Full-automatic intelligent sampling machine

Abstract

The utility model relates to the technical field of full-automatic sample preparation of coal and mineral products thereof in coal mines, power plants and ports, in particular to a full-automatic intelligent sample preparation machine. Comprising an incoming coal conveying unit A, a primary crushing unit B, a sample packaging and sending unit C, a sample preparation unit D, a quantitative division unit E, a secondary crushing unit F, a sample storage unit G, a sample drying unit H, a robot transfer unit I and an intelligent control unit J. Various devices for preparing coal samples are integrated, and the coal samples are prepared through a feasible technical route and a stable technological process. The coal sample preparation process is full-automatic and intelligent, so that the interference of human factors is greatly reduced, and the prepared coal sample can more accurately reflect the real components and value of a large batch of coal.

Description

Technical Field

[0001] This invention relates to the field of fully automated sample preparation technology for coal and its minerals in coal mines, power plants, and ports, specifically to a fully automated intelligent sample preparation machine. Background Technology

[0002] The quality of coal from coal mines, power plants, and ports determines its value and uses; this is especially important for the analysis of large quantities of coal samples. Manual sample preparation often involves many uncertainties and requires a high level of technical skill from operators. The randomness of sample preparation is crucial. From collected coal samples to final sample preparation, a series of processes are required, including primary crushing, reduction, pre-drying, secondary crushing, reduction, drying, equalization, and grinding. The stability of the sample preparation process is therefore essential.

[0003] Currently, coal samples are mainly prepared into three categories according to national standards: total moisture samples, reference samples, and analytical samples. These three types of samples differ in particle size, moisture content, and the required quantities also vary. For example, a total moisture sample with a particle size of 13mm requires at least 1.25 kg, a reference sample with a particle size of 3mm requires at least 0.7 kg, and an analytical sample with a particle size of 0.2mm requires at least 60 g. After the different coal samples are prepared, to ensure sample reliability, a dedicated coal sample collection device must be used to collect and preserve them for subsequent analysis.

[0004] Due to a series of factors, including the operator's skill level and the instability of the sampling equipment, the small amount of coal sample produced cannot fully represent the true state and value of a large quantity of coal. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a fully automated intelligent sample preparation machine that integrates various coal sample preparation devices. The machine is divided into a coal conveying unit A (including a sample separation module A1 and a coal collection module A2), a primary crushing unit B, a sample packaging and delivery unit C, a sample preparation unit D, a quantitative reduction unit E, a secondary crushing unit F, a sample storage unit G, a sample drying unit H (including a pre-drying module and an analytical sample drying module), a robot transfer unit I, and an intelligent control unit J. Through a practical technical approach and a stable process flow, the coal sample preparation process is fully automated and intelligent, significantly reducing human interference and enabling the prepared coal samples to more accurately reflect the true composition and value of large quantities of coal.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic intelligent sample preparation machine, comprising: a coal conveying unit A, a primary crushing unit B, a sample packaging and sending unit C, a sample preparation unit D, a quantitative reduction unit E, a secondary crushing unit F, a sample storage unit G, a sample drying unit H, a robot transfer unit I, and an intelligent control unit J, wherein the coal conveying unit A, the primary crushing unit B, the sample packaging and sending unit C, the sample preparation unit D, the quantitative reduction unit E, the secondary crushing unit F, the sample storage unit G, and the sample drying unit H are sequentially distributed around the robot transfer unit I;

[0009] The robotic transfer unit I is used to transfer coal samples from one workflow to the next workflow;

[0010] Coal conveying unit A: includes sample dividing module A1 and coal collection module A2; the coal collection module A2 conveys the coal sample, weighs and records the weight; the sample dividing module A1 divides the coal sample conveyed from sample drying unit H into two equal parts.

[0011] Primary crushing unit B: Used to crush the 13mm coal sample transferred from coal conveying unit A to 6mm through robot transfer unit I, and then weigh it;

[0012] The sample packaging and delivery unit C delivers, automatically packages, and identifies the coal sample bottle sent by the robot transfer unit I.

[0013] The sample preparation unit D is used to process the dried 3mm coal sample into a 0.2mm analytical coal sample through the grinding module. The robot continuously sends the two coal samples prepared by the sample splitting module A1 in the coal conveying unit A to the sample preparation unit D. The robot grinds the two coal samples in sequence to prepare two 0.2mm coal samples. After being bottled, the robot takes them out, weighs them, and sends them to the sample delivery unit.

