A discharging control method and system applied to steel silos

Abstract

The present invention discloses a discharging control method and system applied to a steel silo, comprising: determining a discharging point or a discharging area corresponding to the highest value of the material level height and the lowest value of the material level height; discharging the discharging point or the discharging area corresponding to the highest value of the material level height until the material level height corresponding to the discharging point or the discharging area is lower than the lowest value of the material level height; re-determining the discharging point or the discharging area corresponding to the highest value of the material level height until all the discharging points or discharging areas except the discharging point or discharging area corresponding to the lowest value of the material level height have completed one discharging process. The present invention preferentially discharges the highest part of the material layer, and the material level signal participates in the discharging process throughout. Taking a height difference of 1 m as the stop point of one cycle, after running for a period of time, the height difference between the highest part and the lowest part of the entire material layer can be maintained at a set value, which can effectively reduce the eccentric load and prevent the silo body from tilting and collapsing.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic discharging, and particularly relates to a discharging control method and system applied to a steel silo. Background Art

[0002] The statements in this part only provide background technical information related to the present invention, and do not necessarily constitute prior art.

[0003] A steel silo, also known as a steel warehouse, refers to a large-scale steel-made floor-standing tank body, with a steel structure on the upper part and a concrete structure on the lower part, used for storing bulk materials such as cement and fly ash; it is divided into two types: welded silos and rolled sheet silos. The former's cylinder is made of steel plates welded together, and the welding method is butt welding. The latter's cylinder is made of galvanized steel plates rolled.

[0004] The discharging of steel silos is divided into two methods: single-point discharging and multi-point discharging. Single-point discharging means that a discharging point is set at the center of the bottom of the steel silo, and the materials are all discharged from the center. This method mainly relies on fluidizing air and material fluidization, with gravity as an auxiliary. Multi-point discharging, also known as multi-corridor multi-point discharging, means that multiple discharging points are set at the bottom of the steel silo, and several discharging points form a corridor. A single silo can adopt a gravity feeding method with double corridors or multiple corridors.

[0005] Taking a large steel silo with a diameter of 40m as an example, the current discharging control scheme for steel silos is as follows:

[0006] 3 - 5 radar level gauges are evenly arranged on the top of the silo, and the discharging capacity of each discharging point is generally 150t / h.

[0007] For a large multi-point discharging steel silo, during normal discharging, two discharging points symmetric about the center of the steel silo form a group. After one discharging point continuously discharges for 20 - 40 minutes, it automatically switches to the other discharging point and continuously discharges for another 20 - 40 minutes, and then changes to the next group in the order of first clockwise and then from the inside to the outside. Until all discharging points have discharged for 20 - 40 minutes, then start the next cycle.

[0008] For a large single-point discharging steel silo, during normal discharging, the bottom of the steel silo is divided into different discharging areas. The areas included in two fan-shaped ranges symmetric about the center of the steel silo form a group. After the bottom fluidizing air is turned on in one fan-shaped range and continuously discharges through the central discharging device for 20 - 40 minutes, it automatically switches to the other fan-shaped range and continuously discharges for another 20 - 40 minutes, and then changes to the next group in the clockwise order. Until all areas have discharged for 20 - 40 minutes, then start the next cycle.

[0009] The above normal discharging process is automatically controlled by the program, and the level gauge does not participate in the discharging process. If during the discharging process, the height difference between the highest and lowest levels monitored by each level gauge exceeds 2m and does not decrease within 24h, the automatic discharging will stop and switch to the manual mode. Priority is given to operating several discharging points or several areas within the range of the highest level until the height difference between the highest and lowest levels drops within 1m, and then switch back to the automatic mode.

[0010] The above automatic control process has the following technical problems:

[0011] (1) In the existing technology, it is necessary to wait until the height difference between the highest and lowest levels exceeds 2m and the height difference is maintained for a certain period of time before aborting the automatic discharging and switching to the manual mode. This increases the duration of the eccentric load on the steel silo and increases the risk of the silo body tilting and collapsing.

[0012] (2) In the existing technology, after the automatic discharging method is aborted, it switches to the manual mode. If there is an accidental misoperation of the system or a mistake in personnel handover resulting in the failure to eliminate the level height difference in time, it will instead cause the level height difference to increase, increasing the risk of the silo body tilting and collapsing.

[0013] (3) If the situation where the height difference between the high and low levels exceeds 2m frequently occurs, it requires on-site operators to continuously intervene in manual discharging, resulting in a large workload for on-site operators. Summary of the Invention

[0014] To solve the above problems, the present invention proposes a discharging control method and system applied to a steel silo, which eliminates the level height difference during the discharging process, can effectively reduce the eccentric load and prevent the silo body from tilting and collapsing.

