Material conveying device and anti-blocking control method

Abstract

The invention relates to the technical field of material conveying equipment, and discloses a material conveying device and an anti-blocking control method. The material conveying device comprises a bucket elevator, a current detector, a material clearing module, a feeding module and a controller. The bucket elevator is provided with a feeding hole; the current detector is arranged on the bucket elevator and is used for detecting the running current of the bucket elevator; the material cleaning module is arranged at the bottom of the feeding port and used for pushing materials in the feeding direction of the materials on the feeding port. The feeding module is arranged on one side of the bucket elevator and used for conveying materials to the feeding port. And the controller is configured to control the material cleaning module to execute material pushing operation and / or control the material feeding operation of the material feeding module according to the running current. According to the material conveying device, the severity of material blocking of the feeding port can be judged according to the size of the running current of the bucket elevator, the influence of the working environment is small, automatic cleaning of blocked materials is achieved, labor intensity is reduced, safety is improved, meanwhile, normal running of equipment is guaranteed, and the working progress is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of material conveying equipment, and specifically relates to a material conveying device and a material blocking prevention control method. Background Art

[0002] The material conveying device is also called bucket elevator, which is a continuous conveying machine that uses a series of buckets evenly fixed on the chain to vertically lift materials. It is mainly used for vertical conveying of powder, granular and small block materials. Bucket elevator has the advantages of compact structure, large conveying capacity, high lifting height, wide applicable material temperature range, low driving power, long service life, etc. It is widely used in sandstone, cement, mining, building materials, chemical industry, metallurgy and other industries.

[0003] During the production process, the feed port of the bucket elevator is prone to jamming and causing material accumulation, especially when lifting materials with high powder content and high moisture content. In severe cases, it will cause blockage, resulting in a reduction in the amount of material entering, and thus a reduction in the amount of material discharged, which has a great impact on the production of subsequent processes. At present, the problem of material blockage at the feed port can only be observed manually on a regular basis, and it can only be identified when there is serious blockage at the feed port of the bucket elevator. At this time, the feed port of the bucket elevator has been blocked, and a large amount of material has spilled on the ground. The machine needs to be stopped to manually remove the material, which is time-consuming and labor-intensive, affecting the progress of the operation. Summary of the invention

[0004] The purpose of this application is to provide a material conveying device and an anti-blocking control method to detect the blockage of materials at the feed inlet and automatically clear the material, thereby ensuring the normal and stable operation of the equipment and guaranteeing the progress of the operation.

[0005] In order to achieve the above objectives, the present application provides a material conveying device, comprising:

[0006] Bucket elevator, equipped with a feed port;

[0007] A current detector, arranged on the bucket elevator and used for detecting the operating current of the bucket elevator;

[0008] A material clearing module is arranged at the bottom of the feed inlet and is used to push the material along the material entry direction on the feed inlet;

[0009] A feeding module, arranged at one side of the bucket elevator, for conveying materials to the feeding port; and

[0010] The controller is configured to control the material cleaning module to perform a material pushing operation and / or control the material feeding operation of the material feeding module according to the operating current.

[0011] As a further improvement of the above technical solution:

[0012] In some embodiments, the cleaning module comprises:

[0013] A driving mechanism is arranged on the outer side of the material guiding bottom plate with the feed inlet at the bottom; and

[0014] The pushing member is arranged on the inner side of the material guiding bottom plate and is in driving connection with the driving mechanism. The driving mechanism is used to drive the pushing member to move back and forth along the material entry direction on the feed port to push the material.

[0015] In some embodiments, the material cleaning module further includes a stroke detector electrically connected to the controller, wherein the stroke detector is disposed on the driving mechanism and is used to detect the pushing stroke of the pushing member.

[0016] In some embodiments, the length of the pusher is consistent with the width of the material guiding bottom plate.

