An automatic sampling system for powders

Abstract

The utility model discloses a kind of automatic sampling systems suitable for powder material;The device uses modular design, can realize quantitative sampling, mixing, quantitative shrinkage, double-station sample reservation, the whole automatic sampling process of residual material back to bin, without manual participation;Among them, the feeding machine, the stirring device, the quantitative shrinkage device and the fan are placed inside the box;Effectively isolate the influence of external dust on the equipment, prolong the service life of the equipment, and can be applied to different samples, different space structures, and have the functions of automatic sample collection, bagging and backup.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation sampling technology, and is particularly applicable to automated sampling, mixing, reduction and collection systems for powdery or granular materials. Background Technology

[0002] In the chemical, food, and mining industries, the testing of powder samples is a common process, and accurate sampling is a prerequisite for ensuring the reliability of test results. Currently, the main sampling methods for powder samples include manual sampling and traditional mechanical sampling. The samples are usually manually divided into two parts and poured into sample bags, one for testing and the other for backup and archiving.

[0003] Manual sampling has been phased out due to its drawbacks of low efficiency, poor representativeness, inability to meet the sampling needs of modern industrial production, and safety hazards.

[0004] Traditional mechanical sampling also has limitations. Mechanical sampling suitable for powders or granular materials is generally divided into spiral sampling, flap sampling, or scraping sampling. Among them, spiral sampling devices affect the particle size of granular materials and can only be used for powder sampling. Moreover, all of the above sampling devices can only achieve a single sampling function and cannot perform subsequent processes such as mixing, reducing, collecting and backing up samples, and discarding and returning materials to the storage, thus failing to achieve a fully automated sampling process without human intervention. Most sampling points are located at the chutes below the discharge ports of belt conveyors, scraper conveyors, and screw conveyors, where the spatial structure is not uniform, and dusty working environments are common. Traditional mechanical sampling methods cannot guarantee good applicability to sampling points with different spatial structures, and the equipment's operational stability is poor due to the influence of dusty environments. Therefore, developing a fully automated sampling device that can achieve fully automated operation, ensure sampling accuracy and representativeness, is applicable to dusty environments, different samples, and different spatial structures, and has automatic sample collection, bagging, and backup functions has become an urgent problem to be solved. Summary of the Invention

[0005] This utility model is specifically an automatic sampling system for powder materials; the device adopts a modular design and can realize a fully automatic sampling process of quantitative sampling, mixing, quantitative reduction, dual-station sample retention, and residual material return to the warehouse without manual intervention; the feeding machine (2), stirring device (3), quantitative reduction device (4) and fan (9) are placed inside the box (8); effectively isolating the equipment from the influence of external dust, extending the service life of the equipment, and can be used for different samples and different spatial structures, and has the function of automatic sample collection, bagging and backup.

[0006] The technical solution adopted in this utility model is an automatic sampling system suitable for powder materials, characterized in that: it includes a quantitative sampling device (1), a feeding machine (2), a stirring device (3), a quantitative reduction device (4), a dual-station sample collector (5), a sample retention tube (6), a waste tube (7), a housing (8), a fan (9), and a control system (10); a feed pipe (25); the quantitative sampling device (1) is fixed at the sampling point and is connected to the feeding machine (2) through the feed pipe (25), and the feeding machine (2) is placed in the stirring device (5). 3) Above, a control valve I (28) is provided at the connection between the two. The stirring device (3) is provided with an overflow chute (35), and its overflow port (34) and discharge port (37) are included inside. The bottom of the overflow chute (35) is connected to the waste pipe (7). The quantitative reduction device (4) extends into the waste pipe (7) and is fixed. Its outlet is connected to the dual-station sample collector (5) through the sample retention pipe (6). The feeder (2), stirring device (3), quantitative reduction device (4) and fan (9) are placed inside the box (8).

[0007] The quantitative sampling device (1) includes a sampling port (11), a sampling piston (12), a sampling air hole (13), and a sampling cylinder (14); the sampling cylinder (14) can drive the sampling piston (12) to extend or retract.

[0008] The feeding machine (2) also includes a blowing device (21), control valve I (28), control valve II (22), filter element (24), and air pipe (23); the filter element (24) divides the inside of the feeding machine (2) into cavity I (26) and cavity II (27); the blower (9) is connected to cavity I (26) through air pipe (23) and is equipped with control valve II (22), and the feed pipe (25) is connected to cavity II (27).

