Automatic coal sample screening device

Abstract

The invention discloses an automatic coal sample screening device, and relates to the technical field of material screening equipment, and the automatic coal sample screening device is characterized by comprising a base, the upper surface of the base is fixedly connected with an obliquely arranged supporting frame, the automatic coal sample screening device further comprises an inner cylinder, and the inner cylinder is rotatably connected to the side wall of the supporting frame; the inner cylinder body is used for filtering water in a coal sample; the filter cartridge is arranged on the outer side of the inner barrel body in a sleeving manner, the end part of the filter cartridge is rotationally connected to the supporting frame, and the filter cartridge is used for screening a coal sample; the outer cylinder body is arranged on the outer side of the filter cartridge in a sleeving manner and is used for outputting the screened coal sample; the coal sample screening device has the advantages that coal samples with different particle size values can be screened out conveniently, manual replacement of the filter sieve is avoided, manpower and time are saved, and meanwhile the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material screening equipment, and more specifically, it relates to an automatic coal sample screening device. Background Art

[0002] As one of the main global energy sources, the quality detection of coal is crucial in industrial production, trade pricing, and environmental protection. The particle size analysis and moisture determination of coal samples are the core links of coal quality detection, directly affecting the selection of coal processing technology, the evaluation of combustion efficiency, and the control of pollutant emissions.

[0003] However, the existing coal sample screening tests are all manually operated. When the standard sieve size is too large and the amount of coal sample is too much, the screening test needs to be completed by two people. When the two people apply force out of sync, it is easy to cause coal spillage, resulting in deviation of the test results. Moreover, the labor intensity during the test process is too high, and when coal samples with different particle size values need to be screened, the staff needs to replace the filter screen, resulting in low test efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an automatic coal sample screening device.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An automatic coal sample screening device, including a base, on the upper surface of which is fixedly connected an inclined support frame, and further including:

[0007] An inner cylinder, which is rotatably connected to the side wall of the support frame, and the inner cylinder is used for filtering the moisture in the coal sample;

[0008] A filter cylinder, which is sleeved outside the inner cylinder, and the end of the filter cylinder is rotatably connected to the support frame, and the filter cylinder is used for screening the coal sample;

[0009] An outer cylinder, which is sleeved outside the filter cylinder, and the outer cylinder is used for outputting the screened coal sample;

[0010] Augers, there are multiple augers, and the multiple augers are respectively fixedly connected to the inner ring walls of the inner cylinder, the filter cylinder, and the outer cylinder;

[0011] A driving mechanism, which is arranged on the support frame, and the driving mechanism is used for driving the inner cylinder, the filter cylinder, and the outer cylinder to rotate;

[0012] A water circulation mechanism, which is arranged at the bottom of the base, and the water circulation mechanism is used for collecting the filtered moisture in the coal sample.

[0013] Preferably, a horizontally arranged fixing plate is fixedly connected to the side wall of the support frame. A feeding funnel is fixedly connected to the side wall of the fixing plate. A slantingly arranged discharging pipe is fixedly connected to the bottom of the feeding funnel. The lower end of the discharging pipe is fixedly connected to the side wall of the support frame, and the lower end of the discharging pipe penetrates through the side wall of the support frame and extends into the inner cylinder body.

[0014] Preferably, there are at least two filter cylinders, and a plurality of filter cylinders are sleeved with each other. Filter holes are formed in both the inner cylinder body and the plurality of filter cylinders. The aperture values of the filter holes on the inner cylinder body and the filter cylinders gradually increase from the inside to the outside.

[0015] Preferably, a water accumulation guiding plate is fixedly connected to the lower end of the inner cylinder body. The lower end of the water accumulation guiding plate is fixedly connected to the side wall of the support frame, and an arc-shaped water guiding groove is formed in the inner ring wall of the water accumulation guiding plate;

[0016] A drain hole is formed in the side wall of the support frame, and the arc-shaped water guiding groove is communicated with the drain hole;

[0017] A water-absorbing cotton is arranged on the upper end surface of the water accumulation guiding plate. The water-absorbing cotton is annular, and the inner ring wall of the water-absorbing cotton is fixedly connected to the outer ring wall of the inner cylinder body;

[0018] An L-shaped plate is fixedly connected to the side wall of the support frame. The L-shaped plate is slantingly arranged, and the side wall of the L-shaped plate is attached to the outer ring wall of the water-absorbing cotton. The L-shaped plate is used for squeezing out the water in the water-absorbing cotton, and the L-shaped plate cooperates with the drain hole.

[0019] Preferably, fixing rods are arranged on the outer sides of both the inner cylinder body and the filter cylinders. The fixing rods are fixedly connected to the side wall of the support frame in an inclined manner and are parallel to the inner cylinder body. Brush hairs are fixedly connected to the circumferential wall of the fixing rods, and the end parts of the brush hairs are respectively in contact with the outer ring walls of the inner cylinder body and the filter cylinders;

[0020] Heating pipes are symmetrically arranged on the outer sides of the inner cylinder body and the filter cylinders. The heating pipes are parallel to the inner cylinder body and are fixedly connected to the support frame. The heating pipes are used for heating the inner cylinder body and the filter cylinders to promote the evaporation of the moisture in the coal sample.

