Totally-closed double-helix grading device

Abstract

The utility model belongs to the technical field of coal mine processing, and particularly relates to a totally-closed double-helix grading device which comprises a box body, an overflow plate is integrally and fixedly installed on one side of the top of the box body, first sliding grooves are formed in the front end and the rear end of one side of the overflow plate respectively, and a first baffle is jointly arranged in the two first sliding grooves in a sliding mode. An inclined block is integrally and fixedly installed at the center of the top of the first baffle, a second baffle is rotationally arranged on the inner wall of one side of the feeding groove, a second sliding groove is formed in one side of the second baffle, and a sliding rod is jointly and fixedly installed at the centers of the front end and the rear end in the second sliding groove; a first sliding block is arranged on the outer surface of the sliding rod and located in the second sliding groove in a sliding mode, and an ejector rod is rotationally arranged on one side of the first sliding block. According to the utility model, the height of one side of the overflow tank is controlled through the flow of particulate matters flowing out after grinding of the ball mill, so that the situation that the particulate grading quality is influenced by overflow of large particulate matters when the flow is too large is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of coal mining processing technology, specifically relating to a fully enclosed double-helix grading device. Background Technology

[0002] Coal grading is a crucial step in coal mining and subsequent processing. The particle size distribution of coal directly affects its application in different industrial fields. For example, in thermal power generation, coal with a suitable particle size can improve combustion efficiency, while in coal chemical industry, coal with a uniform particle size helps to stabilize chemical reactions. Therefore, particle size grading is required for all types of materials during the production process to ensure production quality.

[0003] Problems with existing technology:

[0004] In the current coal mine production and processing process, spiral classifiers are usually used to screen coal. The principle is that particles of different sizes have different settling velocities under the action of gravity, thus forming a preliminary stratification of particles according to particle size in the vertical direction. However, due to the different flow rates of particles after ball milling into the classifier, there may be a large amount of particles flowing into the classifier in a single batch. This causes the slurry in the classifier to rise rapidly, carrying larger particles out of the overflow plate, thus affecting the classification effect of the coal mine. Utility Model Content

[0005] The purpose of this invention is to provide a fully enclosed double-helix grading device that can control the height of one side of the overflow tank by controlling the flow rate of particles flowing out after grinding in a ball mill, thereby preventing large particles from overflowing and affecting the particle grading quality when the flow rate is too high.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A fully enclosed double-helix grading device includes a housing. An overflow plate is integrally fixedly installed on one side of the top of the housing. A sliding groove is provided at both the front and rear ends of one side of the overflow plate. A baffle is slidably arranged inside the two sliding grooves. An inclined block is integrally fixedly installed at the center of the top of the baffle. A sliding groove is provided at the bottom end of the inclined block. A feeding trough is fixedly installed at the rear end of one side of the housing. A baffle is rotatably arranged on the inner wall of one side of the feeding trough. A sliding groove is provided on one side of the baffle. A sliding rod is fixedly installed at the center of the front and rear ends inside the sliding groove. A slider is slidably arranged on the outer surface of the sliding rod inside the sliding groove. A top rod is rotatably arranged on one side of the slider. Springs are sleeved on the outer surface of the sliding rod at both the front and rear ends of the slider.

[0008] One end of the top rod is hinged to a slider two, which is slidably disposed inside the slide groove three.

[0009] A baffle plate three is fixedly installed on one side of the front end of the feeding trough, and the baffle plate three is inclined at a certain angle.

[0010] The box is equipped with embedded conveyor rollers, and one end of each of the two conveyor rollers is fixedly mounted with a pulley. A motor is fixedly mounted on one side of the box.

[0011] A support frame is hinged to one side of the bottom of the box, and a slide plate is slidably mounted on the top of the support frame. Connecting rods are hinged to both the front and rear ends of the slide plate. The top ends of the two connecting rods are rotatably mounted on one side of the bottom of the box. A winding wheel is rotatably mounted in the middle of one side of the support frame, and a second motor is fixedly mounted on the rear end of the winding wheel.

