Grain flexible warehousing control system and method

Abstract

According to the flexible grain warehousing control system and method, a driving platform drives a grain distributor to ascend and descend on a central stand column, and the grain distributor can be aligned with discharging openings in different height layers in the central stand column; the lifting position of the grain distributor, the grain pile height at the grain falling point of the middle-opening grain distribution groove and the grain pile height at the grain falling point of the far-opening grain distribution groove are detected, and the driving platform is controlled to drive the grain distributor to conduct lifting adjustment according to the detection result; grain is fed layer by layer from bottom to top and is uniformly fed from the periphery of the silo to the center of the silo, and due to the adoption of the layer-by-layer feeding mode from bottom to top, the falling height of the grain in the silo is reduced, so that the grain breakage rate and the grain loss are reduced, and the grain storage efficiency is improved. And each layer is uniformly fed from the periphery of the silo to the center of the silo, so that the uniform feeding of each layer is realized, the grain piles in the silo are uniformly distributed, the silo flattening workload is greatly reduced, and the flexible warehousing of the grains is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of grain storage, and in particular to a flexible grain storage control system and method. Background Art

[0002] The existing method of feeding grain into the silo is to use a conveying machine to feed from the top of the silo. Since the silo has only one fixed top entrance and is basically located in the center of the silo, the material is scattered freely from top to bottom. Due to the different sizes, weights, shapes, etc. of grain particles and the presence of impurities, the automatic classification of grain in the silo is serious, resulting in local concentration of moisture and impurities, which makes the grain very easy to mold and infest. Therefore, in order to solve the problem of automatic classification of grain, a grain distributor is usually fixedly installed at the top feed port of the silo, wherein the grain distributor includes a plurality of grain distribution trough groups evenly distributed along the circumference, each grain distribution trough group includes a far-end grain distribution trough and a middle-end grain distribution trough arranged in parallel up and down, the grain drop point of the far-end grain distribution trough is located in the near peripheral area of ​​the silo, and the grain drop point of the middle-end grain distribution trough is located in the near middle area of ​​the silo. After entering from the feed port, the grain drops through multiple groups of far-end grain distribution troughs and middle-end grain distribution troughs, which solves the problem of automatic classification of grain to a certain extent. However, since the grain distributor is fixedly installed at the feed inlet on the silo top, grain enters the silo from the high top, and the drop height is too high, resulting in a high grain breakage rate and large grain loss. In addition, the grain pile in the silo is unevenly tilted, requiring manual leveling, and the leveling operation is large. Summary of the invention

[0003] The present invention provides a flexible grain warehousing control system and method, which can reduce the grain breakage rate and grain loss when entering the warehousing, and can also make the grain pile in the silo evenly distributed, greatly reducing the amount of warehouse closing operations, thereby realizing flexible grain warehousing.

[0004] According to one aspect of the present invention, a flexible grain silo control system is provided, including a driving platform, a grain distributor, a distance measuring element, a middle-mouth material level detection element, a far-mouth material level detection element and a controller. The driving platform is fixedly installed on the top of the silo and is connected to the grain distributor for driving the grain distributor to lift the grain distributor. The distance measuring element is installed on the driving platform for detecting the lifting position of the grain distributor. A first mounting plate and a second mounting plate extending outward are installed on the driving platform, and the first mounting plate and the second mounting plate are staggered in the circumferential direction. The middle-mouth material level detection element is installed on the first mounting plate for detecting the lifting position of the grain distributor. The height of the grain pile at the grain landing point of the middle grain distribution trough of the grain distributor, the far-end material level detection element is installed on the second mounting plate, and is used to detect the height of the grain pile at the grain landing point of the far-end grain distribution trough of the grain distributor, and the controller is electrically connected with the driving platform, the distance measuring element, the middle-end material level detection element and the far-end material level detection element, and is used to issue a control instruction to the driving platform according to the detection results of the distance measuring element, the middle-end material level detection element and the far-end material level detection element, so as to drive the grain distributor to adjust the lifting position, so that the grain can be fed into the silo layer by layer from bottom to top and each layer of feeding is evenly fed from the outside of the silo to the center of the silo.

[0005] Furthermore, in the process of feeding layer by layer from bottom to top, the controller first controls the driving platform to drive the grain distributor to descend, and detects the descending position of the grain distributor through the ranging element to determine whether the grain distributor is aligned with the position of the discharge port of the lowest layer on the central column. After completing the uniform feeding of the lowest layer, the controller then controls the driving platform to drive the grain distributor to rise until it is aligned with the discharge port of the upper layer, and the above process is repeated continuously until the grain distributor rises to the position of the discharge port of the highest layer.

[0006] Furthermore, in the feeding process of each layer, the controller first controls the driving platform to drive the grain distributor to rise and fall, so that the far-end grain distribution trough is aligned with the position of the discharge port of this layer, and determines whether the height of the grain pile detected by the far-end material level detection element reaches a preset height value. If the preset height value is reached, the controller controls the driving platform to drive the grain distributor to move upward, so that the middle-end grain distribution trough is aligned with the position of the discharge port of this layer, and determines whether the height of the grain pile detected by the middle-end material level detection element reaches the preset height value. If the preset height value is reached, the controller controls the driving platform to drive the grain distributor to move upward, so that the far-end grain distribution trough is aligned with the discharge port of the upper layer, and in the process of the grain distributor moving upward, grain falls from the discharge port of this layer.

[0007] Furthermore, when the ranging element detects that the lifting position of the grain distributor is aligned with the position of the highest discharge port, and both the middle-mouth material level detection element and the far-mouth material level detection element detect that the grain pile height reaches a preset height value, the controller determines that the silo is full and controls the feeding to be stopped.

[0008] Furthermore, the gate at each discharge port on the central column is driven by a double-stroke driving element, a first material detection element is arranged above the highest discharge port on the central column, and a second material detection element is arranged below the highest discharge port, the first material detection element and the second material detection element are both electrically connected to the controller, when the second material detection element does not detect material, the controller controls the double-stroke driving element to retract to close the gate, when the second material detection element detects material and the first material detection element does not detect material, the controller controls the double-stroke driving element to extend to the first stroke to drive the gate to partially open, and when the first material detection element detects material, the controller controls the double-stroke driving element to extend to the second stroke to drive the gate to fully open.

