Novel online deep sample preparation device

Abstract

A novel online deep sample preparation device comprises a primary sampling and crushing unit, a subsample division and collection unit and a total sample division unit, the primary sampling and crushing unit comprises an automatic belt sampling machine and a 6mm crusher, and the automatic belt sampling machine is used for collecting raw coal subsamples; the subsample division and sample collection unit comprises a waste material division belt, a scraping and sweeping division device and a bottom opening sample collector, the scraping and sweeping division device performs preliminary division on a coal sample of a 6mm crusher, and redundant samples are removed by the waste material division belt; the total sample division unit comprises a total sample division belt and a double-sample sampler, the double-sample sampler adopts a double-sample belt middle sampler, one sample is guided into a full-water analysis sample bottle, and the other sample is guided into a general analysis sample bottle. The pneumatic conveying system is simple in structure and free of frequent action components, so that the reliability of unattended operation in the whole process is fundamentally guaranteed.

Description

Technical Field

[0001] This invention relates to the field of sample preparation equipment, and in particular to a novel online deep sample preparation device. Background Technology

[0002] With technological advancements, the industry has recognized that to completely resolve the bottlenecks in transport systems, it is essential to reduce sample volume at the source. One key to reducing sample volume lies in decreasing sample particle size (according to sampling theory, the minimum retention mass of the same representative subsample decreases sharply with decreasing particle size). Therefore, reducing the particle size at the sampling end from 13mm to 6mm has become an important direction for technological evolution.

[0003] Chinese patent CN108106893A discloses an online coal sample preparation system. This patent is a typical example of enhancing the functionality at the sampling end based on the traditional model. Its core features are: setting up a reduction and waste material conveyor belt after the crusher (which can be 13mm or 6mm); on this conveyor belt, an analytical sample reducer and a total water sample reducer are arranged in parallel, each taking a portion of the coal sample from the conveyor belt and importing it into its respective sample collector; this achieves early, independent, and parallel collection of total water samples and analytical samples at the sampling point, avoiding the disadvantages of sharing coal samples.

[0004] However, this patent still has the following drawbacks: 1. It does not fully utilize the advantages of particle size to achieve system-level simplification: Even though its crusher uses 6mm crushing, and the amount of sample produced is reduced compared to 13mm, its system architecture is still traditional. It still needs to collect samples into a sample collector, and then it will likely still need a mechanical system to transport these samples away. It does not creatively adopt a completely new and more efficient sample transport method because it uses 6mm particle size.

[0005] 2. Failure to minimize sample volume: The goal was to separate two representative samples, but it did not optimize to the extreme to meet the minimum sample retention target. The amount of analytical sample retained may still be greater than the minimum amount required for subsequent sample preparation.

[0006] 3. Insufficient system architecture optimization: Its core technology is the arrangement of the divider, and the overall architecture is still a "heavy" architecture based on belt conveyor and mechanical collection, which fails to achieve the "lightweight" and "intensive" design of the sampling terminal equipment. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology, which cannot take advantage of 6mm particle size, resulting in rigid system architecture and low transfer efficiency, and to provide a new type of online deep sample preparation device.

[0008] The technical solution adopted by the present invention to solve its technical problem is a novel online deep sampling device, including a primary sampling and crushing unit, a subsample reduction and collection unit, and a total sample reduction unit. The primary sampling and crushing unit, the subsample reduction and collection unit, and the total sample reduction unit are connected in sequence. The primary sampling and crushing unit includes a belt automatic sampler and a 6mm crusher. The belt automatic sampler is used to collect raw coal subsamples, and the inlet of the 6mm crusher is located at the outlet of the belt automatic sampler. The subsample reduction and collection unit includes a waste material reduction belt, a scraper reducer, and a bottom-opening sample collector. The scraper reducer performs preliminary reduction of the coal sample from the 6mm crusher, and the waste material reduction belt removes excess sample. The outlet of the scraper reducer is connected to the inlet of the bottom-opening sample collector to perform subsample division and collection. The total sample reduction unit includes a total sample reduction belt and a dual sampler. The dual sampler uses a sampler in the middle of the dual sample belt to simultaneously but independently extract two fully representative samples from the same coal flow. One sample is introduced into a total water analysis bottle, and the other is introduced into a general analysis bottle.