[0017] In some embodiments, the driving mechanism includes an electric push rod, an electric cylinder, an oil cylinder, an air cylinder, a linear motor or a lead screw motor.

[0018] In some embodiments, the discharge end of the feeding module corresponds to the feed port and is provided with a sealing cover.

[0019] In some embodiments, the feeding module is a belt conveyor or a screw conveyor.

[0020] In some embodiments, the current detector includes a current transformer, and the current transformer is disposed on an incoming cable of a drive motor in the bucket elevator.

[0021] A second aspect of the present application provides a material blocking control method, which is applied to the material conveying device provided according to the first aspect. The material blocking control method includes:

[0022] S100: Obtaining the operating current of the bucket elevator;

[0023] S200: When the operating current is less than a first preset current value, the feeding module is controlled to stop feeding and the cleaning module is controlled to perform a material pushing action, and step S300 is performed until the operating current is greater than the first preset current value;

[0024] S300: When the operating current is greater than the first preset current value and less than the second preset current value, controlling the feeding module to reduce the feeding speed and controlling the cleaning module to perform a material pushing action until the operating current is greater than the second preset current value and less than the operating current of the bucket elevator when it is in safe operation;

[0025] The first preset current value is set to I N1, the second preset current value is I N2 The operating current of the bucket elevator when running at no load is I N0 The operating current for safe operation of the bucket elevator is I N3 , I N0 <I N1 <I N2 <I N3 .

[0026] As a further improvement of the above technical solution:

[0027] In some embodiments, the operating current of the bucket elevator in step S100 is an average value of multiple groups of currents collected within a preset time interval.

[0028] The present application provides a material conveying device and a material blocking prevention control method, wherein the material conveying device detects the operating current of a bucket elevator through a current detector. When the operating current of the bucket elevator is relatively small, it indicates that the feeding of the feed port is reduced, so that it can be judged that the material is stuck at the feed port and causes the accumulation problem. In this way, the obtained operating current of the bucket elevator can be compared with the set first preset current value and the second preset current value, and the first preset current value is less than the second preset current value; thus, when the obtained operating current of the bucket elevator is less than the first preset current value, it is judged that the material blocking is more serious. At this time, the cleaning module can be controlled by the controller to push the material blocked in the feed port into the bucket elevator, and the feeding module can also be controlled to stop feeding; when the obtained operating current of the bucket elevator is greater than the first preset current value and less than the second preset current value, it can be judged that there is material accumulation in the feed port and the material blocking is not serious. At this time, the cleaning module can be controlled by the controller to push the material blocked in the feed port into the bucket elevator, and the feeding module can also be controlled to reduce the feeding speed. In this way, the material conveying device provided in the present application can judge the severity of the blockage at the feed port by the operating current of the bucket elevator. There is no need to arrange other detection elements at the feed port, so it is less affected by the working environment. At the same time, a material cleaning module is used to realize automatic material pushing and control the operation of the feeding module. There is no need to arrange manual shutdown for cleaning, which reduces labor intensity and improves safety, while ensuring the normal operation of the equipment and the progress of the operation.

[0029] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0031] Figure 1 A schematic structural diagram of a material conveying device provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 A schematic diagram of a partial structure of a material conveying device shown;

[0033] Figure 3 A schematic diagram of a control module of a material conveying device provided in an embodiment of the present application;

[0034] Figure 4 A flowchart of a material blocking prevention control method provided in an embodiment of the present application;

[0035] Figure 5 A control logic diagram of an anti-blocking material control method provided in an embodiment of the present application.