[0009] Furthermore, an air jet is provided at each discharge port on the central column, and the controller is also used to control the air jet to spray air when the gate of each discharge port is opened, so as to destroy the grain arch at the discharge port.

[0010] Furthermore, during the lifting and lowering of the grain distributor, the controller is also used to convert the lower edge height values ​​of the middle grain distribution trough and the far grain distribution trough according to the detection results of the ranging element, and control the driving platform to adjust the lifting speed of the grain distributor according to the converted lower edge height values ​​to ensure that the middle grain distribution trough or the far grain distribution trough is aligned with the discharge port.

[0011] Further, during the descent of the grain distributor, if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is greater than or equal to the first preset height value, the controller controls the driving platform to drive the grain distributor to move downward quickly; if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is less than the first preset height value, the controller controls the driving platform to reduce the downward speed of the grain distributor; if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is greater than the second preset height value, the controller controls the driving platform to further reduce the downward speed of the grain distributor; if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is greater than or equal to the third preset height value and less than or equal to the second preset height value, the controller controls the driving platform to stop driving the grain distributor to rise and fall;

[0012] During the rising process of the grain distributor, if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is less than the fourth preset height value, the controller controls the driving platform to drive the grain distributor to move upward quickly; if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is greater than or equal to the fourth preset height value, the controller controls the driving platform to reduce the upward speed of the grain distributor; if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is less than the third preset height value, the controller controls the driving platform to further reduce the upward speed of the grain distributor; if the height value of the lower edge of the middle grain distribution trough or the far grain distribution trough is greater than or equal to the third preset height value and less than or equal to the second preset height value, the controller controls the driving platform to stop driving the grain distributor to rise and fall.

[0013] Furthermore, a travel switch is provided at the bottom of the driving platform, and the travel switch is electrically connected to the controller. The controller is also used to issue an alarm reminder and / or control the driving platform to drive the grain distributor to descend when the grain distributor rises and triggers the travel switch.

[0014] In addition, the present invention also provides a method for controlling grains in a flexible warehouse, which adopts the above-mentioned flexible warehouse control system for grains, and includes the following contents:

[0015] Detect the lifting position of the grain distributor and determine whether the grain distributor is aligned with the discharge port of the target layer;

[0016] When the grain distributor is aligned with the discharge port of the target layer, the grain pile heights at the grain drop points of the middle grain distribution trough and the far grain distribution trough on the grain distributor are detected, and the grain distributor is controlled to rise and fall according to the detection results of the two grain pile heights, so that when the grain enters the silo at the target layer, it is evenly fed from the periphery of the silo to the center of the silo;

[0017] The grain distributor is controlled to rise and align with the discharge port of the upper layer, and then the above process is repeated, so that the grain is fed into the warehouse layer by layer from bottom to top.

[0018] The present invention has the following beneficial effects:

[0019] The flexible grain storage control system of the present invention drives the grain distributor to rise and fall on the central column through a driving platform, and can be aligned with the discharge ports of different height layers on the central column, and detects the lifting position of the grain distributor through a distance measuring element, detects the height of the grain pile at the grain dropping point of the central grain distribution trough through a middle-mouth material level detection element, and detects the height of the grain pile at the grain dropping point of the far-mouth grain distribution trough through a far-mouth material level detection element. According to the detection results of the distance measuring element, the middle-mouth material level detection element and the far-mouth material level detection element, the driving platform is controlled to drive the grain distributor to perform lifting and adjustment, so that the grain is fed into the silo layer by layer from bottom to top and each layer is fed evenly from the periphery of the silo to the center of the silo. Due to the method of feeding layer by layer from bottom to top, the height of the grain entering the silo is reduced, thereby reducing the grain breakage rate and grain loss, and each layer of feeding adopts a method of evenly feeding from the periphery of the silo to the center of the silo, achieving even feeding of each layer, making the grain pile in the silo evenly distributed, greatly reducing the amount of storage closing operations, thereby achieving flexible grain storage.

[0020] In addition, the flexible grain storage control method of the present invention also has the above advantages.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of the main cross-section of the structural layout of the flexible grain storage control system in the silo according to the preferred embodiment of the present application;

[0024] Figure 2 It is a top view schematic diagram of the structural layout of the flexible grain storage control system in the silo according to the preferred embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the network structure of the grain storage local area network of the preferred embodiment of the present application;

[0026] Figure 4 It is a flow chart of a method for controlling the flexible storage of grain according to another embodiment of the present application.

[0027] Description of Reference Numerals

[0028] 1. Driving platform; 2. Grain distributor; 3. Distance measuring element; 4. Middle-end material level detection element; 5. Far-end material level detection element; 6. First mounting plate; 7. Second mounting plate; 8. First material detection element; 9. Second material detection element; 11. Travel switch; 100. Center column; 101. Discharge port; 21. Middle-end grain distribution trough; 22. Far-end grain distribution trough. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Reference Figure 1 and Figure 2 As shown, the preferred embodiment of the present application provides a flexible grain silo control system, which includes a driving platform 1, a grain distributor 2, a distance measuring element 3, a middle material level detection element 4, a far material level detection element 5 and a controller. The driving platform 1 is fixedly mounted on the top of the silo and is drivingly connected to the grain distributor 2 to drive the grain distributor 2 to rise and fall. Among them, the driving platform 1 is provided with four ring chain hoists, a pneumatic motor and a reducer, and the four hoists are synchronously driven up and down by a universal coupling. The four hoists are all connected to the grain distributor 2, and the connection points on the grain distributor 2 are evenly distributed along the circumference to ensure that the grain distributor 2 rises and falls smoothly. Of course, in other embodiments of the present invention, the driving platform 1 can also be connected to the grain distributor 2 by other linear drive mechanisms, such as a gear rack drive mechanism, a sprocket chain drive mechanism, etc., which are not specifically limited here. The distance measuring element 3 is installed on the driving platform 1 and is used to detect the lifting position of the grain distributor 2. The distance measuring element 3 can be an ultrasonic distance measuring sensor, a rope distance measuring sensor or a laser distance measuring sensor, and preferably a rope distance measuring sensor. Specifically, the distance measuring element 3 is installed at the lower edge of the driving platform 1, and can detect the distance value between the lower edge of the driving platform 1 and the fixed point of the rope on the grain distributor 2 as Hp1. When the grain distributor 2 is at the lowest point, the distance value at this time is calibrated as Hp1. max When the grain distributor 2 is at the highest point, the distance value at this time is calibrated as Hp1 min Therefore, the controller can determine the real-time lifting position of the grain distributor 2 through the real-time distance value Hp1 detected by the distance measuring element 3, and can also control the lifting range of the grain distributor 2 according to the real-time distance value Hp1, that is, the real-time distance value Hp1 must be greater than or equal to Hp1 min and less than or equal to Hp1 max , to prevent the grain distributor 2 from exceeding the limit of lifting or lowering.

