Anti-blocking control system and control method for grain elevator and grain drying equipment

Abstract

The invention discloses an anti-blocking control system and control method for a grain elevator and grain drying equipment, the anti-blocking control system comprises a first rotating speed detection device and a control device, the first rotating speed detection device is used for detecting the rotating speed of the elevator, and the control device is in signal connection with the first rotating speed detection device and a grain stirring wheel. And the control device is configured to control and reduce the rotating speed of the grain stirring wheel under the condition that the rotating speed of the elevator is determined to be reduced according to the detection result of the first rotating speed detection device, so that unsmooth conveying at the elevator can be relieved or avoided until the conveying returns to normal, the subsequent blockage phenomenon can be avoided without increasing the structure of the elevator, and the production efficiency is improved. The purpose of avoiding cost increase is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of grain drying equipment, and particularly relates to an anti-blocking material control system, a control method for a grain elevator, and a grain drying equipment. Background Art

[0002] Existing grain drying equipment can no longer meet the requirement of processing a single type of grain crop. Generally, it is required to have at least the ability to dry the main grain crops (rice, wheat, corn). At the same time, there are many varieties of the main grain crops. Different growth environments of the same type and variety of grain crops will also lead to different degrees of fullness of the grains after maturity, and the impurity content in the grains also varies. These situations make it difficult to optimize the design of the elevator of the grain drying equipment according to the physical parameters (bulk density, friction coefficient, collision recovery coefficient, etc.) of the objects to be processed. If only relying on increasing the structure of the elevator to prevent blockage, it will surely cause an increase in the overall cost. Summary of the Invention

[0003] In view of the above defects or deficiencies, the present invention provides an anti-blocking material control system, a control method for a grain elevator, and a grain drying equipment, aiming to solve the technical problem that relying on increasing the structure of the elevator to prevent blockage will cause an increase in the overall cost.

[0004] To achieve the above object, in a first aspect of the present invention, there is provided an anti-blocking material control system for a grain elevator. The anti-blocking material control system for a grain elevator includes a first rotational speed detection device and a control device. The first rotational speed detection device is used to detect the rotational speed of the elevator. The control device is respectively connected to the first rotational speed detection device and the grain feeding wheel in a signal connection, and is configured to: when it is determined according to the detection result of the first rotational speed detection device that the rotational speed of the elevator becomes smaller, control to reduce the rotational speed of the grain feeding wheel.

[0005] In an embodiment of the present invention, the anti-blocking material control system for a grain elevator further includes a second rotational speed detection device for detecting the rotational speed of the grain feeding wheel. The control device is also connected to the second rotational speed detection device in a signal connection. When it is determined according to the detection result of the first rotational speed detection device that the rotational speed of the elevator becomes smaller, controlling to reduce the rotational speed of the grain feeding wheel includes:

[0006] Receiving the detection results of the first rotational speed detection device and the second rotational speed detection device respectively;

[0007] When it is determined that the rotational speed of the elevator becomes smaller and it is determined according to the detection results of the first rotational speed detection device and the second rotational speed detection device that the blockage warning condition is satisfied, control to reduce the rotational speed of the grain feeding wheel.

[0008] In an embodiment of the present invention, when it is determined that the rotation speed of the elevator becomes smaller and it is determined that the blockage warning condition is satisfied according to the detection results of the first rotation speed detection device and the second rotation speed detection device, controlling the reduction of the rotation speed of the grain feeding wheel includes:

[0009] When it is determined that the rotation speed of the elevator becomes smaller, determine the blockage warning threshold according to the detection result of the second rotation speed detection device;

[0010] Compare the detection result of the first rotation speed detection device with the blockage warning threshold;

[0011] When it is determined that the blockage warning condition is satisfied according to the comparison result, control the reduction of the rotation speed of the grain feeding wheel, where the blockage warning condition is set to that the detection result of the first rotation speed detection device is less than or equal to the blockage warning threshold.

