Automatic passive ash sampling device, detection device and ash detection method
By using an automatic passive ash sampling device, automatic quantitative sampling is achieved through material flow detection and control devices. This solves the problems of poor representativeness, high labor intensity, low efficiency and high cost in existing coal ash detection technologies, and realizes efficient and accurate ash measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JINING HUARUI AUTOMATION TECH
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-14
AI Technical Summary
Existing coal ash content testing technologies suffer from problems such as poor representativeness, high labor intensity, low efficiency, high cost, and inaccurate measurement. In particular, automatic sampling devices lack quantitative sampling mechanisms and have high maintenance costs.
An automatic passive ash sampling device is adopted, including a material flow detection device, a sampling component, a receiving device, a scraper, and a control device. The material flow detection device monitors the material thickness and controls the sampling time of the sampling component to achieve automatic quantitative sampling, reduce labor intensity, improve sampling efficiency, and ensure sampling consistency.
It enables automated quantitative sampling, reduces labor intensity, improves sampling efficiency, ensures sampling consistency, reduces maintenance costs, avoids sample stratification, and improves the accuracy of ash content measurement.
Smart Images
Figure CN122385256A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ash content detection technology, and in particular to an automatic passive ash content sampling device, detection device, and ash content detection method. Background Technology
[0002] Coal ash content is an important parameter for measuring coal quality and is closely related to the calorific value of coal. It is one of the main indicators for evaluating coal quality. The calorific value of coal can be estimated through ash content. The detection of coal ash content plays an important role in the efficient and clean utilization of coal resources. Therefore, how to quickly and accurately detect the ash content of coal has become an important research direction in the current coal industry.
[0003] Traditional coal ash content testing technologies are no longer sufficient to meet industry demands, leading to the emergence of various new online measurement technologies. These include using electronic belt scales or laser scanners to acquire instantaneous load as a key parameter to determine coal ash content, or employing radiation measurement techniques (such as active ash analyzers) for ash content detection. Existing technologies mainly offer the following solutions, but each has significant limitations: First, the direct detection scheme without sampling device: This scheme does not set up a sampling device and directly detects the coal transported on the conveyor belt through the ash detection device. However, due to the uneven distribution of coal flow on the cross section of the belt, the measurement results are greatly limited and the ash content is poorly representative, which affects the practical application effect.
[0004] Second, the manual sampling method: In this method, the ash sampling device is independent of the coal conveying device. Typically, coal samples are manually loaded into sampling boxes, which are then placed on the ash sampling device. Finally, the ash detection device analyzes the samples. This method is labor-intensive, inefficient, and makes it difficult to guarantee sampling consistency.
[0005] Third, automatic sampling schemes: While some automatic sampling devices achieve automatic sampling, they lack quantitative sampling mechanisms, leading to inaccurate ash content measurements. Other devices control the suction head to adsorb coal using an external air pump, and use a tension gauge to weigh the suction head. Once the set weight is reached, the air pump stops, and the coal in the suction head falls into the sampling box below. These devices have the following prominent problems: 1. A filter needs to be installed at the suction head, requiring regular maintenance or replacement, increasing workload, reducing detection efficiency, and raising detection costs. 2. The air pump suction prioritizes adsorbing lightweight, small-particle coal powder (usually with higher ash content), while large-particle coal lumps (usually with lower ash content) are easily not sucked in or fall off prematurely due to gravity, resulting in higher ash content in the collected samples. Furthermore, particles of different sizes have different trajectories in the airflow; finer particles are more easily adsorbed and remain at the filter, causing natural sample stratification, poor sample representativeness, and affecting the accuracy of ash content measurement.
[0006] Therefore, there is an urgent need to develop an efficient, accurate, and low-cost automatic passive ash sampling device, detection device, and ash detection method. Summary of the Invention
[0007] The purpose of this invention is to provide an automatic passive ash sampling device, a detection device, and an ash detection method to solve the problems existing in the prior art. It achieves automatic quantitative sampling with a relatively simple mechanical structure, reduces labor intensity, improves sampling efficiency, ensures sampling consistency, and has lower maintenance costs compared to suction head sampling. It does not cause sample stratification and can ensure the accuracy of ash measurement.