[0031] The driving platform 1 is provided with a first mounting plate 6 and a second mounting plate 7 extending outwards. The first mounting plate 6 and the second mounting plate 7 have the same mounting height, and the first mounting plate 6 and the second mounting plate 7 are staggered in the circumferential direction. The middle-mouth material level detection element 4 is installed on the first mounting plate 6 to detect the grain pile height at the grain drop point of the middle-mouth grain distribution groove 21 of the grain distributor 2, and the far-mouth material level detection element 5 is installed on the second mounting plate 7 to detect the grain pile height at the grain drop point of the far-mouth grain distribution groove 22 of the grain distributor 2. It can be understood that since the middle-mouth grain distribution groove 21 on the grain distributor 2 is located directly below the far-mouth grain distribution groove 22, in order to ensure that the grain pile heights at the grain drop points of the middle-mouth grain distribution groove 21 and the far-mouth grain distribution groove 22 can be detected at the same time, the first mounting plate 6 and the second mounting plate 7 need to be staggered in the circumferential direction. Among them, the middle-mouth material level detection element 4 and the far-mouth material level detection element 5 are preferably high-frequency radar level meters. Of course, in other embodiments of the present invention, a distance sensor can also be used to detect the grain pile height.

[0032] It can be understood that multiple layers of discharge ports 101 are provided on the central column 100, and each layer includes multiple discharge ports 101 uniformly distributed along the circumferential direction. The number of grain distribution slot groups on the grain distributor 2 is consistent with the number of discharge ports 101 on each layer. When the grain distributor 2 is aligned with the discharge port 101 of a certain layer, the middle grain distribution slot 21 or the distal grain distribution slot 22 in each grain distribution slot group is aligned with a discharge port 101 to achieve uniform distribution, and the number of distal material level detection elements 5 is consistent with the number of distal material distribution slots 22, and the number of middle material level detection elements 4 can be appropriately reduced, preferably consistent with the number of middle material distribution slots 21. Of course, in other embodiments of the present invention, the number of layers of discharge ports 101 on the central column 100 can be set as needed, the number of discharge ports 101 included in each layer can also be set as needed, and the number of grain distribution slot groups, the number of middle material level detection elements 4 and the number of distal material level detection elements 5 on the grain distributor 2 need to be adaptively adjusted.

[0033] In a preferred embodiment of the present invention, five layers of discharge ports 101 are arranged on the central column 100, and each layer includes four discharge ports 101 evenly distributed along the circumferential direction. The grain distributor 2 includes four grain distribution trough groups evenly distributed along the circumferential direction, and each grain distribution trough group includes a middle grain distribution trough 21 and a distal grain distribution trough 22 arranged in an upper and lower manner. The middle grain distribution trough 21 is located directly below the distal grain distribution trough 22. The azimuth layout of the four grain distribution trough groups corresponds one-to-one to the azimuth layout of the four discharge ports 101 on each layer, ensuring that each grain distribution trough group can correspond to one discharge port 101 on each layer to achieve uniform distribution. The number of distal material level detection elements 5 is four, and the number of middle material level detection elements 4 is two. One middle material level detection element 4 is located in the middle of two adjacent middle grain distribution troughs 21, and the two middle material level detection elements 4 are symmetrically arranged. The distance values ​​between the four far-end material level detection elements 5 and the grain pile at the grain drop point of the far-end grain distribution trough 22 are Hy1, Hy2, Hy3 and Hy4 respectively. The distance values ​​between the two middle-end material level detection elements 4 and the grain pile at the grain drop point of the middle-end grain distribution trough 21 are Hz1 and Hz2 respectively. Since the distance values ​​between the middle-end material level detection element 4 and the far-end material level detection element 5 and the silo ground can be measured in advance, they are Hy1 and Hy2 respectively. max 、Hy2 max 、Hy3 max 、Hy4 max , Hz1 max and Hz2 max Therefore, the grain pile height values ​​corresponding to the four remote material level detection elements 5 are (Hy1 max -Hy1), (Hy2 max -Hy2), (Hy3 max -Hy3), (Hy4 max -Hy4), the grain pile height values ​​corresponding to the two middle-mouth material level detection elements 4 are (Hz1 max -Hz1) and (Hz2 max -Hz2). Of course, in other embodiments of the present invention, the installation heights of the four remote material level detection elements 5 can be set to be consistent, and the installation heights of the two middle material level detection elements 4 can be set to be consistent, that is, Hy1 max =Hy2 max =Hy3 max =Hy4 max , Hz1 max =Hz2 max .