[0014] Quantitative reduction unit E: includes a vibrating feeding module and a quantitative reduction module; the vibrating feeding module is used for feeding and weighing, and the quantitative reduction module is used for separating coal samples and waste materials, and transferring the waste materials to the sample storage unit G;

[0015] Secondary crushing unit F: The secondary crushing unit F includes a belt conveyor and a crusher;

[0016] Sample storage unit G includes a waste coal sample collection unit for the quantitative reduction unit and sample preparation unit D; it is equipped with a secondary sampling station and a waste sample collection station. The waste coal sample from each sample preparation is stored in a storage tank. When a new sample needs to be prepared, the storage tank rotates to the secondary sampling station, and the previous waste sample is taken out all at once. The cleaning mechanism thoroughly cleans the storage tank and weighs the newly taken-out sample. If secondary sampling is not required, the storage tank rotates to the waste sample collection station, and the coal sample inside the storage tank is released. At the same time, the storage tank is cleaned. The robot weighs the coal sample transferred from the quantitative reduction unit and the sample preparation unit and pours it into the storage tank of the sample storage unit. Then, the cleaning mechanism cleans the coal sample bucket to prevent coal sample residue and ensure that the loss rate meets the requirements.

[0017] Sample drying unit H: includes a pre-drying module and an analytical sample drying module;

[0018] The intelligent control unit J includes a host computer and a programmable logic controller (PLC). The sample preparation process is uniformly controlled by the host computer and the PLC. A robot is used to transfer coal samples between units and complete the processes required by the process, such as feeding, automatic weighing, iron removal, crushing, reducing, grinding, drying, sample collection, dust removal, cleaning, automatic coal sample packaging, and waste sample recycling. The system operates stably and reliably. The host computer has management permissions set to separate operation, maintenance and management.

[0019] Preferably, the sample dividing module A1 includes a coal receiving control unit cabinet, a vibrating feeder, a connecting hose, a dividing device, a dividing coal drop pipe, and a coal sample bottle, and the coal receiving collection module A2 includes a coal conveyor belt and a coal sample bucket.

[0020] Preferably, the primary crushing unit B includes a primary crushing unit cabinet, a belt conveyor, a first coal chute, a crusher, a second coal chute, and a coal sample bucket.

[0021] Preferably, the sample packaging and sending unit C includes a sample delivery unit cabinet, a coal sample bottle sending tube, a bottle cap storage device, a bottle cap gripping and capping mechanism.

[0022] Preferably, the sample preparation unit D includes a sample preparation unit cabinet, a vibrating feeder hopper, an electromagnetic vibrator, a grinding and powdering module, a steel wire hose I, a grinding and powdering module, a polarization motor assembly, a steel wire hose II, a separator, and a coal sample bottle.

[0023] Preferably, the quantitative reduction unit E includes a vibrating feeder storage hopper, a vibrating feeder uniform feeding device, a flexible connection one, a vibrating trough, an electromagnetic vibrator, a flexible connection two, a weighing module, a reduction ratio adjustment motor, a reduction rotary motor, a waste coal drop pipe vibrator, a reduction coal drop pipe vibrator, a reduction coal drop pipe, a waste coal drop pipe, a reduction coal sample bucket, a waste coal sample bucket, a coal sample bucket vibrator, and a quantitative reduction unit cabinet.

[0024] Preferably, the secondary crushing unit F further includes a secondary crushing unit cabinet, a first coal chute, a second coal chute, and a coal sample bucket.

[0025] Preferably, the sample storage unit G includes a coal sample barrel cleaning motor, a coal storage tank cleaning mechanism one, a coal storage tank cleaning mechanism two, a storage tank, a coal storage tank bottom sealing mechanism, a coal storage tank bottom opening mechanism, a coal sample drop pipe, a waste coal sample drop pipe, a waste coal collection bucket, a coal sample collection bucket, a weighing mechanism one, a weighing mechanism two, a sample storage unit, a rotary motor, and a coal sample inlet.

[0026] Preferably, the pre-drying module includes a coal sample drying unit cabinet, a heating fan, a fan duct, a coal sample inlet, a coal sample drying trough, a heating module, a coal sample stirring device, and a chain drive device. The analytical sample drying module includes a heating fan, a coal sample inlet, a fan duct, a coal sample drying trough, a heating module, a coal sample stirring device, and a chain drive device.

