Automatic sampling device for flotation fine particle clean coal muddy water

Abstract

The utility model relates to the technical field of clean coal sampling, in particular to an automatic sampling device for flotation fine particle clean coal muddy water, which comprises an east group of flotation collection pipelines, a middle group of flotation collection pipelines and a west group of flotation collection pipelines, a storage tank is arranged on a support frame, and three groups of flotation feed liquid collection branches are arranged on the storage tank. The three groups of flotation feed liquid collecting branches are correspondingly communicated with the east group of flotation collecting pipelines, the middle group of flotation collecting pipelines and the west group of flotation collecting pipelines respectively; the discharge three-way pipe is respectively communicated with the storage tank, the flotation refined coal mine feed liquid discharge pipe and the flotation refined coal mine feed liquid sampling pipe, and the flotation refined coal mine feed liquid sampling pipe is provided with a sampling port; the feed liquid collecting mechanism comprises a rotary disc, a rotary disc driving assembly and a material taking barrel, the rotary disc driving assembly is installed on the supporting frame, the rotary disc driving mechanism is connected with the rotary disc, and the material taking barrel is arranged on the rotary disc. According to the utility model, the accuracy of material liquid sampling is improved, the labor intensity of workers is reduced, and safety accidents in the sampling process are reduced.

Description

Technical Field

[0001] This utility model relates to the field of clean coal sampling technology, and in particular to an automatic sampling device for flotation fine particle clean coal slurry. Background Technology

[0002] Currently, the main coal separation process both domestically and internationally is gravity media separation. For the processing of -0.5mm fine coal, flotation is commonly used. Taking Tangshan coal mine as an example, flotation concentrate accounts for approximately 13% of the washed coal. Therefore, the ash content of the flotation concentrate directly affects the yield and quality of the clean coal product. If the ash content of the flotation concentrate is too high, the overall clean coal quality will be too low, leading to the loss of fine-particle clean coal and impacting the efficiency of coal washing production. Therefore, a suitable ash content in the flotation concentrate can maximize the yield and quality of the overall clean coal, ensuring enterprise profits. Thus, the sampling and analysis of flotation concentrate during the production process, ensuring the accuracy, timeliness, and representativeness of the data, becomes a crucial and paramount step in guiding flotation production.

[0003] In the flotation process of coal washing plants in mountain mines, to ensure normal production, it is necessary to collect slurry samples from the flotation machine for analysis and testing. This analysis serves as the basis for adjusting production process parameters. Among the factors affecting concentrate quality, the particle size of the flotation concentrate is particularly important, and the representativeness of the collected slurry samples is a key influencing factor in the analysis. During flotation machine operation, samples must be collected from the middle of the discharge port of the flotation machine's scraper mechanism. Simultaneously, it is necessary to avoid contamination from the defoaming spray mechanism of the flotation machine, and more importantly, to avoid contamination from the rotating motor impeller and flotation scraper to ensure personal safety. Currently, manual sampling is generally used. Workers often use traditional sample spoons to extract concentrate, that is, every 1-2 hours during production, a depth probe is used to manually sample the coal slurry, and then the particle size of the flotation concentrate is observed by visual inspection and touch to determine if it is normal. However, this method has the following drawbacks:

[0004] 1. Manual testing involves a large workload. Each test requires a person to manually hold a sampling spoon about 4 meters long, and the sampling spoon must be rinsed with clean water each time.

[0005] 2. The accuracy of manual testing is unstable, varies from person to person, and is subject to subjectivity;

[0006] 3. Because the clean coal liquid at the discharge ends of the three flotation stages is different, the detection accuracy is easily affected when using a single outlet.

[0007] 4. Manual inspection carries the risk of the sampling probe or scoop falling into the receiving trough. If it falls into the receiving trough, it may cause pipe blockage and damage to the horizontal centrifuge, or other process accidents.

[0008] 5. It cannot achieve online real-time detection and online control; the data provided by the detection is intermittent, and there is a lag in the adjustment of the dosing.

[0009] 6. Due to the large flow rate, the slurry flow velocity is unstable, and fine particles in the slurry are easily washed away during slurry clarification. This not only makes sampling inconvenient and unsafe, but also results in inaccurate sample quality. Utility Model Content

[0010] To address the aforementioned technical problems, this utility model provides an automatic sampling device for fine coal slurry from flotation, thereby avoiding the uncertainty in detection accuracy caused by the different material liquids at the three flotation outlets when sampling from a single outlet.