[0012] In an embodiment of the present invention, when it is determined that the rotation speed of the elevator becomes smaller, determining the blockage warning threshold according to the detection result of the second rotation speed detection device includes:

[0013] When it is determined that the rotation speed of the elevator becomes smaller, substitute the detection result of the second rotation speed detection device into the first preset calculation formula to calculate the blockage warning threshold, where the first preset calculation formula is:

[0014]

[0015] In the formula, Y(x) represents the blockage warning threshold, x represents the detection result of the second rotation speed detection device (r / min), A represents the bucket volume (m 3 ), B represents the bulk density of the bucket material (kg / m 3 ), C represents the elevator power (kw), D represents the arrangement density of the buckets (pieces / m), and K1 and K2 represent preset coefficients.

[0016] In an embodiment of the present invention, after comparing the detection result of the first rotation speed detection device with the blockage warning threshold, it further includes:

[0017] When the detection result of the first rotation speed detection device is greater than the blockage warning threshold, control the grain feeding wheel to maintain the current rotation speed;

[0018] When the detection result of the first rotation speed detection device is less than the blockage over-warning threshold, control the grain feeding wheel to stop rotating, where the second preset calculation formula for the blockage over-warning threshold is:

[0019]

[0020] In the formula, M represents the blockage over-warning threshold, A represents the bucket volume (m 3), B represents the bulk density of the bucket materials (kg / m 3 ), C represents the power of the elevator (kw), D represents the arrangement density of the buckets (pcs / m), and K1 and K2 represent preset coefficients.

[0021] In an embodiment of the present invention, the first rotational speed detection device is configured to detect the rotational speed of the lower seat runner of the elevator.

[0022] In an embodiment of the present invention, the control device is also signal-connected to the drive motor of the elevator and is further configured to:

[0023] Receive the detection result of the first rotational speed detection device and determine the current of the drive motor;

[0024] When it is determined that the rotational speed of the elevator becomes smaller and the current of the drive motor changes, control to reduce the rotational speed of the grain distributing wheel and issue a prompt of drive circuit damage.

[0025] To achieve the above object, a second aspect of the present invention provides a material jamming prevention control method for a grain elevator, wherein the material jamming prevention control method includes:

[0026] Detect the rotational speed of the elevator;

[0027] When it is determined that the rotational speed of the elevator becomes smaller according to the rotational speed detection result of the elevator, control to reduce the rotational speed of the grain distributing wheel.

[0028] In an embodiment of the present invention, when it is determined that the rotational speed of the elevator becomes smaller according to the rotational speed detection result of the elevator, controlling to reduce the rotational speed of the grain distributing wheel includes:

[0029] When it is determined that the rotational speed of the elevator becomes smaller, determine the blockage warning threshold according to the rotational speed detection result of the grain distributing wheel;

[0030] Compare the rotational speed detection result of the elevator with the blockage warning threshold;

[0031] When it is determined that the blockage warning condition is satisfied according to the comparison result, control to reduce the rotational speed of the grain distributing wheel, where the blockage warning condition is set that the rotational speed detection result of the elevator is less than or equal to the blockage warning threshold.

[0032] To achieve the above object, a third aspect of the present invention provides a grain drying device, wherein the grain drying device includes the material jamming prevention control system for a grain elevator as described above.

[0033] Through the above technical solutions, the material jamming prevention control system for a grain elevator provided by the present invention has the following beneficial effects:

[0034] When the grain elevator uses the above anti-blocking material control system, when the first rotational speed detection device detects that the rotational speed of the elevator decreases, it can be determined that the elevator is currently or about to face the situation of unsmooth conveying. The unsmooth conveying is the early stage of blockage occurrence. The incoming grain at the elevator consists of two parts: the grain flowing down by gravity from the grain channel and the grain dialed by the grain dialing wheel. At this time, controlling the reduction of the rotational speed of the grain dialing wheel can relieve or avoid the unsmooth conveying at the elevator until the conveying returns to normal, so that it is possible to avoid the subsequent blockage phenomenon without relying on increasing the structure of the elevator, achieving the purpose of avoiding cost increase.