[0009] Furthermore, it also includes an instant sealing unit, which includes a bottling machine that seals both whole water analysis sample bottles and general analysis sample bottles.

[0010] Furthermore, it also includes a pneumatic conveying unit, which includes a conveying pipe and a pneumatic drive device, and the outlet of the bottling machine is connected to the conveying pipe.

[0011] Furthermore, the general analytical sample vials are provided in two identical portions.

[0012] Furthermore, the automatic belt sampler includes a central sampler, a main coal conveyor belt, and a crushing and feeding belt. The outlet of the central sampler is located at one end of the main coal conveyor belt, one end of the main coal conveyor belt is connected to the crushing and feeding belt, and the outlet of the crushing and feeding belt is connected to the inlet of the 6mm crusher.

[0013] Furthermore, the outlet of the delivery pipeline is a central sample preparation room or a laboratory.

[0014] Furthermore, the target sample retention volume for the total water analysis sample bottle is 1.25 kg.

[0015] Furthermore, the target sample retention amount for the general analytical sample bottle is 3.75 kg.

[0016] Furthermore, the samples transported to the central sample preparation room or laboratory are general analytical sample bottles.

[0017] Furthermore, the whole water analysis sample bottles are transported to the central laboratory.

[0018] In summary, the present invention has the following beneficial technical effects: 1. At the sampling terminal, a 6mm crusher and its matching integrated reduction and collection unit replace the traditional heavy combination of a 13mm crusher and large sample combining / packaging equipment, achieving miniaturization, low cost, and low complexity of single-point equipment. Each sampling point is transformed from a "heavy production line" to a "light terminal," significantly reducing equipment costs, civil engineering costs, and operation and maintenance costs, thus achieving a decrease in total investment.

[0019] 2. Simultaneous preparation and immediate sealing of two samples (total moisture sample and general analytical sample) at the sampling terminal with a particle size of 6mm eliminates moisture loss and human interference from the process. This eliminates the biggest source of failure—the mechanical transport system. The pneumatic conveying system has a simple structure, no frequently moving parts, and an extremely low failure rate, fundamentally ensuring the reliability of the entire unattended process. Furthermore, the total moisture sample is immediately sealed at the sampling point and transported through a fully enclosed pipeline, completely isolating moisture loss during transport and waiting, resulting in high data accuracy and significant economic value.

[0020] 3. By adopting a pneumatic conveying system as the core transfer method, a static pipeline network layout of "multiple points (lightweight terminals) to one point (sample preparation center)" is constructed, which replaces the dynamic mechanical transfer network of "multiple points (heavy production lines) to multiple points (batch collection stations)", fundamentally improving the system's reliability and scalability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a novel online deep sample preparation device of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Central sampler; 2. Main coal conveyor belt; 3. Crushing and feeding belt; 4. 6mm crusher; 5. Waste material reducing belt; 6. Scraper reducing device; 7. Bottom-opening sampler; 8. Dual-sample sampler; 9. Total sample reducing belt; 10. General analysis sample bottle; 11. Total water analysis sample bottle; 12. Bottling machine; 13. Conveying pipeline. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Reference Figure 1 This embodiment includes a primary sampling and crushing unit, a subsample reduction and collection unit, a total sample reduction unit, an instant sealing unit, and a pneumatic conveying unit connected in sequence.