[0009] When the feeder (2) is working, control valve II (22) is opened, control valve I (28) is closed, and the blower (9) is started. Negative pressure is generated inside the feeder (2), which causes the air to carry the sample into the cavity II (27) along the feed pipe (25). The filter element (24) separates the air from the sample. The air is discharged through the blower (9) along the air pipe (23), and the sample is stored inside the cavity II (27). After the sample collection is completed, control valve II (22) is closed, control valve I (28) is opened, and the blowing device (21) is started at the same time. The filter element (24) is cleaned by blowing in the form of pulse compressed air, so that the sample adhering to the surface of the filter element (24) falls off and is discharged.

[0010] The stirring device (3) also includes a reducer (31), stirring blades (32), plug (33), overflow port (34), overflow chute (35), and unloading cylinder (36); the reducer (31) drives the stirring blades (32) to rotate and stir the material sample; the plug (33) and the unloading cylinder (36) are connected by threads, and the unloading cylinder (36) can drive the plug (33) to extend or retract. Extending is the blocking state, and retracting is the discharging state. The stirring device (3) is provided with an overflow port (34). When there is too much material sample inside, it can be discharged from the overflow port (34) to prevent the sampling system from being blocked.

[0011] The quantitative reduction device (4) is fixed on the waste pipe (7) and also includes a reduction port (41), a reduction piston (42), a reduction air hole (43), and a reduction cylinder (44); the reduction port (41) is placed inside the waste pipe (7).

[0012] The shrinking cylinder (44) can drive the shrinking piston (42) to extend or retract. When it extends, it can intercept the material flow in the waste pipe (7). When it retracts, the material sample can be discharged by its own gravity.

[0013] The dual-station sample collector (5) also includes an inlet (51), a moving cart (52), an outlet I (53), an outlet II (54), a sample bag (55), a rodless cylinder (56), a sample bag clamp (57), a magnetic block (58), a frame (59), a pulley (510), and a weight sensor (511). The rodless cylinder (56) is fixed to the frame (59). The moving cart (52) is connected to the slider on the rodless cylinder (56) and placed inside the frame (59). The sample bag clamp (57) is equipped with a magnetic block (58), which can fix the sample bag (55) in place by magnetic force.

[0014] The rodless cylinder (56) can drive the moving cart (52) to move left and right inside the frame (59). The bottom of the moving cart (52) is equipped with pulleys (510) to make it move smoothly. When the moving cart (52) is driven to the left limit, the discharge port I (53) coincides with the inlet port (51), and the corresponding sample bag (55) is in the receiving state. When the moving cart (52) is driven to the right limit, the discharge port II (54) coincides with the inlet port (51), and the corresponding sample bag (55) is in the receiving state.

[0015] The beneficial effects of this utility model are:

[0016] This utility model adopts a modular design, in which the feeding machine (2), stirring device (3), quantitative reducing device (4) and fan (9) are all integrated inside a well-sealed box (8), so that it can operate stably in dusty working conditions and effectively extend its service life.

[0017] The present invention provides a quantitative sampling device (1) that is connected to the inside of the box (8) through a feed pipe (25). The quantitative sampling device (1) is small in size and can be installed at any sampling point. The position of the box (8) can be adjusted by adjusting the length of the feed pipe (25). It is not limited by space and has good applicability to various different spatial structures.

[0018] This utility model can realize a fully automated sampling process of quantitative sampling, mixing, quantitative reduction, sample collection, and residual material return to the warehouse without human intervention, thus improving the representativeness of the sampling; the sampling time, sampling frequency, and sample retention time can be set through the control system (10);

[0019] The present invention can be placed in a flexible position as a dual-station sample collector (5). It can be placed on the first floor for easy sample collection. It has two sample bags (55) with fixed positions inside, and a weight sensor (511) is provided below it. The sample weight is adjustable. After the mixed sample is reduced, it falls evenly into the two sample bags (55) to realize the function of one inspection and one backup.

