Automatic coal sample screening device

Abstract

The application discloses a kind of coal sample automatic screening device, it is related to material screening equipment technical field, and its technical solution key points include base, the upper surface of the base is fixedly connected with the support frame of inclined arrangement, further include inner cylinder, the inner cylinder is rotatably connected on the side wall of support frame, the inner cylinder is used to filter moisture in coal sample;The filter cartridge is sleeved on the outside of inner cylinder, and the end of the filter cartridge is rotatably connected on the support frame, and filter cartridge is used to screen coal sample;The outer cylinder is sleeved on the outside of filter cartridge, and the outer cylinder is used to output screened coal sample;Effect is to facilitate screening out coal sample of different particle size values, avoid manual replacement of filter screen, save manpower and time, and also improve test efficiency.

Description

[0001] This invention relates to the field of material screening equipment technology, and more specifically, to an automatic coal sample screening device. Background Technology

[0002] As one of the world's major energy sources, coal quality testing is crucial in industrial production, trade pricing, and environmental protection. Particle size analysis and moisture determination of coal samples are the core aspects of coal quality testing, directly affecting the selection of coal processing technology, combustion efficiency assessment, and pollutant emission control.

[0003] However, existing coal sample screening tests are all done manually. When the standard sieve size is too large or the amount of coal sample is too large, the screening test requires two people to work together. When the two people exert force at different times, coal is easily spilled, which leads to deviations in the test results. Moreover, the labor intensity of the test process is too high. Furthermore, when it is necessary to screen coal samples with different particle size values, the staff needs to change the filter sieve, which leads to low test efficiency. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automatic coal sample screening device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic coal sample screening device includes a base, wherein an inclined support frame is fixedly connected to the upper surface of the base, and further includes: The inner cylinder is rotatably connected to the side wall of the support frame and is used to filter moisture in the coal sample. A filter cylinder is sleeved on the outside of an inner cylinder, and the end of the filter cylinder is rotatably connected to a support frame. The filter cylinder is used to screen coal samples. The outer cylinder is fitted around the outside of the filter cylinder and is used to output the screened coal sample. Screwdrivers, wherein there are multiple screwdrivers, and the multiple screwdrivers are respectively fixedly connected to the inner ring wall of the inner cylinder, the filter cylinder, and the outer cylinder; A drive mechanism is mounted on a support frame and is used to drive the inner cylinder, filter cylinder, and outer cylinder to rotate. A water circulation mechanism is located at the bottom of the base and is used to collect the filtered water in the coal sample.

[0006] 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, an inclined discharge pipe is fixedly connected to the bottom of the feeding funnel, the lower end of the discharge pipe is fixedly connected to the side wall of the support frame, and the lower end of the discharge pipe passes through the side wall of the support frame and extends into the inner cylinder.

[0007] Preferably, there are at least two filter cylinders, and multiple filter cylinders are nested together. Filter holes are provided on both the inner cylinder and the multiple filter cylinders, and the pore size of the filter holes on the inner cylinder and the filter cylinders gradually increases from the inside to the outside.

[0008] Preferably, a water discharge plate is fixedly connected to the lower end of the inner cylinder, the lower end of the water discharge plate is fixedly connected to the side wall of the support frame, and an arc-shaped water guide groove is provided on the inner ring wall of the water discharge plate. The side wall of the support frame is provided with a drainage hole, and the arc-shaped water guide groove is connected to the drainage hole; The upper end face of the water discharge plate is provided with absorbent cotton, which is annular, and the inner ring wall of the absorbent cotton is fixedly connected to the outer ring wall of the inner cylinder. An L-shaped plate is fixedly connected to the side wall of the support frame. The L-shaped plate is inclined and its side wall is in contact with the outer ring wall of the absorbent cotton. The L-shaped plate is used to squeeze out the water in the absorbent cotton and it is matched with the drainage hole.