[0021] Preferably, the driving mechanism includes:

[0022] A driving motor, which is fixedly connected to the side wall of the support frame;

[0023] A gear, which is fixedly connected to a rotating shaft. The rotating shaft is rotatably connected to the side wall of the support frame, and the gear is located inside the outer cylinder body and outside the inner cylinder body and the filter cylinders. The end part of one of the rotating shafts is fixedly connected to the output shaft of the driving motor;

[0024] Inner tooth rings, there are multiple inner tooth rings, and the multiple inner tooth rings are respectively fixedly connected to the inner ring walls of the outer cylinder and the filter cylinder, and the inner tooth rings are meshed with the gears;

[0025] Outer tooth rings, there are multiple outer tooth rings, and the multiple outer tooth rings are respectively fixedly connected to the outer ring walls of the filter cylinder and the inner cylinder, and the outer tooth rings are meshed with the gears.

[0026] Preferably, the water circulation mechanism includes:

[0027] A water tank, the water tank is fixedly connected to the base;

[0028] A first connecting pipe, the upper end of the first connecting pipe is fixedly connected to the lower end of the drain hole, and the lower end of the first connecting pipe is fixedly connected to the bottom of the water tank and communicates with the water tank;

[0029] A water pump, the water pump is fixedly connected to the bottom of the water tank, and a water delivery pipe is fixedly connected to the water pump, and the water delivery pipe is matched with the outer cylinder.

[0030] Preferably, a protective cover is fixedly connected to the base, the side wall of the protective cover is fixedly connected to the side wall of the support frame, and a plurality of discharge holes are arranged on the side walls of the support frame and the protective cover in a top-down manner. A coal sample export plate is fixedly connected to the bottom of the discharge hole, and the length values of the plurality of coal sample export plates gradually decrease from top to bottom;

[0031] The lower end surface of the coal sample export plate is fixedly connected with an arc-shaped guide plate, and the extending directions of two adjacent arc-shaped guide plates up and down are opposite. A coal sample loading box is arranged at one end of the arc-shaped guide plate far away from the coal sample export plate, and the bottom of the coal sample loading box is in contact with the upper surface of the base.

[0032] Preferably, a ventilation pipe is fixedly connected to the top of the protective cover, a water storage box is fixedly connected to the outer ring wall of the ventilation pipe, the upper end of the water delivery pipe passes through the side wall of the water tank and is fixedly connected to the side wall of the water storage box, and the water delivery pipe communicates with the water storage box;

[0033] A plurality of annularly distributed spray heads are fixedly connected to the inner side wall of the ventilation pipe, and the spray heads communicate with the water storage box.

[0034] Preferably, a first connecting ring is fixedly connected to the lower end of the outer cylinder, a protective cylinder is fixedly connected to the side wall of the first connecting ring, and a condensation chamber is formed between the inner ring wall of the protective cylinder and the outer ring wall of the outer cylinder;

[0035] Ventilation holes are arranged on the side wall of the outer cylinder, and a protective cloth is fixedly connected to the outer ring wall of the outer cylinder;

[0036] The upper end surface of the protective cylinder is rotatably connected with a second connecting ring. The side wall of the second connecting ring is in contact with the upper end part of the outer cylinder, and the second connecting ring is fixedly connected to the support frame. An arc-shaped groove is formed in the side wall of the second connecting ring. A strip-shaped through hole is formed in the side wall of the protective cylinder. The strip-shaped through hole is matched with the arc-shaped groove, and a second connecting pipe is fixedly connected to the side wall of the arc-shaped groove. The second connecting pipe is communicated with the water storage box;

[0037] The lower end part of the strip-shaped through hole is communicated with the water tank through a drainage pipe.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. In the present invention, through the triple dehydration mechanism of the filter cloth, absorbent cotton and heating pipe in the inner cylinder, the moisture content of the coal sample is significantly reduced. At the same time, the multi-stage filter cylinder realizes accurate particle size classification, improving the accuracy of subsequent coal quality analysis.

[0040] 2. In the present invention, the water resource is recycled through the water circulation mechanism, and the steam is collected in the condensation chamber, reducing energy consumption; the protective cover and the nozzle spray dust reduction reduce dust pollution, meeting the environmental protection requirements.