[0034] The controller is electrically connected to the driving platform 1, the distance measuring element 3, the middle material level detection element 4 and the far material level detection element 5, and is used to issue a control instruction to the driving platform 1 according to the detection results of the distance measuring element 3, the middle material level detection element 4 and the far material level detection element 5, so as to drive the grain distributor 2 to adjust the lifting position, so that the grain is fed layer by layer from bottom to top and each layer is fed evenly from the periphery of the silo to the center of the silo. The controller can be integrated and installed on the driving platform 1. It can also be set separately, for example, installed at the entrance of the silo. It can be understood that, since at least one layer of discharge ports 101 is provided on the central column 100, the controller can detect the lifting position of the grain distributor 2 through the distance measuring element 3 to determine whether the grain distributor 2 is aligned with the discharge port 101 of the target layer, so that the grain can be evenly distributed through the grain distributor 2. Moreover, when feeding the target layer, the grain distributor 2 can be controlled to perform lifting and lowering fine adjustment according to the grain pile height detection results of the middle-mouth material level detection element 4 and the far-mouth material level detection element 5, so that the grain can be switched between the far-mouth grain distribution trough 22, the middle-mouth grain distribution trough 21 and the discharge port 101, so that the grain is evenly fed from the periphery of the silo to the center of the silo when entering the target layer. After completing the feeding of the target layer, the grain distributor 2 is controlled to rise and align with the discharge port 101 of the upper layer and the above process is repeated, so that the grain is fed into the silo layer by layer from bottom to top. By repeating the above process continuously, the grain can be fed into the silo layer by layer from bottom to top, and each layer is fed evenly from the outside of the silo to the center of the silo, which greatly reduces the height of the grain entering the silo, thereby greatly reducing grain loss. The grain piles in the silo are evenly distributed, and there is basically no need for manual leveling.

[0035] It can be understood that the grain flexible storage control system of this embodiment drives the grain distributor 2 to rise and fall on the central column 100 through the driving platform 1, and can be aligned with the discharge port 101 of different height layers on the central column 100, and detects the lifting position of the grain distributor 2 through the distance measuring element 3, detects the grain pile height at the grain landing point of the central grain distribution trough 21 through the middle-mouth material level detection element 4, and detects the grain pile height at the grain landing point of the far-mouth grain distribution trough 22 through the far-mouth material level detection element 5. The detection result of component 5 controls the driving platform 1 to drive the grain distributor 2 to perform lifting and lowering adjustment, so that the grain is fed into the silo layer by layer from bottom to top and each layer is fed evenly from the outside of the silo to the center of the silo. Since the method of feeding layer by layer from bottom to top is adopted, the height of the grain entering the silo is reduced, thereby reducing the grain breakage rate and grain loss, and each layer of feeding is fed evenly from the outside of the silo to the center of the silo, so that each layer is evenly fed, so that the grain pile in the silo is evenly distributed, which greatly reduces the amount of unwinding operations, thereby realizing flexible grain entry into the silo.

[0036] It can be understood that in the process of feeding from bottom to top layer by layer, the controller first controls the driving platform 1 to drive the grain distributor 2 to descend, and detects the descending position of the grain distributor 2 through the distance measuring element 3 to determine whether the grain distributor 2 is aligned with the position of the lowest discharge port 101 on the central column 100. After completing the uniform feeding of the lowest layer, the controller controls the driving platform 1 to drive the grain distributor 2 to rise to align with the discharge port 101 of the upper layer, and repeats the above process until the grain distributor 2 rises to the position of the discharge port 101 of the highest layer. It can be understood that by adopting the method of feeding from bottom to top layer by layer, the height of the grain entering the warehouse can be reduced, thereby reducing the grain breakage rate and grain loss.

[0037] In addition, during the feeding process of each layer, the controller first controls the driving platform 1 to drive the grain distributor 2 to rise and fall, so that the far-end grain distribution trough 22 is aligned with the position of the discharge port 101 of this layer, and determines whether the height of the grain pile detected by the far-end material level detection element 5 reaches the preset height value. If the preset height value is reached, the controller controls the driving platform 1 to drive the grain distributor 2 to move upward, so that the middle-end grain distribution trough 21 is aligned with the position of the discharge port 101 of this layer, and determines whether the height of the grain pile detected by the middle-end material level detection element 4 reaches the preset height value. If the preset height value is reached, the controller controls the driving platform 1 to drive the grain distributor 2 to move upward, so that the far-end grain distribution trough 22 is aligned with the discharge port 101 of the upper layer, and in the process of the grain distributor 2 moving upward, the grain falls from the discharge port 101 of this layer. It can be understood that in the process of feeding each layer, the grain is fed from the outer far-end grain distribution trough 22, the middle middle-end grain distribution trough 21 and the central discharge port 101 in sequence, so that the grain pile in the silo is evenly distributed, which greatly reduces the amount of unwinding work. It can be understood that the preset height value corresponding to the grain pile height is different when feeding in different layers. As the number of feeding layers increases, the preset height value will also increase accordingly. The specific preset value can be set according to actual needs. In addition, when feeding in the same layer, the preset height value corresponding to the middle-end material level detection element 4 and the preset height value corresponding to the far-end material level detection element 5 can be the same or different. In addition, in other embodiments of the present invention, the method of first feeding in the middle area, then in the outer area, and finally in the center can also be adopted.

[0038] In addition, when the ranging element 3 detects that the lifting position of the grain distributor 2 is aligned with the position of the discharge port 101 on the highest level, and the middle-mouth material level detection element 4 and the far-mouth material level detection element 5 both detect that the height of the grain pile reaches a preset height value, the controller determines that the silo is full and controls the feeding to be stopped, thereby realizing the automatic control of flexible grain entry into the silo.

[0039] Optionally, the gates at each discharge port 101 on the central column 100 are driven by a double-stroke driving element. A first material detection element 8 is provided above the highest discharge port 101 on the central column 100, and a second material detection element 9 is provided below the highest discharge port 101. The first material detection element 8 and the second material detection element 9 are both electrically connected to the controller. When the second material detection element 9 does not detect material, it means that the grain inflow flow is less than the discharge flow, and the grain in the central column 100 is lower than the discharge level, then the controller controls the double-stroke driving element to retract to close the gate, so that the grain accumulates in the central column 100; when the second material detection element 9 detects material and the first material detection element 8 does not detect material, it means that the grain inflow flow is slightly greater than the discharge flow, and the grain in the central column 100 is higher than the discharge level, then the controller controls the double-stroke driving element to extend to the first stroke to drive the gate to partially open, and the central column 100 The accumulated grains begin to fall evenly through the grain distributor 2; and when the first material detection element 8 detects the material, it means that the grain inflow is greater than the discharge flow, and the grain in the central column 100 is higher than the lower material level, then the controller controls the double-stroke drive element to extend to the second stroke to drive the gate to open completely, so that the discharge flow rate increases; the above process is repeated continuously, so that the height of the grain in the central column 100 is kept between the lower material level and the upper material level, ensuring that there is sufficient grain in the central column 100 to meet the balanced distribution requirements of the grain distributor 2 during each layer of distribution, and it can automatically adapt to the changes in the grain inflow. Among them, the double-stroke drive element adopts a cylinder, an oil cylinder or an electric cylinder, preferably a cylinder, and the first material detection element 8 and the second material detection element 9 preferably adopt a rotary level meter. In addition, when the double-stroke drive element extends the first stroke, the gate opening is 3 / 4, so the gate of each discharge port 101 can be switched between three states: fully closed, 3 / 4 open and fully open.