[0008] To achieve the above objectives, the present invention provides the following solution: This invention provides an automatic passive ash sampling device, comprising a material flow detection device, a sampling component, a receiving device, a scraper, and a control device. The material flow detection device and the sampling component are both connected to the control device. The material flow detection device monitors the thickness of the material on the material conveying device. The sampling component performs sampling during the operation of the material conveying device. The control device controls the sampling time of the sampling component based on the material thickness detected by the material flow detection device. The sampling component transfers the acquired material to the receiving device, ensuring that the material fills the receiving cavity of the receiving device and overflows naturally. The scraper scrapes off the material overflowing from the receiving device.
[0009] Preferably, the sampling component includes a bucket, a first driving device, and a second driving device. Both the bucket and the second driving device are connected to the first driving device, and the bucket is also connected to the second driving device. The first driving device can drive the bucket to move towards or away from the material conveying device. The second driving device can cause the bucket to rotate relative to the second driving device and position the bucket opening in a material-collecting position, a material-carrying position, or a material-discharging position. When the bucket opening is in the material-collecting position, the bucket opening faces a first direction, and material on the material conveying device can enter the bucket through the bucket opening. The first direction is opposite to the transmission direction of the material conveying device. When the bucket opening is in the material-carrying position, the material inside the bucket can be kept inside the bucket. When the bucket opening is in the material-discharging position, the material inside the bucket can fall out of the bucket under gravity. The control device is communicatively connected to the material flow detection device. The control device is connected to both the first driving device and the second driving device.
[0010] Preferably, the second driving device includes a driving body and a connecting rod assembly, the connecting rod assembly being rotatably connected to the output end of the driving body and the bucket; the output end of the driving body is capable of extending and retracting along its own axis and rotating the bucket relative to the connecting rod assembly until the opening of the bucket is in the material picking position, the material conveying position, or the material unloading position.
[0011] Preferably, the linkage assembly includes a first linkage and a second linkage. The first end of the first linkage is rotatably connected to the bucket, the first end of the second linkage is rotatably connected to the output end of the first drive device, the second end of the first linkage is rotatably connected to the second end of the second linkage, and the second ends of both the first linkage and the second linkage are rotatably connected to the output end of the drive body.
[0012] Preferably, the device further includes a frame. The receiving device includes a receiving body and a receiving displacement device. The receiving body is fixedly connected to the output end of the receiving displacement device. The receiving displacement device can move the receiving body to directly below the bucket or to the outside of the bucket. The receiving displacement device is connected to the control device. The scraper is fixedly connected to the frame. When the receiving displacement device moves the receiving body away from the bucket, the scraper can scrape the material higher than the receiving body to level it.
[0013] Preferably, the receiving body is disposed above the material conveying device. The receiving body includes a discharge drive device, a discharge gate, and a storage cylinder with openings at both ends. The discharge gate is movably connected to the bottom opening of the storage cylinder. The discharge gate is connected to the discharge drive device, which can keep the discharge gate in a closed or open state. The discharge drive device is connected to the control device.
[0014] Preferably, it also includes a weighing device, which is installed below the receiving body and connected to the control device. The weighing device is capable of obtaining the weight of the material in the receiving body. Shielding layers are fixedly connected to the side wall of the storage cylinder and the discharge gate.
[0015] The present invention also provides an automatic passive ash content detection device, including an ash content detection device and the aforementioned automatic passive ash content sampling device, wherein the ash content detection device is used to perform ash content detection on the sample acquired by the sampling component.
[0016] The present invention also provides an ash content detection method based on the aforementioned automatic passive ash content sampling device, comprising the following steps: The thickness information of the material on the material conveying device is obtained by the material flow detection device; The sampling component performs sampling during the operation of the material conveying device; the control device controls the sampling time of the sampling component according to the material thickness detected by the material flow detection device; the control device controls the sampling component to transfer the acquired material to the receiving device, so that the material fills the receiving cavity of the receiving device and overflows naturally; the scraper scrapes off the material overflowing from the receiving device, so that the material in the receiving device is flush with the upper opening of the receiving cavity; The weight of the material contained in the receiving device is obtained based on the density of the material and the volume of the receiving cavity.
