Limestone powder automatic sampling device and method

Abstract

This invention relates to the field of limestone powder sampling technology, and more particularly to an automatic limestone powder sampling device and method, comprising a controller, a powder unloading pipe, a sampling main pipe, sampling branch pipes, and an industrial image recognition camera for image recognition of the powder unloading tanker. One end of the sampling main pipe is connected to one end of a connecting pipe via a sampling main pipe inlet valve, and the other end of the connecting pipe is connected to the side wall of the powder unloading pipe. A sampling main pipe pressure transmitter is installed on the connecting pipe. One end of the sampling branch pipe is connected to the side wall of the sampling main pipe, and a branch pipe sampling valve is installed on the sampling branch pipe. A sampling bag is connected to the other end of the sampling branch pipe, and a weighing sensor for weighing the sampling bag is installed vertically below the sampling bag. The beneficial effects of this invention are: it realizes full automation of the sampling process, effectively solving multiple problems in traditional manual sampling. On the one hand, it significantly improves safety and efficiency by replacing manual operation; on the other hand, it improves sampling quality and reliability.

Description

Technical Field

[0001] This invention relates to the field of limestone powder sampling technology, and in particular to an automatic limestone powder sampling device and method. Background Technology

[0002] In the wet desulfurization process of coal-fired power plants, limestone powder serves as the desulfurization absorbent, and its material quality directly affects desulfurization efficiency, system stability, and subsequent acceptance and settlement of the limestone powder. Therefore, it is necessary to regularly sample and analyze the incoming limestone powder. However, existing manual sampling methods for limestone powder present a series of problems: traditional manual sampling poses a risk of dust inhalation (occupational diseases caused by dust), and the inconsistent timing and frequency of unloading from tank trucks daily results in significant manpower waste; single-point sampling cannot accurately reflect the overall powder quality of the truckload, potentially leading to higher testing errors; furthermore, manual recording of license plate and time information is prone to errors and omissions, resulting in inaccurate linking of sample batches to supplier quality records and a gap in quality control traceability.

[0003] Existing limestone powder sampling methods have the following technical drawbacks: 1. Existing automatic sampling devices often rely on timing or a single indicator (such as pressure changes) for control and determination of sampling start and end signals. Under actual operating conditions, if there is blockage in the pipeline downstream of the sampling tube pressure transmitter or a significant difference between the powder unloading time of the powder tanker and the normal time, the automatic sampling device will experience "false sampling" or "no sampling." This results in a high failure rate for existing automatic sampling devices, making it impossible to determine whether sampling was successful.

[0004] 2. The existing automatic sampling device only automatically samples limestone powder when it is unloaded, and it is not linked to vehicle information. It is difficult to trace the source of the automatically collected samples. In addition, manual labels are prone to misoperation, and paper records are easily lost, which affects sample management.

[0005] 3. After each automatic sampling, a large amount of residual sample remains in the sampling device. If it is not cleaned in time, it will not only contaminate the next batch of samples, but also clog and wear the sampling device, thus causing malfunctions. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an automatic limestone powder sampling device and method, which solves the problems of relying on manual operation for limestone powder sampling in thermal power plants and similar industrial scenarios, especially the pain points of high safety risks, poor representativeness, inaccurate sampling time control and difficulty in information traceability of manual sampling.

[0007] The technical solution of this invention to solve the above-mentioned technical problems is as follows: An automatic limestone powder sampling device includes a controller, a powder unloading pipe, a sampling main pipe, sampling branch pipes, and an industrial image recognition camera for image recognition of the powder unloading tanker. One end of the sampling main pipe is connected to one end of a connecting pipe through a sampling main pipe inlet valve, and the other end of the connecting pipe is connected to the side wall of the powder unloading pipe. A sampling main pipe pressure transmitter is provided on the connecting pipe. One end of the sampling branch pipe is connected to the side wall of the sampling main pipe, and a branch pipe sampling valve is provided on the sampling branch pipe. A sampling bag is connected to the other end of the sampling branch pipe, and a weighing sensor for weighing the sampling bag is provided vertically below the sampling bag. The controller is electrically connected to the industrial image recognition camera to receive image information. The controller is electrically connected to the sampling main pipe pressure transmitter to receive the pressure information in the sampling main pipe collected by the sampling main pipe pressure transmitter. The controller is electrically connected to the sampling main pipe inlet valve and the branch pipe sampling valve to control the opening and closing of the sampling main pipe inlet valve and the branch pipe sampling valve, respectively.