[0009] Preferably, a fixing rod is provided on the outer side of both the inner cylinder and the filter cylinder. The fixing rod is fixedly connected to the side wall of the support frame at an angle and is parallel to the inner cylinder. Brush bristles are fixedly connected to the circumferential wall of the fixing rod, and the ends of the brush bristles are in contact with the outer ring wall of the inner cylinder and the filter cylinder, respectively. Heating tubes are symmetrically arranged on the outer sides of the inner cylinder and the filter cylinder. The heating tubes are parallel to the inner cylinder and are fixedly connected to the support frame. The heating tubes are used to heat the inner cylinder and the filter cylinder to promote the evaporation of moisture in the coal sample.

[0010] Preferably, the drive mechanism includes: A drive motor, which is fixedly connected to the side wall of the support frame; A gear, on which a rotating shaft is fixedly connected, the rotating shaft being rotatably connected to the side wall of the support frame, and the gear being located inside the outer cylinder and outside the inner cylinder and filter cylinder, with one end of the rotating shaft being fixedly connected to the output shaft of the drive motor; The internal gear ring comprises multiple internal gear rings, which are respectively fixedly connected to the inner ring wall of the outer cylinder and the filter cylinder, and the internal gear ring meshes with a gear. The external gear rings are multiple in number and are respectively fixedly connected to the outer ring wall of the filter cylinder and the inner cylinder. The external gear rings mesh with gears.

[0011] Preferably, the water circulation mechanism includes: A water tank, which is fixedly connected to the base; The first connecting pipe has its upper end fixedly connected to the lower end of the drain hole, and its lower end fixedly connected to the bottom of the water tank and connected to the water tank. A water pump is fixedly connected to the bottom of the water tank, and a water delivery pipe is fixedly connected to the water pump. The water delivery pipe is matched with the outer cylinder.

[0012] 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 multiple discharge holes distributed from top to bottom are opened on both the support frame and the side wall of the protective cover. A coal sample outlet plate is fixedly connected to the bottom of the discharge hole, and the length values ​​of the multiple coal sample outlet plates gradually decrease from top to bottom. An arc-shaped guide plate is fixedly connected to the lower end face of the coal sample outlet plate. The two adjacent arc-shaped guide plates extend in opposite directions. A coal sample loading box is provided at the end of the arc-shaped guide plate away from the coal sample outlet plate. The bottom of the coal sample loading box is in contact with the upper surface of the base.

[0013] Preferably, a ventilation duct 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 duct, the upper end of the water supply 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 supply pipe and the water storage box are connected. Multiple nozzles arranged in a ring are fixedly connected to the inner wall of the ventilation duct, and the nozzles are connected to the water storage box.

[0014] Preferably, a first connecting ring is fixedly connected to the lower end of the outer cylinder, and a protective cylinder is fixed on the side wall of the first connecting ring. A condensation chamber is formed between the inner ring wall of the protective cylinder and the outer ring wall of the outer cylinder. Ventilation holes are provided on the side wall of the outer cylinder, and a protective cloth is fixedly connected to the outer ring wall of the outer cylinder; The upper end face of the protective cylinder is rotatably connected to a second connecting ring. The side wall of the second connecting ring contacts the upper end of the outer cylinder and is fixedly connected to the support frame. An arc-shaped groove is provided on the second connecting ring. A strip-shaped through hole is provided on the side wall of the protective cylinder. The strip-shaped through hole cooperates 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 connected to the water storage box. The lower end of the strip-shaped through hole is connected to the water tank via a drainage pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, the moisture content of coal samples is significantly reduced through a triple dehydration mechanism consisting of the filter cloth, absorbent cotton, and heating tube in the inner cylinder. At the same time, the multi-stage filter cylinder achieves precise particle size classification, improving the accuracy of subsequent coal quality analysis.

[0016] 2. In this invention, water resources are recycled and utilized through a water circulation mechanism, and water vapor is collected in the condensation chamber to reduce energy consumption; the protective cover and spray nozzles spray dust to reduce dust pollution, which meets environmental protection requirements.