[0040] It can be understood that the present invention detects materials by setting a first material detection element 8 above the discharge port 101 of the highest layer and a second material detection element 9 below the discharge port 101 of the highest layer, and controls the stroke change of the double-stroke driving element according to the material detection result to control the opening of the gate, thereby ensuring that there is sufficient grain in the central column 100 to meet the balanced distribution requirements of the grain distributor 2 when distributing each layer of material, and can automatically adapt to changes in the flow rate of grain into the warehouse.

[0041] In addition, an air jet is provided at each discharge port 101 on the central column 100, and the controller is also used to control the air jet to eject air when the gate of each discharge port 101 is opened, so as to break the grain arch at the discharge port 101. It can be understood that the present invention can prevent grain agglomeration and blockage at the discharge port 101 by providing an air jet at the discharge port 101 and controlling it in linkage with the gate, thereby improving the grain discharge speed.

[0042] It can be understood that in one embodiment of the present invention, the working process of the grain flexible warehousing control system is as follows:

[0043] The real-time lifting position Hp1 of the grain distributor 2 is detected by the distance measuring element 3, and the grain pile height at the grain drop point of the grain distribution trough 22 is detected by the remote material level detection element 5. min , that is, the grain distributor 2 is at the highest point, and the grain pile height detected by the remote material level detection element 5 reaches the preset height value, then the silo is judged to be full and the feeding is stopped; if Hp1=Hp1 min , but the grain pile height detected by the remote material level detection element 5 does not reach the preset height value, then feeding is allowed; if Hp1 min <Hp1<Hp1 max , that is, the grain distributor 2 is located between the lowest point and the highest point, and feeding is allowed; if the height of the grain pile detected by the remote material level detection element 5 is zero, the silo is determined to be empty, and the controller controls the driving platform 1 to drive the grain distributor 2 to descend, and when the remote grain distribution trough 22 is aligned with the lowest layer of the discharge port 101, feeding begins.

[0044] When the silo is in an empty warehouse state, that is, when the height of the grain pile detected by the remote material level detection element 5 is zero, after the remote grain distribution trough 22 is aligned with the lowest layer of the discharge port 101 to start feeding, when the second material detection element 9 does not detect material, it means that the grain inflow rate is less than the discharge flow rate, and the grain level in the center column 100 is lower than the discharge level, then the controller controls the double-stroke drive element to retract, drives the gate to close, and stops discharging grain; when the second material detection element 9 detects material and the first material detection element 8 does not detect material, it means that the grain inflow rate is slightly greater than the discharge flow rate, and the grain level in the center column 100 reaches the discharge level but does not reach the upper level. When the material level is detected, the controller controls the double-stroke driving element to extend to the first stroke to drive the gate to open 3 / 4, and open the air nozzle at the lowest discharge port 101 to destroy the grain arch, delay the stop of blowing, and the grain is evenly distributed through the remote grain distribution trough 22; when the first material detection element 8 detects the material, it means that the grain inflow flow is greater than the discharge flow, and the grain level in the central column 100 reaches the upper material level, then the controller controls the double-stroke driving element to extend to the second stroke to drive the gate to open completely and increase the discharge flow; so that the grain level in the central column 100 is maintained between the lower material level and the upper material level, and can adapt to the changes in the inflow flow.

[0045] When the grain is evenly distributed to the periphery of the silo through the far-mouth grain distribution trough 22, the height of the grain pile at the grain landing point of the far-mouth grain distribution trough 22 is detected by the far-mouth material level detection element 5. If the height of the grain pile increases, it can be determined that the gate is normally opened. When the height of the grain pile exceeds the preset height value, the controller controls the grain distributor 2 to rise, so that the middle-mouth grain distribution trough 21 is aligned with the lowest layer of the discharge port 101, and the grain is evenly distributed to the middle area of ​​the silo through the middle-mouth grain distribution trough 21, and the middle-mouth material level detection element 4 is used to detect the height of the grain pile at the grain landing point of the middle-mouth grain distribution trough 21. At the same time, the opening of the gate is controlled according to the above-mentioned double-stroke drive element control logic.

[0046] When it is detected that the height of the grain pile at the grain dropping point of the middle grain distribution trough 21 reaches a preset height value, the controller controls the grain distributor 2 to continue to rise. During the rising process, the grain drops into the central area of ​​the silo through the lowest discharge port 101 and continues to accumulate. Before the grain blocks the lowest discharge port 101, the grain distributor 2 should rise to the upper discharge port 101 and align the far grain distribution trough 22 with the upper discharge port 101.

[0047] The above process is repeated continuously. When the grain distributor 2 moves to the highest discharge port 101, if the first material detection element 8 detects the material, and the middle material level detection element 4 and the far material level detection element 5 detect that the grain pile height has reached the preset height value, the controller determines that the silo is full of material, and controls the grain distributor 2 to move to the highest point, that is, Hp1 = Hp1 min, and control to stop feeding, wait for the dust in the silo to settle, and then arrange for manual entry to scrape the grain pile flat. In addition, if the silo is not full after the highest level outlet 101 completes feeding, then after the dust in the silo settles, arrange for manual entry to scrape the grain pile flat, and make room for another entry, and then enter the silo for the second time until the silo is full.