[0017] Preferably, the sampling component includes a bucket, a first driving device, and a second driving device. Both the bucket and the second driving device are connected to the first driving device, and the bucket is also connected to the second driving device. The first driving device can drive the bucket to move towards or away from the material conveying device. The second driving device can cause the bucket to rotate relative to the second driving device and position the bucket opening in a material-collecting position, a material-carrying position, or a material-discharging position. When the bucket opening is in the material-collecting position, the bucket opening faces a first direction, and material on the material conveying device can enter the bucket through the bucket opening. The first direction is opposite to the transmission direction of the material conveying device. When the bucket opening is in the material-carrying position, the material inside the bucket can be kept inside the bucket. When the bucket opening is in the material-discharging position, the material inside the bucket can fall out of the bucket under gravity. The control device is connected to both the first driving device and the second driving device. It also includes: the control device controls the opening of the bucket to be in the material-collecting position via the second drive device; the control device controls the bucket to descend a first set distance via the first drive device based on the thickness information obtained by the material flow detection device, so that the material on the material conveying device enters the bucket through the opening of the bucket for sampling; when the sampling time of the bucket reaches a set time, the control device controls the second drive device to drive the bucket to rotate until the opening of the bucket is in the material-carrying position, and the control device controls the first drive device to drive the bucket to rise a second set distance, so that the bucket disengages from the material on the material conveying device, thus completing the sampling of the bucket; The sampling method of the bucket further includes: real-time detection of the thickness information of the material on the material conveying device by the material flow detection device; the control device obtains the theoretical sampling time of the bucket based on the minimum thickness of the material on the material conveying device obtained by the material flow detection device; and makes the actual sampling time of the bucket greater than the theoretical sampling time.
[0018] The present invention achieves the following technical effects compared to the prior art: This invention provides an automatic passive ash sampling device, a detection device, and an ash detection method, including a material flow detection device, a sampling component, a receiving device, a scraper, and a control device. The material flow detection device and the sampling component are both connected to the control device. The material flow detection device is used to monitor the thickness of the material on the material conveying device. The sampling component is used to sample materials during the operation of the material conveying device; the control device can control the sampling time of the sampling component according to the material thickness detected by the material flow detection device; the sampling component can transfer the acquired material to the receiving device, and can make the material fill the receiving cavity of the receiving device and overflow naturally; the scraper is used to scrape off the material overflowing from the receiving device. This invention obtains the thickness information of the material on the material conveying device through the material flow detection device; enables the sampling component to sample during the operation of the material conveying device; controls the sampling time of the sampling component according to the material thickness detected by the material flow detection device through the control device; controls the sampling component to transfer the acquired material to the receiving device, making the material fill the receiving cavity of the receiving device and overflow naturally; scrapes off the material overflowing from the receiving device through the scraper, keeping the material in the receiving device flush with the upper opening of the receiving cavity; and obtains the weight of the material contained in the receiving device based on the density of the material and the volume of the receiving cavity.
[0019] This invention achieves automatic quantitative sampling with a relatively simple mechanical structure, reducing labor intensity, improving sampling efficiency, ensuring sampling consistency, and having lower maintenance costs compared to suction head sampling. It does not cause sample stratification and can ensure the accuracy of ash content measurement. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the structure of an automatic passive ash sampling device provided in some embodiments; Figure 2 Schematic diagrams of the receiving device provided in some embodiments; Figure 3 Schematic diagram of the receiving body provided in some embodiments Figure 1 ; Figure 4 Schematic diagram of the receiving body provided in some embodiments Figure 2 ; Figure 5Schematic diagram of the structure of the automatic passive ash content detection device provided in some embodiments Figure 1 ; Figure 6 Schematic diagram of the structure of the automatic passive ash content detection device provided in some embodiments Figure 2 ; In the diagram: 100, Automatic passive ash content detection device; 1, Sampling component; 101, Bucket; 102, First drive device; 103, Drive body; 104, First connecting rod; 105, Second connecting rod; 2, Material flow detection device; 3, Control device; 4, Material conveying device; 5, Receiving body; 501, Discharge drive device; 502, Discharge gate; 503, Storage cylinder; 504, Shielding layer; 6, Receiving and shifting device; 7, Weighing device; 8, Scraper; 9, Ash content detection device. Detailed Implementation
[0022] 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.