[0035] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0036] The drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the embodiments of the present invention, but do not constitute a limitation to the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0037] Figure 1 It is a schematic diagram of the control principle of the anti-blocking material control system in an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of the elevator in an embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the grain dialing wheel in an embodiment of the present invention;

[0040] Figure 4 It is a control flowchart of the anti-blocking material control system in the first embodiment of the present invention.

[0041] Description of the Reference Numerals in the Drawings:

[0042] 100 Elevator 110 Lower seat runner

[0043] 120 Upper seat runner 130 Elevating conveyor belt

[0044] 131 Skip 200 Grain dialing wheel

[0045] 201 Grain channel Specific Embodiments

[0046] The following are detailed descriptions of specific embodiments of the present invention with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0047] The anti-blocking material control system, control method and grain dryer for a grain elevator of the present invention will be described below with reference to the accompanying drawings.

[0048] As Figure 1 and Figure 2 shown, the present invention provides an anti-blocking material control system for a grain elevator. Among them, the anti-blocking material control system for a grain elevator includes:

[0049] A first rotation speed detection device for detecting the rotation speed of the elevator 100;

[0050] A control device, which is respectively signal-connected to the first rotation speed detection device and the grain-pushing wheel 200 of the elevator 100, and is configured to:

[0051] When it is determined according to the detection result of the first rotation speed detection device that the rotation speed of the elevator 100 becomes smaller, control the reduction of the rotation speed of the grain-pushing wheel 200.

[0052] When the above anti-blocking material control system is used for the grain elevator, when the first rotation speed detection device detects that the rotation speed of the elevator 100 becomes smaller, it can be determined that the elevator 100 is facing the situation of unsmooth transportation. Unsmooth transportation is the early stage of blockage. The incoming grain at the elevator 100 consists of two parts: the grain flowing down by gravity from the grain channel 201 and the grain pushed down by the grain-pushing wheel 200. At this time, controlling the reduction of the rotation speed of the grain-pushing wheel 200 can relieve the unsmooth transportation at the elevator 100 until the transportation returns to normal, so that it is possible to avoid the subsequent blockage phenomenon without relying on increasing the structure of the elevator 100, achieving the purpose of avoiding cost increase.

[0053] It should be particularly noted that when the first rotation speed detection device detects that the rotation speed of the elevator 100 becomes smaller, it may be because the weight of the same volume of grain is greater; it may also be due to the damage of the circuit components in the drive circuit of the drive motor of the elevator 100, resulting in a decrease in the current of the drive motor. In addition, the signal connection mentioned in the present invention can be either wire connection or wireless connection.

[0054] See Figures 1 to 4 , in an embodiment of the present invention, the anti-blocking material control system for a grain elevator further includes a second rotation speed detection device for detecting the rotation speed of the grain-pushing wheel 200. The control device is also signal-connected to the second rotation speed detection device. When it is determined according to the detection result of the first rotation speed detection device that the rotation speed of the elevator 100 becomes smaller, controlling the reduction of the rotation speed of the grain-pushing wheel 200 includes:

[0055] Step S100, respectively receiving the detection results of the first rotation speed detection device and the second rotation speed detection device.

[0056] Step S200, when it is determined that the rotational speed of the elevator 100 decreases and it is determined that the clogging warning condition is satisfied according to the detection results of the first rotational speed detection device and the second rotational speed detection device, control the rotational speed of the grain feeding wheel 200 to decrease.