[0008] The beneficial effects of this invention are: it achieves full automation of the sampling process, effectively solving multiple problems in traditional manual sampling. On the one hand, replacing manual operation significantly improves safety and efficiency, replacing on-site manual work, further protecting worker safety, and improving work efficiency and sampling quality; automation also "saves manpower and resources," improving operational efficiency and reducing costs; this invention eliminates the need for workers to work at heights and endure long waits, avoiding the risk of falls and dust hazards associated with manually climbing tanker roofs for sampling, greatly reducing safety hazards. On the other hand, it improves sampling quality and reliability; real-time weighing feedback ensures that material is actually collected each time, avoiding "empty sampling" caused by pipeline blockage or misjudgment of time.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the sampling main tube is connected to a main tube backflushing cleaning mechanism for backflushing and cleaning the sampling main tube.

[0011] Furthermore, the backflush cleaning mechanism for the main pipe includes a backflush cleaning pipe, one end of which is connected to the sampling main pipe, and the other end of which is connected to a high-pressure air source. The backflush cleaning pipe is equipped with a compressed air inlet valve for the sampling main pipe.

[0012] The beneficial effects of adopting the above-mentioned further solution are: the main pipe backflushing cleaning mechanism can backflush and clean the sampling main pipe after one sampling, keep the sampling main pipe pipeline clean, reduce cross-contamination and maintenance work, thereby further improving the reliability of equipment operation.

[0013] Furthermore, the sampling branch pipe is connected to a branch pipe backflushing cleaning mechanism for backflushing and cleaning the sampling branch pipe.

[0014] Furthermore, the branch pipe backflushing cleaning mechanism includes a backflushing cleaning branch pipe, one end of which is connected to the sampling branch pipe, and the other end of which is connected to a high-pressure air source. The backflushing cleaning branch pipe is equipped with a sampling branch pipe compressed air inlet valve.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the branch pipe backflushing cleaning mechanism can backflush and clean the sampling branch pipe after one sampling, keep the sampling branch pipe pipeline clean, reduce cross-contamination and maintenance work, thereby further improving the reliability of equipment operation.

[0016] Furthermore, there are multiple sampling branch pipes, one end of each sampling branch pipe is connected to the side wall of the sampling main pipe, each sampling branch pipe is equipped with a branch pipe sampling valve, the other end of each sampling branch pipe is connected to a sampling bag, and a weighing sensor for weighing the sampling bag is provided vertically below each sampling bag.

[0017] The beneficial effects of adopting the above-mentioned further scheme are: by using multiple sampling branches and a timed short-time valve opening mechanism for the branch sampling valve, combined with pressure and weighing dual feedback, multi-point decentralized mixed sampling can be achieved.

[0018] Furthermore, the connecting pipe is equipped with a manual valve for the sampling main pipe.

[0019] The advantage of adopting the above-mentioned further solution is that it enables the pipeline to be shut down during long periods when sampling or maintenance is not required, thus ensuring safety.

[0020] This invention also provides an automatic limestone powder sampling method to solve the above-mentioned technical problems. The method uses the aforementioned automatic limestone powder sampling device for sampling and includes the following steps: Step 1, Sampling preparation: After the unloading tanker truck enters the designated unloading area, the industrial image recognition camera captures an image of the unloading tanker truck, and the controller establishes a task number based on the image captured by the industrial image recognition camera. Step 2: Sampling begins. The controller controls the opening of the inlet valve of the sampling main pipe, and then controls the opening of the sampling valve of the branch pipe, so that the limestone powder enters the sampling bag. The controller reads the weight measured by the designated weighing sensor in real time. Step 3, sampling terminates. When the controller detects that the weight measured by the weighing sensor has reached the set value, the controller controls the branch pipe sampling valve to close. Step four: Sample identification and data storage. The controller records the end timestamp of this sampling, the final weight of the sampling bag, the license plate number and the branch tube number, and generates an electronic tag with the above information.