[0027] (III) Beneficial Effects

[0028] Compared with the prior art, the present invention provides a fully automatic intelligent sample preparation machine, which has the following beneficial effects:

[0029] This fully automated intelligent sample preparation machine integrates various coal sample preparation devices, divided into a coal conveying unit A (including a sample separation module A1 and a coal collection module A2), a primary crushing unit B, a sample packaging and sending unit C, a sample preparation unit D, a quantitative reduction unit E, a secondary crushing unit F, a sample storage unit G, a sample drying unit H (including a pre-drying module and an analytical sample drying module), a robot transfer unit I, and an intelligent control unit J. Through a practical technical approach and a stable process flow, the coal sample preparation process is fully automated and intelligent, greatly reducing the interference of human factors, and enabling the prepared coal samples to more accurately reflect the true composition and value of large quantities of coal. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structural layout of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the coal conveying unit A of the present invention;

[0032] Figure 3This is a schematic diagram of the structure of the primary crushing unit B of the present invention;

[0033] Figure 4 This is a schematic diagram of the sample packaging and sending unit C of the present invention;

[0034] Figure 5 This is a schematic diagram of the sample preparation unit D of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the quantitative reduction unit E of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the secondary crushing unit F of the present invention;

[0037] Figure 8 This is a schematic diagram of the sample storage unit G of the present invention;

[0038] Figure 9 This is a schematic diagram of the sample drying unit H of the present invention;

[0039] Figure 10 This is a schematic diagram of the operation process of the present invention.

[0040] The attached diagram is labeled as follows: A11, Coal supply control unit cabinet; A12, Vibrating feeder; A13, Connecting hose; A14, Divider; A15, Divider coal drop pipe; A16, Coal sample bottle; A21, Coal conveyor belt; A22, Coal sample bucket. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0042] Please see Figure 1-10 A fully automatic intelligent sample preparation machine includes: a coal conveying unit A, a primary crushing unit B, a sample packaging and sending unit C, a sample preparation unit D, a quantitative reduction unit E, a secondary crushing unit F, a sample storage unit G, a sample drying unit H, a robot transfer unit I, and an intelligent control unit J. The coal conveying unit A, primary crushing unit B, sample packaging and sending unit C, sample preparation unit D, quantitative reduction unit E, secondary crushing unit F, sample storage unit G, and sample drying unit H are distributed sequentially around the robot transfer unit I.

[0043] The robotic transfer unit I is used to transfer coal samples from one workflow to the next workflow;

[0044] Coal conveying unit A: includes sample dividing module A1 and coal collection module A2; the coal collection module A2 conveys the coal sample, weighs and records the weight; the sample dividing module A1 divides the coal sample conveyed from sample drying unit H into two equal parts.

[0045] The sample dividing module A1 includes a coal receiving control unit cabinet A11, a vibrating feeder A12, a connecting hose A13, a divider A14, a dividing coal drop pipe A15, and a coal sample bottle A16. The coal receiving collection module A2 includes a coal conveyor belt A21 and a coal sample bucket A22.

[0046] Specifically, the coal collection module transports coal samples via a conveyor belt to a sample bin inside the coal control unit. Each sample holds no more than 15 kg of coal with a particle size no larger than 13 mm. The sample bin is then placed on a weighing module to weigh and record the weight. A robot then transfers the sample bin to the next process step.

[0047] The separator module evenly divides the coal sample from the sample drying unit into two portions. A vibrating feeder evenly transfers the coal sample from the previous process into the separator, which consists of eight compartments with opposite outlets for adjacent compartments. The compartments are made of stainless steel with a mirror-polished inner surface. A reciprocating motor drives the entire set of compartments to move back and forth along their arrangement direction, ensuring that the coal sample is evenly divided into two portions without distinction. The compartment width is 18mm, suitable for reducing coal particles with a diameter of 6mm or less. After reduction, the coal sample enters two coal sample collection bins, where a robot removes and weighs it before sending it to the next process step.

[0048] Primary crushing unit B: Used to crush the 13mm coal sample transferred from coal conveying unit A to 6mm through robot transfer unit I, and then weigh it;

[0049] Specifically, the primary crushing unit B includes a primary crushing unit cabinet B1, a belt conveyor B2, a first coal chute B3, a crusher B4, a second coal chute B5, and a coal sample bucket B6. Furthermore, the crusher B4 can be a two-stage crusher.

[0050] Specifically, the robot transfers the coal sample from the coal receiving control unit to the primary crushing unit, which mainly crushes the 13mm coal sample into 6mm pieces. The robot arm slowly pours the 13mm coal sample into the feed hopper of the conveyor belt, which then transports the sample evenly through a stainless steel coal drop pipe to the crusher feed inlet. After being crushed by a double-stage ring hammer crusher, the sample enters the coal sample collection bucket. The weighing module weighs the sample bucket, and then the robot transfers it to the next process step.