[0048] Optionally, during the lifting and lowering of the grain distributor 2, the controller is also used to convert the lower edge height values ​​of the middle grain distribution trough 21 and the distal grain distribution trough 22 according to the detection results of the ranging element 3, and control the driving platform 1 to adjust the lifting and lowering speed of the grain distributor 2 according to the converted lower edge height values ​​to ensure that the middle grain distribution trough 21 or the distal grain distribution trough 22 is aligned with the discharge port 101.

[0049] It can be understood that when the silo is empty, the height Hpd of the lower edge of the driving platform 1 from the ground can be measured by a laser rangefinder. Since the discharge ports 101 on each layer of the central column 100 are equidistantly arranged, the equidistant height is Hc. The distance K from the lower edge of the discharge port 101 on the highest layer (assuming it is the fifth layer) to the lower edge of the driving platform 1 can be measured by a laser rangefinder. 5 , then the distance from the lower edge of the n-th layer discharge port 101 to the lower edge of the driving platform 1 is: K i =K 5 +(5-n)Hc, i=1,2,3,4. Therefore, the distance from the lower edge of each layer of the discharge port 101 on the central column 100 to the bottom of the warehouse can be calculated as: H i =Hpd-K i The grain distributor 2 moves up and down along the outer wall of the central column 100, and the lifting position of the grain distributor 2 can be measured in real time by the distance measuring element 3. The distance measuring element 3 measures the distance value Hp1 from the lower edge of the driving platform 1 to the fixed point of the pull rope on the grain distributor 2, and the size of the notch of the far-end grain distribution groove 22 and the middle-end grain distribution groove 21 (that is, the notch connected to the discharge port 101) is known. Assuming that the vertical distance between the lower edge of the notch of the middle-end material level detection element 4 and the far-end material level detection element 5 to the fixed point of the pull rope is The distances are y and z respectively, then the distance between the lower edge of the slot of the far grain distribution trough 22 and the lower edge of the driving platform 1 is: By0=Hp1+y, the height of the lower edge of the slot of the far grain distribution trough 22 from the bottom ground of the warehouse is: By1=Hpd-(Hp1+y), and the distance between the lower edge of the slot of the middle grain distribution trough 21 and the lower edge of the driving platform 1 is: Bz0=Hp1+z, the height of the lower edge of the slot of the middle grain distribution trough 21 from the bottom ground of the warehouse is: Bz1=Hpd-(Hp1+z). Since Hpd, y and z are fixed values ​​and are known, and Hp1 can be measured in real time by the distance measuring element 3, By1 and Bz1 can be measured in real time. In the process of controlling the lifting of the grain distributor 2, when By1=H iWhen Bz1=H, the far grain distribution trough 22 is aligned with the discharge port 101 of the i-th layer, and the grain is evenly distributed through the far grain distribution trough 22; i When the middle grain distribution groove 21 is aligned with the discharge port 101 of the i-th layer, the grain is evenly distributed through the middle grain distribution groove 21. Therefore, by real-time detection of the lifting position of the grain distributor 2 by the distance measuring element 3, the far grain distribution groove 22 or the middle grain distribution groove 21 of the grain distributor 2 can be controlled to align with the discharge ports 101 of different layers to achieve even distribution.

[0050] In order to ensure that the far grain distribution trough 22 or the middle grain distribution trough 21 can be quickly and accurately aligned with the discharge port 101, the present invention also controls the driving platform 1 to adjust the lifting speed of the grain distributor 2 according to the lower edge height value of the middle grain distribution trough 21 or the far grain distribution trough 22.

[0051] Among them, during the descent of the grain distributor 2, if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is greater than or equal to the first preset height value, the controller controls the driving platform 1 to drive the grain distributor 2 to move downward quickly; if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is less than the first preset height value, the controller controls the driving platform 1 to reduce the downward movement speed of the grain distributor 2; if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is greater than the second preset height value, the controller controls the driving platform 1 to further reduce the downward movement speed of the grain distributor 2; if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is greater than or equal to the third preset height value and less than or equal to the second preset height value, the controller controls the driving platform 1 to stop driving the grain distributor 2 to rise and fall.

[0052] During the rising process of the grain distributor 2, if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is less than the fourth preset height value, the controller controls the driving platform 1 to drive the grain distributor 2 to move up quickly; if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is greater than or equal to the fourth preset height value, the controller controls the driving platform 1 to reduce the upward speed of the grain distributor 2; if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is less than the third preset height value, the controller controls the driving platform 1 to further reduce the upward speed of the grain distributor 2; if the lower edge height value of the middle grain distribution trough 21 or the distal grain distribution trough 22 is greater than or equal to the third preset height value and less than or equal to the second preset height value, the controller controls the driving platform 1 to stop driving the grain distributor 2 to rise and fall.

[0053] Specifically, the height from the ground of the lower edge of each layer of the discharge port 101 can be calculated as H i, set the error value a of the alignment discharge port 101 and the critical value b of the speed switching of the grain distributor 2 during the lifting process, b>a, that is, the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is [H i -a,H i +a], it can be aligned with the discharge port 101. During the rising process of the grain distributor 2, if the lower edge height of the middle grain distribution groove 21 or the far grain distribution groove 22 reaches H i -b, it is necessary to reduce the rising speed of the grain distributor 2. During the descending process of the grain distributor 2, if the lower edge height of the middle grain distribution groove 21 or the far grain distribution groove 22 reaches H i +b, it is necessary to reduce the descending speed of the grain distributor 2.

[0054] For example, during the descent of the grain distributor 2, if the lower edge height of the middle grain distribution groove 21 or the distal grain distribution groove 22 is greater than or equal to the first preset height value H i + b, the controller controls the driving platform 1 to drive the grain distributor 2 to move downward rapidly; if the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is less than the first preset height value H i + b, the controller controls the driving platform 1 to reduce the downward movement speed of the grain distributor 2; if the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is greater than the second preset height value H i +a, the controller controls the driving platform 1 to further reduce the downward movement speed of the grain distributor 2; if the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is greater than or equal to the third preset height value H i -a and is less than or equal to the second preset height value H i +a, the controller controls the driving platform 1 to stop driving the grain distributor 2 to rise and fall, so that the notch of the middle grain distribution groove 21 or the far grain distribution groove 22 is aligned with the discharge port 101 of the i-th layer.

