Uniform sampling and storing device for furnace coal

Abstract

The invention relates to the technical field of as-fired coal, and particularly discloses a uniform sampling and storing device for as-fired coal, comprising: a storage element comprising a coal sample storage hopper; the coal samples in the material storage element are conveyed into the packaging element to be packaged; wherein the coal sample storage hopper is longitudinally provided with a plurality of branch hoppers which sequentially form a grading stirring area, a splash-proof baffle is arranged at the top end of the longitudinal stirring area, the material storage element further comprises a vibrating motor, the vibrating motor is located on the circumferential side wall of the coal sample storage hopper, a spiral stirrer is arranged at a feeding port of the coal sample storage hopper, and the spiral stirrer is located on the top of the coal sample storage hopper. By arranging the grading stirring area in the coal sample storage hopper, the spiral stirrer, the scraping plate and other devices, it is ensured that coal samples are fully mixed at different stages. Therefore, the uniformity of the final sample is improved, and the representativeness of the final sample is also ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of coal for furnace, in particular to a device for uniformly sampling and preserving coal for furnace. Background Art

[0002] In the power industry, in order to ensure that the quality of coal for furnace meets the standard requirements, it is usually necessary to conduct detailed analysis and testing on the collected coal samples. Traditionally, the collection of coal samples mostly adopts the "sample collection bucket" method, that is, the coal samples collected from different batches or time points are mixed manually and collected in the sample collection bucket.

[0003] This method has several significant disadvantages: First, since the coal samples need to go through the manual mixing process, it not only increases the labor intensity of the staff, but also easily causes the loss of moisture in the coal samples, affecting the representativeness of the samples; Second, in the manual operation process, it is difficult to completely avoid human errors and potential fraud behaviors, which pose a threat to the accuracy and reliability of the coal sample analysis results. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the manual mixing of coal samples causes the loss of moisture in the coal samples due to sealing problems, affecting the representativeness of the samples.

[0005] The above technical problem is solved by the following technical solution: The present invention provides a device for uniformly sampling and preserving coal for furnace, which includes a storage element, including a coal sample storage hopper;

[0006] A packing element, and the coal samples in the storage element are transported to the packing element for packing;

[0007] Among them, a plurality of distribution hoppers are longitudinally arranged in the coal sample storage hopper to form a hierarchical stirring area in sequence, and a splash-proof baffle is arranged at the top of the longitudinal stirring area.

[0008] In a preferred embodiment of the device for uniformly sampling and preserving coal for furnace of the present invention: The storage element further includes a vibrating motor, the vibrating motor is located on the circumferential side wall of the coal sample storage hopper, and a spiral stirrer is arranged at the feed inlet of the coal sample storage hopper.

[0009] In a preferred embodiment of the device for uniformly sampling and preserving coal for furnace of the present invention: The storage element further includes a weighing sensor arranged between the hierarchical stirring areas, and the discharge port at the bottom of the coal sample storage hopper exports the raw materials through an inclined plane.

[0010] In a preferred embodiment of the device for uniformly sampling and preserving coal for furnace of the present invention: A driving motor is arranged at the top of the coal sample storage hopper, a scraper is installed on the side wall of the output shaft of the driving motor, and a plurality of the scrapers are respectively located inside the grading hoppers and are arranged in a staggered manner, and the driving motor drives the scrapers to rotate to mix the raw materials.

[0011] In a preferred embodiment of the furnace coal uniform sampling and storage device of the present invention: the discharge openings of the side walls of the grading hopper are staggered, and the scrapers are arranged in a triangular shape, and the inclined surfaces of the scrapers are in contact with the inner wall of the grading hopper.

[0012] In a preferred embodiment of the furnace coal uniform sampling and preservation device of the present invention: the splash shield includes an inclined plate arranged on the side wall of the drive motor output shaft, a toggle plate is installed on the top of the inclined plate, and the toggle plate is sleeved on the side wall of the output shaft for toggling the inclined plate.

[0013] In a preferred embodiment of the furnace coal uniform sampling and storage device of the present invention: the inclined plate is arranged in two areas, namely area B and area C, which are connected by a spring hinge, and area B is heavier than area C.