[0041] 3. In the present invention, through the drive mechanism, the inner cylinder, the filter cylinder and the outer cylinder rotate synchronously and reversely through the gear-ring transmission. With the pushing action of the auger, continuous feeding, screening and discharging of the coal sample are realized, reducing manual intervention. By setting a plurality of filter cylinders, and the diameters of the filter holes on the filter cylinders gradually decrease from inside to outside, it is convenient to screen out coal samples with different particle size values, avoiding manual replacement of the filter screen, saving manpower and time, and improving the test efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is the overall structural schematic diagram of an automatic coal sample screening device proposed by the present invention;

[0043] Figure 2 is the cross-sectional view of an automatic coal sample screening device proposed by the present invention;

[0044] Figure 3 is Figure 2 the partial enlarged structural schematic diagram at A in

[0045] Figure 4 is Figure 2 the partial enlarged structural schematic diagram at B in

[0046] Figure 5 is the partial structural schematic of an automatic coal sample screening device proposed by the present invention Figure 1 ;

[0047] Figure 6The following is a schematic diagram of a partial structure of an automatic coal sample screening device proposed by the present invention Figure 2 ;

[0048] Figure 7 The following is a partial bottom view of an automatic coal sample screening device proposed by the present invention;

[0049] Figure 8 The following is a schematic diagram of the connection structure between the inner cylinder and the water-absorbing cotton in an automatic coal sample screening device proposed by the present invention;

[0050] Figure 9 The following is a schematic diagram of a partial connection structure between the inner cylinder and the water accumulation discharge plate in an automatic coal sample screening device proposed by the present invention;

[0051] Figure 10 The following is a schematic diagram of a partial connection structure between the inner cylinder and the protective cylinder in an automatic coal sample screening device proposed by the present invention Figure 1 ;

[0052] Figure 11 The following is a schematic diagram of a partial connection structure between the inner cylinder and the protective cylinder in an automatic coal sample screening device proposed by the present invention Figure 2 。

[0053] 1. Base; 2. Support frame; 3. Inner cylinder; 4. Filter cylinder; 5. Outer cylinder; 6. Screw conveyor; 7. Fixed plate; 8. Feeding funnel; 9. Discharge pipe; 10. Filter holes; 11. Water accumulation discharge plate; 12. Arc-shaped water guide groove; 13. Drainage holes; 14. Water-absorbing cotton; 15. L-shaped plate; 16. Fixed rod; 17. Brush bristles; 18. Heating tube; 19. Driving motor; 20. Gear; 21. Rotating shaft; 22. Inner gear ring; 23. Outer gear ring; 24. Water tank; 25. First connecting pipe; 26. Water pump; 27. Water delivery pipe; 28. Protective cover; 29. Discharge holes; 30. Coal sample discharge plate; 31. Arc-shaped guide plate; 32. Coal sample loading box; 33. Ventilation pipe; 34. Water storage box; 35. Sprinkler head; 36. First connecting ring; 37. Protective cylinder; 38. Condensation chamber; 39. Ventilation holes; 40. Protective cloth; 41. Second connecting ring; 42. Arc-shaped groove; 43. Strip-shaped through holes; 44. Second connecting pipe; 45. Drainage pipe; 46. Ring-shaped collection box. Detailed implementation manners

[0054] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0055] Refer to Figures 1 to 11 。

[0056] This embodiment further describes an automatic coal sample screening device proposed by the present invention.

[0057] An automatic coal sample screening device includes a base 1. A slantingly arranged support frame 2 is fixedly connected to the upper surface of the base 1. It further includes an inner cylinder 3. The inner cylinder 3 is rotatably connected to the side wall of the support frame 2 and is used for filtering the moisture in the coal sample.

[0058] A filter cylinder 4. The filter cylinder 4 is sleeved outside the inner cylinder 3. The end of the filter cylinder 4 is rotatably connected to the support frame 2, and the filter cylinder 4 is used for screening the coal sample.

[0059] An outer cylinder 5. The outer cylinder 5 is sleeved outside the filter cylinder 4 and is used for outputting the screened coal sample.

[0060] Augers 6. There are multiple augers 6, and the multiple augers 6 are respectively fixedly connected to the inner ring walls of the inner cylinder 3, the filter cylinder 4, and the outer cylinder 5.

[0061] A drive mechanism. The drive mechanism is arranged on the support frame 2 and is used for driving the inner cylinder 3, the filter cylinder 4, and the outer cylinder 5 to rotate.

[0062] A water circulation mechanism. The water circulation mechanism is arranged at the bottom of the base 1 and is used for collecting the filtered moisture in the coal sample.

[0063] A horizontally arranged fixing plate 7 is fixedly connected to the side wall of the support frame 2. A feed hopper 8 is fixedly connected to the side wall of the fixing plate 7. The bottom of the feed hopper 8 is fixedly connected to a slantingly arranged discharge pipe 9. The lower end of the discharge pipe 9 is fixedly connected to the side wall of the support frame 2, and the lower end of the discharge pipe 9 passes through the side wall of the support frame 2 and extends into the inner cylinder 3.

[0064] There are at least two filter cylinders 4, and the multiple filter cylinders 4 are sleeved with each other. Filter holes 10 are formed in both the inner cylinder 3 and the multiple filter cylinders 4. The aperture values of the filter holes 10 on the inner cylinder 3 and the filter cylinders 4 gradually increase from the inside to the outside.