[0011] To achieve this technical objective, the present invention adopts the following solution:

[0012] An automatic sampling device for fine coal slurry from flotation includes an east group flotation collection pipeline, a middle group flotation collection pipeline, and a west group flotation collection pipeline. It also includes a support frame, a storage tank, and a discharge tee. The storage tank is placed on the support frame and is equipped with three sets of flotation liquid collection branches. The three sets of flotation liquid collection branches are respectively connected to the east group flotation collection pipeline, the middle group flotation collection pipeline, and the west group flotation collection pipeline.

[0013] The first end of the discharge tee is connected to the storage tank, the second end is connected to the discharge pipe of the flotation concentrate ore liquid, and the third end is connected to one end of the flotation concentrate ore liquid sampling pipe. The other end of the flotation concentrate ore liquid sampling pipe is equipped with a sampling port.

[0014] It also includes a liquid collection mechanism, which includes a turntable, a turntable drive assembly, and a material collection cylinder. The turntable drive assembly is mounted on a support frame, the turntable drive mechanism is connected to the turntable, and the material collection cylinder is placed on the turntable and below the sampling port.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention improves the accuracy of material sampling by setting up three sets of flotation material collection branches to mix the material in the east, middle and west flotation collection pipelines in a storage tank, and then sampling and testing it through the flotation concentrate coal material sampling pipe. Furthermore, the sampling process does not require manual sampling, reducing the labor intensity of workers and lowering the incidence of safety accidents during the sampling process.

[0017] Furthermore, the preferred embodiment adopted by this utility model is:

[0018] The second end of the discharge tee is connected to the discharge pipe of the flotation concentrate coal liquid via a pneumatic valve; the third end of the discharge tee is connected to the sampling pipe of the flotation coal liquid via a pneumatic valve.

[0019] Each flotation feed collection branch is equipped with a flow regulating valve.

[0020] The turntable drive mechanism includes a drive unit and a ratchet resetter. The drive unit includes a cylinder body, with piston one and piston two respectively arranged on both sides inside the cylinder body. Rack one and rack two are respectively arranged at the ends of piston one and piston two, and rack one and rack two are arranged in parallel.

[0021] The ratchet resetter includes a rotating shaft, a ratchet, and a seat. The rotating shaft passes through the cylinder body and is rotatably connected to the cylinder body. The lower part of the rotating shaft is placed inside the cylinder body, and a gear is provided on the lower part of the rotating shaft. The gear is placed between rack one and rack two and meshes with rack one and rack two respectively.

[0022] A ratchet is provided on the upper part of the rotating shaft, and a seat is fitted on the outside of the ratchet. The inner wall of the seat is provided with tooth grooves that match the pawl on the ratchet. The upper and lower ends of the seat are rotatably connected to the rotating shaft. A turntable is installed on the top of the seat.

[0023] A waste liquid collection tray is provided below the turntable, and the bottom of the waste liquid collection tray is connected to the cylinder body; a through hole is opened in the center of the waste liquid collection tray, and the seat sleeve passes through the through hole and is rotatably connected to the waste liquid collection tray.

[0024] An annular baffle is provided on the outer periphery of the upper surface of the turntable, and a discharge hole is provided on the turntable; an annular receiving trough is provided on the upper surface of the waste liquid collection tray corresponding to the position of the discharge hole on the turntable, and a waste discharge pipe is provided below the receiving trough.

[0025] The seat cover is equipped with a damping mechanism on its exterior. The damping mechanism includes a limit seat and a damping sleeve. The damping sleeve is fitted onto the lower part of the seat cover and embedded in the limit seat.

[0026] The damping sleeve has a trapezoidal cross-section that is wider at the top and narrower at the bottom. The limit seat has a conical groove inside, the height of which is greater than the height of the damping sleeve. An adjusting bolt is provided at the top of the limit seat, and the lower end of the adjusting bolt extends into the conical groove and is connected to the damping sleeve through a spring. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 for Figure 1 Side view;

[0029] Figure 3 This is a sectional view of the turntable drive mechanism; in this figure, since it is a half-sectional view, only one rack is shown.