[0057] It can be understood that in actual production, the rotational speed of the elevator 100 changes frequently. It is not possible to execute the control to reduce the rotational speed of the grain feeding wheel 200 just because the rotational speed decreases. Frequent system actions will cause oscillations and affect the normal operation of the system. Moreover, frequent control will cause the actuator to work excessively, easily resulting in wear and increased energy consumption. Therefore, when measuring whether the decrease in the rotational speed of the elevator 100 requires a clogging warning, the rotational speed of the grain feeding wheel 200 can be incorporated into the measurement factors, and a discriminant for satisfying the clogging warning condition can be established in advance based on the detection results of the first rotational speed detection device and the second rotational speed detection device. Only when the detection results of the first rotational speed detection device and the second rotational speed detection device are substituted into the discriminant and the discriminant holds, it is determined that the clogging warning condition is satisfied and a clogging warning is required. If it does not hold after substitution into the discriminant, some changes can be excluded and no clogging warning is required, and it has been verified that the changes excluded by the discriminant will not cause clogging.

[0058] See Figure 4 , in the first embodiment of the present invention, step S200, when it is determined that the rotational speed of the elevator 100 decreases and it is determined that the clogging warning condition is satisfied according to the detection results of the first rotational speed detection device and the second rotational speed detection device, controlling the rotational speed of the grain feeding wheel 200 to decrease includes:

[0059] Step S210, when it is determined that the rotational speed of the elevator 100 decreases, determine the clogging warning threshold according to the detection result of the second rotational speed detection device.

[0060] Step S220, compare the detection result of the first rotational speed detection device with the clogging warning threshold.

[0061] Step S230, when it is determined that the clogging warning condition is satisfied according to the comparison result, control the rotational speed of the grain feeding wheel 200 to decrease, where the clogging warning condition is set such that the detection result of the first rotational speed detection device is less than or equal to the clogging warning threshold.

[0062] Further, the discriminant established according to the detection results of the first rotational speed detection device and the second rotational speed detection device and satisfying the clogging warning condition is: Z(x) ≤ Y(x), where Z(x) represents the detection result of the first rotational speed detection device, and Y(x) represents the clogging warning threshold and is determined according to the detection result of the second rotational speed detection device. When substituting the detection result of the first rotational speed detection device into the above discriminant, if the discriminant holds, then control to reduce the rotational speed of the grain feeding wheel 200; if the discriminant does not hold, then control to maintain the current rotational speed of the grain feeding wheel 200. In addition, the determination of the clogging warning threshold is based on the detection result of the second rotational speed detection device, so that the detection results of different second rotational speed detection devices correspond to different clogging warning thresholds. It can be understood that the rotational speed settings of the elevator 100 and the grain feeding wheel 200 in equipment of different specifications are different, and for grain feeding matching, the rotational speed of the elevator 100 and the rotational speed of the grain feeding wheel 200 in the same equipment must be associated and matched. Then each specification of equipment has a clogging warning threshold matching the feeding performance parameters of the equipment, thereby meeting the requirements of different specifications of equipment.

[0063] In an embodiment of the present invention, in step S210, when it is determined that the rotational speed of the elevator 100 becomes smaller, determining the clogging warning threshold according to the detection result of the second rotational speed detection device includes:

[0064] When it is determined that the rotational speed of the elevator 100 becomes smaller, substitute the detection result of the second rotational speed detection device into the first pre - calculation formula to calculate the clogging warning threshold, where the first pre - calculation formula is:

[0065]

[0066] In the formula, Y(x) represents the clogging warning threshold, x represents the detection result of the second rotational speed detection device (r / min), A represents the bucket volume (m 3 ), B represents the bulk density of the material in the bucket (kg / m 3 ), C represents the power of the elevator (kw), D represents the arrangement density of the buckets (pieces / m), and K1 and K2 represent preset coefficients.

[0067] Further, below the current rotational speed of the grain feeding wheel 200, the current rotational speed of the elevator 100 should be greater than the clogging warning threshold obtained through the first pre - calculation formula to prevent subsequent clogging from occurring. The first pre - calculation formula for the clogging warning threshold is pre - constructed with the detection result of the second rotational speed detection device, the bucket volume, the bulk density of the material in the bucket, the power of the elevator, and the arrangement density of the buckets, so that the first pre - calculation formula for the clogging warning threshold can be applied to elevators of different models and specifications. It should be particularly noted that the preset coefficients K1 and K2 are obtained through experimental analysis and estimation, and the dimension of the preset coefficients can be set so that the dimensions on both sides of the equation are consistent.