[0065] A water accumulation discharge plate 11 is fixedly connected to the lower end of the inner cylinder 3. The lower end of the water accumulation discharge plate 11 is fixedly connected to the side wall of the support frame 2. An arc-shaped water guide groove 12 is formed in the inner ring wall of the water accumulation discharge plate 11. A layer of filter cloth is fixedly connected to the outer side wall of the inner cylinder 3. The filter cloth facilitates the filtration of the moisture in the coal sample, so that the water in the coal sample can penetrate downward through the filter cloth into the arc-shaped water guide groove 12, thereby facilitating the collection and recycling of the moisture in the coal sample.

[0066] A drain hole 13 is formed in the side wall of the support frame 2. The arc-shaped water guide groove 12 is communicated with the drain hole 13.

[0067] The upper end surface of the water accumulation drainage plate 11 is provided with a water-absorbing cotton 14. The water-absorbing cotton 14 is annular, and the inner ring wall of the water-absorbing cotton 14 is fixedly connected to the outer ring wall of the inner cylinder 3. The water-absorbing cotton 14 is used to absorb the residual water on the surface of the coal sample, thereby further reducing the water content in the coal sample.

[0068] An L-shaped plate 15 is fixedly connected to the side wall of the support frame 2. The L-shaped plate 15 is inclined, and the side wall of the L-shaped plate 15 is in contact with the outer ring wall of the water-absorbing cotton 14. The L-shaped plate 15 is used to squeeze out the water in the water-absorbing cotton 14, and the L-shaped plate 15 cooperates with the drainage hole 13. A water accumulation discharge hole is formed in the side wall of the support frame 2. The water accumulation discharge hole is communicated with the drainage hole 13 and cooperates with the L-shaped plate 15. When the L-shaped plate 15 squeezes out the accumulated water in the water-absorbing cotton 14, the squeezed water flows downward along the L-shaped plate 15 into the water accumulation discharge hole and is discharged through the drainage hole 13. And the L-shaped plate 15 is parallel to the inner cylinder 3. Among them, the length value of the water-absorbing cotton 14 is less than the length value of the inner cylinder 3.

[0069] Fixing rods 16 are arranged on the outer sides of both the inner cylinder 3 and the filter cylinder 4. The fixing rods 16 are fixedly connected to the side wall of the support frame 2 in an inclined manner and are parallel to the inner cylinder 3. Brush hairs 17 are fixedly connected to the circumferential wall of the fixing rods 16. The ends of the brush hairs 17 are respectively in contact with the outer ring walls of the inner cylinder 3 and the filter cylinder 4. The brush hairs 17 are used to clean the filter holes 10 on the inner cylinder 3 and the filter cylinder 4, thereby preventing the coal sample from blocking the holes on the inner cylinder 3 and the filter cylinder 4, thus ensuring the screening efficiency of the coal sample. And one side of the fixing rod 16 located between the outer side wall of the filter cylinder 4 and the inner side wall of the outer cylinder 5, the brush hairs 17 are in contact with the inner side wall of the outer cylinder 5, thereby facilitating the brush hairs 17 to clean the coal sample adhered to the inner side wall of the outer cylinder 5. And the length value of the fixing rod 16 is equal to the length value of the outer cylinder 5.

[0070] Heating tubes 18 are symmetrically arranged on the outer sides of the inner cylinder 3 and the filter cylinder 4. The heating tubes 18 are parallel to the inner cylinder 3 and are fixedly connected to the support frame 2. The heating tubes 18 are used to heat the inner cylinder 3 and the filter cylinder 4 to promote the evaporation of the water in the coal sample. A heat conduction tube is sleeved on the outer side part of the heating tubes 18. The heat conduction tube is used to dissipate the heat on the heating tubes 18 to the outside, thereby baking the inner cylinder 3 and the filter cylinder 4. Thus, the heat is transferred to the coal sample through the inner cylinder 3 and the filter cylinder 4, thereby promoting the evaporation of the water in the coal sample. At the same time, it can also promote the evaporation of the residual water on the inner cylinder 3 and the filter cylinder 4.

[0071] The driving mechanism includes a driving motor 19, and the driving motor 19 is fixedly connected to the side wall of the support frame 2.

[0072] Gear 20, a rotating shaft 21 is fixedly connected to the gear 20, the rotating shaft 21 is rotatably connected to the side wall of the support frame 2, and the gear 20 is located inside the outer cylinder 5. The gear 20 is located outside the inner cylinder 3 and the filter cylinder 4. The end of one of the rotating shafts 21 is fixedly connected to the output shaft of the driving motor 19.

[0073] Inner gear rings 22, there are multiple inner gear rings 22, and the multiple inner gear rings 22 are respectively fixedly connected to the inner ring walls of the outer cylinder 5 and the filter cylinder 4. The inner gear rings 22 are meshed with the gear 20.