[0030] Figure 4 for Figure 3 Enlarged view of part A;

[0031] Figure 5A schematic diagram of the ratchet pawl and seat;

[0032] The following are marked in the diagram: 1. Storage tank; 101. Flange; 102. Blind flange; 2. Support frame; 3. East group flotation collection pipeline; 4. Middle group flotation collection pipeline; 5. West group flotation collection pipeline; 6. Flotation feed collection branch; 7. Flow regulating valve; 8. Discharge tee; 10. Discharge pipe pneumatic valve; 11. Flotation concentrate feed discharge pipe; 12. Sample pipe pneumatic valve; 13. Flotation concentrate feed sampling pipe; 14. Sampling port; 15. Rotary table; 1501. Annular baffle.

[0033] 16. Drive unit; 1601. Cylinder block; 1602. Cylinder head; 1603. Piston 1; 1604. Piston 2; 1605. Rack 1; 1606. Rack 2; 17. Pick-up cylinder;

[0034] 18. Waste liquid collection tray; 1801. Material receiving trough; 19. Waste discharge pipe;

[0035] 20. Ratchet resetter; 2001. Seat sleeve; 2002. Ratchet; 2003. Pad; 2004. Tooth groove;

[0036] 21. Rotating shaft; 2101. Driving shaft; 2102. Driven shaft; 22. Gear;

[0037] 23. Damping mechanism; 2301. Limit seat; 2302. Damping sleeve; 2303. Conical groove; 2304. Adjusting bolt; 2305. Nut; 2306. Spring. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] An automatic sampling device for fine-particle coal slurry from flotation mainly consists of an east group flotation collection pipeline 3, a middle group flotation collection pipeline 4, a west group flotation collection pipeline 5, a support frame 2, a storage tank 1, a discharge tee pipe 8, and a material collection mechanism. The east group flotation collection pipeline 3, the middle group flotation collection pipeline 4, and the west group flotation collection pipeline 5 are three parallel pipelines.

[0040] The support frame 2 is a symmetrical cuboid frame structure welded from four vertical angle steels and eight horizontal angle steels. A circular arc-shaped support plate is vertically welded to the upper end of the support frame 2. The storage tank 1 is a cylindrical inner cavity barrel. The inner cavity barrel of the storage tank 1 is placed horizontally, and the two ends of the storage tank 1 are respectively placed on the circular arc support plate. Flanges 101 are welded to both ends of the inner cavity barrel of the storage tank 1. Each flange 101 is connected to a blind flange 102 by bolts on its outer side.

[0041] Three sets of flotation liquid collection branches 6 are symmetrically welded to the upper end of the inner cavity of the storage tank 1 along the tangent of the outer cylindrical surface of the storage tank 1. The storage tank 1 is connected to the east flotation collection pipeline 3, the middle flotation collection pipeline 4 and the west flotation collection pipeline 5 through the three sets of flotation liquid collection branches 6 respectively.

[0042] In this embodiment, each set of flotation feed collection branches 6 is also equipped with a flow regulating valve 7 to regulate the flow rate of each branch. Furthermore, each set of flotation feed collection branches 6 can also be equipped with a cleaning solenoid valve connected to an external clean water pipeline. The cleaning solenoid valve is electrically connected to a time relay, which controls the opening and closing of the valve to periodically clean the flotation feed collection branches 6. This prevents pipeline blockage and contamination of online real-time sampling by residual fine-particle flotation coal slime, ensuring sampling accuracy.

[0043] A discharge tee pipe 8 is welded to the bottom of the storage tank 1. The first end of the discharge tee pipe 8 is connected to the inner cavity of the storage tank 1. The second end of the discharge tee pipe 8 is connected to the discharge pipe 11 of the flotation concentrate ore liquid through the discharge pipe pneumatic valve 10. The third end of the discharge tee pipe 8 is connected to one end of the flotation concentrate ore liquid sampling pipe 13 through the sampling pipe pneumatic valve 12. The other end of the flotation concentrate ore liquid sampling pipe is provided with a sampling port 14. In this embodiment, the sampling port 14 is at a 90° angle to the flotation concentrate ore liquid sampling pipe.

[0044] In this embodiment, the pneumatic valve 10 of the discharge pipe and the pneumatic valve 12 of the take-up pipe are electrically connected to a time relay. The opening and closing of the pneumatic valve 10 of the discharge pipe and the pneumatic valve 12 of the take-up pipe are controlled by the time relay, and the pneumatic valve 10 of the discharge pipe and the pneumatic valve 12 of the take-up pipe are timed for sampling.