[0036] Description of Reference Numerals

[0037] 100, bucket elevator; 110, housing; 120, lifting chain; 130, hopper; 140, feed port; 141, guide plate; 150, discharge port; 160, sealing cover;

[0038] 200, current detector;

[0039] 300, material cleaning module; 310, driving mechanism; 320, material pushing member; 330, travel detector;

[0040] 400. Feeding module;

[0041] 500. Controller. DETAILED DESCRIPTION

[0042] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0043] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0044] Embodiment 1

[0045] See also Figure 1 , Figure 2 and Figure 3 This embodiment provides a material conveying device. The material conveying device is mainly used for vertically conveying powder, granular and small block materials. It has the advantages of compact structure, large conveying capacity, high lifting height, wide applicable material temperature range, low driving power, long service life, etc. It is widely used in sandstone, cement, mining, building materials, chemical industry, metallurgy and other industries.

[0046] In this embodiment, the material conveying device includes a bucket elevator 100, a current detector 200, a material cleaning module 300, a material feeding module 400 and a controller 500. The bucket elevator 100, also known as a bucket elevator, is a continuous conveying machine that vertically lifts materials using a series of buckets 130 evenly fixed on a chain.

[0047] The bucket elevator 100 includes a housing 110, a lifting chain 120 and a plurality of buckets 130. The housing 110 is arranged vertically, the lifting chain 120 is arranged in the housing 110, and a material head is arranged on the lifting chain 120. The lifting chain 120 is driven by a driving motor to lift materials in a vertical direction.

[0048] The upper end of the housing 110 is provided with a discharge port 150, and the lower end is provided with a feed port 140. The feed port 140 is used to put materials into the bucket elevator 100, and then the hopper 130 transports the materials to the discharge port 150 for output.

[0049] The current detector 200 is disposed on the bucket elevator 100 to detect the operating current of the bucket elevator 100. Specifically in this embodiment, the current detector 200 is used to detect the operating current when the motor is working.

[0050] In this embodiment, the current detector 200 includes a current transformer, which is disposed on an incoming cable of a driving motor in the bucket elevator 100 to detect the operating current of the motor.

[0051] The material clearing module 300 is disposed at the bottom of the feed port 140 and is used to push the material along the material entry direction of the feed port 140. The material feeding module 400 is arranged at one side of the bucket elevator 100 and is used to convey the material to the feed port 140.

[0052] The controller 500 is electrically connected to the current detector 200, the cleaning module 300 and the feeding module 400. Thus, in the present embodiment, the controller 500 is configured to control the cleaning module 300 to perform a material pushing operation and / or control the feeding module 400 to perform a material feeding operation according to the operating current. In other words, the severity of the material blockage can be determined according to the operating current, and then the cleaning module 300 can be controlled to perform a material pushing operation or the feeding module 400 can be controlled to reduce the feeding speed or stop the feeding. Of course, the cleaning module 300 can also be controlled to perform a material pushing operation and control the feeding speed of the feeding module 400 or stop the feeding simultaneously.

[0053] Among them, optionally, the controller 500 can be selected as a PLC controller 500, an industrial computer, an industrial computer or a single-chip microcomputer. It should be understood that the above is only an example and is not intended to limit the scope of protection of this application.

[0054] It can be understood that the material conveying device detects the operating current of the bucket elevator 100 through the current detector 200. When the operating current of the bucket elevator 100 is relatively small (relative to the current of normal operation), it means that the feed of the feed port 140 is reduced, thereby reducing the load on the drive motor and the operating current. It can be determined that the material is stuck in the feed port 140 and causes accumulation and blockage problems.

[0055] In order to better judge the severity of the blockage, in this example, a first preset current value and a second preset current value may be set, the first preset current value is smaller than the second preset current value, and the second preset current value is smaller than the current value of the normal operation of the bucket elevator 100. In this way, the obtained operating current of the bucket elevator 100 may be compared with the set first preset current value and the second preset current value, respectively, to judge the severity of the blockage at the feed port 140.