[0023] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "center," "longitudinal," "transverse," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "clockwise," and "counterclockwise," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0025] The purpose of this invention is to provide an automatic passive ash sampling device, a detection device, and an ash detection method to solve the problems existing in the prior art. It achieves automatic quantitative sampling with a relatively simple mechanical structure, reduces labor intensity, improves sampling efficiency, ensures sampling consistency, and has lower maintenance costs compared to suction head sampling. It does not cause sample stratification and can ensure the accuracy of ash measurement.
[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0027] Example 1 like Figures 1-6 As shown, this embodiment provides an automatic passive ash sampling device 100, including a sampling component 1, a material flow detection device 2, a material receiving device, a scraper 8, and a control device 3. The material flow detection device 2 and the sampling component 1 are both connected to the control device 3. The material flow detection device 2 is used to monitor the thickness of the material on the material conveying device 4. The sampling component 1 is used to sample during the operation of the material conveying device 4; the control device 3 can control the sampling time of the sampling component 1 according to the material thickness detected by the material flow detection device 2; the sampling component 1 can transfer the acquired material to the receiving device, and can make the material fill the receiving cavity of the receiving device and overflow naturally; the scraper 8 is used to scrape off the material overflowing from the receiving device.
[0028] The thickness information of the material on the material conveying device 4 is obtained by the material flow detection device 2; the sampling component 1 samples during the operation of the material conveying device 4; the sampling time of the sampling component 1 is controlled by the control device 3 according to the material thickness detected by the material flow detection device 2, so that the single sampling amount of the sampling component 1 is greater than the set sampling amount (less than or equal to the maximum sampling amount of the sampling component 1), thereby reducing the number of samplings of the sampling component 1 and improving the sampling efficiency; the control device 3 controls the sampling component 1 to transfer the acquired material to the receiving device, so that the material fills the receiving cavity of the receiving device and overflows naturally; the scraper 8 scrapes off the material overflowing from the receiving device, so that the material in the receiving device is flush with the upper opening of the receiving cavity; the weight of the material in the receiving device is obtained according to the density of the material and the volume of the receiving cavity, thereby realizing automatic quantitative sampling. This embodiment realizes automatic quantitative sampling with a relatively simple mechanical structure, which reduces labor intensity, improves sampling efficiency, ensures sampling consistency, and has low maintenance cost compared with suction head sampling, does not cause sample stratification, and can ensure the accuracy of ash content measurement.
[0029] In some specific embodiments, the sampling component 1 is large in size, and the single sampling amount of the sampling component 1 reaches the set sampling amount, so that the sampling component 1 can fill the receiving cavity of the receiving device; or when the single sampling of the sampling component 1 is insufficient to fill the receiving cavity of the receiving device, the sampling component 1 can sample and transfer the material multiple times until the receiving cavity of the receiving device is filled.
[0030] In some specific embodiments, the sampling component 1 includes a bucket 101, a first drive device 102, and a second drive device. Both the bucket 101 and the second drive device are connected to the first drive device 102, and the bucket 101 is connected to the second drive device. The first drive device 102 can drive the bucket 101 to move towards or away from the material conveying device 4. The second drive device can cause the bucket 101 to rotate relative to the second drive device and position the opening of the bucket 101 in a material-taking position, a material-carrying position, or a material-unloading position. When the opening of the bucket 101 is in the material-taking position, the opening of the bucket 101 faces a first direction, and the material on the material conveying device 4 can enter the bucket 101 through the opening of the bucket 101. The first direction is opposite to the transmission direction of the material conveying device 4. When the opening of the bucket 101 is in the material-carrying position, the material in the bucket 101 can be kept inside the bucket 101. When the opening of the bucket 101 is in the material-unloading position, the material in the bucket 101 can fall out of the bucket 101 under the action of gravity. The control device 3 is communicatively connected to the material flow detection device 2; the control device 3 is also connected to the first drive device 102 and the second drive device.