[0017] 3. In this invention, the inner cylinder, filter cylinder, and outer cylinder are synchronously rotated in opposite directions by a drive mechanism via gear-ring transmission. Combined with the pushing action of the auger, continuous feeding, screening, and discharging of coal samples are achieved, reducing manual intervention. By setting multiple filter cylinders with the diameter of the filter holes gradually decreasing from the inside to the outside, it is easy to screen coal samples with different particle sizes, avoiding manual replacement of the filter screen, saving manpower and time, and improving test efficiency. Attached Figure Description

[0018] Figure 1 This invention provides an overall structural schematic diagram of an automatic coal sample screening device; Figure 2 A cross-sectional view of an automatic coal sample screening device is provided for this invention; Figure 3 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle; Figure 4 for Figure 2 A magnified schematic diagram of the local structure at point B; Figure 5 A partial structural diagram of an automatic coal sample screening device is provided for this invention. Figure 1 ; Figure 6 A partial structural diagram of an automatic coal sample screening device is provided for this invention. Figure 2 ; Figure 7 A partial bottom view of an automatic coal sample screening device is provided for this invention; Figure 8 This invention provides a schematic diagram of the connection structure between the inner cylinder and the absorbent cotton in an automatic coal sample screening device. Figure 9 This invention provides a schematic diagram of a partial connection structure between the inner cylinder and the water discharge plate in an automatic coal sample screening device. Figure 10 This invention provides a schematic diagram of a partial connection structure between the inner cylinder and the protective cylinder in an automatic coal sample screening device. Figure 1 ; Figure 11 This invention provides a schematic diagram of a partial connection structure between the inner cylinder and the protective cylinder in an automatic coal sample screening device. Figure 2 .

[0019] 1. Base; 2. Support frame; 3. Inner cylinder; 4. Filter cylinder; 5. Outer cylinder; 6. Screwdriver; 7. Fixing plate; 8. Feed funnel; 9. Discharge pipe; 10. Filter hole; 11. Water collection and drainage plate; 12. Arc-shaped water guide groove; 13. Drain hole; 14. Absorbent cotton; 15. L-shaped plate; 16. Fixing rod; 17. Brush bristles; 18. Heating tube; 19. Drive motor; 20. Gear; 21. Rotating shaft; 22. Internal gear ring; 23. External gear ring; 24. Water tank; 25. First connection 26. Pipeline; 27. Water pump; 28. Water supply pipeline; 29. ​​Protective cover; 30. Discharge hole; 31. Coal sample outlet plate; 32. Arc-shaped guide plate; 33. Coal sample loading box; 34. Ventilation duct; 35. Water storage box; 36. Nozzle; 37. First connecting ring; 38. Protective cylinder; 39. Condensation chamber; 40. Ventilation hole; 41. Protective cloth; 42. Second connecting ring; 43. Arc-shaped groove; 44. Strip-shaped through hole; 45. Second connecting pipeline; 46. Drainage pipeline; 47. Annular collection box. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0021] Reference Figures 1 to 11 .

[0022] This embodiment further illustrates the automatic coal sample screening device proposed in this invention.

[0023] An automatic coal sample screening device includes a base 1, an inclined support frame 2 fixedly connected to the upper surface of the base 1, and an inner cylinder 3 rotatably connected to the side wall of the support frame 2. The inner cylinder 3 is used to filter the moisture in the coal sample.

[0024] The filter cylinder 4 is sleeved on the outside of 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 to screen the coal sample.

[0025] The outer cylinder 5 is fitted outside the filter cylinder 4 and is used to output the screened coal sample.

[0026] Screw 6, there are multiple screws 6, and multiple screws 6 are fixedly connected to the inner ring wall of the inner cylinder 3, the filter cylinder 4, and the outer cylinder 5 respectively.

[0027] The drive mechanism is mounted on the support frame 2 and is used to drive the inner cylinder 3, filter cylinder 4, and outer cylinder 5 to rotate.

[0028] The water circulation mechanism is located at the bottom of the base 1 and is used to collect the filtered water in the coal sample.