[0056] Specifically, when the operating current of the bucket elevator 100 obtained is less than the first preset current value, it can be determined that the blockage is serious. At this time, the controller 500 can be used to control the cleaning module 300 to push the material blocked by the feed port 140 into the bucket elevator 100, and the feeding module 400 can also be controlled to stop feeding. When the operating current of the bucket elevator 100 obtained is greater than the first preset current value and less than the second preset current value, it can be determined that there is material accumulation at the feed port 140 and the blockage is not serious. At this time, the controller 500 can be used to control the cleaning module 300 to push the material blocked by the feed port 140 into the bucket elevator 100, and the feeding module 400 can also be controlled to reduce the feeding speed.

[0057] In this way, compared with the prior art, the material conveying device provided in this embodiment can judge the severity of the blockage of the feed port 140 by the operating current of the bucket elevator 100, and there is no need to arrange other detection elements at the feed port 140, so it is less affected by the working environment. At the same time, the cleaning module 300 is used to realize automatic material pushing and control the operation of the feeding module 400. There is no need to arrange manual shutdown for cleaning, which reduces labor intensity and improves safety, while ensuring the normal operation of the equipment and the progress of the operation.

[0058] In order to more clearly describe the technical solution of the present application, the material conveying device provided in this embodiment is described below. The details are as follows:

[0059] A material guide plate 141 is disposed at the bottom of the feed inlet 140 , and the material guide plate 141 is arranged to be inclined toward the bottom of the shell 110 , so as to facilitate the material entering the feed inlet 140 to be introduced into the shell 110 .

[0060] See also Figure 1 and Figure 2The above-mentioned material cleaning module 300 includes a driving mechanism 310 and a material pushing member 320; the driving mechanism 310 is arranged on the outer side of the material guiding bottom plate at the bottom of the material inlet 140, that is, on the side facing away from the material inlet 140. The material pushing member 320 is arranged on the inner side of the material guiding bottom plate and is in transmission connection with the driving mechanism 310. The driving mechanism 310 is used to drive the material pushing member 320 to move back and forth along the material entry direction on the material inlet 140 to push the material.

[0061] The pushing mechanism can output linear reciprocating motion, thereby driving the pushing member 320 to move back and forth to push the material, so as to push the material accumulated and blocked at the feed port 140 into the shell 110, realize automatic material clearing, and ensure smooth feeding of the feed port 140.

[0062] Furthermore, the length of the pusher 320 is consistent with the width of the guide bottom plate, thereby ensuring a wider range when pushing materials and avoiding a dead angle for pushing materials. Optionally, the pusher 320 is a plate structure, and the two ends of the pusher 320 are respectively connected to the telescopic ends of the driving mechanism 310.

[0063] Optionally, the drive mechanism 310 includes an electric push rod, an electric cylinder, an oil cylinder, an air cylinder, a linear motor or a screw motor. It should be understood that the above is only an example and is not intended to limit the scope of protection of this application.

[0064] Please also read Figure 3 The cleaning module 300 further includes a travel detector 330 electrically connected to the controller 500. The travel detector 330 is disposed on the driving mechanism 310 and is used to detect the pushing travel of the pushing member 320. The driving travel of the driving mechanism 310 can also be detected.

[0065] Optionally, the travel detector 330 may be a travel switch, a displacement sensor or a proximity switch, etc. It should be understood that the above is only an example and is not intended to limit the scope of protection of the present application.

[0066] In this embodiment, the discharge end of the feeding module 400 corresponds to the feed port 140 and is provided with a sealing cover 160. It can be understood that the material conveyed by the feeding module 400 may be finer particles or powdery materials, which will generate more dust when falling into the feed port 140. Therefore, the sealing cover 160 can effectively prevent the dust from overflowing and may also prevent the material from splashing around.

[0067] Optionally, the feeding module 400 is a belt conveyor or a screw conveyor. It should be understood that the above is only an example and is not intended to limit the scope of protection of this application.

[0068] Embodiment 2

[0069] See also Figure 1 , Figure 2 , Figure 3and Figure 4 This embodiment provides a material blocking prevention control method. The material blocking prevention control method is applied to the material conveying device provided in the above embodiment 1.