[0020] The stirring blades (32) inside the stirring device (3) of this utility model are made of rubber. The whole system is suitable for sampling powder and granular materials and will not affect the particle size. Attached Figure Description

[0021] Figure 1 This is an installation diagram of an automatic sampling system suitable for powder materials;

[0022] Figure 2 A front view of the internal structure of an automatic sampling system housing (8) suitable for powder materials;

[0023] Figure 3 Rear view of the internal structure of an automatic sampling system housing (8) suitable for powders;

[0024] Figure 4 A schematic diagram of a quantitative sampling device (1) for an automatic sampling system suitable for powder materials;

[0025] Figure 5 A schematic diagram of the structure of a feeder (2) for an automatic sampling system for powder materials;

[0026] Figure 6 A schematic diagram of the structure of a stirring device (3) for an automatic sampling system for powder materials;

[0027] Figure 7 This is a schematic diagram of the structure of a quantitative reduction device (4) and a waste pipe (7) in an automatic sampling system for powder materials;

[0028] Figure 8A schematic diagram of a dual-station sample collector (5) for an automatic sampling system suitable for powder materials;

[0029] In the diagram: 1. Quantitative sampling device, 2. Feeder, 3. Stirring device, 4. Quantitative reduction device, 5. Dual-station sample collector, 6. Sample retention tube, 7. Disposal tube, 8. Housing, 9. Fan, 10. Control system, 11. Sampling port, 12. Sampling piston, 13. Sampling air hole, 14. Sampling cylinder, 21. Purge device, 22. Control valve II, 23. Air pipe, 24. Filter element, 25. Feed pipe, 26. Chamber I, 27. Chamber II, 28. Control valve Ⅰ, 31. Reducer, 32. Agitator blade, 33. Plug, 34. Overflow port, 35. Overflow chute, 36. Discharge cylinder, 37. Discharge port, 41. Reduction port, 42. Reduction piston, 43. Reduction air hole, 44. Reduction cylinder, 51. Feed port, 52. Moving cart, 53. Discharge port Ⅰ, 54. Discharge port Ⅱ, 55. Sample bag, 56. Rodless cylinder, 57. Sample bag clamp, 58. Magnetic block, 59. Frame, 510. Pulley, 511. Weight sensor; Detailed Implementation

[0030] The technical solution adopted in this utility model is an automatic sampling system suitable for powder materials, which includes a quantitative sampling device (1), a feeder (2), a stirring device (3), a quantitative reduction device (4), a dual-station sample collector (5), a sample retention tube (6), a waste tube (7), a housing (8), a fan (9), and a control system (10); a feed pipe (25); the quantitative sampling device (1) is fixed at the sampling point and is connected to the feeder (2) through the feed pipe (25), and the feeder (2) is placed above the stirring device (3). The two are connected by a control valve I (28), the stirring device (3) is equipped with an overflow chute (35), and the overflow port (34) and discharge port (37) inside it are included inside. The bottom of the overflow chute (35) is connected to the waste pipe (7); the quantitative reduction device (4) extends into the waste pipe (7) and is fixed, and its outlet is connected to the dual-station sample collector (5) through the sample retention pipe (6); the feeder (2), stirring device (3), quantitative reduction device (4) and fan (9) are placed inside the box (8).

[0031] The quantitative sampling device (1) includes a sampling port (11), a sampling piston (12), a sampling air hole (13), and a sampling cylinder (14); the sampling cylinder (14) can drive the sampling piston (12) to extend or retract. The feeder (2) also includes a blowing device (21), a control valve I (28), a control valve II (22), a filter element (24), and an air pipe (23); the filter element (24) divides the interior of the feeder (2) into cavity I (26) and cavity II (27); the blower (9) is connected to cavity I (26) through the air pipe (23) and is equipped with control valve II (22), and the feed pipe (25) is connected to cavity II (27). The mixing device (3) also includes a reducer (31), mixing blades (32), plug (33), overflow port (34), overflow chute (35), and unloading cylinder (36); the plug (33) and the unloading cylinder (36) are connected by threads, and the unloading cylinder (36) can drive the plug (33) to extend or retract; the mixing device (3) is provided with an overflow port (34) inside. The quantitative reduction device (4) is fixed on the waste pipe (7), and it also includes a reduction port (41), a reduction piston (42), a reduction air hole (43), and a reduction cylinder (44); the reduction port (41) is placed inside the waste pipe (7). The dual-station sample collector (5) also includes an inlet (51), a moving cart (52), an outlet I (53), an outlet II (54), a sample bag (55), a rodless cylinder (56), a sample bag clamp (57), a magnetic block (58), a frame (59), a pulley (510), and a weight sensor (511). The rodless cylinder (56) is fixed to the frame (59). The moving cart (52) is connected to the slider on the rodless cylinder (56) and placed inside the frame (59). The sample bag clamp (57) is equipped with a magnetic block (58), which can fix the sample bag (55) in place by magnetic force.