[0014] In a preferred embodiment of the furnace coal uniform sampling and preservation device of the present invention: the packaging element includes a reduction belt conveyor, wherein the reduction belt conveyor takes samples through the reducer and transports them to the last-stage coal conveyor belt conveyor, and the remaining coal sampled by the reduction belt conveyor is transported to the lower-level belt through the waste lifting link.

[0015] In a preferred embodiment of the furnace coal uniform sampling and storage device of the present invention: a lifting hopper is provided below the final-stage coal conveyor belt, and an automatic packaging device is provided below the lifting hopper.

[0016] In a preferred embodiment of the furnace coal uniform sampling and preservation device of the present invention: a finished product conveyor belt is provided at the lower level of the automatic packaging device, and the finished product conveyor belt is used to transport the coal samples to the sample receiving machine.

[0017] The beneficial effects of the present invention are as follows: by providing graded stirring areas in the coal sample storage hopper and the provision of spiral stirrers, scrapers and other devices, it is ensured that the coal samples are fully mixed at different stages. This not only improves the uniformity of the final sample, but also ensures its representativeness. In particular, the application of weighing sensors ensures the consistency and accuracy of coal sample distribution. The fully sealed design of the device effectively avoids the loss of moisture during the sampling process, which is crucial for maintaining the physical and chemical properties of the coal samples, thereby ensuring the authenticity of the samples and the reliability of the analysis results. Automated operation reduces the degree of participation in the manual mixing process, reduces errors and potential human interference caused by manual operation, and enhances the accuracy and reliability of the analysis results. The use of a PLC control system to achieve automatic control not only improves the efficiency of sampling, but also achieves the goal of "coal samples not falling to the ground", improves the quality of the samples, and effectively reduces the labor intensity of the staff. At the same time, the design of the splash shield protects the operator from the hazards of splashing materials and improves work safety. Brief Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0019] Figure 1 shows a schematic diagram of the overall process structure of the uniform sampling and preservation device for furnace coal;

[0020] Figure 2 shows a schematic diagram of the structure of the storage element of the uniform sampling and preservation device for furnace coal;

[0021] Figure 3 shows a schematic diagram of the internal structure of the coal sample storage hopper of the uniform sampling and preservation device for furnace coal;

[0022] Figure 4 shows a schematic diagram of the position structure of the grading hopper and the splash-proof baffle of the uniform sampling and preservation device for furnace coal;

[0023] Figure 5 shows a front view structure diagram of the grading hopper and the splash-proof baffle of the uniform sampling and preservation device for furnace coal.

[0024] Figure 6 shows a schematic diagram of the rectangular discharge port structure of the grading hopper of the uniform sampling and preservation device for furnace coal.

[0025] Figure 7 shows a schematic diagram of the circular discharge port structure of the grading hopper of the uniform sampling and preservation device for furnace coal.

[0026] Figure 8 shows a schematic diagram of the triangular discharge port structure of the grading hopper of the uniform sampling and preservation device for furnace coal. Detailed Description of the Preferred Embodiments

[0027] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the drawings.

[0028] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms may change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0029] Refer to Figure 1, this embodiment provides a device for uniformly sampling and preserving furnace coal, including that the whole device is sealed, which can not only achieve uniform sampling of coal samples, but also effectively prevent the loss of moisture during the sampling process, ensuring the representativeness and safety of the samples.

[0030] A storage element 1, including a coal sample storage hopper 11;

[0031] A packing element 2, transporting the coal sample of the storage element 1 into the packing element 2 for packing;

[0032] Among them, the coal sample storage hopper 11 is longitudinally provided with a number of sub-hoppers successively forming a grading and stirring area. The design of each sub-hopper is aimed at ensuring that the coal sample is fully mixed at different stages, thereby improving the uniformity and representativeness of the final sample. And a splash-proof baffle 12 is arranged at the top of the longitudinal stirring area to prevent the coal sample from splashing out of the container due to vibration during the stirring process, causing sample loss or contamination.

[0033] First, the crushed coal sample is fed into the coal sample storage hopper 11 of the storage element 1. During this process, the coal sample will pass through the grading and stirring area, where the coal sample is fully mixed under the action of the spiral stirrer, and at the same time, the splash-proof baffle 12 at the top effectively prevents the coal sample from splashing. Subsequently, the fully stirred coal sample is evenly transported into the packing element 2 by a vibrating feeder at a preset frequency. In the packing element 2, the coal sample is automatically made into bags and sealed to form independent packaging units. The whole process is monitored by a PLC control system to ensure accurate operation, achieving the goal of "coal samples not touching the ground", and improving the sampling efficiency and sample quality.

