rear end of the conveyor belt (1), and a sand and gravel screening finished product area (7) and a spray dust removal device (3) at the rear of the higher end of the conveyor belt (1).
2. The winnowing and sieving machine according to claim 1, characterized in that, Both sides of the conveyor belt (1) are provided with guard plates (9).
3. The winnowing machine without sieving according to claim 1, characterized in that, The conveyor belt (1) is provided with belt spacers (4) that are evenly spaced.
4. The winnowing machine without sieving according to claim 1, characterized in that, The receiving device (8) is a box with openings at both the top and bottom.
5. The winnowing machine without sieving according to claim 1, characterized in that, The variable frequency intelligent motor (2) is electrically connected to the conveyor belt (1).
6. The winnowing machine without sieving according to claim 1, characterized in that, The spray dust removal device (3) includes a water tank (31), a motor and a spray pipe (32). The spray pipe (32) is located above the sand and gravel screening finished product area (7), and the water tank (31) and the motor are located below the conveyor belt (1).
7. The winnowing and sieving machine according to claim 6, characterized in that, The blowing system (5) is located on the upper part of the water tank (31).
8. The winnowing and sieving machine according to any one of claims 1-7, characterized in that, Both the spray dust removal device (3) and the blowing system (5) are connected to a power source.