[0031] The thickness of the material on the material conveying device 4 is obtained by the material flow detection device 2. The control device 3 calculates the downward distance of the bucket 101 and the sampling time based on the thickness information obtained by the material flow detection device 2. The control device 3 controls the opening of the bucket 101 to be in the material-collecting position via the second drive device, and controls the bucket 101 to descend a specific distance via the first drive device 102. At this time, the bucket 101 enters the material, and the opening of the bucket 101 is opposite to the conveying direction of the material conveying device 4. The material enters the bucket 101. After the sampling time is reached, the control device 3 drives the bucket 101 to rotate until the opening of the bucket 101 is in the material-carrying position via the second drive device, and controls the first drive device 102 to drive the bucket 101 to rise a second set distance, completing the automatic sampling. This embodiment achieves automatic sampling through the cooperation of the material flow detection device 2 and the bucket 101 mechanism. The structure is simple, the sampling efficiency is improved, the sampling cost is reduced, and the accuracy of the detection is improved.
[0032] In some specific embodiments, the bucket 101, the first drive device 102, and the second drive device are all arranged above the material conveying device 4, and the bucket 101 scoops material from the material conveying device 4.
[0033] In some specific embodiments, the bucket 101 is located at the unloading end of the material conveying device 4. When the bucket 101 descends to sample, the material on the material conveying device 4 falls into the bucket 101.
[0034] In some specific embodiments, the second driving device includes a driving body 103 and a connecting rod assembly, the connecting rod assembly being rotatably connected to the output end of the driving body 103 and the bucket 101; the output end of the driving body 103 can extend and retract along its own axis and rotate the bucket 101 relative to the connecting rod assembly to the position of the opening of the bucket 101 being in the material picking position, the material conveying position or the material unloading position.
[0035] In some specific embodiments, the linkage assembly includes a first linkage 104 and a second linkage 105. The first end of the first linkage 104 is rotatably connected to the bucket 101, the first end of the second linkage 105 is rotatably connected to the output end of the first drive device 102, the second end of the first linkage 104 is rotatably connected to the second end of the second linkage 105, and the second ends of both the first linkage 104 and the second linkage 105 are rotatably connected to the output end of the drive body 103.
[0036] In some specific embodiments, the first end of the second connecting rod 105 is indirectly connected to the output end of the first driving device 102 through a connecting block, that is, the output end of the first driving device 102 is fixedly connected to the connecting block, and the first end of the second connecting rod 105 is rotatably connected to the connecting block.
[0037] In some specific embodiments, the receiving device includes a receiving body 5 and a receiving displacement device 6. The receiving body 5 is fixedly connected to the output end of the receiving displacement device 6. The receiving displacement device 6 can drive the receiving body 5 to move directly below the bucket 101 or to the outside of the bucket 101. The receiving displacement device 6 is connected to the control device 3.
[0038] In some specific embodiments, the receiving body 5 is disposed above the material conveying device 4. The receiving body 5 includes a discharge driving device 501, a discharge gate 502, and a storage cylinder 503 with openings at both ends. The discharge gate 502 is movably connected to the bottom opening of the storage cylinder 503. The discharge gate 502 is connected to the discharge driving device 501. The discharge driving device 501 can make the discharge gate 502 either closed or open. The discharge driving device 501 is connected to the control device 3.
[0039] In some specific embodiments, a shielding layer 504 is fixedly connected to the side wall of the storage cylinder 503 and the discharge gate 502 to shield the measurement from external environmental interference and improve the accuracy of the measurement. Since the ash content measurement is performed inside the storage cylinder 503, the size and weight of the shielding layer 504 are reduced, enabling on-site installation in scenarios such as lightly loaded trestle bridges.
[0040] In some specific embodiments, a weighing device 7 is also included. The weighing device 7 is installed below the receiving body 5 and is connected to the control device 3. The weighing device 7 can obtain the weight of the material in the receiving body 5. On the one hand, it can calculate the ash content value by combining the weight information of the sampled material, so as to further improve the accuracy of detection. On the other hand, when the weighing device 7 detects that the weight of the sampled material is less than the set weight, it will lead to lower detection accuracy. In this case, the control device 3 controls the discharge gate 502 to open and directly release the material without performing ash content detection.