[0068] In an embodiment of the present invention, after comparing the detection result of the first rotational speed detection device with the clogging warning threshold in step S220, it further includes:

[0069] When the detection result of the first rotational speed detection device is greater than the clogging warning threshold, control the grain feeding wheel 200 to maintain the current rotational speed;

[0070] When the detection result of the first rotational speed detection device is less than the clogging over-warning threshold, control the grain feeding wheel 200 to stop rotating, where the second preset calculation formula for the clogging over-warning threshold is:

[0071]

[0072] In the formula, M represents the clogging over-warning threshold, A represents the bucket volume (m 3 ), B represents the bulk density of the material in the bucket (kg / m 3 ), C represents the power of the elevator (kw), D represents the arrangement density of the buckets (pieces / m), and K1 and K2 represent preset coefficients.

[0073] Specifically, according to the detection result of the first rotational speed detection device, a safety range, a warning range, and a clogging range can be set. When Z(x) > Y(x), it is considered that the detection result of the first rotational speed detection device is in the safety range at this time, and the control system does not intervene, and the grain feeding wheel 200 maintains the current rotational speed; when M < Z(x) < Y(x), it is considered that it is in the warning range at this time, and the control system issues an instruction to the frequency converter of the grain feeding wheel 200 to control the reduction of the rotational speed of the grain feeding wheel 200; when Z(x) < M, it is considered that it is in the clogging range at this time, and the grain feeding wheel 200 can be controlled to stop rotating.

[0074] In the second embodiment of the present invention, in step S200, when it is determined that the rotational speed of the elevator 100 becomes smaller and it is determined that the clogging warning condition is satisfied according to the detection results of the first rotational speed detection device and the second rotational speed detection device, controlling the reduction of the rotational speed of the grain feeding wheel 200 includes:

[0075] When it is determined that the rotational speed of the elevator 100 becomes smaller, calculate the difference between the detection results of the first rotational speed detection device and the second rotational speed detection device, and compare the difference with a preset warning interval;

[0076] When the difference is within the preset warning interval, control the reduction of the rotational speed of the grain feeding wheel 200;

[0077] When the difference is less than the minimum threshold of the preset warning interval, control the grain feeding wheel 200 to maintain the current rotational speed;

[0078] When the difference value is greater than the maximum threshold value of the preset warning range, control the grain feeding wheel 200 to stop rotating.

[0079] Understandably, in order to ensure the smoothness of the feeding, the rotational speed of the grain feeding wheel 200 is usually set to be smaller than that of the elevator 100. By studying the difference between the two, it is determined that there is a risk of subsequent potential blockage within a certain preset warning range. Thus, by comparing the difference value with the preset warning range and making corresponding controls based on the comparison result, some changes that do not require blockage warning can also be excluded.

[0080] In an embodiment of the present invention, the first rotational speed detection device is set to detect the rotational speed of the lower seat runner 110 of the elevator 100. That is, the first rotational speed detection device is arranged corresponding to the lower seat runner 110 of the elevator 100. Since when the rotational speed of the elevator 100 changes, the lower seat runner 110 is preferentially sensed, the detection result of the first rotational speed detection device will be more accurate. Of course, the present invention is not limited to this. The first rotational speed detection device can also be set to detect the speed of the upper seat runner 120 or the lifting conveyor belt 130.

[0081] Specifically, the elevator 100 includes an upper seat runner 120, a lower seat runner 110, and a lifting conveyor belt 130 wound around the upper seat runner 120 and the lower seat runner 110. The driving motor can be drivingly connected to the upper seat runner 120 of the elevator 100. The upper seat runner 120 transmits power to the lower seat runner 110 through the lifting conveyor belt 130 to drive the lower seat runner 110 to rotate. A plurality of buckets 131 are sequentially and spaced apart in the circumferential direction of the lifting conveyor belt 130. When the lifting conveyor belt 130 is a belt, the upper seat runner 120 and the lower seat runner 110 are correspondingly belt wheels; when the lifting conveyor belt 130 is a chain, the upper seat runner 120 and the lower seat runner 110 are correspondingly sprockets.