[0029] A horizontally arranged fixing 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 fixing plate 7. An inclined 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 3.

[0030] There are at least two filter cylinders 4, and multiple filter cylinders 4 are nested together. Filter holes 10 are provided on the inner cylinder 3 and multiple filter cylinders 4. The pore size of the filter holes 10 on the inner cylinder 3 and filter cylinders 4 gradually increases from the inside to the outside.

[0031] A water collection and drainage plate 11 is fixedly connected to the lower end of the inner cylinder 3. The lower end of the water collection and drainage plate 11 is fixedly connected to the side wall of the support frame 2. An arc-shaped water guide groove 12 is provided on the inner ring wall of the water collection and drainage plate 11. A layer of filter cloth is fixedly connected to the outer wall of the inner cylinder 3. The filter cloth facilitates the filtration of water in the coal sample, so that the water in the coal sample can seep downward into the arc-shaped water guide groove 12 through the filter cloth, thereby facilitating the collection and recycling of water in the coal sample.

[0032] The support frame 2 has a drainage hole 13 on its side wall, and the arc-shaped water guide groove 12 is connected to the drainage hole 13.

[0033] The upper end face of the water discharge plate 11 is provided with 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 moisture remaining on the surface of the coal sample, thereby further reducing the moisture content inside the coal sample.

[0034] 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 its side wall is in contact with the outer ring wall of the absorbent cotton 14. The L-shaped plate 15 is used to squeeze out the water in the absorbent cotton 14. The L-shaped plate 15 is matched with the drain hole 13. A water discharge hole is opened on the side wall of the support frame 2. The water discharge hole is connected to the drain hole 13 and is matched with the L-shaped plate 15. When the L-shaped plate 15 squeezes out the water in the absorbent cotton 14, the squeezed water flows down through the L-shaped plate 15 into the water discharge hole and is discharged through the drain hole 13. The L-shaped plate 15 is parallel to the inner cylinder 3. The length of the absorbent cotton 14 is less than the length of the inner cylinder 3.

[0035] Both the inner cylinder 3 and the filter cylinder 4 are provided with fixing rods 16 on their outer sides. The fixing rods 16 are fixedly connected to the side wall of the support frame 2 at an angle and are parallel to the inner cylinder 3. Brush bristles 17 are fixedly connected to the circumferential wall of the fixing rods 16. The ends of the brush bristles 17 are in contact with the outer ring walls of the inner cylinder 3 and the filter cylinder 4, respectively. The brush bristles 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 clogging the holes on the inner cylinder 3 and the filter cylinder 4, thus ensuring the screening efficiency of the coal sample. One side of the brush bristles 17 of the fixing rod 16 located between the outer wall of the filter cylinder 4 and the inner wall of the outer cylinder 5 is in contact with the inner wall of the outer cylinder 5, so that the brush bristles 17 can clean the coal sample adhering to the inner wall of the outer cylinder 5. The length of the fixing rod 16 is equal to the length of the outer cylinder 5.

[0036] Heating pipes 18 are symmetrically arranged on the outer sides of the inner cylinder 3 and the filter cylinder 4. The heating pipes 18 are parallel to the inner cylinder 3 and are fixedly connected to the support frame 2. The heating pipes 18 are used to heat the inner cylinder 3 and the filter cylinder 4 to promote the evaporation of moisture in the coal sample. A heat-conducting pipe is sleeved on the outer side of the heating pipe 18. The heat-conducting pipe is used to dissipate the heat on the heating pipe 18 to the outside, thereby baking the inner cylinder 3 and the filter cylinder 4. The heat is then transferred to the coal sample through the inner cylinder 3 and the filter cylinder 4, thereby promoting the evaporation of moisture in the coal sample. At the same time, it can also promote the evaporation of residual moisture on the inner cylinder 3 and the filter cylinder 4.

[0037] The drive mechanism includes a drive motor 19, which is fixedly connected to the side wall of the support frame 2.