[0051] Main performance characteristics of the belt conveyor: Adjustable belt speed; vibrator installed on the side wall of the feed hopper to reduce coal sample residue; scraper installed on the coal conveyor belt to scrape spilled coal to the conveyor outlet, reducing the probability of sample mixing; high-strength magnet installed above the coal conveyor belt to remove iron impurities mixed in the coal sample; equipped with a coal slurry plate to shape the coal sample conveyed on the belt, making the coal conveying speed more uniform; a blowing device installed at the conveyor outlet to remove residual coal sample on the belt; sealed belt conveyor roller mounting holes to prevent coal dust leakage; equipped with a belt breakage detection device with alarm output.

[0052] Key performance characteristics of the double-stage crusher: The crusher shell has an internal cavity purging function to prevent coal from sticking and remaining inside the crusher cavity, reducing cross-contamination; it has a stall detection function; there is no coal accumulation, blockage, or sticking in the crusher, and the vibration of the crusher is within the normal range.

[0053] The sample packaging and delivery unit C delivers, automatically packages, and identifies the coal sample bottle sent by the robot transfer unit I.

[0054] Specifically, the sample packaging and sending unit C includes a sample delivery unit cabinet C1, a coal sample bottle sending tube C2, a bottle cap storage device C3, and a bottle cap gripping and capping mechanism C4.

[0055] Specifically, according to the process flow, the prepared coal sample bottles are delivered to the sample delivery unit by a robot. The sample delivery unit then transports the samples to the sending module via a belt conveyor. After automatic sealing and labeling by the sending module, the samples are sent to the storage sample cabinet or other designated destinations. Operators in the sample delivery unit need to replenish the sample bottle caps periodically and promptly according to system prompts.

[0056] Specifically, the sample preparation unit D includes a sample preparation unit cabinet D1, a vibrating feeder hopper D2, an electromagnetic vibrator D3, a grinding and powdering module D4, a steel wire hose I D5, a grinding and powdering module D6, a polarization motor assembly D7, a steel wire hose II D8, a separator D9, and a coal sample bottle D10.

[0057] The sample preparation unit D's main function is to process the dried 3mm coal sample into a 0.2mm analytical coal sample through the grinding module. The robot continuously sends the two coal samples prepared by the sample splitting module A1 in the coal conveying unit A to the sample preparation unit D. The robot grinds the two coal samples in sequence to prepare two 0.2mm coal samples. After being bottled, the robot takes them out, weighs them, and sends them to the sample delivery unit.

[0058] Specifically, the main function of the sample preparation unit is to process dried 3mm coal samples into 0.2mm analytical coal samples using a grinding module. This unit mainly consists of a vibrating feeder module, a grinding and pulverizing module, and a separator module. The robot continuously delivers two identical coal samples (approximately 200g each) prepared by the separator module in the coal receiving control unit to the sample preparation unit. The samples are poured into the vibrating feeder, which evenly feeds each coal sample into the grinding module. The vibration mode of the vibrating feeder is adjustable to ensure optimal feeding conditions. The coal samples are conveyed through the vibrating feeder and then through a flexible steel hose into the grinding module. After processing by the grinding module, the coal samples pass through the flexible steel hose into the separator module, where they are evenly divided into two portions. The first 3mm dried coal sample, delivered by the robot arm, is ground and pulverized before being sent to the sample storage module. This pulverization process is primarily used to clean the sample preparation unit system of any residual samples from the previous preparation, preventing mixing and ensuring the purity of the current sample. At this point, the robot continues to grind and prepare the second 200g 3mm coal sample according to the previous process, finally making two 0.2mm coal samples, which are then placed into coal sample bottles, weighed by the robot, and sent to the sample delivery unit.

[0059] Vibrating feeder performance: Material of the structure in contact with the coal sample: stainless steel, with mirror polishing on the coal sample contact surface; equipped with compressed air cleaning holes to remove surface residue.

[0060] Vibrator vibration frequency: adjustable

[0061] Grinding module: The interior of the grinding module is wear-resistant, high-temperature resistant and not easily corroded. The parts of the module that come into contact with the coal sample do not accumulate, adhere, or leak, and do not affect the composition of the sample.

[0062] The grinding module is directly connected to the polarization motor, ensuring high-efficiency grinding. The grinding module and the sample preparation unit are isolated with shock absorption and buffering to reduce vibration and noise in the sample preparation unit, extending the service life of the entire machine and vibrating equipment, and facilitating maintenance.

[0063] The splitter module is the same as the coal supply control unit.