[0034] Referring to Figures 2 - 3 , as an alternative embodiment, the storage element 1 further optimizes its structural design to improve the uniformity and processing efficiency of the coal sample. Specifically, the storage element 1 not only includes the coal sample storage hopper 11, but also installs a vibrating motor 19 on its circumferential side wall to solve the problem that the coal sample adheres to the hopper wall when the coal quality is wet, ensuring the smooth falling of the coal sample. A spiral stirrer 13 is arranged at the feeding port to preliminarily mix the coal sample entering the storage hopper 11.

[0035] The storage element 1 further includes a vibrating motor 19. The vibrating motor 19 is located on the circumferential side wall of the coal sample storage hopper 11, and a spiral stirrer 13 is arranged at the feeding port of the coal sample storage hopper 11.

[0036] The storage element 1 also includes a weighing sensor 14 positioned between the grading and mixing zones. The discharge port at the bottom of the coal sample storage hopper 11 directs the raw material through an inclined surface A. Within the grading and mixing zone, a weighing sensor 14 is positioned between each grading hopper 17, enabling real-time monitoring of changes in the weight of the coal sample within each grading hopper to ensure consistent and accurate coal sample distribution. The inclined surface A at the bottom of the coal sample storage hopper 11 allows for more efficient coal sample delivery to the next processing step.

[0037] A driving motor 15 is provided at the top of the coal sample storage hopper 11, and a scraper 16 is installed on the side wall of the output shaft of the driving motor 15. Several scrapers 16 are respectively located inside the grading hopper 17 and are staggered. The scrapers 16 are rotated by the driving motor 15 to mix the raw materials.

[0038] The discharge openings 18 on the side walls of the grading hoppers 17 are staggered, and the scrapers 16 are arranged in a triangular shape. The inclined surfaces of the scrapers 16 fit closely with the inner wall of the grading hoppers 17. When the drive motor 15 is activated, the scrapers 16 rotate, thoroughly mixing the coal sample. To further enhance the mixing effect, the discharge openings 18 on the side walls of the grading hoppers 17 are also staggered, and the scrapers 16 are designed in a triangular shape. Their inclined surfaces fit closely with the inner wall of the grading hopper 17, preventing coal sample residue and ensuring thorough mixing.

[0039] Reference Figures 4 - 5 In one embodiment provided in the present application, the design of the splash shield 12 further optimizes the protective measures during the coal sample processing.

[0040] The splash shield 12 includes an inclined plate 121 arranged on the side wall of the output shaft of the driving motor 15 . A toggle plate 122 is installed on the top of the inclined plate 121 . The toggle plate 122 is sleeved on the side wall of the output shaft for toggling the inclined plate 121 .

[0041] The tilt plate 121 is divided into two zones, zone B and zone C, connected by a spring hinge 123. Zone B is heavier than zone C, allowing the two zones to be flexibly adjusted in angle as needed. Specifically, zone B is designed to be heavier than zone C to ensure that, in the absence of external forces, zone B remains lower while zone C remains higher.

[0042] It should be noted that, during the rotation, the toggle plate 122 will suppress the higher area C so that the inclined plate 121 is gradually in a parallel state. Since area B is designed to be heavier than area C, without the suppression of the toggle plate 122, the inclined plate 121 returns to its original position by its own gravity, causing it to produce relative movement between areas B and C, forming a dynamic barrier. This design is particularly suitable for processing coal samples with high humidity and easy adhesion, and effectively solves the shortcomings of traditional anti-splash measures. At the same time, when the cover on the storage hopper 11 is opened, since the inclined plate 121 is inclined, area C is not suppressed by the cover, and area C is automatically opened 5-10 degrees by the spring hinge 123, and the inclined plate 121 and the cover are staggered, so that it will not splash directly onto the observer even during the stirring process.

[0043] In actual operation, after the coal sample enters the coal sample storage hopper 11, it is first preliminarily mixed by the spiral stirrer 13. As the drive motor 15 starts, it drives the scraper 16 to fully stir the coal sample. At this time, the splash guard 12 located on the side wall of the output shaft of the drive motor 15 also starts to play a role.

