A crushing anti-blocking control method, a crusher, a control device and a storage medium

Abstract

The application discloses a kind of broken anti-blocking control method and breaker, control device, storage medium, comprising: detection operating current and operating speed, wherein the operating speed is the rotational speed of the cutter shaft of breaker, and the operating current is the current for driving the cutter shaft to rotate;When operating current does not satisfy current threshold condition and operating speed does not satisfy speed threshold condition, control cutter shaft to perform multiple repeated shearing actions, wherein each of the repeated shearing actions includes first controlling the cutter shaft to reverse rotation for a first stroke, then controlling the cutter shaft to forward rotation for a second stroke, and the second stroke is greater than the first stroke;When cutter shaft performs repeated shearing action, continuously detect operating current and operating speed, when operating current satisfies current threshold condition or operating speed satisfies speed threshold condition, control cutter shaft to forward rotation;The design reasonably controls the operation of the breaker, reduces the probability of needing manual intervention, improves the crushing efficiency, and reduces the risk of damage.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment control technology, and in particular to a crushing anti-blocking control method, as well as a crusher, control device, and storage medium. Background Technology

[0002] A crusher can crush materials to the required size. This is achieved by using a cutter shaft to drive the crushing blades to perform a shearing motion, thereby crushing the material. However, factors such as the size, hardness, toughness, and porosity of the material are highly random. For some materials, the crushing blades cannot crush them properly, which can easily cause the cutter shaft to stall. During this process, the operating current driving the cutter shaft will increase. If the cutter shaft is forced to rotate continuously, the sustained high current operation can easily cause internal components to burn out.

[0003] Therefore, existing crushers immediately notify staff to intervene manually after the current increases. However, during the actual operation of the crusher, the current fluctuates constantly, which means that staff need to check frequently when encountering materials that are slightly larger or harder. At the same time, the crusher does not have a good way to crush such materials. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a crushing anti-blocking control method, a crusher, a control device, and a storage medium, which rationally controls the operation of the crusher, reduces the need for manual intervention, improves crushing efficiency, and reduces the risk of damage.

[0005] A crushing anti-blocking control method according to a first aspect of the present invention includes: detecting operating current and operating speed, wherein the operating speed is the rotational speed of the cutter shaft of the crusher, and the operating current is the current driving the cutter shaft to rotate; when the operating current does not meet a current threshold condition and the operating speed does not meet a speed threshold condition, controlling the cutter shaft to perform multiple repetitive shearing actions, wherein each repetitive shearing action includes first controlling the cutter shaft to rotate in the reverse direction for a first stroke, and then controlling the cutter shaft to rotate in the forward direction for a second stroke, and the second stroke is greater than the first stroke; continuously detecting the operating current and operating speed while the cutter shaft performs the repetitive shearing action, and controlling the cutter shaft to rotate in the forward direction when the operating current meets the current threshold condition or the operating speed meets the speed threshold condition.

[0006] A method for preventing breakage and blockage according to an embodiment of the present invention has at least the following beneficial effects:

[0007] This invention's anti-blocking control method for crushing utilizes two parameters—operating current and operating speed—as judgment conditions. Only when the operating current and operating speed do not meet the current threshold and speed threshold conditions is the cutter shaft triggered to perform repeated shearing actions. This reduces the possibility of misjudgment leading to continuous triggering of repeated shearing actions and a decrease in crushing efficiency. When encountering materials with large volume, high hardness, and strong toughness, multiple repeated shearing actions are triggered. In each repeated shearing action, the cutter shaft is first controlled to rotate in the reverse direction for the first stroke, equivalent to a first retraction stroke, and then controlled to rotate in the forward direction for the second stroke. The reverse rotation prevents the crusher from forcibly shearing the material. Since the second stroke is longer than the first stroke in each repeated shearing action, the crusher attempts to gradually crush the material in each action, ensuring that the operating current does not remain consistently high, reducing the risk of crusher damage. After multiple repeated shearing actions, most of the material is crushed, and the crusher can operate normally without manual intervention. This design rationally controls crusher operation, reduces the need for manual intervention, improves crushing efficiency, and reduces the risk of damage.

[0008] According to some embodiments of the present invention, the current threshold condition includes a current change threshold, wherein the amount of change in the working current is derived from the working current; if the amount of change in the working current is greater than the current change threshold, the working current does not meet the current threshold condition; if the amount of change in the working current is less than or equal to the current change threshold, the working current meets the current threshold condition. Alternatively, the current threshold condition includes a current magnitude threshold; if the working current is greater than the current magnitude threshold, the working current does not meet the current threshold condition; if the working current is less than or equal to the current magnitude threshold, the working current meets the current threshold condition.

[0009] According to some embodiments of the present invention, the speed threshold condition includes a speed magnitude threshold. When the operating speed is less than the speed magnitude threshold, the operating speed does not meet the speed threshold condition. When the operating speed is greater than or equal to the speed magnitude threshold, the operating speed meets the speed threshold condition.