[0032] The user needs to set the sampling start time, sampling interval time, stirring time, and sample retention time in the control system (10); when the set sampling time is reached, the control system (10) issues a command, the sampling cylinder (14) drives the sampling piston (12) to extend and enter the sampling state, the material sample falls into the sampling piston (12) through the sampling port (11), and after the sampling piston (12) is full of material sample, the sampling cylinder (14) drives the sampling piston (12) to retract, at this time the control valve II (22) is in the open state, and the control valve I ( 28) When the machine is closed, the blower (9) starts, which creates negative pressure inside the feeder (2) and draws air through the sampling air hole (13) into the feeder (25). The sample in the sampling piston (12) is also drawn into it. The filter element (24) inside the feeder (2) can separate the sample from the air, allowing the air to pass through the filter element (24) into the cavity I (26) and be discharged outside the sampling system along the air pipe (23). The sample will be stored in the cavity II (27), and a small part will adhere to the surface of the filter element (24). After all the material sample is sucked into the feeder (2), the blower (9) stops working, and at the same time, control valve II (22) closes and control valve I (28) opens, so that cavity I (26) is in a sealed state. The material sample inside cavity II (27) flows into the stirring device (3) below it. At the same time, the blowing device (21) starts to blow and clean the filter element (24) in the form of pulse compressed air, so that the material sample adhering to the surface of the filter element (24) is cleaned and falls into the stirring device (3). After the cleaning is completed, the control system (10) opens control valve II (22) and closes control valve I (28), returning to the initial state, thus completing a single sampling action.

[0033] The quantitative sampling device (1) repeats the single sampling action according to the set sampling frequency. The sample taken each time eventually falls into the mixing device (3) for storage. When the set retention time is reached, the control system (10) issues a command to stop the sampling action and start the mixing device (3). The reducer (31) drives the mixing blades (32) to rotate, so that the sample inside is fully mixed. After the set mixing time is reached, the control system (10) issues a command to discharge the gas. The cylinder (36) drives the plug (33) to retract, and the mixed sample is discharged along the discharge port (37) and flows to the field silo along the waste pipe (7); at the same time, the shrinking cylinder (44) drives the shrinking piston (42) to extend and intercept the material flow inside the waste pipe (7). After the sample enters the shrinking piston (42) through the shrinking port (41), the shrinking cylinder (44) drives the shrinking piston (42) to retract, and the sample flows down into the dual-station sample collector (5) along the sample retention pipe (6).

[0034] The moving carriage (52) inside the dual-station sample collector (5) is initially positioned at the left limit. The inlet (51) and outlet I (53) coincide. The condensed sample first flows into the sample bag (55) fixed at outlet I (53). The corresponding weight sensor (511) will sense the weight of the sample in the sample bag (55). When the set weight is reached, the control system (10) issues a command to drive the moving carriage (52) to the right limit, so that the inlet (51) and outlet I (53) coincide. I (53) overlaps, and the condensed sample flows into the fixed outlet II (54) sample bag (55). After reaching the corresponding weight sensor (511) set value, the condensation action stops. After the material inside the stirring device (3) is emptied, the unloading cylinder (36) drives the plug (33) to extend and block the unloading port (37). At the same time, the rodless cylinder (56) drives the moving vehicle (52) to move to the left limit. The sampling system returns to the initial state and enters the standby mode, thus completing one system sampling cycle.

[0035] Sampling personnel only need to go to the installation point at the set retention time and take the two sample bags (55) directly from the dual-station sample collector (5), achieving the effect of one inspection and one backup; eliminating the tedious steps of sampling, mixing, reducing, retaining samples and handling leftover materials, and improving the representativeness of the samples.