[0041] In some specific embodiments, a frame is also included, and the scraper 8 is fixedly connected to the frame. When the receiving body 5 is moved away from the bucket 101 by the receiving transfer device 6, the scraper 8 can scrape the material higher than the receiving body 5.
[0042] In some specific embodiments, the discharge gate 502 includes two gate bodies, each gate body being hinged to the storage cylinder 503; the discharge drive device 501 includes a motor, a reducer (preferably a worm gear reducer), a wire rope, a drive wheel, and multiple driven wheels. The drive wheel is fixedly connected to the output end of the reducer, and the reducer is connected to the motor. One end of the first wire rope is fixedly connected to the drive wheel, and the other end of the first wire rope passes over a driven wheel and is fixedly connected to a gate body; one end of the second wire rope is fixedly connected to the drive wheel, and the other end of the second wire rope passes over two driven wheels in sequence and is fixedly connected to another gate body.
[0043] In some specific embodiments, the sampling component 1 is installed above the material conveying device 4 (such as a belt) or at the discharge port, without occupying space on both sides.
[0044] In some specific embodiments, the material flow detection device 2 is a radar material flow sensor, and the first driving device 102, the driving body 103, and the material receiving and shifting device 6 are all linear driving devices such as electric cylinders, hydraulic cylinders, and air cylinders.
[0045] In some specific embodiments, the ash detection device 9 includes an industrial control computer, a gamma spectrometer, a multi-channel analyzer, etc. The specific structure and detection principle are existing technologies and will not be described in detail here.
[0046] Example 2 This embodiment provides an automatic passive ash content detection device 100, including an ash content detection device 9 and the automatic passive ash content sampling device 100 in Embodiment 1. The ash content detection device 9 is used to perform ash content detection on the sample obtained by the sampling component 1.
[0047] In some specific embodiments, the height of the ash content detection device 9 is higher than that of the receiving body 5, and it is placed on the moving path of the receiving body 5. After the receiving body 5 finishes receiving the material, it can be placed below the ash content detection device 9 by moving a specific distance away from the bucket 101 to complete the detection. In this embodiment, the material conveying device 4, the sampling component 1, the receiving body 5, and the ash content detection device 9 are arranged vertically, which helps to reduce the floor space occupied.
[0048] Example 3 This embodiment provides an ash content detection method based on the automatic passive ash content sampling device 100 in Embodiment 1, including the following steps: The thickness information of the material on the material conveying device 4 is obtained by the material flow detection device 2; the sampling component 1 performs sampling during the operation of the material conveying device 4; the sampling time of the sampling component 1 is controlled by the control device 3 according to the material thickness detected by the material flow detection device 2; the control device 3 controls the sampling component 1 to transfer the obtained material to the receiving device, so that the material fills the receiving cavity of the receiving device and overflows naturally; the material overflowing from the receiving device is scraped off by the scraper 8, so that the material in the receiving device is flush with the upper opening of the receiving cavity; the weight of the material in the receiving device is obtained according to the density of the material and the volume of the receiving cavity, thereby realizing automatic quantitative sampling and reducing the influence of factors such as coal quantity on the measurement.
[0049] In some specific embodiments, the control device 3 controls the opening of the bucket 101 to be in the material-collecting position through the second drive device; the control device 3 controls the first drive device 102 to descend a first set distance according to the thickness information obtained by the material flow detection device 2, so that the material on the material conveying device 4 enters the bucket 101 through the opening of the bucket 101 for sampling; when the sampling time of the bucket 101 reaches the set time, the control device 3 controls the first drive device 102 to drive the bucket 101 to rotate until the opening of the bucket 101 is in the material-carrying position, and the control device 3 controls the first drive device 102 to drive the bucket 101 to rise a second set distance, so that the bucket 101 is out of contact with the material on the material conveying device 4, and the sampling is completed.