[0082] In an embodiment of the present invention, the control device is further in signal connection with the driving motor of the elevator 100 and is further configured to:

[0083] Receive the detection result of the first rotational speed detection device and determine the current of the driving motor;

[0084] When it is determined that the rotational speed of the elevator 100 becomes smaller and the current of the driving motor changes, control to reduce the rotational speed of the grain feeding wheel 200 and issue a prompt of driving circuit damage.

[0085] Further, when it is detected that the rotational speed of the elevator 100 decreases, it is also possible to determine the reason for the change in the rotational speed of the elevator 100 by determining whether the current of the drive motor changes. If the current of the drive motor does not change, it can be determined that the change in the rotational speed of the elevator 100 is due to the change in the weight of the grain; if the current of the drive motor changes, it can be determined that the change in the rotational speed of the elevator 100 is due to the damage of the circuit components in the drive circuit of the drive motor. At this time, in addition to controlling the reduction of the rotational speed of the grain feeding wheel 200, an alarm prompt can also be issued to prompt for corresponding troubleshooting.

[0086] In addition, the present invention also provides a method for controlling anti-blocking of a grain elevator, wherein the anti-blocking control method includes:

[0087] Detect the rotational speed of the elevator 100;

[0088] When it is determined according to the rotational speed detection result of the elevator 100 that the rotational speed of the elevator 100 decreases, control the reduction of the rotational speed of the grain feeding wheel 200.

[0089] When the grain elevator uses the above anti-blocking control method, when it is detected that the rotational speed of the elevator 100 decreases, it can be determined that the elevator 100 is facing the situation of unsmooth conveying, and the unsmooth conveying is the early stage of blockage. The incoming grain at the elevator 100 consists of two parts: the grain sliding down by gravity from the grain channel 201 and the grain dialed by the grain feeding wheel 200. At this time, controlling the reduction of the rotational speed of the grain feeding wheel 200 can relieve the unsmooth conveying at the elevator 100 until the conveying returns to normal, so that it is possible to avoid the occurrence of subsequent blockage phenomena without relying on increasing the structure of the elevator 100, achieving the purpose of avoiding cost increase.

[0090] Specifically, the anti-blocking control method is applied to the anti-blocking control system described above, and further includes the above steps executed by the control device in the anti-blocking control system.

[0091] In an embodiment of the present invention, when it is determined according to the rotational speed detection result of the elevator 100 that the rotational speed of the elevator 100 decreases, control the reduction of the rotational speed of the grain feeding wheel 200:

[0092] When it is determined that the rotational speed of the elevator 100 decreases, determine the blockage warning threshold according to the rotational speed detection result of the grain feeding wheel 200;

[0093] Compare the rotational speed detection result of the elevator 100 with the blockage warning threshold;

[0094] When it is determined according to the comparison result that the blockage warning condition is satisfied, control the reduction of the rotational speed of the grain feeding wheel 200, where the blockage warning condition is set as the rotational speed detection result of the elevator 100 being less than or equal to the blockage warning threshold.