[0064] Quantitative reduction unit E: consists of a vibrating feeding module and a quantitative reduction module; the vibrating feeding module is used for feeding and weighing, and the quantitative reduction module is used for separating coal samples and waste materials, and transferring the waste materials to the sample storage unit G;

[0065] Specifically, the quantitative reduction unit E includes a vibrating feeder storage hopper E1, a vibrating feeder uniform feeding device E2, a flexible connection one E3, a vibrating trough E4, an electromagnetic vibrator E5, a flexible connection two E6, a weighing module E7, a reduction ratio adjustment motor E8, a reduction rotary motor E9, a waste coal drop pipe vibrator E10, a reduction coal drop pipe vibrator E11, a reduction coal drop pipe E12, a waste coal drop pipe E13, a reduction coal sample bucket E14, a waste coal sample bucket E15, a coal sample bucket vibrator E16, and a quantitative reduction unit cabinet E17.

[0066] Specifically, the robot delivers the coal sample bucket to the vibrating feeder's storage hopper. The vibrating feeder is equipped with a weighing module to weigh and calculate the weight of the poured coal sample. After the sample is dispensed, the weighing module outputs a control signal. The storage hopper can hold the coal sample from the bucket in one go. It has a uniform dispensing device that allows the coal sample to slowly enter the vibrating trough and fall slowly into the distributor's inlet during the high-frequency vibration of the vibrator. After passing through the distributor, the coal sample enters a coal sample collection (bottle) bucket and a waste coal sample collection bucket. The bottom of the coal sample collection (bottle) bucket has a vibrating leveling device to prevent the coal sample from overflowing during dispensing. After the waste sample collection bucket is filled, it is weighed and then transported by the robot to the sample storage unit. After the coal sample collection (bottle) bucket is filled, it is transported by the robot to the weighing station, where it is weighed and then sent to the next process flow.

[0067] Main performance characteristics of the vibrating feeder: The storage hopper is equipped with a vibrator and a shock absorption device; the vibrating discharge chute below the storage hopper is also equipped with a vibrator with an adjustable vibration frequency; it can accurately determine whether all coal samples have entered the separator, avoiding coal sample residue and loss.

[0068] The storage hopper and the vibrating trough, and the vibrating trough discharge port and the divider inlet are connected by PU flexible connection, with a smooth and flat surface to reduce coal sample residue.

[0069] Main performance characteristics of the divider:

[0070] The sample divider divides the sample into two or more pre-reserved portions according to the standard-specified reduction ratio. The mechanical divider meets the precision and equipment requirements of GB / T 19494.2-2004 "Mechanized Sampling of Coal - Part 2: Preparation of Coal Samples" and GB / T474-2008 "Methods for Preparing Coal Samples".

[0071] The coal reduction unit employs a standard rotary ballistic reducer to minimize coal sample volume shrinkage and increase the number of cuts. Rotary reduction results in a wider coal flow and less volume shrinkage during rectification, which facilitates successful reduction.

[0072] The reduction unit employs national standard methods to reduce coal sample volume shrinkage and increase the number of cuts. This enhances its adaptability to wet, sticky coals. Uniform, full-section cutting ensures no particle segregation and high reduction precision.

[0073] The divider is completely sealed internally to prevent dust from escaping during the dividing process and reduce errors. The dividing ratio is adjustable according to process requirements and is precisely controlled by a stepper motor. An observation port is provided on the dividing feed tube for easy inspection and maintenance.

[0074] Secondary crushing unit F: The secondary crushing unit F includes belt conveyor F2 and crusher F4;

[0075] Specifically, the secondary crushing unit F also includes a secondary crushing unit cabinet F1, a first coal chute F3, a second coal chute F5, and a coal sample bucket F6.

[0076] Specifically, the robot transports a coal sample bucket (≤6mm) to the feed hopper of the belt conveyor, slowly pouring the coal sample into the hopper. The feed hopper is equipped with a vibrator to prevent coal residue. The belt conveyor then evenly transports the coal sample to the crusher inlet. The belt conveyor outlet and the crusher inlet are connected by a stainless steel coal drop pipe, which is also equipped with a vibrator to prevent coal residue. After being processed by the crusher, the coal sample is smaller than 3mm. After being weighed by the weighing module, it is then transported by the robot to the next process step.

[0077] Main performance characteristics of the belt conveyor: Adjustable belt speed; vibrator installed on the side wall of the feed hopper to reduce coal sample residue; scraper installed on the coal conveyor belt to scrape spilled coal to the conveyor outlet, reducing the probability of sample mixing; high-strength magnet installed above the coal conveyor belt to remove iron impurities mixed in the coal sample; equipped with a coal slurry plate to shape the coal sample conveyed on the belt, making the coal conveying speed more uniform; a blowing device installed at the conveyor outlet to remove residual coal sample on the belt; sealed belt conveyor roller mounting holes to prevent coal dust leakage; equipped with a belt breakage detection device with alarm output.