Claims

1. An automatic sampling system suitable for powder materials, characterized in that: It includes a quantitative sampling device (1), a feeder (2), a stirring device (3), a quantitative reduction device (4), a dual-station sample collector (5), a sample retention tube (6), a waste tube (7), a housing (8), a fan (9), and a control system (10); a feed pipe (25); the quantitative sampling device (1) is fixed at the sampling point and connected to the feeder (2) through the feed pipe (25). The feeder (2) is placed above the stirring device (3), and a control valve I is provided at the connection between the two. 28) The mixing device (3) is equipped with an overflow chute (35) and includes the overflow port (34) and discharge port (37) inside it. The bottom of the overflow chute (35) is connected to the waste pipe (7). The quantitative reduction device (4) extends into the waste pipe (7) and is fixed. Its outlet is connected to the dual-station sample collector (5) through the sample retention pipe (6). The feeder (2), mixing device (3), quantitative reduction device (4) and fan (9) are placed inside the box (8).

2. The automatic sampling system for powder materials according to claim 1, characterized in that: The quantitative sampling device (1) includes a sampling port (11), a sampling piston (12), a sampling air hole (13), and a sampling cylinder (14); the sampling cylinder (14) can drive the sampling piston (12) to extend or retract.

3. The automatic sampling system for powders according to claim 1, characterized in that: The feeding machine (2) also includes a blowing device (21), control valve I (28), control valve II (22), filter element (24), and air pipe (23); the filter element (24) divides the inside of the feeding machine (2) into cavity I (26) and cavity II (27); the blower (9) is connected to cavity I (26) through air pipe (23) and is equipped with control valve II (22), and the feed pipe (25) is connected to cavity II (27).

4. The automatic sampling system for powders according to claim 3, characterized in that: When the feeder (2) is working, control valve II (22) is opened, control valve I (28) is closed, and the blower (9) is started. Negative pressure is generated inside the feeder (2), which causes the air to carry the sample into the cavity II (27) along the feed pipe (25). The filter element (24) separates the air from the sample. The air is discharged through the blower (9) along the air pipe (23), and the sample is stored inside the cavity II (27). After the sample collection is completed, control valve II (22) is closed, control valve I (28) is opened, and the blowing device (21) is started at the same time. The filter element (24) is cleaned by blowing in the form of pulse compressed air, so that the sample adhering to the surface of the filter element (24) falls off and is discharged.

5. The automatic sampling system for powders according to claim 1, characterized in that: The stirring device (3) also includes a reducer (31), stirring blades (32), plug (33), overflow port (34), overflow chute (35), and unloading cylinder (36); the reducer (31) drives the stirring blades (32) to rotate and stir the material sample; the plug (33) and the unloading cylinder (36) are connected by threads, and the unloading cylinder (36) can drive the plug (33) to extend or retract. Extending is the blocking state, and retracting is the discharging state. The stirring device (3) is provided with an overflow port (34). When there is too much material sample inside, it can be discharged from the overflow port (34) to prevent the sampling system from being blocked.

6. The automatic sampling system for powders according to claim 1, characterized in that: The quantitative reduction device (4) is fixed on the waste pipe (7) and also includes a reduction port (41), a reduction piston (42), a reduction air hole (43), and a reduction cylinder (44); the reduction port (41) is placed inside the waste pipe (7).

7. The automatic sampling system for powders according to claim 1, characterized in that: The shrinking cylinder (44) can drive the shrinking piston (42) to extend or retract. When it extends, it can intercept the material flow in the waste pipe (7). When it retracts, the material sample can be discharged by its own gravity.

8. The automatic sampling system for powders according to claim 1, characterized in that: The dual-station sample collector (5) also includes an inlet (51), a moving cart (52), an outlet I (53), an outlet II (54), a sample bag (55), a rodless cylinder (56), a sample bag clamp (57), a magnetic block (58), a frame (59), a pulley (510), and a weight sensor (511). The rodless cylinder (56) is fixed to the frame (59). The moving cart (52) is connected to the slider on the rodless cylinder (56) and placed inside the frame (59). The sample bag clamp (57) is equipped with a magnetic block (58), which can fix the sample bag (55) in place by magnetic force.

9. The automatic sampling system for powders according to claim 8, characterized in that: The rodless cylinder (56) can drive the moving cart (52) to move left and right inside the frame (59). The bottom of the moving cart (52) is equipped with pulleys (510) to make it move smoothly. When the moving cart (52) is driven to the left limit, the discharge port I (53) coincides with the inlet port (51), and the corresponding sample bag (55) is in the receiving state. When the moving cart (52) is driven to the right limit, the discharge port II (54) coincides with the inlet port (51), and the corresponding sample bag (55) is in the receiving state.

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