[0021] The beneficial effects of adopting the above scheme are as follows: by introducing industrial image recognition, pressure feedback, gravity feedback, and sampling execution to build a linkage mechanism of recognition recording, intelligent sampling, and self-inspection judgment, sampling can be automatically triggered without human intervention when the powder unloading tanker enters the position and unloads powder, the sampling success can be determined in real time and the sampling can be terminated immediately, and information such as license plate number, sampling time, and sample weight can be automatically generated into electronic tags for archiving. This achieves full-process automated control and full-process traceability management of samples, greatly improves sampling accuracy, operational reliability, and maintenance efficiency, and completes the replacement of manual sampling.

[0022] Furthermore, in step one, while the industrial image recognition camera captures the image of the powder unloading tanker, the sampling main pipe pressure transmitter detects the pressure in the sampling main pipe in real time. If the pressure detected by the sampling main pipe pressure transmitter is greater than or equal to the set pressure within a set time period, then step two begins.

[0023] The beneficial effect of adopting the above-mentioned further solution is that when the pressure detected by the sampling main pipe pressure transmitter is greater than or equal to the set pressure within a continuous set time, it indicates that the inside of the sampling main pipe is connected to the powder unloading pipe, the pressure is normal, and normal sampling can be achieved.

[0024] Furthermore, in step two, if the controller reads that the weight detected by the weighing sensor has not changed within a set time, it determines that the sampling has failed.

[0025] The beneficial effect of adopting the above-mentioned further solution is that if the weight detected by the weighing sensor does not change within the set time, it indicates that no dust has entered the sampling bag, and the surface sampling fails.

[0026] Furthermore, in step three, if the sampling main pipe pressure transmitter detects that the pressure of the sampling main pipe is less than the set value within a set time, it determines that the powder unloading is completed, and the controller controls the branch pipe sampling valve to close. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention; The attached diagram lists the components represented by each number as follows: 1. Industrial image recognition camera; 2. Powder unloading tanker; 3. Controller; 4. Sampling main pipe pressure transmitter; 5. Sampling main pipe inlet valve; 6. Sampling main pipe manual valve; 7. Sampling main pipe compressed air inlet valve; 8. No. 1 sampling branch pipe compressed air inlet valve; 9. No. 2 sampling branch pipe compressed air inlet valve; 10. No. 3 sampling branch pipe compressed air inlet valve; 11. No. 1 branch pipe sampling valve; 12. No. 2 branch pipe sampling valve; 13. No. 3 branch pipe sampling valve; 14. No. 1 sampling bag; 15. No. 2 sampling bag; 16. No. 3 sampling bag; 17. No. 1 weighing sensor; 18. No. 2 weighing sensor; 19. No. 3 weighing sensor; 20. Powder unloading pipe; 21. Sampling main pipe; 22. No. 1 sampling branch pipe; 23. No. 2 sampling branch pipe; 24. No. 3 sampling branch pipe; 25. Backflush cleaning pipe; 26. Backflush cleaning branch pipe; 27. Connecting pipe. Detailed Implementation

[0028] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0029] Example 1 like Figure 1 As shown, this embodiment discloses an automatic limestone powder sampling device, including a controller 3 (PLC or DCS), a powder unloading pipe 20, a sampling main pipe 21, sampling branch pipes, and an industrial image recognition camera 1 for image recognition of the powder unloading tanker 2. One end of the sampling main pipe 21 is connected to one end of a connecting pipe 27 through a sampling main pipe inlet valve 5, and the other end of the connecting pipe 27 is connected to the side wall of the powder unloading pipe 20. A sampling main pipe pressure transmitter 4 is provided on the connecting pipe 27. One end of the sampling branch pipe is connected to the side wall of the sampling main pipe 21, and a branch pipe sampling device is provided on the sampling branch pipe. The sampling valve has a sampling bag connected to the other end of the sampling branch pipe. A weighing sensor for weighing the sampling bag is provided vertically below the sampling bag. The controller 3 is electrically connected to the industrial image recognition camera 1 to receive image information. The controller 3 is also electrically connected to the sampling main pipe pressure transmitter 4 to receive the pressure information in the sampling main pipe 21 collected by the sampling main pipe pressure transmitter 4. The controller 3 is further electrically connected to the sampling main pipe inlet valve 5 and the branch pipe sampling valve to control the opening and closing of the sampling main pipe inlet valve 5 and the branch pipe sampling valve, respectively.