[0038] 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 gear 20 is located inside the outer cylinder 5 and outside the inner cylinder 3 and filter cylinder 4, and one end of the rotating shaft 21 is fixedly connected to the output shaft of the drive motor 19.

[0039] There are multiple internal gear rings 22, and the multiple internal gear rings 22 are respectively fixedly connected to the inner ring wall of the outer cylinder 5 and the filter cylinder 4. The internal gear rings 22 mesh with the gear 20.

[0040] There are multiple external toothed rings 23, which are fixedly connected to the outer ring wall of the filter cylinder 4 and the inner cylinder 3 respectively. The external toothed rings 23 mesh with the gear 20. The threads of two adjacent augers 6 are opposite, so that the gear 20 drives the inner toothed ring 22 and the external toothed ring 23 in contact with it to rotate, thereby driving the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5 to rotate. The augers 6 in the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5 rotate in the same direction as the rotation, so that the augers 6 can transport the upper part of the coal sample in the inner cylinder 3, the filter cylinder 4 and the outer cylinder 5.

[0041] The water circulation mechanism includes a water tank 24, which is fixedly connected to the base 1.

[0042] 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 communicates with the water tank 24.

[0043] Water pump 26 is fixedly connected to the bottom of water tank 24. Water supply pipe 27 is fixedly connected to water pump 26 and cooperates with outer cylinder 5.

[0044] 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. Both the support frame 2 and the side wall of the protective cover 28 are provided with multiple discharge holes 29 distributed from top to bottom. A coal sample guide plate 30 is fixedly connected to the bottom of the discharge hole 29. The length of the multiple coal sample guide plates 30 gradually decreases from top to bottom. The protective cover 28 can prevent the dust generated by the coal sample during the process of falling into the coal sample loading box 32 from flying into the air, thereby reducing the pollution of the air by the dust generated by the coal sample during the fall. The longitudinal section of the coal sample guide plate 30 is arc-shaped, and the end of the coal sample guide plate 30 away from the discharge hole 29 is inclined downward, so as to facilitate the coal sample to fall downward through the coal sample guide plate 30.

[0045] An arc-shaped guide plate 31 is fixedly connected to the lower end face of the coal sample outlet plate 30. The two adjacent arc-shaped guide plates 31 extend in opposite directions. A coal sample loading box 32 is provided at the end of the arc-shaped guide plate 31 away from the coal sample outlet plate 30. The bottom of the coal sample loading box 32 is in contact with the upper surface of the base 1. The protective cover 28 is open on the side opposite to the end of the arc-shaped guide plate 31. The opening of the protective cover 28 is rotatably connected to a cover plate, which makes it easy to place the coal sample loading box 32 on the base 1 and also makes it easy to take out the coal sample loading box 32.

[0046] A ventilation duct 33 is fixedly connected to the top of the protective cover 28. A water storage box 34 is fixedly connected to the outer ring wall of the ventilation duct 33. The upper end of the water supply 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. The water supply pipe 27 and the water storage box 34 are connected.

[0047] Multiple nozzles 35 arranged in a ring are fixedly connected to the inner wall of the ventilation duct 33. The nozzles 35 are connected to the water storage box 34. The ventilation duct 33 can increase the ventilation efficiency inside the protective cover 28. At the same time, the water in the water storage box 34 is sprayed out in a mist through the nozzles 35, thereby preventing the dust inside the protective cover 28 from spreading to the outside through the ventilation duct 33.

[0048] A first connecting ring 36 is fixedly connected to the lower end of the outer cylinder 5. A protective cylinder 37 is fixed 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. Multiple annularly distributed drain outlets are provided on the side wall of the condensation chamber 38 away from the outer cylinder 5. The drain outlets are connected to the annular collection box 46. When water vapor condenses into water droplets in the condensation chamber 38, the water droplets fall downwards through the inclined surface of the condensation chamber 38 to the bottom of the condensation chamber 38, and then drain into the annular collection box 46 through the drain outlets, thereby realizing the collection of water vapor condensed into water droplets.