[0015] In some embodiments, the following technical solutions are adopted:

[0016] A discharging control method applied to a steel silo, comprising:

[0017] (1) Obtain the level heights of each discharging point or discharging area, determine the discharging point or discharging area corresponding to the highest level height value, and the discharging point or discharging area corresponding to the lowest level height value; the lowest level height value is not greater than the set value;

[0018] (2) Discharge the discharging point or discharging area corresponding to the highest level height value until the level height corresponding to the discharging point or discharging area is lower than the lowest level height value;

[0019] (3) Re-determine the discharging point or discharging area corresponding to the highest level height value, and repeat step (2); until all discharging points or discharging areas except the discharging point or discharging area corresponding to the lowest level height value have completed one discharging;

[0020] (4) Unload the material at the unloading point or unloading area corresponding to the lowest material level height, and the unloading is completed.

[0021] In some other embodiments, the following technical solution is adopted:

[0022] A method for controlling the unloading of a steel silo, comprising:

[0023] (1) Obtain the material level height of each unloading point or unloading area, determine the unloading point or unloading area corresponding to the highest material level height, and the unloading point or unloading area corresponding to the lowest material level height;

[0024] (2) Unload the material at the unloading point or unloading area corresponding to the highest material level height until the material level height corresponding to the unloading point or unloading area is lower than the difference between the lowest material level height and the set value;

[0025] (3) Re-determine the unloading point or unloading area corresponding to the highest material level height, and repeat step (2); until all unloading points or unloading areas except the unloading point or unloading area corresponding to the lowest material level height have completed one unloading;

[0026] (4) If the current lowest material level height is still greater than the set value; return to step (1), otherwise, unload the material at the unloading point or unloading area corresponding to the lowest material level height, and the unloading is completed.

[0027] As an optional implementation manner, by arranging a continuous material level gauge directly above each unloading point or unloading area, the material level height of each unloading point or unloading area is obtained.

[0028] As an optional implementation manner, the value range of the set value is: 0.5 m - 2 m.

[0029] As an optional implementation manner, the set value is 1 m.

[0030] As an optional implementation manner, when the steel silo is for single-point unloading, each unloading area is unloaded separately; when the steel silo is for multi-point unloading, each unloading point is unloaded separately.

[0031] In some other embodiments, the following technical solution is adopted:

[0032] A control system for unloading a steel silo, comprising:

[0033] A first material level height acquisition module, configured to obtain the material level height of each unloading point or unloading area, determine the unloading point or unloading area corresponding to the highest material level height, and the unloading point or unloading area corresponding to the lowest material level height; the lowest material level height is not greater than the set value;

[0034] The first discharge control module is used to discharge the discharge point or discharge area corresponding to the maximum value of the material level height until the material level height corresponding to the discharge point or discharge area is lower than the minimum value of the material level height; re-determine the discharge point or discharge area corresponding to the maximum value of the material level height, and repeat the above process; until all discharge points or discharge areas except the discharge point or discharge area corresponding to the minimum value of the material level height have completed one discharge; discharge the discharge point or discharge area corresponding to the minimum value of the material level height, and the discharge ends.

[0035] In some other embodiments, the following technical solutions are adopted:

[0036] A discharge control system applied to a steel silo, comprising:

[0037] The second material level height acquisition module acquires the material level height of each discharge point or discharge area, determines the discharge point or discharge area corresponding to the maximum value of the material level height, and the discharge point or discharge area corresponding to the minimum value of the material level height;

[0038] The second discharge control module discharges the discharge point or discharge area corresponding to the maximum value of the material level height until the material level height corresponding to the discharge point or discharge area is lower than the difference between the minimum value of the material level height and the set value; re-determine the discharge point or discharge area corresponding to the maximum value of the material level height, and repeat this process; until all discharge points or discharge areas except the discharge point or discharge area corresponding to the minimum value of the material level height have completed one discharge;

[0039] If the current minimum value of the material level height is still greater than the set value, return to re-determine the maximum value and the minimum value of the material level height, and perform discharge according to the above process; otherwise, discharge the discharge point or discharge area corresponding to the minimum value of the material level height, and the discharge ends.

[0040] In some other embodiments, the following technical solutions are adopted:

[0041] A terminal device, which includes a processor and a memory. The processor is used to implement each instruction; the memory is used to store multiple instructions, and the instructions are suitable for being loaded and executed by the processor to perform the above-mentioned discharge control method applied to a steel silo.

[0042] In some other embodiments, the following technical solutions are adopted:

[0043] A computer-readable storage medium, in which multiple instructions are stored, and the instructions are suitable for being loaded and executed by the processor of the terminal device to perform the above-mentioned discharge control method applied to a steel silo.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] (1) The present invention preferentially discharges materials from the highest point of the material layer, and the material level signal participates in the entire discharging process. Taking a height difference of 1 m as the stop point for each cycle, after running for a period of time, the height difference between the highest and lowest points of the entire material layer can be maintained at a set value, effectively reducing eccentric loads and preventing the silo body from tilting and collapsing.