[0012] The technical effects achieved by this utility model are as follows:

[0013] In this invention, when classifying ground coal, the ground ore flows from the inside of the feeding trough into the bottom of one side of the mill. Larger particles are conveyed by the conveyor rollers to the bottom of the top and then into the ball mill. Smaller particles are located at a relatively high position in the water tank and flow out with the slurry from one of the baffles on one side. When a large batch flows out of the feeding trough, the second baffle rotates, and the first slider pushes the top rod, which in turn pushes the second slider along the inclined chute three to move the first baffle vertically. The height of the first baffle is flexibly adjusted according to the flow rate of the mineral particles, thereby preventing a large batch of mineral particles from being discharged into the overflow plate on one side of the mill, which would cause the slurry height to rise rapidly and cause some unqualified mineral particles to overflow, thus improving the quality of mineral classification. Attached Figure Description

[0014] Figure 1 This is an axonometric view provided by an embodiment of the present invention;

[0015] Figure 2 This is a partial structural schematic diagram provided by an embodiment of the present utility model;

[0016] Figure 3 This is provided by an embodiment of the present utility model. Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a half-sectional schematic diagram of the oblique block provided in an embodiment of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Box body; 2. Overflow plate; 3. Conveyor roller; 4. Pulley; 5. Motor 1; 6. Support frame; 7. Slide plate; 8. Connecting rod; 9. Winding wheel; 10. Motor 2; 11. Feed chute; 12. Baffle 1; 13. Slide 1; 14. Baffle 2; 15. Baffle 3; 16. Slide 2; 17. Slide rod; 18. Spring; 19. Slider 1; 20. Top rod; 21. Inclined block; 22. Slide 3; 23. Slider 2. Detailed Implementation

[0020] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0021] like Figures 1-4 As shown, a fully enclosed double-helix grading device includes a housing 1. A feeding trough 11 is fixedly installed at the rear end of one side of the housing 1. A baffle 14 is rotatably provided on the inner wall of one side of the feeding trough 11. A sliding groove 16 is provided on one side of the baffle 14. A sliding rod 17 is fixedly installed at the center of the front and rear ends inside the sliding groove 16. A slider 19 is slidably provided on the outer surface of the sliding rod 17 and inside the sliding groove 16. A top rod 20 is rotatably provided on one side of the slider 19. Springs 18 are sleeved on the outer surface of the sliding rod 17 and at both the front and rear ends of the slider 19.

[0022] See attached document Figure 2 and Figure 4 An overflow plate 2 is integrally fixedly installed on one side of the top of the box body 1. The front and rear ends of one side of the overflow plate 2 are provided with sliding grooves 13. A baffle 12 is slidably installed inside the two sliding grooves 13. An inclined block 21 is integrally fixedly installed at the center of the top of the baffle 12. A sliding groove 22 is provided at the bottom end of the inclined block 21. A slider 23 is hinged to one end of the top rod 20. The slider 23 is slidably installed inside the sliding groove 22.

[0023] According to the above structure, the ore after grinding in the ball mill flows from the feed trough 11 into the bottom of one side of the box 1, and is flushed by water pipes and falls into the overflow plate 2 on the top side of the box 1. Due to the different settling speeds of particles of different sizes under gravity, large particles settle faster and sink to the bottom of the trough more quickly, while small particles settle slower and remain in the slurry for a longer time, remaining at a relatively high position in the trough and flowing out with the slurry from the baffle 12 on one side. Large particles fall into the bottom of the box 1 and are conveyed by two conveyor rollers 3 and then transported back into the ball mill for grinding. When the flow rate of the granular minerals is large, a large number of particle frames and water flow towards the box 1. When the material flows in, it impacts the baffle 12, causing it to rotate. Then, when the push rod 20 is restricted by the side wall of the feeding trough 11, the slider 19 slides inside the slide groove 16 and squeezes the spring 18. At this time, the push rod 20 moves back and forth along the side wall of the feeding trough 11, thereby pushing the slider 23 to slide along the inclined slide groove 3 22. At this time, the baffle 12 moves back and forth vertically along the slide groove 13. The height of the baffle 12 can be flexibly adjusted according to the flow rate inside the feeding trough 11 to avoid the excessive flow and mass of mineral particles entering the overflow plate 2 on one side of the box 1, which would cause the slurry height to rise rapidly and cause some unqualified mineral particles to overflow from the baffle 12, thus improving the quality of mineral grading.

[0024] See attached document Figure 1 The box body 1 is internally fitted with a conveyor roller 3. One end of each of the two conveyor rollers 3 is fixedly mounted with a pulley 4. A motor 5 is fixedly mounted on one side of the box body 1. A baffle 15 is fixedly mounted on one side of the front end of the feeding trough 11. The baffle 15 is tilted at a certain angle. A support frame 6 is hinged to one side of the bottom of the box body 1. A slide plate 7 is slidably mounted on the top of the support frame 6. Connecting rods 8 are hinged to both the front and rear ends of the slide plate 7. The top ends of the two connecting rods 8 are rotatably mounted on one side of the bottom of the box body 1. A winding wheel 9 is rotatably mounted in the middle of one side of the support frame 6. A motor 10 is fixedly mounted on the rear end of the winding wheel 9.