[0078] Main performance characteristics of the crusher: The crusher is a single-stage crusher with a feed particle size of ≤6mm. It adopts a ring hammer crusher and is equipped with a 3mm screen filter at the discharge port to ensure that the output particle size does not exceed 3mm. The crusher shell has an internal cavity purging function to prevent coal adhesion and residue from the crusher cavity and reduce cross-contamination; it has a stall detection function; there is no coal accumulation, blockage, or coal adhesion in the crusher, and the vibration of the crusher does not exceed the standard.

[0079] Specifically, the sample storage unit G includes a coal sample barrel cleaning motor G1, a coal storage tank cleaning mechanism one G2, a coal storage tank cleaning mechanism two G3, a storage tank G4, a coal storage tank bottom sealing mechanism G5, a coal storage tank bottom opening mechanism G6, a coal sample drop pipe G7, a waste coal sample drop pipe G8, a waste coal collection bucket G9, a coal sample collection bucket G10, a weighing mechanism one G11, a weighing mechanism two G12, a sample storage unit G13, a rotary motor G14, and a coal sample inlet G15.

[0080] Sample storage unit G: Includes waste coal samples collected from the quantitative reduction unit and sample preparation unit D; it consists of 6 independent storage tanks evenly distributed on a turntable, driven by a motor reducer and controlled by a precise position switch. The tanks are made of stainless steel, with a cylindrical structure, placed vertically, and fed from the top and discharged from the bottom; it includes a secondary sampling station and a waste sample collection station. The waste coal samples from each sample preparation are stored in one storage tank; when re-sampling is required, the storage tank rotates to the secondary sampling station, removes the previous waste sample at once, and a cleaning mechanism thoroughly cleans the storage tank, weighing the newly removed sample; if secondary sampling is not required, the storage tank rotates to the waste sample collection station, releases the coal sample from the storage tank, and simultaneously cleans the storage tank; the robot weighs the coal samples transferred from the quantitative reduction unit and sample preparation unit and pours them into the sample storage unit storage tank, then the cleaning mechanism cleans the coal sample bucket to prevent coal sample residue and ensure that the loss rate meets the requirements;

[0081] Sample drying unit H: includes a pre-drying module and an analytical sample drying module; specifically, the pre-drying module includes a coal sample drying unit cabinet H1, a heating fan H2, a fan duct H3, a coal sample inlet H4, a coal sample drying trough H5, a heating module H6, a coal sample stirring device H7, and a chain drive device H8; the analytical sample drying module includes a heating fan H9, a coal sample inlet H10, a fan duct H11, a coal sample drying trough H12, a heating module H13, a coal sample stirring device H14, and a chain drive device H15.

[0082] Specifically, the two drying modules are located in relatively independent and sealed spaces, so they do not affect each other. The inner surface of the drying unit's outer shell is covered with heat-insulating material, which saves energy and keeps the unit warm.

[0083] The pre-drying module's main performance characteristics include: it consists of multiple independently controlled coal sample drying troughs. The troughs are made of stainless steel, with mirror-polished surfaces on the parts in contact with the coal sample. A heating module is installed at the bottom of each trough to heat the bottom. Each trough is equipped with an independent coal sample stirring device, capable of tumbling and reciprocating the stirring of the coal sample. The stirring device is chain-driven, ensuring stable operation and a low failure rate, which facilitates the evaporation of moisture from the coal sample. A high-power heating fan and temperature sensor are installed in the sealed space of the drying module to rapidly heat the ambient air to the set temperature. Pipes are installed in the sealed space to exchange air with the outside, allowing the moisture evaporated during the drying process to be quickly discharged. Once the coal sample in the trough reaches the predetermined drying effect, the trough is flipped under the precise drive of an electric pusher, pouring the coal sample from the trough into a coal sample bucket. A robot then transports the coal sample bucket to the weighing station for weighing, after which the sample proceeds to the next process step.

[0084] The main performance characteristics of the sample drying module are as follows: It consists of multiple independently controlled coal sample drying tanks. The tanks are made of stainless steel, with mirror-polished surfaces on the parts in contact with the coal sample. A heating module is installed at the bottom of each tank to heat the bottom. Each tank is equipped with an independent coal sample stirring device, which tumbles and stirs the coal sample. The stirring device is chain-driven, ensuring stable operation and a low failure rate, and facilitating the evaporation of moisture from the coal sample. A high-power heating fan and temperature sensor are installed in the sealed space of the drying module to quickly heat the ambient air to the set temperature. Pipes are installed in the sealed space to exchange air with the outside, allowing the moisture evaporated during the drying process to be quickly discharged. Once the coal sample in the tank reaches the predetermined drying effect, the tank is flipped under the precise drive of an electric pusher, pouring the coal sample from the tank into a coal sample container. A robot then transports the coal sample container to the weighing station for weighing, after which the sample proceeds to the next process step.