[0025] The primary sampling and crushing unit consists of an automatic belt sampler and a crusher. Both the automatic belt sampler and the crusher are standardized equipment. The automatic belt sampler is an automated device used for taking samples in belt conveyor scenarios. In this embodiment, it includes a central sampler 1, a main coal conveyor belt 2, and a crushing feed belt 3. The outlet of the central sampler 1 is located at the top of the main coal conveyor belt 2, and the crushing feed belt 3 is located below the main coal conveyor belt 2. One end of the main coal conveyor belt 2 transports the material and drops it onto the crushing feed belt 3, while the end of the crushing feed belt 3 in the transport direction is connected to the inlet of the crusher. The crusher used is a 6mm crusher 4. The equipment for achieving 6mm crushing is not limited to a hammer crusher, but can also be other forms of fine crushing equipment such as a double roll crusher or a jaw crusher, as long as it can achieve the requirement of output particle size ≤6mm.

[0026] By completely replacing the traditional 13mm crusher with a 6mm crusher, the sample can be crushed to a particle size of ≤6mm in one go. This not only reduces the sample particle size, but also lays a theoretical foundation for a significant reduction in the amount of sample in the future.

[0027] The subsample reduction and collection unit includes a waste material reduction belt 5, a scraper reducer 6, and a bottom-opening sampler 7. The waste material reduction belt 5 is located below the outlet of the 6mm crusher 4, and the scraper reducer 6 and the bottom-opening sampler 7 are arranged around the waste material reduction belt 5. The scraper reducer 6 performs preliminary reduction of the 6mm coal sample stream in the first instance, discarding most of the excess sample, while the bottom-opening sampler 7 performs subsample division and collection. The same total sample is formed from the same mining point, and different total samples are formed from different mining points.

[0028] Both the scraper reducer 6 and the bottom sampler 7 are standardized. When the subsample reduction and collection units perform sample division and collection, samples from different mining sites are concentrated in the same coal sample bucket. The number of reductions and the amount of retained samples meet the standard requirements. Alternatively, the standard requirements can be met by using a nominal particle size of 13mm.

[0029] The total sample reduction unit includes a total sample reduction belt 9 and a dual sampler 8. The total sample reduction belt 9 is located below the outlet of the bottom-opening sampler 7, while the dual sampler 8 is set on the total sample reduction belt 9. The total sample reduction belt 9 reduces the total sample, retaining a total water sample and a general analysis sample, and completes the transfer and transportation of most of the waste materials. The dual sampler 8 uses the sampler 1 in the middle of the dual sample belt to simultaneously but independently extract two fully representative samples from the same coal flow. One sample is introduced into the total water analysis sample bottle 11, with a target retention amount of approximately 1.25 kg, and the other sample is introduced into the general analysis sample bottle 10, with a target retention amount of approximately 3.75 kg. The samples can be packaged in two coal sample bottles.

[0030] General analysis sample vials (10) refer to sample vials used for storing and analyzing general analytical samples, such as coal samples. The mainstream material is glass, especially borosilicate glass. General analysis sample vials are not a single product, but rather a category. The same applies to total water analysis sample vials.

[0031] The instant sealing unit consists of a bottling machine 12, which performs rapid and automatic sealing of the two coal sample bottles collected, such as capping and screwing, to prevent moisture loss and external contamination. The most important function is to ensure the sealing of the total water analysis sample bottle 11. The coal sample bottles are usually small-capacity sample bottles, such as 2-5 liters.

[0032] The pneumatic conveying unit includes a conveying pipe 13 and a pneumatic drive device. The outlet of the bottling machine 12 connects to the conveying pipe 13, allowing the sealed coal sample bottles to be automatically or manually placed into the conveying pipe 13. The pneumatic drive device then uses negative pressure airflow to instantly transport the bottles at a speed of approximately 5 meters per second along the "highway" constructed by the sealed conveying pipe 13 to a central sample preparation room or laboratory hundreds of meters away. This completely eliminates all traditional mechanical transfer equipment and avoids human intervention. In another embodiment, in addition to pneumatic conveying, if the distance is very short, a small robot or a linear motor-driven shuttle can be used to transport the sample bottles within the sealed pipe. Although the cost may be higher, this also achieves automated sealed transfer and avoids human intervention.