[0074] Outer gear rings 23, there are multiple outer gear rings 23, and the multiple outer gear rings 23 are respectively fixedly connected to the outer ring walls of the filter cylinder 4 and the inner cylinder 3. The outer gear rings 23 are meshed with the gear 20. The thread directions of two adjacent augers 6 inside and outside are opposite, so that the gear 20 drives the inner gear rings 22 and the outer gear rings 23 in contact with it to rotate, thereby driving the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5 to rotate. And the thread directions of the augers 6 in the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5 are consistent with their rotation directions, so as to facilitate the augers 6 to convey the coal sample to the upper ends of the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5.

[0075] The water circulation mechanism includes a water tank 24, and the water tank 24 is fixedly connected to the base 1.

[0076] The first connecting pipe 25, the upper end of the first connecting pipe 25 is fixedly connected to the lower end of the drain hole 13, and the lower end of the first connecting pipe 25 is fixedly connected to the bottom of the water tank 24 and is communicated with the water tank 24.

[0077] A water pump 26, the water pump 26 is fixedly connected to the bottom of the water tank 24, and a water delivery pipe 27 is fixedly connected to the water pump 26. The water delivery pipe 27 is matched with the outer cylinder 5.

[0078] A protective cover 28 is fixedly connected to the base 1. The side wall of the protective cover 28 is fixedly connected to the side wall of the support frame 2. And a plurality of discharge holes 29 distributed from top to bottom are opened on the side walls of the support frame 2 and the protective cover 28. The bottom of the discharge hole 29 is fixedly connected to a coal sample guiding plate 30. The length values of the plurality of coal sample guiding plates 30 gradually decrease from top to bottom. The protective cover 28 can prevent the dust generated during the process of the coal sample sliding down through the coal sample guiding plate 30 into the coal sample loading box 32 from flying into the air, thereby reducing the pollution of the air by the dust generated when the coal sample falls. The longitudinal section of the coal sample guiding plate 30 is arc-shaped, and the end of the coal sample guiding plate 30 away from the discharge hole 29 is inclined downward, so as to facilitate the coal sample to slide down through the coal sample guiding plate 30.

[0079] The lower end face of the coal sample export plate 30 is fixedly connected with an arc-shaped material guiding plate 31. The extending directions of two adjacent arc-shaped material guiding plates 31 above and below are opposite. One end of the arc-shaped material guiding plate 31 away from the coal sample export plate 30 is provided with a coal sample loading box 32. The bottom of the coal sample loading box 32 is in contact with the upper surface of the base 1. The side of the protective cover 28 opposite to the end of the arc-shaped material guiding plate 31 is open, and a cover plate is rotatably connected to the opening of the protective cover 28, so as to facilitate placing the coal sample loading box 32 on the base 1 and also facilitate taking out the coal sample loading box 32.

[0080] The top of the protective cover 28 is fixedly connected with a ventilation duct 33. A water storage box 34 is fixedly connected to the outer ring wall of the ventilation duct 33. The upper end of the water delivery pipe 27 passes through the side wall of the water tank 24 and is fixedly connected to the side wall of the water storage box 34, and the water delivery pipe 27 is communicated with the water storage box 34.

[0081] A plurality of spray heads 35 distributed in a ring are fixedly connected to the inner side wall of the ventilation duct 33. The spray heads 35 are communicated with the water storage box 34. The ventilation duct 33 can increase the ventilation efficiency in the protective cover 28, and at the same time, the water in the water storage box 34 is sprayed out in a mist state through the spray heads 35, so as to prevent the dust in the protective cover 28 from diffusing to the outside through the ventilation duct 33.

[0082] The lower end of the outer cylinder 5 is fixedly connected with a first connection ring 36. A protective cylinder 37 is fixedly connected to the side wall of the first connection ring 36. A condensation chamber 38 is formed between the inner ring wall of the protective cylinder 37 and the outer ring wall of the outer cylinder 5. A plurality of drain ports distributed in a ring are opened on one side wall of the condensation chamber 38 away from the outer cylinder 5. The drain ports are communicated with the annular collection box 46. When the water vapor condenses into water droplets in the condensation chamber 38, the water droplets drip down to the bottom of the condensation chamber 38 along the inclined surface of the condensation chamber 38 and are discharged into the annular collection box 46 through the drain ports, so as to realize the collection of the water vapor condensed into water droplets.

[0083] Ventilation holes 39 are opened on the side wall of the outer cylinder 5. A protective cloth 40 is fixedly connected to the outer ring wall of the outer cylinder 5. The material of the protective cloth 40 is wear-resistant and breathable, which is convenient for the water vapor in the outer cylinder 5 to enter the condensation chamber 38 through the protective cloth 40, and at the same time can prevent the coal sample in the outer cylinder 5 from falling down into the condensation chamber 38 through the ventilation holes 39.