[0030] The sampling header 21 is connected to a header backflushing cleaning mechanism for backflushing and cleaning the header 21. Specifically, the header backflushing cleaning mechanism includes a backflushing cleaning pipe 25, one end of which is connected to the sampling header 21, and the other end of which is connected to a high-pressure air source. The backflushing cleaning pipe 25 is equipped with a sampling header compressed air inlet valve 7. The header backflushing cleaning mechanism can backflush and clean the sampling header 21 after each sampling, keeping the sampling header 21 pipeline clean, reducing cross-contamination and maintenance work, thereby further improving the reliability of equipment operation.

[0031] The sampling branch pipe is connected to a branch pipe backflushing cleaning mechanism for backflushing and cleaning the sampling branch pipe. Specifically, the branch pipe backflushing cleaning mechanism includes a backflushing cleaning branch pipe 26, one end of which is connected to the sampling branch pipe, and the other end of which is connected to a high-pressure air source. The backflushing cleaning branch pipe 26 is equipped with a compressed air inlet valve for the sampling branch pipe. The branch pipe backflushing cleaning mechanism can backflush and clean the sampling branch pipe after each sampling, keeping the sampling branch pipe pipeline clean, reducing cross-contamination and maintenance work, thereby further improving the reliability of equipment operation.

[0032] In an embodiment of the present invention, the backflush cleaning pipe 25 is provided with a sampling main pipe compressed air inlet valve 7, and the number of backflush cleaning branch pipes 26 is three. The three backflush cleaning branch pipes 26 are respectively provided with a first sampling branch pipe compressed air inlet valve 8, a second sampling branch pipe compressed air inlet valve 9, and a third sampling branch pipe compressed air inlet valve 10. The sampling main pipe compressed air inlet valve 7, the first sampling branch pipe compressed air inlet valve 8, the second sampling branch pipe compressed air inlet valve 9, and the third sampling branch pipe compressed air inlet valve 10 are all connected to a controller and are controlled to open and close respectively by the controller.

[0033] In an embodiment of the present invention, there are multiple sampling branch pipes, one end of each sampling branch pipe is connected to the side wall of the sampling main pipe 21, each sampling branch pipe is provided with a branch pipe sampling valve, the other end of each sampling branch pipe is connected to a sampling bag, and a weighing sensor for weighing the sampling bag is provided vertically below each sampling bag. By adopting a timed short-time valve opening mechanism of multiple sampling branch pipes and branch pipe sampling valves, combined with pressure and weighing dual feedback, multi-point decentralized mixed sampling is realized.

[0034] In this embodiment, the sampling branch pipe includes a first sampling branch pipe 22, a second sampling branch pipe 23, and a third sampling branch pipe 24. The corresponding branch pipe sampling valves on the first sampling branch pipe 22, the second sampling branch pipe 23, and the third sampling branch pipe 24 are the first branch pipe sampling valve 11, the second branch pipe sampling valve 12, and the third branch pipe sampling valve 13, respectively. The sampling bags connected to the first sampling branch pipe 22, the second sampling branch pipe 23, and the third sampling branch pipe 24 are the first sampling bag 14, the second sampling bag 15, and the third sampling bag 16, respectively. The weighing sensors corresponding to the first sampling bag 14, the second sampling bag 15, and the third sampling bag 16 are the first weighing sensor 17, the second weighing sensor 18, and the third weighing sensor 19, respectively.