[0045] The liquid collection mechanism is installed on one side of the support frame 2 via a fixed frame. The liquid collection mechanism consists of a turntable 15, a turntable 15 drive assembly, and a material collection cylinder 17. The turntable 15 drive assembly consists of a drive unit 16 and a ratchet resetter 20. The drive unit 16 includes a cylinder body 1601, which is an aluminum alloy cylinder body 1601. Cylinder covers 1602 are respectively provided at both ends of the cylinder body 1601. Piston 1603 and piston 2 1604 are respectively provided on both sides inside the cylinder body 1601. In this embodiment, the movement of piston 1603 and piston 2 1604 is controlled by electromagnetic pneumatic reversing valves.

[0046] Piston 1603 and Piston 2 1604 are respectively connected to rack 1605 and rack 2 1606 at their ends, and rack 1605 and rack 2 1606 are arranged in parallel. By controlling the extension and retraction of piston 1603 and piston 2 1604, the movement direction of the racks is controlled, thereby controlling the forward and reverse rotation of the rotating shaft 21.

[0047] The ratchet resetter 20 consists of a rotating shaft 21, a ratchet 2002, and a seat 2001. The lower part of the rotating shaft 21 passes through the cylinder 1601 and is placed inside the cylinder 1601, and the rotating shaft 21 is rotatably connected to the cylinder 1601. The rotating shaft 21 consists of a lower drive shaft 2101 and an upper driven shaft 2102. The upper end face of the drive shaft 2101 is provided with an internal hexagonal groove, and the lower end of the driven shaft 2102 is an external square head. The driven shaft 2102 is inserted into the drive shaft 2101. A gear 22 is fixedly connected to the drive shaft 2101. The gear 22 is placed between rack 1605 and rack 2606 and meshes with rack 1605 and rack 2606 respectively.

[0048] The inner circumferential surface of the middle part of the seat sleeve 2001 is milled with toothed grooves 2004. The toothed grooves 2004 are evenly distributed inside the seat sleeve 2001. The seat sleeve 2001 is rotatably connected to the drive shaft 2101 on the upper and lower sides of the toothed grooves 2004 through bearings respectively.

[0049] A ratchet 2002 is fixedly mounted on the driven shaft 2102. A pawl 2003 is provided on the outer circumference of the ratchet 2002. The pawl 2003 is clamped by a ring spring, which can effectively ensure that the pawl 2003 has a long-term reliable elastic force. When the rotating shaft 21 rotates in the forward direction, the pawl 2003 is inserted into the tooth groove 2004. The pawl 2003 and the tooth groove 2004 are tightly engaged, which drives the seat 2001 to rotate in the forward direction. When the rotating shaft 21 rotates in the reverse direction, the tip of the pawl 2003 slides across the tooth groove 2004. In this embodiment, the rotation angle of the rotating shaft 21 in each forward and reverse rotation is a multiple of the tooth pitch angle of the tooth groove 2004, so that the pawl moves relatively smoothly when entering and disengaging, can accurately control the rotation angle of the seat 2001, and has the function of unidirectional intermittent torque transmission.

[0050] The top of the seat cover 2001 is fixedly connected to the bottom center of the turntable 15. Four sampling cylinders 17 arranged in a circular array are detachably installed on the upper surface of the turntable 15. The four sampling cylinders 17 are evenly distributed around the center of the turntable 15. An annular baffle 1501 is provided on the outer periphery of the upper surface of the turntable 15 to prevent spilled liquid from being thrown out. A discharge hole is provided on the turntable 15.

[0051] A waste liquid collection tray 18 is provided below the turntable 15. The bottom of the waste liquid collection tray 18 is fixed to the top of the cylinder body 1601 by a mounting bracket. A through hole is opened in the center of the waste liquid collection tray 18, and the seat sleeve 2001 passes through the through hole and is rotatably connected to the waste liquid collection tray 18. An annular receiving trough 1801 is provided on the upper surface of the waste liquid collection tray 18 at the position of the discharge hole on the turntable 15. A waste discharge pipe 19 is provided at the bottom of the receiving trough 1801. When sampling the flotation concentrate coal slurry, the rotation of the tray may cause the slurry in the sampling cylinder 17 to spill onto the turntable 15. The slurry on the turntable 15 enters the receiving trough 1801 through the discharge hole and is discharged uniformly by the waste discharge pipe 19 to prevent coal slurry water from polluting the surrounding environment.