[0084] The upper end face of the protective cylinder 37 is rotatably connected with a second connection ring 41. The side wall of the second connection ring 41 is in contact with the upper end of the outer cylinder 5, and the second connection ring 41 is fixedly connected to the support frame 2. An arc-shaped groove 42 is opened on the second connection ring 41. A strip-shaped through hole 43 is opened on the side wall of the protective cylinder 37. The strip-shaped through hole 43 is matched with the arc-shaped groove 42, and a second connection pipe 44 is fixedly connected to the side wall of the arc-shaped groove 42. The second connection pipe 44 is communicated with the water storage box 34.

[0085] The lower end of the strip-shaped through hole 43 is connected to the water tank 24 through a drainage pipe 45. A circular collecting box 46 is rotatably connected to the lower end of the protective cylinder 37. The side wall of the circular collecting box 46 is fixedly connected to the side wall of the support frame 2. A circular through hole is provided at the lower end of the protective cylinder 37, and the circular through hole is connected to the strip-shaped through hole 43. The strip-shaped through hole 43 is connected to the circular collecting box 46 through the circular through hole. The upper end of the drainage pipe 45 is fixedly connected to the bottom of the circular collecting box 46, and the lower end of the drainage pipe 45 is fixedly connected to the top of the water tank 24. The circular collecting box 46 is connected to the water tank 24 through the drainage pipe 45.

[0086] Working principle: The coal sample enters the inclined inner cylinder 3 through the feeding funnel 8. The driving motor 19 is started, and the output shaft of the driving motor 19 drives one of the gears 20 to rotate. Thus, through the meshing of the gear 20 with the internal gear ring 22 and the external gear ring 23, the outer cylinder 5, the filter cylinder 4, and the inner cylinder 3 are driven to rotate, and the auger 6 is driven to rotate. During the rotation of the outer cylinder 5, the filter cylinder 4, and the inner cylinder 3, the coal sample tumbles in the inner cylinder 3 and is pushed upward by the auger 6. The moisture contained in the coal sample at the lower end of the inner cylinder 3 seeps into the arc-shaped water guide groove 12 through the filter cloth, and then drains downward into the water tank 24 through the drain hole 13 and the first connecting pipe 25. The absorbent cotton 14 absorbs the residual moisture on the surface of the coal sample. When the absorbent cotton 14 rotates to the position of the L-shaped plate 15, the moisture is squeezed out by the side of the L-shaped plate 15, and the squeezed moisture flows downward along the inclined surface of the L-shaped plate 15 into the water accumulation discharge hole on the support frame 2, and then drains into the water tank 24 through the drain hole 13 and the first connecting pipe 25, thereby realizing the recycling of the moisture in the coal sample and reducing the waste of water resources.

[0087] The coal sample in the inner cylinder 3 enters the first-layer filter cylinder 4 through the filter holes 10. The finer particles fall through the sieve holes of this layer, and the remaining coal sample is continuously pushed by the auger 6 to the outer-layer filter cylinder 4. Since there are multiple filter cylinders 4 and the aperture values of the filter holes 10 on the multiple filter cylinders 4 gradually decrease from the inside to the outside, the coal sample with a smaller particle size value sequentially falls downward through the holes on the filter cylinder 4. The coal sample with the smallest particles enters the outer cylinder 5 and is discharged, while the coal sample with the largest particles stays in the inner cylinder 3 and is output through the auger 6, thereby realizing the gradual separation of the coal sample into different particle size grades.

[0088] During the rotation of the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5, when the side walls of the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5 come into contact with the bristles 17, the bristles 17 clean the coal sample remaining on the side walls of the inner cylinder 3 and the filter cylinder 4 and in the filter hole 10, which not only avoids the clogging of the filter hole 10, but also avoids the coal sample from adhering to the side walls of the inner cylinder 3 and the filter cylinder 4. When the inner wall of the outer cylinder 5 comes into contact with the bristles 17 during the rotation, the bristles 17 clean the inner wall of the outer cylinder 5 to avoid the coal sample from adhering to the inner wall of the outer cylinder 5.

[0089] While the coal sample is being transported to the upper end through the auger 6 on the inner cylinder 3, the heating tube 18 heats the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5, so that the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5 transfer heat to the coal sample inside, thereby increasing the temperature of the coal sample and accelerating the evaporation of water in the coal sample. The water vapor evaporates upward through the filter holes 10 and the air holes 39 and enters the protective cloth 40. When the protective cloth 40 is close to the heating pipe 18, the heating pipe 18 bakes the protective cloth 40, so that the water in the protective cloth 40 evaporates upward and enters the condensation chamber 38. At this time, the water pump 26 is turned on, and the water pump 26 transports the water in the water tank 24 to the water storage box 34 through the water delivery pipe 27, so that the water in the water storage box 34 is sprayed out in a mist form through the nozzle 35, and part of the water is transported to the arc groove 42 through the second connecting pipe 44. , and then enters the strip through hole 43 through the arc groove 42, so that the heat on the side wall of the strip through hole 43 is taken away by the water flow in the strip through hole 43, thereby reducing the temperature of the side wall of the strip through hole 43, thereby indirectly reducing the temperature of the protective tube 37. When the water vapor contacts the side wall of the condensation chamber 38, since the temperature value of the inner ring wall of the protective tube 37 is lower than the temperature value of the water vapor, it is convenient for the water vapor to condense into water droplets and slide down along the inner ring wall of the protective tube 37 to the bottom of the condensation chamber 38, and then enter the annular collection box 46 through the drain port located at the bottom of the condensation chamber 38, thereby realizing the collection of water vapor in the outer cylinder 5, and at the same time reducing the humidity inside the outer cylinder 5, which is convenient for the drying of the coal sample. The material of the protective tube 37 is a heat-conducting material, so that it is convenient for the water flow to take away the temperature on the side wall of the protective tube 37, thereby improving the condensation effect of the water vapor.