[0035] In other embodiments of the present invention, the number of sampling branches can be set according to actual needs.

[0036] The connecting pipe 27 is equipped with a manual sampling main pipe valve 6, which enables the pipe to be shut off when sampling or maintenance is not required for a long period of time, ensuring safety.

[0037] This embodiment achieves full automation of the sampling process, effectively solving multiple problems associated with traditional manual sampling. On the one hand, replacing manual operation significantly improves safety and efficiency, further protecting worker safety by replacing on-site manual work, while improving work efficiency and sampling quality; automation also "saves manpower and resources," improving operational efficiency and reducing costs; this invention eliminates the need for workers to work at heights and endure long waits, avoiding the risk of falls and dust hazards associated with manually climbing tanker roofs for sampling, greatly reducing safety risks. On the other hand, it improves sampling quality and reliability, with real-time weighing feedback ensuring that material is actually collected each time, avoiding "empty sampling" caused by pipeline blockage or misjudgment of time.

[0038] Example 2 This embodiment discloses an automatic limestone powder sampling method, which uses the aforementioned automatic limestone powder sampling device for sampling, and includes the following steps: Step 1, Sampling Preparation: After the unloading tanker truck 2 enters the designated unloading area, the industrial image recognition camera 1 captures an image of the unloading tanker truck 2. The controller 3 establishes a task number (including license plate number / time / material type) based on the image captured by the industrial image recognition camera 1. The sampling main pipe pressure transmitter 4 detects the pressure in the sampling main pipe 21 in real time. If the pressure detected by the sampling main pipe pressure transmitter 4 is greater than or equal to the set pressure within a continuous set time, for example, maintaining the pressure detected by the sampling main pipe pressure transmitter 4 at ≥0.18MPa for 10 consecutive minutes (all of the following are absolute pressures), the controller 3 determines that unloading has started (this threshold can effectively filter instantaneous fluctuations and prevent false triggering). Step two, sampling begins. The controller 3 controls the opening of the sampling main pipe inlet valve 5, and then controls the opening of the corresponding branch pipe sampling valve (branch pipe sampling valve 11, branch pipe sampling valve 12, or branch pipe sampling valve 13), so that the limestone powder enters the corresponding sampling bag (sampling bag 14, sampling bag 15, or sampling bag 16). Specifically, the controller 3 can control the corresponding branch pipe sampling valve to open for 3 seconds every 5 minutes (to ensure that the sampling time is representative and random). The controller 3 reads the weight change measured by the corresponding weighing sensor (weighing sensor 17, weighing sensor 18, or weighing sensor 19) in real time. If the controller 3 reads that the weight detected by the weighing sensor has not changed within a set time, it determines that the sampling has failed. For example, if the weighing sensor does not detect an increase in weight within 10 seconds, it determines that the sampling has failed. Meanwhile, the sampling header pressure transmitter 4 monitors whether the pressure in the sampling header 21 remains within the unloading pressure range within a set time. If the pressure exceeds the reasonable unloading pressure range (e.g., a sudden drop of <0.18MPa or a sudden rise of >0.22MPa), the controller 3 issues a "pressure abnormality" alarm. Step 3, sampling terminates. The sampling main pipe pressure transmitter 4 detects that the pressure of the sampling main pipe 21 is less than the set value within a set time. For example, if the pressure monitored by the sampling main pipe pressure transmitter 4 is ≤0.1Mpa for 10 consecutive minutes, the powder unloading is determined to be over. Alternatively, when the controller 3 detects that the weight weighed by the weighing sensor reaches the set value, the sampling is determined to be over, and the controller 3 controls the branch pipe sampling valve to close. Step 4: Automatic backflushing. After the controller 3 confirms the completion of powder unloading or sampling, it controls the opening of the compressed air inlet valve 7 of the sampling main pipe and the corresponding compressed air inlet valve of the sampling branch pipe, and performs backflushing for a set time (e.g., 5 seconds) (high-pressure gas can instantly push out the dust in the pipeline). During the backflushing process, the sampling main pipe pressure transmitter 4 should monitor that the pressure in the pipe rises to the same level as the compressed air source. If there is no such change, an alarm "Purge Failure" will be triggered. After the backflushing time is set, close the compressed air valve of the sampling branch pipe and the compressed air valve of the sampling main pipe 21 in sequence, and finally close the inlet valve 5 of the sampling main pipe to complete one pipeline cleaning. Step 5: Sample identification and data storage. Controller 3 records the end timestamp of this sampling, the final weight of the sampling bag, the license plate number and the branch tube number, and generates an electronic tag (which can be printed / scanned with a QR code) based on the above information.