[0085] The intelligent control unit J includes a host computer and a programmable logic controller (PLC). The sample preparation process is uniformly controlled by the host computer and the PLC. A robot is used to transfer coal samples between units and complete the processes required by the process, such as feeding, automatic weighing, iron removal, crushing, reducing, grinding, drying, sample collection, dust removal, cleaning, automatic coal sample packaging, and waste sample recycling. The system operates stably and reliably. The host computer has management permissions set to separate operation, maintenance and management. The intelligent control unit J can be set into two groups, namely intelligent control unit J1 and intelligent control unit J2.

[0086] The system can automatically adjust the reduction ratio based on the incoming material weight to achieve fixed-mass reduction. The prepared coal samples can be weighed and labeled. The coal samples are bottled, and each bottle is labeled with an RFID chip, ensuring that the label is unique and can be correctly read during the transfer process. The prepared coal samples are transported from the sample delivery unit to the fully automated sample storage and retrieval room via a point-to-point transfer device. The entire process is fully automated, fully enclosed, and requires no human intervention.

[0087] The fully automated sample preparation machine features a manual coal sample inlet. This inlet can process 20-100 kg of coal samples at a time. It can handle coal samples with a nominal maximum particle size of 50 mm. Access control is set at the inlet to prevent human interference. Before preparing coded offline samples, the machine can scan the incoming sample information using a handheld scanner and has a sample sorting function. Before preparing uncoded offline samples, the machine allows manual input of coal information and requests a code from the intelligent centralized coal combustion management system, and can also receive the code returned by the system.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fully automatic intelligent sample preparation machine, characterized in that: It comprises: a coal sample delivery unit A, a primary crushing unit B, a sample packaging and delivery unit C, a sample preparation unit D, a quantitative sample splitting unit E, a secondary crushing unit F, a sample storage unit G, a sample drying unit H, a robot transfer unit I, and an intelligent control unit J, wherein the coal sample delivery unit A, the primary crushing unit B, the sample packaging and delivery unit C, the sample preparation unit D, the quantitative sample splitting unit E, the secondary crushing unit F, and the sample drying unit H are sequentially arranged around the robot transfer unit I; the robot transfer unit I is used for transferring coal samples from one work process to the next work process; the coal sample delivery unit A comprises a sample splitting module A1 and a coal sample collection module A2; the coal sample collection module A2 is used for delivering coal samples and weighing and recording the coal samples; the sample splitting module A1 is used for uniformly splitting the coal samples delivered by the sample drying unit H into two parts; the primary crushing unit B is used for crushing the 13 mm coal samples delivered by the robot transfer unit I from the coal sample delivery unit A into 6 mm, and then weighing the 6 mm coal samples; the sample packaging and delivery unit C is used for delivering, automatically packaging, and identifying the coal sample bottles delivered by the robot transfer unit I; the sample preparation unit D is used for grinding the dried 3 mm coal samples into 0.2 mm analysis coal samples; the robot continuously delivers the two parts of coal samples prepared by the sample splitting module A1 of the coal sample delivery unit A to the sample preparation unit D; the robot grinds the two parts of coal samples to prepare two parts of 0.2 mm coal samples, respectively; after the two parts of 0.2 mm coal samples are packaged into bottles, the robot takes out the two parts of 0.2 mm coal samples, weighs the two parts of 0.2 mm coal samples, and then delivers the two parts of 0.2 mm coal samples to the sample delivery unit; the quantitative sample splitting unit E comprises a vibrating feeding module and a quantitative sample splitting module; the vibrating feeding module is used for feeding and weighing; and the quantitative sample splitting module is used for splitting coal samples and waste samples, and delivering the waste samples to the sample storage unit G; the secondary crushing unit F comprises a belt conveyor (F2) and a crusher (F4); the sample storage unit G comprises collected waste coal samples of the quantitative sample splitting unit and the sample preparation unit D; a secondary sampling station and a waste sample collection station are arranged; the waste coal sample prepared in each sample preparation process is stored in a storage tank; when re-preparation is needed, the storage tank is rotated to the secondary sampling station, the waste sample in the storage tank is taken out at one time, a sweeping mechanism sweeps the storage tank, and the re-prepared sample is weighed; if secondary sampling is not needed, the storage tank is rotated to the waste sample collection station, the coal sample in the storage tank is discharged, and the storage tank is swept; the robot weighs the coal samples delivered by the quantitative sample splitting unit and the sample preparation unit, and then pours the coal samples into the storage tank of the sample storage unit; then, the sweeping mechanism sweeps the coal sample tank to prevent the coal sample from remaining and to ensure that the loss rate meets the requirements; the sample drying unit H comprises a pre-drying module and an analysis sample drying module. Intelligent control unit J: including host computer and programmable controller (PLC); the sample preparation process is controlled by the host computer and programmable controller (PLC), the robot is used to realize the transfer of coal samples between units, the functions of feeding, automatic weighing, iron removal, crushing, size reduction, grinding, drying, sample collection, dust removal process, cleaning, automatic packaging of coal samples, and sample recycling are completed, the system runs stably and reliably, the host computer operation setting management authority is separated from operation, maintenance and management.