[0090] When coal samples of different particle sizes fall into the corresponding coal sample outlet plate 30 through the discharge hole 29 and are introduced into the corresponding coal sample loading box 32 through the arc guide plate 31, and the dust generated inside the protective cover 28 when the coal samples fall flies upward through the ventilation duct 33, the nozzle 35 sprays the water in the water storage box 34 in the form of mist, thereby increasing the weight of the dust flying upward through the water mist, thereby facilitating the sedimentation of the coal sample dust and preventing the dust from being blown out, thereby achieving the purpose of dust reduction.

[0091] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An automatic coal sample screening device, comprising a base (1), wherein the upper surface of the base (1) is fixedly connected with an inclined support frame (2), and is characterized in that, It further includes: An inner cylinder body (3), which is rotatably connected to the side wall of the support frame (2), and the inner cylinder body (3) is used for filtering the moisture in the coal sample; A filter cylinder (4), which is sleeved outside the inner cylinder body (3), and the end of the filter cylinder (4) is rotatably connected to the support frame (2), and the filter cylinder (4) is used for screening the coal sample; An outer cylinder body (5), which is sleeved outside the filter cylinder (4), and the outer cylinder body (5) is used for outputting the screened coal sample; Augers (6), there are multiple augers (6), and the multiple augers (6) are respectively fixedly connected to the inner ring walls of the inner cylinder body (3), the filter cylinder (4), and the outer cylinder body (5); A driving mechanism, which is arranged on the support frame (2), and the driving mechanism is used for driving the inner cylinder body (3), the filter cylinder (4), and the outer cylinder body (5) to rotate; A water circulation mechanism, which is arranged at the bottom of the base (1), and the water circulation mechanism is used for collecting the filtered moisture in the coal sample.

2. The automatic coal sample screening device according to claim 1, wherein, A horizontally arranged fixed plate (7) is fixedly connected to the side wall of the support frame (2), a feeding funnel (8) is fixedly connected to the side wall of the fixed plate (7), a slantingly arranged discharge pipe (9) is fixedly connected to the bottom of the feeding funnel (8), the lower end of the discharge pipe (9) is fixedly connected to the side wall of the support frame (2), and the lower end of the discharge pipe (9) passes through the side wall of the support frame (2) and extends into the inner cylinder body (3).

3. The automatic coal sample screening device according to claim 2, characterized in that There are at least two filter cylinders (4), and the multiple filter cylinders (4) are sleeved with each other. Filter holes (10) are formed on both the inner cylinder body (3) and the multiple filter cylinders (4), and the aperture values of the filter holes (10) on the inner cylinder body (3) and the filter cylinder (4) gradually increase from inside to outside.

4. The automatic coal sample screening device according to claim 3, characterized in that, A water accumulation guide plate (11) is fixedly connected to the lower end of the inner cylinder body (3), the lower end of the water accumulation guide plate (11) is fixedly connected to the side wall of the support frame (2), and an arc-shaped water guide groove (12) is formed on the inner ring wall of the water accumulation guide plate (11); A drain hole (13) is formed on the side wall of the support frame (2), and the arc-shaped water guide groove (12) is communicated with the drain hole (13); A water absorbent cotton (14) is arranged on the upper end surface of the water accumulation guide plate (11), the water absorbent cotton (14) is annular, and the inner ring wall of the water absorbent cotton (14) is fixedly connected to the outer ring wall of the inner cylinder body (3); An L-shaped plate (15) is fixedly connected to the side wall of the support frame (2), the L-shaped plate (15) is slantingly arranged, and the side wall of the L-shaped plate (15) is attached to the outer ring wall of the water absorbent cotton (14). The L-shaped plate (15) is used for squeezing out the moisture in the water absorbent cotton (14), and the L-shaped plate (15) cooperates with the drain hole (13).