[0052] When the seat sleeve 2001 rotates in the forward direction, due to the rotational inertia force generated, the seat sleeve 2001 may continue to displace due to inertia after the driven shaft 2102 stops rotating. To avoid this situation, a damping mechanism 23 is provided on the outside of the seat sleeve 2001. The damping mechanism 23 consists of a limiting seat 2301 and a damping sleeve 2302. The damping sleeve 2302 is an annular sleeve that contacts the outer surface of the seat sleeve 2001, generating resistance to the rotation of the seat sleeve 2001. The cross-section of the damping sleeve 2302 is a trapezoidal structure that is wider at the top and narrower at the bottom. The limiting seat 2301 has a conical groove 2303 inside that is adapted to the damping sleeve 2302, and the conical groove 2303 is... The height of the conical groove 2303 is greater than the height of the damping sleeve 2302. A bolt hole is provided at the top of the limiting seat 2301, and an adjusting bolt 2304 is installed in the bolt hole. The upper part of the adjusting bolt 2304 is threaded to a nut 2305 outside the limiting seat 2301, and the lower end of the adjusting bolt 2304 is connected to the damping sleeve 2302. When the damping sleeve 2302 is connected to the adjusting bolt 2304, a groove is provided on the damping sleeve 2302. The lower end of the adjusting bolt 2304 is placed in the groove and can rotate within it. A spring 2306 is also fitted onto the lower part of the adjusting bolt, and the spring 2306 is positioned between the groove and the top of the conical groove 2303. The frictional contact between the damping sleeve 2302 and the outer surface of the seat 2001 generates resistance on the seat 2001, ensuring that the angle of engagement between the toothed groove 2004 and the pawl 2003 does not shift, thereby enabling the sampling cylinder 17 to be accurately aligned with the sampling port 14.

[0053] In this embodiment, the damping force generated by the damping sleeve 2302 on the seat sleeve 2001 can be adjusted by adjusting the tightness of the damping sleeve 2302 by the adjusting bolt 2304.

[0054] When the device is in use and no sampling is being performed, the pneumatic valve 10 of the discharge pipe is open, and the pneumatic valve of the sampling pipe is closed. The flotation concentrate from the East Flotation Collection Pipeline 3, the Middle Flotation Collection Pipeline 4, and the West Flotation Collection Pipeline 5 enters the storage tank 1 through the three flotation concentrate collection branches 6 and is then mixed. The mixture is then transported to the concentrate box through the flotation concentrate discharge pipe 11. After one hour of continuous feeding from the flotation concentrate discharge pipe 11 to the concentrate box, the electromagnetic coil is activated, the pneumatic reversing valve actuates, and pistons 1603 and 1604 extend, driving the drive shaft 2101 to rotate 90 degrees forward. °, the drive shaft 2101 drives the driven shaft 2102 to rotate in the forward direction, thereby causing the pawl 2003 to mesh tightly with the tooth groove 2004. The pawl 2003 pushes the seat sleeve 2001 to rotate, and the turntable 15 rotates 90° with the seat sleeve 2001, so that the sampling cylinder 17 is exactly below the sampling port 14. The pneumatic valve 10 of the discharge pipe is closed, and the pneumatic valve of the sampling pipe is opened. The flotation concentrate coal slurry is discharged from the sampling port 14 through the flotation coal slurry sampling pipe and flows into the sampling cylinder 17. The pneumatic valve of the sampling pipe closes after a delay of 2-4 seconds, and the pneumatic valve 10 of the discharge pipe is opened to continue discharging. This is repeated, and a sample is taken once every hour of material feeding.

[0055] In this embodiment, when the electromagnetic coil is energized, the electromagnetic pneumatic reversing valve actuates, causing piston 1603 and piston 2604 to extend and drive the drive shaft 2101 to rotate 90° in the forward direction. Then, the electromagnetic coil is de-energized, piston 1603 and piston 2604 retract, and the rack meshes with gear 22 to drive the drive shaft 2101 to rotate 90° in the reverse direction. Consequently, the driven wheel drives the ratchet 2002 to rotate in the reverse direction as well. The pawl 2003 slides in the reverse direction through the ratchet groove 2004 and disengages, thus completing the function of automatic reset during the idle stroke.