2. The fully automatic intelligent sample preparation machine according to claim 1, characterized in that: The sample division module A1 includes a coal collection control unit cabinet (A11), a vibrating feeder (A12), a connecting hose (A13), a divider (A14), a coal falling pipe (A15), and a coal sample bottle (A16).

3. The fully automatic intelligent sample preparation machine according to claim 2, characterized in that: The primary crushing unit B includes a primary crushing unit cabinet (B1), a belt conveyor (B2), a coal falling pipe one (B3), a crusher (B4), a coal falling pipe two (B5), and a coal sample bucket (B6).

4. The fully automatic intelligent sample preparation machine according to claim 3, characterized in that: The sample packaging and sending unit C includes a sample delivery unit cabinet (C1), a coal sample bottle sending pipe (C2), a bottle cap storage device (C3), a bottle cap grabbing and capping mechanism (C4).

5. The fully automatic intelligent sample preparation machine according to claim 4, characterized in that: The sample preparation unit D includes a sample preparation unit cabinet (D1), a vibrating feeder hopper (D2), an electromagnetic vibrator (D3), a grinding and powdering module (D4), a steel hose one (D5), a grinding and powdering module (D6), a polarization motor assembly (D7), a steel hose two (D8), a divider (D9), and a coal sample bottle (D10).

6. The fully automatic intelligent sample preparation machine according to claim 5, characterized in that: The quantitative size reduction unit E includes a vibrating feeder storage hopper (E1), a uniform material falling device of the vibrating feeder (E2), a soft connection one (E3), a vibrating chute (E4), an electromagnetic vibrator (E5), a soft connection two (E6), a weighing module (E7), a size reduction proportional adjustment motor (E8), a size reduction rotary motor (E9), a waste material coal falling pipe vibrator (E10), a size reduction coal falling pipe vibrator (E11), a size reduction coal falling pipe (E12), a waste material coal falling pipe (E13), a size reduction coal sample bucket (E14), a waste material coal sample bucket (E15), a coal sample bucket vibrator (E16), and a quantitative size reduction unit cabinet (E17).

7. The fully automatic intelligent sample preparation machine according to claim 6, characterized in that: The secondary crushing unit F further includes a secondary crushing unit cabinet (F1), a coal falling pipe one (F3), a coal falling pipe two (F5), and a coal sample bucket (F6).

8. The fully automatic intelligent sample preparation machine according to claim 7, characterized in that: The sample storage unit G includes a coal sample bucket cleaning motor (G1), a coal storage tank cleaning mechanism one (G2), a coal storage tank cleaning mechanism two (G3), a storage tank (G4), a coal storage tank bottom sealing mechanism (G5), a coal storage tank bottom opening mechanism (G6), a coal sample coal falling pipe (G7), a waste coal sample coal falling pipe (G8), a waste coal collection bucket (G9), a coal sample collection bucket (G10), a weighing mechanism one (G11), a weighing mechanism two (G12), a sample storage unit (G13), a rotary motor (G14), and a coal sample inlet (G15).

9. The fully automatic intelligent sample preparation machine according to claim 8, characterized in that: The pre-drying module comprises a coal sample drying unit cabinet (H1), a heating fan (H2), a fan duct (H3), a coal sample feeding port (H4), a coal sample drying chute (H5), a heating module (H6), a coal sample stirring device (H7), a chain driving device (H8), the analysis sample drying module comprises a heating fan (H9), a coal sample feeding port (H10), a fan duct (H11), a coal sample drying chute (H12), a heating module (H13), a coal sample stirring device (H14) and a chain driving device (H15).

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