[0050] The sampling method of the bucket 101 also includes: real-time detection of the thickness information of the material on the material conveying device 4 by the material flow detection device 2, and the control device 3 obtaining the theoretical sampling time of the bucket 101 based on the minimum thickness of the material on the material conveying device 4 obtained by the material flow detection device 2; so that the actual sampling time of the bucket 101 is greater than the theoretical sampling time, ensuring that the bucket 101 can obtain enough material to fill the receiving device with fewer sampling times.
[0051] In some specific embodiments, when the material flow detection device 2 detects that the material thickness is less than the set thickness, the control device 3 will not control the sampling device to operate and will not perform sampling. Only when the material thickness is greater than the set thickness will the control device 3 control the sampling device to perform sampling.
[0052] In some specific embodiments, when the bucket 101 moves upward a second predetermined distance and reaches its apex position, the receiving and shifting device 6 pushes the receiving body 5 below the bucket 101. The second driving device then drives the bucket 101 to perform an unloading action, unloading the sample onto the receiving body 5. After unloading is completed, the bucket 101 returns to its original position (material collection position), and the receiving and shifting device 6 moves the receiving body 5 to below the ash content detection device 9, where the ash content detection device 9 performs ash content measurement.
[0053] In some specific embodiments, after the measurement is completed, the motor inside the receiving body 5 rotates to release the wire rope, and the discharge gate 502 opens to its maximum under the action of gravity to discharge the material; after the material is discharged, the motor rotates to tighten the wire rope and pull the discharge gate 502 back. After the proximity sensor senses that the discharge gate 502 has returned to its original position, the motor stops moving. The worm gear reducer has a self-locking function, which can keep the discharge gate 502 stationary.
[0054] In some specific embodiments, the industrial computer of the control box can be set to automatic and manual modes. In automatic mode, the sampling interval time can be set, and the device can automatically perform multiple tests at the set sampling interval time. In manual mode, the device performs a sampling test once each time it is manually triggered.
[0055] This embodiment uses an intelligent sampling device, which can set different parameters (such as sampling frequency and the descent distance of bucket 101) according to different measurement locations, so that the measurement is optimized.
[0056] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. An automatic passive ash sampling device, characterized in that, The device includes a material flow detection device, a sampling component, a material receiving device, a scraper, and a control device. The material flow detection device and the sampling component are both connected to the control device. The material flow detection device is used to monitor the thickness of the material on the material conveying device. The sampling component is used to take samples during the operation of the material conveying device. The control device can control the sampling time of the sampling component according to the material thickness detected by the material flow detection device; the sampling component can transfer the acquired material to the receiving device, and can make the material fill the receiving cavity of the receiving device and overflow naturally; the scraper is used to scrape off the material overflowing from the receiving device.
2. The automatic passive ash sampling device according to claim 1, characterized in that, The sampling component includes a bucket, a first drive device, and a second drive device. Both the bucket and the second drive device are connected to the first drive device, and the bucket is also connected to the second drive device. The first drive device can drive the bucket to move towards or away from the material conveying device. The second drive device can cause the bucket to rotate relative to the second drive device and position the bucket opening in a material-collecting position, a material-carrying position, or a material-discharging position. When the bucket opening is in the material-collecting position, the bucket opening faces a first direction, and material from the material conveying device can enter the bucket through the bucket opening. The first direction is opposite to the transmission direction of the material conveying device. When the bucket opening is in the material-carrying position, the material inside the bucket can be kept inside the bucket. When the bucket opening is in the material-discharging position, the material inside the bucket can fall out of the bucket under gravity. The control device is communicatively connected to the material flow detection device; the control device is also connected to both the first drive device and the second drive device.
3. The automatic passive ash sampling device according to claim 2, characterized in that, The second drive device includes a drive body and a linkage assembly. The linkage assembly is rotatably connected to the output end of the drive body and the bucket. The output end of the drive body can extend and retract along its own axis and rotate the bucket relative to the linkage assembly until the opening of the bucket is in the material picking position, the material conveying position, or the material unloading position.