[0033] Furthermore, only 3.75 kg of 6 mm general analytical sample is transported to the sample preparation room. The sample preparation only requires three steps: 3 mm sample preparation, drying, and grinding (to 0.2 mm). This significantly reduces the size, complexity, and space requirements of the equipment. Meanwhile, the total water analysis sample bottle 11 is transported to the laboratory for total water analysis.

[0034] The main workflow includes sampling, 6mm crushing, 6mm subsample reduction, sample collection, total sample reduction to whole water sample and analytical sample, immediate sealing, pneumatic pipeline transportation, and post-processing drying and grinding. By reducing particle size, "sample size" is achieved, which makes "pneumatic transportation" possible. Finally, "static pipeline network" replaces "dynamic transmission machinery", completing a complete reconstruction of the entire system architecture.

[0035] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A novel in-line depth sampling device, characterized in that, The primary sampling and crushing unit, the sub-sample splitting and collecting unit, and the total sample splitting unit are sequentially connected in order, the primary sampling and crushing unit comprises a belt automatic sampler and a 6mm crusher (4), the belt automatic sampler is used to collect the raw coal sub-sample, and the inlet of the 6mm crusher (4) is arranged at the outlet of the belt automatic sampler; The sub-sample splitting and collecting unit comprises a waste sample splitting belt (5), a scraping and splitting device (6), and a bottom-opening collector (7), the scraping and splitting device is used to preliminarily split the coal sample of the 6mm crusher (4), and the excess sample is removed by the waste sample splitting belt (5), the outlet of the scraping and splitting device (6) is connected to the inlet of the bottom-opening collector (7) to split and collect the sub-sample; The total sample splitting unit comprises a total sample splitting belt (9) and a duplicate sample sampler (8), the duplicate sample sampler (8) adopts a duplicate sample belt middle sampler (1) to simultaneously and independently intercept two completely representative samples from the same coal flow, one is introduced into a total water analysis sample bottle (11), and the other is introduced into a general analysis sample bottle (10).

2. A novel on-line depth sampling device according to claim 1, characterized in that, The instant sealing unit is further included, and the instant sealing unit comprises a bottling machine (12) which is used to seal the total water analysis sample bottle (11) and the general analysis sample bottle (10).

3. A novel on-line depth sampling device according to claim 2, characterized in that, The pneumatic conveying unit is further included, and the pneumatic conveying unit comprises a conveying pipeline (13) and a pneumatic driving device, and the outlet of the bottling machine (12) is connected to the conveying pipeline (13).

4. A novel on-line depth sampling device according to claim 1, characterized in that, The general analysis sample bottle (10) is provided with two same bottles.

5. A novel on-line depth sampling device as claimed in claim 1, wherein, The belt automatic sampler comprises a middle sampler (1), a main coal conveying belt (2), and a crushing and feeding belt (3), the outlet of the middle sampler (1) is arranged at one end of the main coal conveying belt (2), one end of the main coal conveying belt (2) is connected to the crushing and feeding belt (3), and the outlet of the crushing and feeding belt (3) is connected to the inlet of the 6mm crusher (4).

6. A novel on-line depth sampling device according to claim 3, characterized in that, The outlet of the conveying pipeline (13) is a central sample preparation room or a laboratory.

7. A novel on-line depth sampling device as claimed in claim 1, wherein, The target sample amount of the total water analysis sample bottle (11) is 1.25kg.

8. A novel on-line depth sampling device as claimed in claim 4, wherein, The target sample amount of the general analysis sample bottle (10) is 3.75kg.

9. A novel on-line depth sampling device as claimed in claim 6, wherein, The general analysis sample bottle (10) is conveyed to the central sample preparation room.

10. A novel on-line depth sampling device as claimed in claim 6, wherein, The total water analysis sample bottle (11) is conveyed to the central laboratory.

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