[0055] Similarly, during the rising process of the grain distributor 2, if the lower edge height of the middle grain distribution groove 21 or the distal grain distribution groove 22 is less than the fourth preset height value H i -b, the controller controls the driving platform 1 to drive the grain distributor 2 to move up quickly; if the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is greater than or equal to the fourth preset height value H i -b, the controller controls the driving platform 1 to reduce the upward movement speed of the grain distributor 2; if the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is less than the third preset height value H i -a, the controller controls the driving platform 1 to further reduce the upward movement speed of the grain distributor 2; if the lower edge height value of the middle grain distribution groove 21 or the far grain distribution groove 22 is greater than or equal to the third preset height value H i -a and is less than or equal to the second preset height value H i+a, the controller controls the driving platform 1 to stop driving the grain distributor 2 to rise and fall, so that the notch of the middle grain distribution groove 21 or the far grain distribution groove 22 is aligned with the discharge port 101 of the i-th layer.

[0056] It can be understood that the present invention converts the lower edge height values ​​of the middle grain distribution trough 21 and the distal grain distribution trough 22 according to the detection results of the ranging element 3, and controls the driving platform 1 to adjust the lifting speed of the grain distributor 2 according to the converted lower edge height values, which can ensure that the position of the middle grain distribution trough 21 or the distal grain distribution trough 22 is aligned with the discharge port 101, thereby improving the docking control accuracy of the grain distribution trough and the discharge port 101.

[0057] In addition, a travel switch 11 is also provided at the bottom of the driving platform 1, and the travel switch 11 is electrically connected to the controller. The controller is also used to issue an alarm reminder and / or control the driving platform 1 to drive the grain distributor 2 to descend when the grain distributor 2 rises and triggers the travel switch 11. When the grain distributor 2 moves to the highest point and continues to rise, the grain distributor 2 will trigger the travel switch 11, and the controller can issue an alarm reminder and control the driving platform 1 to drive the grain distributor 2 to descend, so as to prevent the grain distributor 2 from hitting the driving platform 1 and causing an accident. Optionally, a set of mechanical valves can be added to the driving platform 1. The mechanical valve is a roller lever type, fixed on the lower end surface of the driving platform 1, and a collision plate is installed on the upper plane of the grain distributor 2. When the grain distributor 2 continues to ascend after triggering the travel switch 11, the collision plate will automatically hit the roller action of the mechanical valve, thereby automatically cutting off the ascending air path, prohibiting further ascent, and switching to descending operation at any time. When the grain distributor 2 descends, the mechanical valve automatically returns to its original state.

[0058] In addition, if Figure 3 As shown, the present invention also constructs a grain storage local area network based on a single flexible grain warehousing control system, sets an IP for each grain warehouse group, forms a grain storage area internal network through Ethernet gateways and switches, and combines pre-cleaning equipment, lifting and conveying equipment, and corresponding grain warehouse ventilation and dust removal equipment to form a grain storage center control system.

[0059] like Figure 4 As shown, another embodiment of the present invention further provides a method for controlling grains in a flexible warehousing manner, preferably using the flexible warehousing control system for grains as described above, including the following contents:

[0060] Step S1: Detect the lifting position of the grain distributor and determine whether the grain distributor is aligned with the discharge port of the target layer;

[0061] Step S2: After the grain distributor is aligned with the discharge port of the target layer, the grain pile heights at the grain drop points of the middle grain distribution trough and the far grain distribution trough on the grain distributor are detected, and the grain distributor is controlled to rise and fall according to the detection results of the two grain pile heights, so that when the grain enters the silo at the target layer, it is evenly fed from the periphery of the silo to the center of the silo;

[0062] Step S3: Control the grain distributor to rise and align with the discharge port of the upper layer, and then repeat the above process, so that the grain can be fed into the warehouse layer by layer from bottom to top.

[0063] It can be understood that the flexible grain entry control method of this embodiment can determine whether the grain distributor is aligned with the discharge port of the target layer by detecting the lifting position of the grain distributor. When the grain distributor is aligned with the discharge port of the target layer, the grain pile height at the grain drop point of the middle grain distribution trough and the far grain distribution trough on the grain distributor is detected, and the lifting of the grain distributor is controlled according to the two grain pile height detection results, so that when the grain enters the target layer, it is fed evenly from the periphery of the silo to the center of the silo, and then the grain distributor is controlled to rise and align with the discharge port of the upper layer and the above process is repeated, so that the grain is entered into the silo in a layer-by-layer feeding manner from bottom to top. The flexible grain entry control method of the present invention adopts a layer-by-layer feeding method from bottom to top, which reduces the height of the grain entering the silo, thereby reducing the grain breakage rate and grain loss, and each layer of feeding adopts a method of evenly feeding from the periphery of the silo to the center of the silo, realizing uniform feeding of each layer, making the grain pile in the silo evenly distributed, greatly reducing the amount of warehouse closing operations, thereby realizing flexible grain entry.

[0064] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flexible grain storage control system, characterized in that: The invention comprises a driving platform (1), a grain distributor (2), a distance measuring element (3), a middle-end material level detection element (4), a far-end material level detection element (5) and a controller. The driving platform (1) is fixedly mounted on the top of the silo and is drivingly connected to the grain distributor (2) for driving the grain distributor (2) to move up and down. The distance measuring element (3) is mounted on the driving platform (1) for detecting the lifting position of the grain distributor (2). The driving platform (1) is provided with a first mounting plate (6) and a second mounting plate (7) extending outward, and the first mounting plate (6) and the second mounting plate (7) are staggered in the circumferential direction. The middle-end material level detection element (4) is mounted on the first mounting plate (6) for detecting the middle-end material level of the grain distributor (2). The remote material level detection element (5) is installed on the second mounting plate (7) and is used to detect the height of the grain pile at the grain landing point of the remote grain distribution trough (22) of the grain distributor (2). The controller is electrically connected to the driving platform (1), the distance measuring element (3), the middle material level detection element (4) and the remote material level detection element (5) and is used to issue a control instruction to the driving platform (1) according to the detection results of the distance measuring element (3), the middle material level detection element (4) and the remote material level detection element (5) to drive the grain distributor (2) to adjust the lifting position so that the grain is fed into the silo layer by layer from bottom to top and each layer is fed evenly from the periphery of the silo to the center of the silo.