[0049] Ventilation holes 39 are provided 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 protective cloth 40 is made of wear-resistant and breathable material, which allows water vapor in the outer cylinder 5 to enter the condensation chamber 38 through the protective cloth 40. At the same time, it can prevent the coal sample in the outer cylinder 5 from falling downward into the condensation chamber 38 through the ventilation holes 39.

[0050] The upper end face of the protective cylinder 37 is rotatably connected to 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 provided on the second connecting ring 41. A strip-shaped through hole 43 is provided 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 connecting pipe 44 is fixedly connected to the side wall of the arc-shaped groove 42. The second connecting pipe 44 is connected to the water storage box 34.

[0051] The lower end of the strip-shaped through hole 43 is connected to the water tank 24 through the drain pipe 45. The lower end of the protective cylinder 37 is rotatably connected to the annular collection box 46. The side wall of the annular collection box 46 is fixedly connected to the side wall of the support frame 2. The lower end of the protective cylinder 37 is provided with a circular through hole, which is connected to the strip-shaped through hole 43. The strip-shaped through hole 43 is connected to the annular collection box 46 through the circular through hole. The upper end of the drain pipe 45 is fixedly connected to the bottom of the annular collection box 46, and the lower end of the drain pipe 45 is fixedly connected to the top of the water tank 24. The annular collection box 46 is connected to the water tank 24 through the drain pipe 45.

[0052] Working principle: The coal sample enters the inclined inner cylinder 3 through the feed funnel 8. The drive motor 19 is started, and its output shaft drives one of the gears 20 to rotate. This gear 20, through meshing with the inner gear ring 22 and the outer gear ring 23, drives the outer cylinder 5, the filter cylinder 4, and the inner cylinder 3 to rotate, and also drives the auger 6 to rotate. During the rotation of the outer cylinder 5, the filter cylinder 4, and the inner cylinder 3, the coal sample tumbles within the inner cylinder 3 and is pushed upwards by the auger 6. The moisture contained in the coal sample located at the lower end of the inner cylinder 3 is released through... The filter cloth seeps into the arc-shaped water guide groove 12, and then flows downward into the water tank 24 through the drain hole 13 and the first connecting pipe 25. Meanwhile, 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. The squeezed-out moisture flows downward through the inclined surface of the L-shaped plate 15 into the water discharge hole on the support frame 2, and then flows into the water tank 24 through the drain hole 13 and the first connecting pipe 25. This realizes the recycling of moisture in the coal sample, thereby reducing the waste of water resources.

[0053] The coal sample in the inner cylinder 3 enters the first 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 pushed to the outer filter cylinder 4 by the auger 6. Since there are multiple filter cylinders 4, and the pore size of the filter holes 10 on the multiple filter cylinders 4 gradually decreases from the inside to the outside, the coal sample with the smaller particle size falls down through the holes on the filter cylinder 4 in sequence. The smallest coal sample enters the outer cylinder 5 and is discharged, while the largest coal sample 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.

[0054] During the rotation of the inner cylinder 3, filter cylinder 4, and outer cylinder 5, when the side walls of the inner cylinder 3, filter cylinder 4, and 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 filter cylinder 4 and inside the filter holes 10. This not only prevents the filter holes 10 from becoming clogged, but also prevents the coal sample from adhering to the side walls of the inner cylinder 3 and filter cylinder 4. When the inner wall of the outer cylinder 5 comes into contact with the bristles 17 during rotation, the bristles 17 clean the inner wall of the outer cylinder 5, preventing the coal sample from adhering to the inner side wall of the outer cylinder 5.