[0039] The present invention makes the following improvements over the existing technology: 1. Real-time sampling and judgment mechanism based on weighing feedback: A weighing sensor is installed below the sampling bag to monitor changes in the bag's weight in real time, automatically determining whether sampling was successful and triggering automatic alarms and precise termination of sampling. This is an innovative feature never before achieved in existing technology, completely eliminating the phenomenon of "empty sampling" or "false sampling."

[0040] 2. Industrial Image Recognition (License Plate Recognition and Sample Binding): The industrial image recognition camera 1 automatically captures license plates and generates timestamps. The controller 3 (PLC or DCS) automatically binds the license plate information to the sample label, realizing one bag and one label per vehicle, ensuring the traceability of information throughout the sampling process.

[0041] 3. Pressure feedback (sampling trigger and termination): The pressure change of the sampling header 21 is monitored by the sampling header pressure transmitter 4, and the sampling start and end are dynamically triggered, which effectively avoids false triggering caused by pressure fluctuations and improves system stability.

[0042] 4. Sampling execution (multi-point, multiple-time hybrid sampling mechanism): By employing multiple sampling branches and a timed short-term valve opening mechanism, combined with pressure and weighing dual feedback, multi-point decentralized mixed sampling is achieved, enhancing the representativeness of the samples.

[0043] 5. Self-cleaning (automatic backflushing and residual powder removal): After each sampling is completed, the compressed air inlet valve 7 of the sampling main pipe and the compressed air inlet valve of the sampling branch pipe are automatically opened to achieve backflushing, thoroughly remove residual powder, avoid cross-contamination and improve the reliability of equipment operation.

[0044] 6. Automatic control and data archiving system: The controller 3 enables unified scheduling and control of the above structure, and automatically generates electronic tags and stores data throughout the sampling process, facilitating subsequent traceability and quality management.

[0045] This invention achieves full automation of the sampling process, effectively solving multiple problems associated with traditional manual sampling. On one hand, replacing manual operation significantly improves safety and efficiency, further protecting worker safety by replacing on-site manual work while improving work efficiency and sampling quality. Automation also saves manpower and resources, increasing operational efficiency and reducing costs. This invention eliminates the need for workers to work at heights and endure long waits, avoiding the risk of falls and dust hazards associated with manually climbing tanker roofs for sampling, greatly reducing safety risks. On the other hand, it improves sampling quality and reliability. Real-time weighing feedback ensures that material is collected with each sample, avoiding "empty sampling" caused by pipeline blockage or misjudgment of time. Furthermore, the automatic backflushing process keeps pipelines clean, reducing cross-contamination and maintenance work, thereby further improving equipment operational reliability. Finally, license plate recognition and electronic tagging functions solve the problem of sample batch traceability, ensuring full traceability from sampling to testing. In summary, this invention achieves significant improvements in safety, sampling accuracy, operational reliability, and management efficiency, thus successfully replacing manual sampling.

[0046] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system or element referred to 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.