2. The flexible grain storage control system according to claim 1, characterized in that: In the process of feeding layer by layer from bottom to top, the controller first controls the driving platform (1) to drive the grain distributor (2) to descend, and detects the descending position of the grain distributor (2) through the distance measuring element (3) to determine whether the grain distributor (2) is aligned with the position of the discharge port (101) of the lowest layer on the central column (100). After completing the uniform feeding of the lowest layer, the controller controls the driving platform (1) to drive the grain distributor (2) to rise until it is aligned with the discharge port (101) of the upper layer, and the above process is repeated continuously until the grain distributor (2) rises to the position of the discharge port (101) of the highest layer.

3. The flexible grain storage control system according to claim 2 is characterized in that: During the feeding process of each layer, the controller first controls the driving platform (1) to drive the grain distributor (2) to move upward, so that the far-end grain distribution trough (22) is aligned with the position of the discharge port (101) of this layer, and determines whether the height of the grain pile detected by the far-end material level detection element (5) reaches a preset height value. If the preset height value is reached, the controller then controls the driving platform (1) to drive the grain distributor (2) to move upward, so that the middle-end grain distribution trough (21) is aligned with the position of the discharge port (101) of this layer, and determines whether the height of the grain pile detected by the middle-end material level detection element (4) reaches a preset height value. If the preset height value is reached, the controller then controls the driving platform (1) to drive the grain distributor (2) to move upward, so that the far-end grain distribution trough (22) is aligned with the discharge port (101) of the previous layer, and during the upward movement of the grain distributor (2), grain falls from the discharge port (101) of this layer.

4. The flexible grain storage control system according to claim 3 is characterized in that: When the distance measuring element (3) detects that the lifting position of the grain distributor (2) is aligned with the position of the highest discharge port (101), and the middle-port material level detection element (4) and the far-port material level detection element (5) both detect that the height of the grain pile reaches a preset height value, the controller determines that the silo is full and controls the feeding to be stopped.

5. The flexible grain storage control system according to claim 1, characterized in that: The gate at each discharge port (101) on the central column (100) is driven by a double-stroke driving element. A first material detection element (8) is arranged above the highest discharge port (101) on the central column (100), and a second material detection element (9) is arranged below the highest discharge port (101). The first material detection element (8) and the second material detection element (9) are both electrically connected to a controller. When the second material detection element (9) does not detect material, the controller controls the double-stroke driving element to retract to close the gate. When the second material detection element (9) detects material and the first material detection element (8) does not detect material, the controller controls the double-stroke driving element to extend to the first stroke to drive the gate to partially open. When the first material detection element (8) detects material, the controller controls the double-stroke driving element to extend to the second stroke to drive the gate to fully open.

6. The flexible grain storage control system according to claim 5, characterized in that: Each discharge port (101) on the central column (100) is provided with an air jet, and the controller is also used to control the air jet to spray air when the gate of each discharge port (101) is opened, so as to destroy the grain arch at the discharge port (101).

7. The flexible grain storage control system according to claim 3, characterized in that: During the lifting and lowering process of the grain distributor (2), the controller is also used to convert the lower edge height values ​​of the middle grain distribution trough (21) and the far grain distribution trough (22) according to the detection results of the distance measuring element (3), and control the driving platform (1) to adjust the lifting and lowering speed of the grain distributor (2) according to the converted lower edge height values, so as to ensure that the middle grain distribution trough (21) or the far grain distribution trough (22) is aligned with the discharge port (101).

8. The flexible grain storage control system according to claim 7, characterized in that: During the descent of the grain distributor (2), if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is greater than or equal to a first preset height value, the controller controls the driving platform (1) to drive the grain distributor (2) to move downward quickly; if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is less than the first preset height value, the controller controls the driving platform (1) to reduce the downward movement speed of the grain distributor (2); if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is greater than a second preset height value, the controller controls the driving platform (1) to further reduce the downward movement speed of the grain distributor (2); if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is greater than or equal to a third preset height value and less than or equal to the second preset height value, the controller controls the driving platform (1) to stop driving the grain distributor (2) to rise and fall; During the process of the grain distributor (2) rising, if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is less than a fourth preset height value, the controller controls the driving platform (1) to drive the grain distributor (2) to move up quickly; if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is greater than or equal to the fourth preset height value, the controller controls the driving platform (1) to reduce the upward movement speed of the grain distributor (2); if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is less than the third preset height value, the controller controls the driving platform (1) to further reduce the upward movement speed of the grain distributor (2); if the lower edge height value of the middle grain distribution trough (21) or the distal grain distribution trough (22) is greater than or equal to the third preset height value and less than or equal to the second preset height value, the controller controls the driving platform (1) to stop driving the grain distributor (2) to rise and fall.

9. The flexible grain storage control system according to claim 1, characterized in that: A travel switch (11) is also provided at the bottom of the driving platform (1), and the travel switch (11) is electrically connected to a controller. The controller is also used to issue an alarm and / or control the driving platform (1) to drive the grain distributor (2) to descend when the grain distributor (2) rises and triggers the travel switch (11).

10. A method for controlling grains entering a warehouse flexibly, using the grains entering a warehouse flexibly control system as claimed in any one of claims 1 to 9, characterized in that: Includes the following: Detect the lifting position of the grain distributor and determine whether the grain distributor is aligned with the discharge port of the target layer; When the grain distributor is aligned with the discharge port of the target layer, the grain pile heights at the grain drop points of the middle grain distribution trough and the far grain distribution trough on the grain distributor are detected, and the grain distributor is controlled to rise and fall according to the detection results of the two grain pile heights, so that when the grain enters the silo at the target layer, it is evenly fed from the periphery of the silo to the center of the silo; The grain distributor is controlled to rise and align with the discharge port of the upper layer, and then the above process is repeated, so that the grain can be fed into the warehouse layer by layer from bottom to top.

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