[0055] During the process of the coal sample being transported upwards by the auger 6 on the inner cylinder 3, the heating pipe 18 heats the inner cylinder 3, filter cylinder 4, and outer cylinder 5, allowing the inner cylinder 3, filter cylinder 4, and outer cylinder 5 to transfer heat to the coal sample inside, thereby increasing the temperature of the coal sample and accelerating the evaporation of moisture in the coal sample. The water vapor evaporates upwards through the filter holes 10 and the vent 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, causing the moisture inside the protective cloth 40 to evaporate upwards and enter 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 supply pipe 27, so that the water in the water storage box 34 is sprayed out in a mist through the nozzle 35, and part of the water is transported to the arc-shaped groove 42 through the second connecting pipe 44. The water then flows through the arc-shaped groove 42 into the strip-shaped through-hole 43, where the water flow carries away the heat from the side wall of the strip-shaped through-hole 43, thereby reducing the temperature of the side wall of the strip-shaped through-hole 43 and indirectly reducing the temperature of the protective cylinder 37. When the water vapor comes into contact with the side wall of the condensation chamber 38, the temperature of the inner ring wall of the protective cylinder 37 is lower than that of the water vapor, making it easier for the water vapor to condense into water droplets and slide down the inner ring wall of the protective cylinder 37 to the bottom of the condensation chamber 38. The water then enters the annular collection box 46 through the drain outlet at the bottom of the condensation chamber 38, thus collecting the water vapor inside the outer cylinder 5 and reducing the humidity inside the outer cylinder 5, which is conducive to the drying of the coal sample. The protective cylinder 37 is made of a thermally conductive material, which facilitates the water flow to carry away the heat from the side wall of the protective cylinder 37, improving the condensation effect of the water vapor.

[0056] When coal samples of different particle sizes fall through the discharge hole 29 into the corresponding coal sample guide plate 30, and are guided into the corresponding coal sample loading box 32 by the arc-shaped guide plate 31, the dust generated inside the protective cover 28 when the coal sample falls into the air and flies upward through the ventilation duct 33, the nozzle 35 sprays water from the water storage box 34 in a mist, thereby increasing the weight of the upward-flying dust through the water mist, which facilitates the settling of the coal sample dust and prevents the dust from flying out, thus achieving the purpose of dust reduction.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An automatic coal sample screening device, comprising a base (1), wherein an inclined support frame (2) is fixedly connected to the upper surface of the base (1), characterized in that, Also includes: Inner cylinder (3), which is rotatably connected to the side wall of the support frame (2), is used to filter the moisture in the coal sample; The filter cylinder (4) is sleeved on the outside of the inner cylinder (3), and the end of the filter cylinder (4) is rotatably connected to the support frame (2). The filter cylinder (4) is used to screen the coal sample. The outer cylinder (5) is fitted on the outside of the filter cylinder (4) and is used to output the screened coal sample. Screw (6), there are multiple screws (6), and the multiple screws (6) are respectively fixedly connected to the inner ring wall of the inner cylinder (3), the filter cylinder (4), and the outer cylinder (5); A drive mechanism is provided on a support frame (2) and is used to drive the inner cylinder (3), filter cylinder (4), and outer cylinder (5) to rotate. A water circulation mechanism is provided at the bottom of the base (1) and is used to collect the filtered water in the coal sample. A horizontally arranged fixing 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 fixing plate (7). An inclined 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 (3). There are at least two filter cylinders (4), and multiple filter cylinders (4) are nested together. Filter holes (10) are provided on both the inner cylinder (3) and the multiple filter cylinders (4). The aperture value of the filter holes (10) on the inner cylinder (3) and the filter cylinders (4) gradually increases from the inside to the outside. The lower end of the inner cylinder (3) is fixedly connected to a water discharge plate (11), the lower end of which is fixedly connected to the side wall of the support frame (2), and an arc-shaped water guide groove (12) is provided on the inner ring wall of the water discharge plate (11). The support frame (2) has a drainage hole (13) on its side wall, and the arc-shaped water guide groove (12) is connected to the drainage hole (13); The upper end face of the water discharge plate (11) is provided with absorbent cotton (14), the absorbent cotton (14) is annular, and the inner ring wall of the absorbent cotton (14) is fixedly connected to the outer ring wall of the inner cylinder (3). 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 its side wall is in contact with the outer ring wall of the absorbent cotton (14). The L-shaped plate (15) is used to squeeze out the water in the absorbent cotton (14) and the L-shaped plate (15) is matched with the drain hole (13).