4. The automatic passive ash sampling device according to claim 3, characterized in that, The linkage assembly includes a first linkage and a second linkage. The first end of the first linkage is rotatably connected to the bucket, the first end of the second linkage is rotatably connected to the output end of the first drive device, the second end of the first linkage is rotatably connected to the second end of the second linkage, and the second ends of both the first linkage and the second linkage are rotatably connected to the output end of the drive body.
5. The automatic passive ash sampling device according to claim 2, characterized in that, It also includes a frame. The material receiving device includes a material receiving body and a material receiving displacement device. The material receiving body is fixedly connected to the output end of the material receiving displacement device. The material receiving displacement device can drive the material receiving body to move directly below the bucket or to the outside of the bucket. The material receiving displacement device is connected to the control device. The scraper is fixedly connected to the frame. When the material receiving displacement device drives the material receiving body to move away from the bucket, the scraper can scrape the material higher than the material receiving body to level it.
6. The automatic passive ash sampling device according to claim 5, characterized in that, The receiving body is located above the material conveying device. The receiving body includes a discharge drive device, a discharge gate, and a storage cylinder with openings at both ends. The discharge gate is movably connected to the bottom opening of the storage cylinder. The discharge gate is connected to the discharge drive device, which can keep the discharge gate in a closed or open state. The discharge drive device is connected to the control device.
7. The automatic passive ash sampling device according to claim 6, characterized in that, It also includes a weighing device, which is installed below the receiving body and connected to the control device. The weighing device can obtain the weight of the material in the receiving body. Shielding layers are fixedly connected to the side wall of the storage cylinder and the discharge gate.
8. An automatic passive ash content detection device, characterized in that, The device includes an ash content detection device and an automatic passive ash content sampling device as described in any one of claims 1 to 7, wherein the ash content detection device is used to perform ash content detection on the sample acquired by the sampling component.
9. A method for detecting ash content based on the automatic passive ash sampling device according to any one of claims 1 to 7, characterized in that, Includes the following steps: The thickness information of the material on the material conveying device is obtained by the material flow detection device; The sampling component performs sampling during the operation of the material conveying device; The control device controls the sampling time of the sampling component based on the material thickness detected by the material flow detection device. The control device controls the sampling component to transfer the acquired material to the receiving device, so that the material fills the receiving cavity of the receiving device and overflows naturally; the scraper scrapes off the material overflowing from the receiving device, so that the material in the receiving device is flush with the upper opening of the receiving cavity; The weight of the material contained in the receiving device is obtained based on the density of the material and the volume of the receiving cavity.
10. The ash content detection method according to claim 9, characterized in that, The sampling component includes a bucket, a first drive device, and a second drive device. Both the bucket and the second drive device are connected to the first drive device, and the bucket is also connected to the second drive device. The first drive device can drive the bucket to move towards or away from the material conveying device. The second drive device can cause the bucket to rotate relative to the second drive device and position the bucket opening in a material-collecting position, a material-carrying position, or a material-discharging position. When the bucket opening is in the material-collecting position, the bucket opening faces a first direction, and material from the material conveying device can enter the bucket through the bucket opening. The first direction is opposite to the transmission direction of the material conveying device. When the bucket opening is in the material-carrying position, the material inside the bucket can be kept inside the bucket. When the bucket opening is in the material-discharging position, the material inside the bucket can fall out of the bucket under gravity. The control device is connected to both the first drive device and the second drive device; It also includes: the control device controls the opening of the bucket to be in the material-collecting position via the second drive device; the control device controls the bucket to descend a first set distance via the first drive device based on the thickness information obtained by the material flow detection device, so that the material on the material conveying device enters the bucket through the opening of the bucket for sampling; when the sampling time of the bucket reaches a set time, the control device controls the second drive device to drive the bucket to rotate until the opening of the bucket is in the material-carrying position, and the control device controls the first drive device to drive the bucket to rise a second set distance, so that the bucket disengages from the material on the material conveying device, thus completing the sampling of the bucket; The sampling method of the bucket further includes: real-time detection of the thickness information of the material on the material conveying device by the material flow detection device; the control device obtains the theoretical sampling time of the bucket based on the minimum thickness of the material on the material conveying device obtained by the material flow detection device; and makes the actual sampling time of the bucket greater than the theoretical sampling time.