[0095] Specifically, a first rotational speed detection device can be set to detect the rotational speed of the elevator 100, and a second rotational speed detection device can be set to detect the rotational speed of the grain distributing wheel 200. The discriminant that satisfies the blockage warning condition established based on the detection results of the first rotational speed detection device and the second rotational speed detection device is: Z(x) ≤ Y(x), where Z(x) represents the detection result of the first rotational speed detection device, and Y(x) represents the blockage warning threshold and is determined according to the detection result of the second rotational speed detection device. When substituting the detection result of the first rotational speed detection device into the above discriminant, if the discriminant holds, then control is performed to reduce the rotational speed of the grain distributing wheel 200; if the discriminant does not hold, then control is performed to maintain the current rotational speed of the grain distributing wheel 200. In addition, the determination of the blockage warning threshold is based on the detection result of the second rotational speed detection device, so that the detection results of different second rotational speed detection devices correspond to different blockage warning thresholds. It can be understood that the rotational speed settings of the elevator 100 and the grain distributing wheel 200 in equipment of different specifications are different, and in order to match the grain feeding, the rotational speed of the elevator 100 and the rotational speed of the grain distributing wheel 200 in the same equipment must be associated and matched. Then, each specification of equipment has a blockage warning threshold that matches the feeding performance parameters of the equipment, thereby meeting the requirements of different specifications of equipment.

[0096] More specifically, in one embodiment, the anti-blocking control method includes the following steps:

[0097] 1. Detect the rotational speeds of the elevator and the grain distributing wheel respectively;

[0098] 2. When it is determined that the rotational speed of the elevator becomes smaller, determine the blockage warning threshold according to the rotational speed of the grain distributing wheel;

[0099] 3. Compare the rotational speed of the elevator with the blockage warning threshold;

[0100] 4. When the rotational speed of the elevator is greater than the blockage warning threshold, control the grain distributing wheel to maintain the current rotational speed; when the rotational speed of the elevator is less than or equal to the blockage warning threshold and greater than or equal to the blockage over-warning threshold, control to reduce the rotational speed of the grain distributing wheel; when the rotational speed of the elevator is less than the blockage over-warning threshold, control the grain distributing wheel to stop rotating.

[0101] Meanwhile, in another embodiment, the anti-blocking control method includes the following steps:

[0102] 1. Detect the rotational speeds of the elevator and the grain distributing wheel respectively;

[0103] 2. When it is determined that the rotational speed of the elevator becomes smaller, calculate the difference between the rotational speed of the elevator and the rotational speed of the grain distributing wheel, and compare the difference with a preset warning interval;

[0104] 3. When the difference is within the preset warning range, control to reduce the rotation speed of the grain feeding wheel; when the difference is less than the minimum threshold of the preset warning range, control the grain feeding wheel to maintain the current rotation speed; when the difference is greater than the maximum threshold of the preset warning range, control the grain feeding wheel to stop rotating.

[0105] In addition, the present invention further provides a grain drying device, wherein the grain drying device includes the anti-blocking material control system for the grain elevator described above. Since the grain drying device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0106] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0107] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0108] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0109] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An anti-blocking material control system for a grain elevator, characterized in that, The anti-blocking material control system for the grain elevator includes: A first rotational speed detection device for detecting the rotational speed of the elevator (100); A control device, which is respectively signal-connected to the first rotational speed detection device and the grain feeding wheel (200), and is configured to: When it is determined according to the detection result of the first rotational speed detection device that the rotational speed of the elevator (100) becomes smaller, control to reduce the rotational speed of the grain feeding wheel (200).

2. The anti-blocking material control system for a grain elevator according to claim 1, wherein, The anti-blocking material control system for the grain elevator further includes a second rotational speed detection device for detecting the rotational speed of the grain feeding wheel (200). The control device is also signal-connected to the second rotational speed detection device. When it is determined according to the detection result of the first rotational speed detection device that the rotational speed of the elevator (100) becomes smaller, controlling to reduce the rotational speed of the grain feeding wheel (200) includes: Receiving the detection results of the first rotational speed detection device and the second rotational speed detection device respectively; When it is determined that the rotational speed of the elevator (100) becomes smaller and it is determined according to the detection results of the first rotational speed detection device and the second rotational speed detection device that the blockage warning condition is satisfied, control to reduce the rotational speed of the grain feeding wheel (200).