2. The automatic coal sample screening device according to claim 1, characterized in that, The inner cylinder (3) and the filter cylinder (4) are both provided with fixing rods (16). The fixing rods (16) are fixedly connected to the side wall of the support frame (2) at an angle, and the fixing rods (16) are parallel to the inner cylinder (3). Brush bristles (17) are fixedly connected to the circumferential wall of the fixing rods (16). The ends of the brush bristles (17) are in contact with the outer ring walls of the inner cylinder (3) and the filter cylinder (4), respectively. 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 moisture in the coal sample.

3. The automatic coal sample screening device according to claim 2, characterized in that, The drive mechanism includes: A drive motor (19) is fixedly connected to the side wall of the support frame (2); 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 (5), the gear (20) is located outside the inner cylinder (3) and the filter cylinder (4), and one end of the rotating shaft (21) is fixedly connected to the output shaft of the drive motor (19); Internal gear ring (22), there are multiple internal gear rings (22), and multiple internal gear rings (22) are respectively fixedly connected to the inner ring wall of the outer cylinder (5) and the filter cylinder (4), and the internal gear ring (22) meshes with the gear (20); External toothed ring (23), there are multiple external toothed rings (23), and multiple external toothed rings (23) are respectively fixedly connected to the outer ring wall of the filter cylinder (4) and the inner cylinder (3), and the external toothed rings (23) mesh with the gear (20).

4. The automatic coal sample screening device according to claim 3, characterized in that, The water circulation mechanism includes: Water tank (24), which is fixedly connected to base (1); 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 communicates with the water tank (24). A water pump (26) is fixedly connected to the bottom of a water tank (24). 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).

5. The automatic coal sample screening device according to claim 4, characterized in that, 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). Both the support frame (2) and the side wall of the protective cover (28) are provided with multiple discharge holes (29) distributed from top to bottom. A coal sample outlet plate (30) is fixedly connected to the bottom of the discharge hole (29). The length values ​​of the multiple coal sample outlet plates (30) gradually decrease from top to bottom. An arc-shaped guide plate (31) is fixedly connected to the lower end face of the coal sample outlet plate (30). The two adjacent arc-shaped guide plates (31) extend in opposite directions. A coal sample loading box (32) is provided at one end of the arc-shaped guide plate (31) away from the coal sample outlet plate (30). The bottom of the coal sample loading box (32) is in contact with the upper surface of the base (1).

6. The automatic coal sample screening device according to claim 5, characterized in that, The top of the protective cover (28) is fixedly connected to a ventilation duct (33), and a water storage box (34) is fixedly connected to the outer ring wall of the ventilation duct (33). The upper end of the water supply 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 supply pipe (27) and the water storage box (34) are connected. Multiple nozzles (35) arranged in a ring are fixedly connected to the inner wall of the ventilation duct (33), and the nozzles (35) are connected to the water storage box (34).

7. The automatic coal sample screening device according to claim 6, characterized in that, The lower end of the outer cylinder (5) is fixedly connected to a first connecting ring (36), and a protective cylinder (37) is fixed on 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). The outer cylinder (5) has ventilation holes (39) on its side wall and a protective cloth (40) is fixedly connected to the outer ring wall of the outer cylinder (5). The upper end face of the protective cylinder (37) is rotatably connected to 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). The second connecting ring (41) is fixedly connected to the support frame (2). An arc groove (42) is provided on the second connecting ring (41). A strip-shaped through hole (43) is provided on the side wall of the protective cylinder (37). The strip-shaped through hole (43) is matched with the arc groove (42). A second connecting pipe (44) is fixedly connected to the side wall of the arc groove (42). The second connecting pipe (44) is connected to the water storage box (34). The lower end of the strip-shaped through hole (43) is connected to the water tank (24) through a drainage pipe (45).

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