[0046] (2) The present invention can simultaneously eliminate the height difference of the material level during the discharging process. The process of eliminating the height difference is synchronized with the discharging process, and the entire process runs automatically, reducing the workload of on-site operators, effectively reducing the negative impacts caused by human misoperations, and improving the safety of the system.

[0047] Other features and advantages of the additional aspects of the present invention will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of this aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of a discharging control method applied to a multi-point discharging steel silo in an embodiment of the present invention;

[0049] Figure 2 It is a schematic diagram of a discharging control method applied to a single-point discharging steel silo in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Embodiment 1

[0053] In one or more embodiments, a discharging control method applied to a multi-point discharging steel silo is disclosed. Combining Figure 1 , the specific process is as follows:

[0054] Above the center of each discharging point of the steel silo, a continuous level gauge is provided to obtain the level height of each discharging point.

[0055] (1) Before the unloading starts, obtain the material level heights of each unloading point, determine the unloading point corresponding to the highest material level height, and the unloading point corresponding to the lowest material level height;

[0056] (2) Determine whether the lowest material level height is less than the set value. In this embodiment, the value range of the set value is 0.5m - 2m. Within this range, the smaller the value, the safer the operation, but the more frequent the start and stop of the unloading equipment; if the value is less than 0.5m, the material level judgment is likely to be inaccurate; if the value is greater than 2m, the gap between the high and low material levels is too large and the operation is unsafe. Considering both safety and the start and stop times of the equipment comprehensively in this embodiment, the set value is selected as 1m.

[0057] (2-1) If it is less, unload the material at the unloading point corresponding to the highest material level height until the material level height corresponding to this unloading point is lower than the lowest material level height, and this place is emptied. Then re-determine the unloading point corresponding to the highest material level height and unload the material at the unloading point corresponding to the highest material level height; repeat this process until all unloading points except the unloading point corresponding to the lowest material level height have completed one unloading, and finally unload the material at the unloading point corresponding to the lowest material level height, and all unloading points are emptied.

[0058] (2-2) If it is not less, unload the material at the unloading point corresponding to the highest material level height until the material level height corresponding to this unloading point is lower than the difference between the lowest material level height and the set value, and this unloading point stops unloading; then re-determine the unloading point corresponding to the highest material level height and unload the material at the unloading point corresponding to the highest material level height; repeat this process until all unloading points except the unloading point corresponding to the lowest material level height have completed one unloading.

[0059] (2-3) Re-determine the lowest material level height and the highest material level height; if the lowest material level height is less than the set value, after all unloading points have completed one unloading according to the process of (2-1), all unloading points are emptied. If the lowest material level height is still not less than the set value, after all unloading points have completed one unloading according to the process of (2-2), re-determine the lowest material level height and the highest material level height again, and repeat the process of (2-3) until all unloading points are emptied and the unloading terminates.

[0060] Embodiment Two

[0061] In one or more embodiments, a unloading control method applied to a single-point unloading steel silo is disclosed, combined with Figure 2 , specifically including the following process:

[0062] Above the positive side of each unloading area of the steel silo, a continuous level gauge is provided to obtain the material level height of each unloading area.

[0063] (1) Before the unloading starts, obtain the material level heights of each unloading area, determine the unloading area corresponding to the highest material level height, and the unloading area corresponding to the lowest material level height;

[0064] (2) Determine whether the lowest material level height is less than the set value. In this embodiment, the value range of the set value is 0.5m - 2m. Within this range, the smaller the value, the safer the operation, but the more frequent the start and stop of the unloading equipment; if the value is less than 0.5m, the material level judgment is likely to be inaccurate; if the value is greater than 2m, the gap between the high and low material levels is too large and the operation is unsafe. Considering both safety and the start and stop times of the equipment comprehensively in this embodiment, the set value is selected as 1m.

[0065] (2-1) If it is less, unload the unloading area corresponding to the highest material level height until the material level height corresponding to this unloading area is lower than the lowest material level height, and this area is emptied. Then re-determine the unloading area corresponding to the highest material level height and unload the unloading area corresponding to the highest material level height; repeat this process until all unloading areas except the unloading area corresponding to the lowest material level height have completed one unloading, and finally unload the unloading area corresponding to the lowest material level height until all unloading areas are emptied.

[0066] (2-2) If it is not less, unload the unloading area corresponding to the highest material level height until the material level height corresponding to this unloading area is lower than the difference between the lowest material level height and the set value, and this unloading area stops unloading; then re-determine the unloading area corresponding to the highest material level height and unload the unloading area corresponding to the highest material level height; repeat this process until all unloading areas except the unloading area corresponding to the lowest material level height have completed one unloading.