3. The anti-blocking material control system for a grain elevator according to claim 2, wherein, When it is determined that the rotational speed of the elevator (100) becomes smaller and it is determined according to the detection results of the first rotational speed detection device and the second rotational speed detection device that the blockage warning condition is satisfied, controlling to reduce the rotational speed of the grain feeding wheel (200) includes: When it is determined that the rotational speed of the elevator (100) becomes smaller, determining the blockage warning threshold according to the detection result of the second rotational speed detection device; Comparing the detection result of the first rotational speed detection device with the blockage warning threshold; When it is determined according to the comparison result that the blockage warning condition is satisfied, control to reduce the rotational speed of the grain feeding wheel (200), where the blockage warning condition is set as the detection result of the first rotational speed detection device being less than or equal to the blockage warning threshold.

4. The anti-blocking material control system for a grain elevator according to claim 3, wherein, When it is determined that the rotational speed of the elevator (100) becomes smaller, determining the blockage warning threshold according to the detection result of the second rotational speed detection device includes: When it is determined that the rotational speed of the elevator (100) becomes smaller, substituting the detection result of the second rotational speed detection device into a first preset calculation formula to calculate the blockage warning threshold, where the first preset calculation formula is: Wherein, Y(x) represents the blockage warning threshold, x represents the detection result of the second rotational speed detection device (r / min), A represents the bucket volume (m 3 ), B represents the bulk density of the bucket material (kg / m 3 ), C represents the power of the elevator (kw), D represents the arrangement density of the buckets (pcs / m), and K1 and K2 represent preset coefficients.

5. The anti-blocking material control system for a grain elevator according to claim 3, wherein, After comparing the detection result of the first rotational speed detection device with the blockage warning threshold, it further includes: When the detection result of the first rotational speed detection device is greater than the blockage warning threshold, controlling the grain feeding wheel (200) to maintain the current rotational speed; When the detection result of the first rotational speed detection device is less than the blockage over-warning threshold, controlling the grain feeding wheel (200) to stop rotating, where the second preset calculation formula for the blockage over-warning threshold is: Wherein, M represents the clogging over-warning threshold, A represents the bucket volume (m 3 ), B represents the bulk density of the material in the bucket (kg / m 3 ), C represents the power of the elevator (kw), D represents the arrangement density of the buckets (pcs / m), and K1 and K2 represent preset coefficients.

6. The anti-blocking material control system for a grain elevator according to any one of claims 1 to 5, characterized in that, The first rotational speed detection device is set to detect the rotational speed of the lower seat runner (110) of the elevator (100).

7. The anti-blocking material control system for a grain elevator according to any one of claims 1 to 5, characterized in that, The control device is also signal-connected to the drive motor of the elevator (100) and is further configured to: Receive the detection result of the first rotational speed detection device and determine the current of the drive motor; When it is determined that the rotational speed of the elevator (100) decreases and the current of the drive motor changes, control the rotational speed of the grain feeding wheel (200) to decrease and issue a prompt indicating damage to the drive circuit.

8. A control method for preventing material blockage in a grain elevator, characterized in that, The anti-blocking control method includes: Detect the rotational speed of the elevator (100); When it is determined that the rotational speed of the elevator (100) decreases according to the rotational speed detection result of the elevator (100), control the rotational speed of the grain feeding wheel (200) to decrease.

9. The anti-blocking material control method for a grain elevator according to claim 8, characterized in that The step of controlling the rotational speed of the grain feeding wheel (200) to decrease when it is determined that the rotational speed of the elevator (100) decreases according to the rotational speed detection result of the elevator (100) includes: When it is determined that the rotational speed of the elevator (100) decreases, determine the blockage warning threshold according to the rotational speed detection result of the grain feeding wheel (200); Compare the rotational speed detection result of the elevator (100) with the blockage warning threshold; When it is determined that the blockage warning condition is met according to the comparison result, control the rotational speed of the grain feeding wheel (200) to decrease, where the blockage warning condition is set as the rotational speed detection result of the elevator (100) being less than or equal to the blockage warning threshold.

10. A grain drying device, characterized in that, The grain drying equipment includes the anti-blocking control system for a grain elevator according to any one of claims 1 to 7.

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