[0070] In this embodiment, the anti-blocking material control method includes the following steps:

[0071] S100: Acquire the operating current of the bucket elevator 100.

[0072] S200: When the operating current is less than the first preset current value, the feeding module 400 is controlled to stop feeding and the cleaning module 300 is controlled to perform a material pushing action, until the operating current is greater than the first preset current value, step S300 is executed.

[0073] S300: When the operating current is greater than the first preset current value and less than the second preset current value, the feeding module 400 is controlled to reduce the feeding speed and the cleaning module 300 is controlled to perform the pushing action until the operating current is greater than the second preset current value and less than the operating current of the bucket elevator 100 during safe operation.

[0074] Please also read Figure 5 , wherein in the above step S100, the operating current of the bucket elevator 100 is an average value of multiple groups of currents collected within a preset time interval.

[0075] Specifically, for example, N groups of current data are collected within a time period of t, namely I1, I2, I3, ..., I N Among them, I=(I1+I2+I3……+I N ) / N. It should be noted that the values ​​of time t and N need to be specifically confirmed according to the type of material, and the values ​​of time t and N are different for different materials. Therefore, the values ​​of time t and N are not limited in this embodiment.

[0076] In this example, the first preset current value is set to I N1 , the second preset current value is I N2 The running current of bucket elevator 100 when running without load is I N0 The operating current for safe operation of bucket elevator 100 is I N3 (It can also be understood as the maximum current for safe operation), where I N0 <I N1 <I N2 <I N3 .

[0077] When I<I N1 , I ≥ I N0When the bucket elevator 100 is close to the no-load operation zone, it can be judged that the feed port 140 is seriously blocked or suddenly blocked, and no material is added to the bucket elevator 100 in time. In this way, the operating current of the bucket elevator 100 is less than the first preset current value I N1 , the controller 500 issues a command to stop the feeding module 400 from feeding, and then starts the cleaning module 300. The number of times the cleaning module 300 cleans back and forth can be set in the program to clean up the accumulated materials. The cleaned materials are lifted by the hopper 130 of the bucket elevator 100 and transported out from the discharge port 150. When the accumulated materials are cleaned up, the feeding module 400 is started, and the running speed of the feeding module 400 is gradually increased to a normal value. After the operating current of the bucket elevator 100 returns to normal, the cleaning action of the cleaning module 300 is stopped, and the device operates normally.

[0078] During the material clearing process, the material in the feed inlet 140 also gradually decreases, and the operating current of the bucket elevator 100 gradually returns to stability. Of course, the feed inlet 140 may also gradually change from a state of never being blocked to a state of slowly being blocked. In this way, when the material accumulated in the feed inlet 140 of the bucket elevator 100 slowly increases, the operating current I of the bucket elevator 100 is greater than the first preset current value I N1 , is less than the second preset current value I N2 When the controller 500 sends out a command to reduce the running speed of the feeding module 400, and then starts the cleaning module 300 to clean up the accumulated materials. The number of times the cleaning module 300 cleans back and forth can be set in the program. The cleaned materials are lifted by the hopper 130 and transported out from the discharge port 150. After the operating current value of the bucket elevator 100 is normal, the cleaning action of the cleaning module 300 is stopped, the running speed of the feeding module 400 returns to normal, and the device operates normally.

[0079] It should be noted that after the equipment stops feeding, the controller 500 starts the cleaning module 300 and runs a cycle (moving back and forth along the feeding direction of the feed port 140 once is one cycle) to clean the residual material at the feed port 140. It has a high degree of automation and can replace the manual cleaning work of each shift, reduce work intensity and improve work efficiency.