[0044] The core component of the splash guard 12 is the tilting plate 121, which is divided into sections B and C, connected by spring hinges 123. Section B is heavier and typically maintained at a lower angle, while section C is lighter and positioned higher. When the drive motor 15 is running, the shifting plate 122 rotates with the output shaft and shifts the tilting plate 121, causing relative motion between sections B and C, forming a dynamic barrier.

[0045] This dynamic adjustment mechanism ensures that even if significant vibrations or a tendency for coal sample to splash occur during the coal sample stirring process, the inclined plate 121 can quickly respond, effectively preventing coal sample splashing by leveraging its own weight distribution and the elastic recovery capabilities of the spring hinge 123. Furthermore, the dual-zone design of the inclined plate 121 (Zones B and C) allows for adaptive angle adjustment based on the characteristics of the coal sample and the stirring intensity, providing optimal splash prevention.

[0046] Reference Figure 1 In one embodiment provided in the present application, the packaging element 2 includes a reduction belt conveyor 21, wherein the reduction belt conveyor 21 takes samples through a reducer 22 and transports them to the final coal conveyor belt conveyor 23, and the coal sampled by the remaining reduction belt conveyors 21 is transported to the lower belt through the waste lifting link, wherein this lower representative enters the next procedure.

[0047] A lifting hopper 24 is provided below the final-stage coal conveyor belt 23 , and an automatic packing device 25 is provided below the lifting hopper 24 .

[0048] A finished product conveyor belt 26 is provided below the automatic packaging device 25 , and the finished product conveyor belt 26 is used to transport the coal sample to the sample receiving machine 27 .

[0049] The crushed coal sample is first conveyed by the storage element 1 to the reduction belt conveyor 21. Here, the reduction belt conveyor 21 conducts the primary reduction of the coal sample through the built-in reducer 22. The reducer 22 selects an appropriate amount of coal sample according to preset parameters (such as weight or volume) and transports it to the final-stage coal conveyor 23. The remaining unselected coal samples are returned to the production process through the waste lifting link to avoid waste.

[0050] The reduced coal sample continues to be transported to the next level through the final-stage coal conveyor 23. During this process, the coal sample is stably and continuously fed into the hoist hopper 24. The hoist hopper 24 is responsible for lifting the coal sample to a height suitable for the operation of the automatic packing device 25 to ensure that the coal sample can smoothly enter the packaging process.

[0051] An automatic packing device 25 is arranged below the hoist hopper 24, and this device integrates functions of bag making, filling, and sealing. When the coal sample reaches the designated position, the automatic packing device 25 will start corresponding processes, including a series of steps such as making empty packaging bags, filling the coal sample, and sealing, and finally form an independently packaged coal sample bag.

[0052] The packed coal sample bags are conveyed to the sample receiver 27 through the finished product conveyor belt 26. The finished product conveyor belt 26 not only ensures the smooth transportation of the coal sample bags but also can adjust the speed according to needs to adapt to the processing requirements of different batches of coal samples. The sample receiver 27 is responsible for receiving and storing these packaged coal sample bags to prepare for subsequent analysis or storage. The whole process is hermetically sealed, which can effectively improve the accuracy of sampling.

[0053] Refer to Figure 7 , in some embodiments, in this embodiment, in a preferred embodiment provided by the present application, in order to further optimize the fluidity during the coal sample processing and reduce material residue, the discharge port 18 on the side wall of the grading hopper 17 is changed from the original rhombus shape to a circular shape.

[0054] Several scrapers 16 are arranged inside each grading hopper 17. These scrapers are respectively located inside the grading hopper and are arranged in a staggered manner. The driving motor 15 drives the scrapers 16 to rotate to fully mix the coal sample.

[0055] In this embodiment, the discharge port 18 is designed to be circular to improve the fluidity of the coal sample and reduce the possibility of the coal sample adhering to the edge of the discharge port. The design of the circular discharge port is based on the principle of fluid mechanics and can more effectively guide the smooth outflow of the coal sample, avoiding the problems of material accumulation and blockage that may occur in the traditional rhombus discharge port.

[0056] The scraper 16 is designed in a triangular shape, and its inclined surface is closely attached to the inner wall of the grading hopper 17 to ensure that the coal sample can be completely removed during rotation, preventing the coal sample from remaining in the grading hopper, thereby ensuring the uniformity and representativeness of the coal sample.