[0025] According to the above structure, the motor 5 and the pulley 4 drive the two conveyor rollers 3 to rotate, so that the larger particles that settle faster settle to the bottom of the box 1 and are conveyed by the conveyor rollers 3 to the bottom of one side of the box 1 and then transported to the ball mill for grinding. The inclined baffle 15 facilitates the impact of the particles and water flow in the feed trough 11 on the baffle 14, which is conducive to the normal operation of the equipment. The motor 10 drives the winding wheel 9 to rotate, and then the steel wire rope pulls the slide plate 7 to slide on the top of the support frame 6, which is convenient for quickly adjusting the height of the box 1 and improving the grading efficiency according to the different sizes of particles.

[0026] The working principle of this utility model is as follows: The ore after being ground by the ball mill flows from the feeding trough 11 into the bottom end of one side of the box 1. The mineral particles are then washed and flowed through a water pipe and fall into the overflow plate 2 on the top side of the box 1. The motor 5 and pulley 4 drive two conveyor rollers 3 to rotate. Because particles of different sizes have different settling speeds under gravity, larger particles settle faster and reach the bottom of the trough more quickly, while smaller particles settle slower and remain in the slurry for a longer time, remaining at a relatively high position in the trough and flowing out with the slurry from the baffle 12 on one side. Larger mineral particles fall into the bottom end of the box 1 and are conveyed out by the two conveyor rollers 3 and transported back into the ball mill for further grinding. When the flow rate of the mineral particles is large... When a large number of particle frames and water flow into the box 1, they impact the baffle 12, causing it to rotate. Then, when the push rod 20 is restricted by the side wall of the feeding trough 11, the slider 19 slides inside the slide groove 16 and squeezes the spring 18. At this time, the push rod 20 moves back and forth along the side wall of the feeding trough 11, thereby pushing the slider 23 to slide along the inclined slide groove 22. At this time, the baffle 12 moves back and forth vertically along the slide groove 13. The height of the baffle 12 can be flexibly adjusted according to the flow rate inside the feeding trough 11 to avoid the excessive flow and mass of mineral particles entering the overflow plate 2 on one side of the box 1, which would cause the slurry height to rise rapidly and cause some unqualified mineral particles to overflow from the baffle 12, thus improving the quality of mineral grading.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A fully enclosed double-helix grading device, comprising a housing (1), characterized in that: An overflow plate (2) is integrally fixedly installed on one side of the top of the box (1). A sliding groove (13) is provided at both the front and rear ends of one side of the overflow plate (2). A baffle (12) is slidably installed inside both sliding grooves (13). An inclined block (21) is integrally fixedly installed at the center of the top of the baffle (12). A sliding groove (22) is provided at the bottom end of the inclined block (21). A feeding trough (11) is fixedly installed at the rear end of one side of the box (1). A baffle plate (14) is rotatably provided on the inner wall of the side. A sliding groove (16) is provided on one side of the baffle plate (14). A sliding rod (17) is fixedly installed at the center of the front and rear ends inside the sliding groove (16). A slider (19) is slidably provided on the outer surface of the slider (17) and inside the sliding groove (16). A top rod (20) is rotatably provided on one side of the slider (19). Springs (18) are sleeved on the outer surface of the slider (17) and at the front and rear ends of the slider (19).

2. The fully enclosed double-helix grading device according to claim 1, characterized in that: One end of the top rod (20) is hinged to a slider two (23), which is slidably disposed inside the slide groove three (22).

3. The fully enclosed double-helix grading device according to claim 1, characterized in that: A baffle plate (15) is fixedly installed on one side of the front end of the feeding trough (11), and the baffle plate (15) is inclined at a certain angle.

4. The fully enclosed double-helix grading device according to claim 1, characterized in that: The housing (1) is equipped with embedded conveyor rollers (3), and pulleys (4) are fixedly installed at one end of each of the two conveyor rollers (3). A motor (5) is fixedly installed on one side of the housing (1).

5. The fully enclosed double-helix grading device according to claim 1, characterized in that: A support frame (6) is hinged to one side of the bottom of the box (1). A slide plate (7) is slidably mounted on the top of the support frame (6). Connecting rods (8) are hinged to both the front and rear ends of the slide plate (7). The top ends of the two connecting rods (8) are rotatably mounted on one side of the bottom of the box (1). A winding wheel (9) is rotatably mounted in the middle of one side of the support frame (6). A motor (10) is fixedly mounted on the rear end of the winding wheel (9).

Images