[0080] The anti-blocking control method provided in this embodiment can judge the severity of the blockage at the feed port 140 by the operating current of the bucket elevator 100. There is no need to arrange other detection elements at the feed port 140, so it is less affected by the working environment. At the same time, the cleaning module 300 is used to realize automatic material pushing and control the operation of the feeding module 400. There is no need to arrange manual shutdown for cleaning. The degree of automation is high, the labor intensity is reduced, the safety is improved, and the normal operation of the equipment and the progress of the operation are guaranteed.

[0081] It should be noted that in the present application, unless otherwise specified, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like used to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] The structure of the bucket elevator 100, the structure of the belt conveyor, and the structure of the screw conveyor are all well known to those skilled in the art, and do not belong to the core improvement part of the present application, so they will not be described here.

[0083] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] 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 conjunction with the embodiment or example are included in at least one embodiment or example of the present application. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A material conveying device, characterized in that: include: The bucket elevator (100) is provided with a feed inlet (140); A current detector (200) is arranged on the bucket elevator (100) and is used to detect the operating current of the bucket elevator (100); A material clearing module (300) is arranged at the bottom of the feed port (140) and is used to push the material along the material entry direction on the feed port (140); A feeding module (400) is arranged on one side of the bucket elevator (100) and is used to convey materials to the feeding port (140); and The controller (500) is configured to control the material cleaning module (300) to perform a material pushing operation and / or control the material feeding operation of the material feeding module (400) according to the operating current.

2. The material conveying device according to claim 1, characterized in that: The material cleaning module (300) comprises: A driving mechanism (310) is arranged on the outer side of the material guiding bottom plate at the bottom of the material inlet (140); and A material pushing member (320) is arranged on the inner side of the material guiding bottom plate and is transmission-connected to the driving mechanism (310). The driving mechanism (310) is used to drive the material pushing member (320) to move back and forth along the material entry direction on the material feed port (140) to push the material.

3. The material conveying device according to claim 2, characterized in that: The material cleaning module (300) further comprises a stroke detector (330) electrically connected to the controller (500); the stroke detector (330) is arranged on the driving mechanism (310) and is used to detect the pushing stroke of the pushing member (320).

4. The material conveying device according to claim 2, characterized in that: The length of the material pushing member (320) is consistent with the width of the material guiding bottom plate.

5. The material conveying device according to claim 2, characterized in that: The driving mechanism (310) comprises an electric push rod, an electric cylinder, an oil cylinder, an air cylinder, a linear motor or a lead screw motor.

6. The material conveying device according to claim 1, characterized in that: The discharge end of the feeding module (400) corresponds to the feed port (140) and is provided with a sealing cover (160).

7. The material conveying device according to claim 1 or 6, characterized in that: The feeding module (400) is a belt conveyor or a screw conveyor.

8. The material conveying device according to claim 1, characterized in that: The current detector (200) comprises a current transformer, and the current transformer is arranged on an incoming cable of a driving motor in the bucket elevator (100).

9. A method for controlling blocking materials, characterized in that: Applied to the material conveying device according to any one of claims 1 to 8, the anti-blocking material control method comprises: S100: obtaining the operating current of the bucket elevator (100); S200: when the operating current is less than a first preset current value, controlling the feeding module (400) to stop feeding and controlling the cleaning module (300) to perform a material pushing action, until the operating current is greater than the first preset current value, executing step S300; S300: When the operating current is greater than the first preset current value and less than the second preset current value, controlling the feeding module (400) to reduce the feeding speed and controlling the cleaning module (300) to perform a material pushing action, until the operating current is greater than the second preset current value and less than the operating current of the bucket elevator (100) when it is in safe operation; The first preset current value is set to I N1 , the second preset current value is I N2 The operating current of the bucket elevator (100) when running at no load is I N0 The operating current for safe operation of the bucket elevator (100) is I N3 , I N0 <I N1 <I N2 <I N3 .

10. The anti-blocking material control method according to claim 9, characterized in that: In step S100, the operating current of the bucket elevator (100) is an average value of multiple groups of currents collected within a preset time interval.

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