[0057] Referring to Figure 6 and Figure 8 , in some embodiments, in this embodiment, in order to optimize the fluidity during coal sample processing and reduce material residue, the discharge port 18 on the side wall of the grading hopper 17 is changed from the original diamond shape to a rectangular or triangular shape.

[0058] Several scrapers 16 are provided inside each grading hopper 17. These scrapers are respectively located inside the grading hopper and are arranged in a staggered manner. The driving motor 15 drives the scraper 16 to rotate to fully mix the coal sample.

[0059] In this embodiment, the discharge port 18 is designed to be rectangular or triangular to improve the fluidity of the coal sample and reduce the possibility of the coal sample adhering to the edge of the discharge port. Compared with the diamond design, the rectangular discharge port can provide a wider and more uniform outlet area, enabling the coal sample to flow out more smoothly, while reducing the problems of material accumulation and blockage caused by irregular shapes.

[0060] The scraper 16 is designed in a rectangular or triangular shape, and its inclined surface is closely attached to the inner wall of the grading hopper 17 to ensure that the coal sample can be completely removed during rotation, preventing the coal sample from remaining in the grading hopper.

[0061] Finally, it should be noted that the methods and devices described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A device for evenly sampling and preserving furnace coal, characterized in that: include, A storage element (1) comprising a coal sample storage hopper (11); a packing element (2), wherein the coal sample in the storage element (1) is transported to the packing element (2) for packing; The coal sample storage hopper (11) is longitudinally provided with a plurality of sub-hoppers which sequentially form a graded stirring area, and a splash-proof baffle (12) is provided at the top of the longitudinal stirring area.

2. The coal sampling and preservation device for furnace coal according to claim 1, wherein: The storage element (1) further comprises a vibration motor (19), wherein the vibration motor (19) is located on the circumferential side wall of the coal sample storage hopper (11), and a spiral stirrer (13) is provided at the feed port of the coal sample storage hopper (11).

3. The furnace coal uniform sampling and preservation device according to claim 2, characterized in that: The storage element (1) further comprises a weighing sensor (14) arranged between the graded stirring areas, and the discharge port at the bottom end of the coal sample storage hopper (11) discharges the raw materials through the inclined surface (A).

4. The furnace coal uniform sampling and preservation device according to claim 3, characterized in that: A driving motor (15) is provided at the top of the coal sample storage hopper (11), and a scraper (16) is installed on the side wall of the output shaft of the driving motor (15). A plurality of the scrapers (16) are respectively located inside the grading hopper (17) and are arranged in a staggered manner. The driving motor (15) drives the scrapers (16) to rotate and mix the raw materials.

5. The furnace coal uniform sampling and preservation device according to claim 4, characterized in that: The discharge openings (18) on the side walls of the grading hopper (17) are arranged in a staggered manner, and the scrapers (16) are arranged in a triangular shape, and the inclined surfaces of the scrapers (16) are in contact with the inner wall of the grading hopper (17).

6. The furnace coal uniform sampling and preservation device according to claim 5, characterized in that: The splash shield (12) comprises an inclined plate (121) arranged on the side wall of the output shaft of the drive motor (15); a toggle plate (122) is installed on the top end of the inclined plate (121); and the toggle plate (122) is sleeved on the side wall of the output shaft for toggling the inclined plate (121).

7. The coal sampling and preservation device for furnace coal according to claim 6, characterized in that: The inclined plate (121) is arranged in two regions, namely, region B and region C. Region B and region C are connected via a spring hinge (123), and region B is heavier than region C.

8. The furnace coal uniform sampling and preservation device according to claim 7, characterized in that: The packing element (2) includes a reduction belt conveyor (21), wherein the reduction belt conveyor (21) takes samples through a reducer (22) and transports them to the final coal conveyor belt conveyor (23), and the remaining coal sampled by the reduction belt conveyor (21) is transported to the lower belt through a waste lifting link.

9. The coal sampling and preservation device for furnace coal according to claim 8, wherein: A lifting hopper (24) is provided below the final-stage coal conveyor belt (23), and an automatic packaging device (25) is provided below the lifting hopper (24).

10. The furnace coal uniform sampling and preservation device according to claim 9, characterized in that: A finished product conveyor belt (26) is provided below the automatic packaging device (25), and the finished product conveyor belt (26) is used to transport the coal sample to the sample receiving machine (27).

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