[0047] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic limestone powder sampling device, characterized in that, The system includes a controller (3), a powder unloading pipe (20), a sampling main pipe (21), sampling branch pipes, and an industrial image recognition camera (1) for image recognition of the powder unloading tanker (2). One end of the sampling main pipe is connected to one end of a connecting pipe (27) through a sampling main pipe inlet valve (5), and the other end of the connecting pipe (27) is connected to the side wall of the powder unloading pipe (20). A sampling main pipe pressure transmitter (4) is provided on the connecting pipe (27). One end of the sampling branch pipe is connected to the side wall of the sampling main pipe (21), and a branch pipe sampling valve is provided on the sampling branch pipe. The other end of the sampling branch pipe is... A sampling bag is connected, and a weighing sensor for weighing the sampling bag is provided vertically below the sampling bag; the controller (3) is electrically connected to the industrial image recognition camera (1) to receive image information, the controller (3) is electrically connected to the sampling main pipe pressure transmitter (4) to receive the pressure information in the sampling main pipe (21) collected by the sampling main pipe pressure transmitter (4), and the controller (3) is electrically connected to the sampling main pipe inlet valve (5) and the branch pipe sampling valve to control the opening and closing of the sampling main pipe inlet valve (5) and the branch pipe sampling valve respectively.

2. The automatic limestone powder sampling device according to claim 1, characterized in that, The sampling main tube (21) is connected to a main tube backflushing cleaning mechanism for backflushing and cleaning the sampling main tube (21).

3. The automatic limestone powder sampling device according to claim 2, characterized in that, The backflush cleaning mechanism of the main pipe includes a backflush cleaning pipe (25), one end of which is connected to the sampling main pipe (21), and the other end of which is connected to a high-pressure air source. The backflush cleaning pipe (25) is provided with a sampling main pipe compressed air inlet valve (7).

4. The automatic limestone powder sampling device according to claim 1, characterized in that, The sampling branch pipe is connected to a branch pipe backflushing cleaning mechanism for backflushing and cleaning the sampling branch pipe.

5. The automatic limestone powder sampling device according to claim 4, characterized in that, The backflush cleaning mechanism includes a backflush cleaning branch pipe (26), one end of which is connected to the sampling branch pipe, and the other end of which is connected to a high-pressure air source. The backflush cleaning branch pipe (26) is equipped with a sampling branch pipe compressed air inlet valve.

6. An automatic limestone powder sampling device according to any one of claims 1 to 5, characterized in that, The number of sampling branch pipes is multiple, one end of each sampling branch pipe is connected to the side wall of the sampling main pipe (21), each sampling branch pipe is provided with a branch pipe sampling valve, the other end of each sampling branch pipe is connected to a sampling bag, and each sampling bag is provided with a weighing sensor for weighing the sampling bag vertically below it.

7. An automatic limestone powder sampling method, comprising sampling using the automatic limestone powder sampling device according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1, Sampling preparation: After the unloading tanker (2) enters the designated unloading area, the industrial image recognition camera (1) captures the image of the unloading tanker (2), and the controller (3) establishes a task number through the image captured by the industrial image recognition camera (1). Step 2, sampling begins. The controller (3) controls the inlet valve (5) of the sampling main pipe to open, and then controls the branch pipe sampling valve to open, so that limestone powder enters the sampling bag. The controller (3) reads the weight weighed by the designated weighing sensor in real time. Step 3, sampling terminates. When the controller (3) detects that the weight measured by the weighing sensor has reached the set value, the controller (3) controls the branch pipe sampling valve to close. Step 4, Sample identification and data storage: The controller (3) records the end timestamp of this sampling, the final weight of the sampling bag, the license plate number and the branch pipe number, and generates an electronic tag with the above information.

8. The automatic limestone powder sampling method according to claim 7, characterized in that, In step one, while the industrial image recognition camera (1) captures the image of the powder unloading tanker (2), the sampling main pipe pressure transmitter (4) detects the pressure in the sampling main pipe (21) in real time. If the pressure detected by the sampling main pipe pressure transmitter (4) is greater than or equal to the set pressure within a continuous set time, then step two begins.

9. The automatic limestone powder sampling method according to claim 7, characterized in that, In step two, if the controller (3) reads that the weight detected by the weighing sensor has not changed within a set time, it determines that the sampling has failed.

10. The automatic limestone powder sampling method according to claim 7, characterized in that, In step three, if the sampling main pipe pressure transmitter (4) detects that the pressure of the sampling main pipe (21) is less than the set value within a set time, it determines that the powder unloading is completed, and the controller (3) controls the branch pipe sampling valve to close.

Images