[0067] (2-3) Re-determine the lowest material level height and the highest material level height; if the lowest material level height is less than the set value, after all unloading areas have completed one unloading according to the process of (2-1), all unloading areas are emptied. If the lowest material level height is still not less than the set value, after all unloading areas have completed one unloading according to the process of (2-2), re-determine the lowest material level height and the highest material level height again, and repeat the process of (2-3) until all unloading areas are emptied and the unloading terminates.

[0068] Embodiment Three

[0069] In one or more embodiments, a unloading control system applied to a single-point unloading steel silo is disclosed, including:

[0070] The material level height acquisition module is used to acquire the material level height of each discharging point or discharging area before the start of discharging, determine the discharging point or discharging area corresponding to the highest material level height value, and the discharging point or discharging area corresponding to the lowest material level height value;

[0071] In this embodiment, by setting a continuous material level gauge directly above each discharging point or discharging area, the material level height of each discharging point or discharging area is acquired.

[0072] The discharging control module is used to discharge the discharging point or discharging area corresponding to the highest material level height value until the material level height corresponding to the discharging point or discharging area is lower than the lowest material level height value; re-determine the discharging point or discharging area corresponding to the highest material level height value, and repeat the above process; until all discharging points or discharging areas have completed one discharging.

[0073] The specific implementation manners of the above modules have been described in detail in Embodiment 1, and will not be elaborated here.

[0074] Although the specific implementation manners of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made without creative efforts by those skilled in the art are still within the protection scope of the present invention.

Claims

1. A discharge control method applied to a steel silo, characterized in that, Including: (1) Obtain the material level heights of each discharging point or discharging area, determine the discharging point or discharging area corresponding to the highest material level height, and the discharging point or discharging area corresponding to the lowest material level height; the lowest material level height is not greater than a set value; wherein, by arranging continuous level gauges directly above each discharging point or discharging area, obtain the material level heights of each discharging point or discharging area; the value range of the set value is: 0.5m - 2m; (2) Discharge the discharging point or discharging area corresponding to the highest material level height until the material level height corresponding to the discharging point or discharging area is lower than the lowest material level height; (3) Re-determine the discharging point or discharging area corresponding to the highest material level height, and repeat step (2); until all discharging points or discharging areas except the discharging point or discharging area corresponding to the lowest material level height have completed one discharging; (4) Discharge the discharging point or discharging area corresponding to the lowest material level height, and the discharging ends; When the steel silo is for single-point discharging, discharge each discharging area separately; when the steel silo is for multi-point discharging, discharge each discharging point separately.

2. The discharging control method for a steel silo according to claim 1, wherein The set value is 1m.

3. A discharging control system applied to a steel silo, characterized in that, (1) Obtain the material level heights of each discharging point or discharging area, determine the discharging point or discharging area corresponding to the highest material level height, and the discharging point or discharging area corresponding to the lowest material level height; the lowest material level height is not greater than a set value; wherein, by arranging continuous level gauges directly above each discharging point or discharging area, obtain the material level heights of each discharging point or discharging area; the value range of the set value is: 0.5m - 2m; A first material level height obtaining module, configured to obtain the material level heights of each discharging point or discharging area, determine the discharging point or discharging area corresponding to the highest material level height, and the discharging point or discharging area corresponding to the lowest material level height; the lowest material level height is not greater than a set value; wherein, by arranging continuous level gauges directly above each discharging point or discharging area, obtain the material level heights of each discharging point or discharging area; the value range of the set value is: 0.5m - 2m; A first discharging control module, configured to discharge the discharging point or discharging area corresponding to the highest material level height until the material level height corresponding to the discharging point or discharging area is lower than the lowest material level height; re-determine the discharging point or discharging area corresponding to the highest material level height, and repeat the above process; until all discharging points or discharging areas except the discharging point or discharging area corresponding to the lowest material level height have completed one discharging; discharge the discharging point or discharging area corresponding to the lowest material level height, and the discharging ends; When the steel silo is for single-point discharging, discharge each discharging area separately; when the steel silo is for multi-point discharging, discharge each discharging point separately.

4. A terminal device, comprising a processor and a memory, the processor being configured to implement each instruction; the memory being configured to store a plurality of instructions, characterized in that, The instruction is suitable for being loaded and executed by a processor to perform the discharging control method for a steel silo according to any one of claims 1 - 2.

5. A computer-readable storage medium storing a plurality of instructions, characterized in that, The instruction is suitable for being loaded and executed by a processor of a terminal device to perform the discharging control method for a steel silo according to any one of claims 1 - 2.

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