[0056] This utility model employs mechanical, pneumatic, and electrical control to achieve automatic sampling. It features a compact structure and precise transmission. By using a time relay to set the sampling time interval and sampling capacity after startup, it achieves online real-time detection, ensuring the continuity and accuracy of the detection data and avoiding the delays associated with chemical dosing adjustments. It reduces the workload, time-consuming nature, and labor-intensive nature of manual detection, eliminating subjective biases inherent in manual testing. Simultaneously, it avoids the uncertainty that can affect detection accuracy in single-port sampling, ensuring the economic efficiency of coal washing production and the safe and stable operation of the system.

[0057] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. An automatic sampling device for fine-particle coal slurry from flotation, comprising an east group flotation collection pipeline, a middle group flotation collection pipeline, and a west group flotation collection pipeline, characterized in that: It also includes a support frame, a storage tank and a discharge tee pipe. The storage tank is placed on the support frame and is equipped with three sets of flotation liquid collection branches. The three sets of flotation liquid collection branches are respectively connected to the flotation collection pipeline of the east group, the flotation collection pipeline of the middle group and the flotation collection pipeline of the west group. The first end of the discharge tee is connected to the storage tank, the second end is connected to the discharge pipe of the flotation concentrate ore liquid, and the third end is connected to one end of the flotation concentrate ore liquid sampling pipe. The other end of the flotation concentrate ore liquid sampling pipe is equipped with a sampling port. It also includes a liquid collection mechanism, which includes a turntable, a turntable drive assembly, and a material collection cylinder. The turntable drive assembly is mounted on a support frame, the turntable drive mechanism is connected to the turntable, and the material collection cylinder is placed on the turntable and below the sampling port.

2. The automatic sampling device for flotation fine particle clean coal slurry water according to claim 1, characterized in that: The second end of the discharge tee is connected to the discharge pipe of the flotation concentrate coal liquid via a pneumatic valve; the third end of the discharge tee is connected to the sampling pipe of the flotation coal liquid via a pneumatic valve.

3. The automatic sampling device for flotation fine particle clean coal slurry water according to claim 1, characterized in that: Each flotation feed collection branch is equipped with a flow regulating valve.

4. The automatic sampling device for flotation fine particle clean coal slurry water according to claim 1, characterized in that: The turntable drive mechanism includes a drive unit and a ratchet resetter. The drive unit includes a cylinder body, with piston one and piston two respectively arranged on both sides inside the cylinder body. Rack one and rack two are respectively arranged at the ends of piston one and piston two, and rack one and rack two are arranged in parallel. The ratchet resetter includes a rotating shaft, a ratchet, and a seat. The rotating shaft passes through the cylinder body and is rotatably connected to the cylinder body. The lower part of the rotating shaft is placed inside the cylinder body, and a gear is provided on the lower part of the rotating shaft. The gear is placed between rack one and rack two and meshes with rack one and rack two respectively. A ratchet is provided on the upper part of the rotating shaft, and a seat is fitted on the outside of the ratchet. The inner wall of the seat is provided with tooth grooves that match the pawl on the ratchet. The upper and lower ends of the seat are rotatably connected to the rotating shaft. A turntable is installed on the top of the seat.

5. The automatic sampling device for flotation fine-particle clean coal slurry water according to claim 4, characterized in that: A waste liquid collection tray is provided below the turntable, and the bottom of the waste liquid collection tray is connected to the cylinder body; a through hole is opened in the center of the waste liquid collection tray, and the seat sleeve passes through the through hole and is rotatably connected to the waste liquid collection tray.

6. The automatic sampling device for flotation fine particle clean coal slurry water according to claim 5, characterized in that: An annular baffle is provided on the outer periphery of the upper surface of the turntable, and a discharge hole is provided on the turntable; an annular receiving trough is provided on the upper surface of the waste liquid collection tray corresponding to the position of the discharge hole on the turntable, and a waste discharge pipe is provided below the receiving trough.

7. The automatic sampling device for flotation fine particle clean coal slurry water according to claim 4, characterized in that: The seat cover is equipped with a damping mechanism on its exterior. The damping mechanism includes a limit seat and a damping sleeve. The damping sleeve is fitted onto the lower part of the seat cover and embedded in the limit seat.

8. The automatic sampling device for flotation fine-particle clean coal slurry water according to claim 7, characterized in that: The damping sleeve has a trapezoidal cross-section that is wider at the top and narrower at the bottom. The limit seat has a conical groove inside, the height of which is greater than the height of the damping sleeve. An adjusting bolt is provided at the top of the limit seat, and the lower end of the adjusting bolt extends into the conical groove and is connected to the damping sleeve through a spring.

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