5. An automatic coal sample screening device according to claim 4, characterized in that, Fixed rods (16) are arranged on the outer sides of the inner cylinder body (3) and the filter cylinder (4). The fixed rods (16) are fixedly connected to the side wall of the support frame (2) in an inclined manner, and the fixed rods (16) are parallel to the inner cylinder body (3). Brush hairs (17) are fixedly connected to the circumferential wall of the fixed rods (16), and the end parts of the brush hairs (17) are respectively in contact with the outer ring walls of the inner cylinder body (3) and the filter cylinder (4). Heating tubes (18) are symmetrically arranged on the outer sides of the inner cylinder body (3) and the filter cylinder (4). The heating tubes (18) are parallel to the inner cylinder body (3), and the heating tubes (18) are fixedly connected to the support frame (2). The heating tubes (18) are used to heat the inner cylinder body (3) and the filter cylinder (4) to promote the evaporation of moisture in the coal sample.

6. The automatic coal sample screening device according to claim 5, characterized in that, The driving mechanism includes: A driving motor (19), which is fixedly connected to the side wall of the support frame (2); A gear (20), on which a rotating shaft (21) is fixedly connected. The rotating shaft (21) is rotatably connected to the side wall of the support frame (2), and the gear (20) is located inside the outer cylinder body (5). The gear (20) is located outside the inner cylinder body (3) and the filter cylinder (4). The end of one of the rotating shafts (21) is fixedly connected to the output shaft of the driving motor (19); Inner toothed rings (22), there are multiple inner toothed rings (22), and the multiple inner toothed rings (22) are respectively fixedly connected to the inner ring walls of the outer cylinder body (5) and the filter cylinder (4). The inner toothed rings (22) are meshed with the gear (20); Outer toothed rings (23), there are multiple outer toothed rings (23), and the multiple outer toothed rings (23) are respectively fixedly connected to the outer ring walls of the filter cylinder (4) and the inner cylinder body (3). The outer toothed rings (23) are meshed with the gear (20).

7. The automatic coal sample screening device according to claim 6, characterized in that, The water circulation mechanism includes: A water tank (24), which is fixedly connected to the base (1); A first connecting pipe (25), the upper end of the first connecting pipe (25) is fixedly connected to the lower end of the drain hole (13), and the lower end of the first connecting pipe (25) is fixedly connected to the bottom of the water tank (24) and is communicated with the water tank (24); A water pump (26), which is fixedly connected to the bottom of the water tank (24). A water delivery pipe (27) is fixedly connected to the water pump (26), and the water delivery pipe (27) is matched with the outer cylinder body (5).

8. The automatic coal sample screening device according to claim 7, wherein, A protective cover (28) is fixedly connected to the base (1). The side wall of the protective cover (28) is fixedly connected to the side wall of the support frame (2). A plurality of discharge holes (29) are arranged from top to bottom on the side walls of the support frame (2) and the protective cover (28). A coal sample export plate (30) is fixedly connected to the bottom of the discharge holes (29). The length values of the plurality of coal sample export plates (30) gradually decrease from top to bottom; The lower end surface of the coal sample export plate (30) is fixedly connected with an arc-shaped material guiding plate (31). The extending directions of two adjacent arc-shaped material guiding plates (31) above and below are opposite. One end of the arc-shaped material guiding plate (31) away from the coal sample export plate (30) is provided with a coal sample loading box (32). The bottom of the coal sample loading box (32) is in contact with the upper surface of the base (1).

9. The automatic coal sample screening device according to claim 8, characterized in that, The top of the protective cover (28) is fixedly connected with a ventilation duct (33). A water storage box (34) is fixedly connected to the outer ring wall of the ventilation duct (33). The upper end of the water delivery pipe (27) passes through the side wall of the water tank (24) and is fixedly connected to the side wall of the water storage box (34), and the water delivery pipe (27) is communicated with the water storage box (34); A plurality of spray heads (35) distributed in a ring shape are fixedly connected to the inner side wall of the ventilation duct (33). The spray heads (35) are communicated with the water storage box (34).

10. The automatic coal sample screening device according to claim 9, wherein The lower end of the outer cylinder (5) is fixedly connected with a first connecting ring (36). A protective cylinder (37) is fixedly connected to the side wall of the first connecting ring (36). A condensation chamber (38) is formed between the inner ring wall of the protective cylinder (37) and the outer ring wall of the outer cylinder (5); Ventilation holes (39) are formed in the side wall of the outer cylinder (5). A protective cloth (40) is fixedly connected to the outer ring wall of the outer cylinder (5); The upper end surface of the protective cylinder (37) is rotatably connected with a second connecting ring (41). The side wall of the second connecting ring (41) is in contact with the upper end of the outer cylinder (5), and the second connecting ring (41) is fixedly connected to the support frame (2). An arc-shaped groove (42) is formed in the second connecting ring (41). A strip-shaped through hole (43) is formed in the side wall of the protective cylinder (37). The strip-shaped through hole (43) is matched with the arc-shaped groove (42). A second connecting pipe (44) is fixedly connected to the side wall of the arc-shaped groove (42). The second connecting pipe (44) is communicated with the water storage box (34); The lower end of the strip-shaped through hole (43) is communicated with the water tank (24) through a drainage pipe (45).

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