[0010] According to some embodiments of the present invention, in two adjacent repeated shearing actions, the first stroke of the reverse rotation of the cutter shaft is equal to the second stroke of the forward rotation of the cutter shaft in the previous repeated shearing action.

[0011] According to some embodiments of the present invention, in each repeated shearing action, a second stroke is set based on a first stroke and a travel angle value, wherein the difference between the second stroke and the first stroke is the travel angle value.

[0012] According to some embodiments of the present invention, when the working current does not meet the current threshold condition and the working speed does not meet the speed threshold condition, the process of controlling the cutter shaft to perform multiple repeated shearing actions further includes: controlling the pusher to reduce the feeding speed, wherein the feeding speed is the speed at which the pusher pushes the material to be crushed to the crushing cutter; and when the working current meets the current threshold condition or the working speed meets the speed threshold condition, controlling the pusher to increase the feeding speed to restore the current speed.

[0013] According to some embodiments of the present invention, the crushing anti-blocking control method further includes: recording the number of anti-blocking crushing operations performed by the control cutter shaft; when the number of anti-blocking crushing operations exceeds the repetition threshold, the operating current still does not meet the current threshold condition, and the operating speed still does not meet the speed threshold condition, controlling the cutter shaft to stop rotating and outputting alarm information.

[0014] According to a second aspect of the present invention, a crusher includes: a cutter shaft for driving crushing cutters to rotate; a drive module connected to the cutter shaft to drive the cutter shaft to rotate; a current detection module for detecting the working current of the drive module driving the cutter shaft to rotate; a speed detection module for detecting the speed of the cutter shaft; and a control module connected to the current detection module, the speed detection module, and the drive module respectively, wherein the control module executes a crushing anti-blocking control method disclosed in any of the above embodiments.

[0015] The crusher according to embodiments of the present invention has at least the following beneficial effects:

[0016] The crusher of the present invention applies the crushing anti-blocking control method disclosed in any of the above embodiments, which reasonably controls the operation of the crusher, reduces the probability of needing manual intervention, improves crushing efficiency, and reduces the risk of damage.

[0017] According to a third aspect of the present invention, the control device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement a breakage and blockage control method disclosed in any of the above embodiments.

[0018] According to a fourth aspect of the present invention, a computer-readable storage medium stores a computer program, characterized in that, when the computer program is executed by a processor, it implements a breakage prevention and blockage control method disclosed in any of the above embodiments.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the principle structure of one embodiment of the crusher of the present invention;

[0022] Figure 2 This is a first flowchart of one embodiment of the control method of the present invention;

[0023] Figure 3 This is a second flowchart of one embodiment of the control method of the present invention;

[0024] Figure 4 This is a schematic diagram of the control device of the present invention, representing one embodiment.

[0025] Figure label:

[0026] Cutter shaft 110; drive module 120; current detection module 210; speed detection module 220; control module 230; pusher 310; alarm module 320; processor 610; memory 620; input / output interface 630; communication interface 640; bus 650. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0031] First, such as Figure 1As shown, the present invention can be applied to a crusher. The crusher typically includes a cutter shaft 110, a drive module 120, a current detection module 210, a speed detection module 220, and a control module 230. The cutter shaft 110 is used to drive the crushing cutter to rotate. The drive module 120 is connected to the cutter shaft 110 to drive the cutter shaft 110 to rotate. The current detection module 210 is used to detect the working current of the drive module 120 driving the cutter shaft 110 to rotate. The speed detection module 220 is used to detect the speed of the cutter shaft 110. The control module 230 is connected to the current detection module 210, the speed detection module 220, and the drive module 120 respectively.

[0032] During rotation, the crushing blade will squeeze and cut the material to be crushed, thereby crushing the material. The drive module 120 may include a motor and a frequency converter. The motor is connected to the cutter shaft 110 to drive the cutter shaft 110 to rotate. The frequency converter is electrically connected to the motor. The control module 230 is connected to the frequency converter. The control module 230 adjusts the appropriate working current through the frequency converter to drive the motor to rotate. It should be noted that when the crushing blade encounters a material with a large volume, high hardness, and strong toughness, the motor will stall, and the working current will increase and the rotation speed will decrease.

[0033] The current detection module 210 can be a conventional resistance sampling circuit used to obtain the operating current of the motor, while the speed detection module 220 can include a Hall sensor or an angular velocity sensor, used to detect the speed of the motor or the cutter shaft 110.

[0034] In addition, the crusher also includes a pusher 310, which can transport the material to be crushed and push it to the crushing cutter for feeding. Specifically, the pusher 310 can include a conveyor belt and a driver that drives the conveyor belt to move. The driver can be a motor or a cylinder, etc. The control module 230 is connected to the pusher 310 so as to control the feeding speed of the pusher 310.

[0035] The crusher can also be equipped with an alarm module 320 electrically connected to the control module 230. The alarm module 320 can output alarm information. The alarm module 320 can include alarm indicator lights or a display screen. The alarm indicator lights can emit different colors of light to indicate the operating status of the crusher. For example, a green light indicates normal operation, while a red light indicates a stall. The display screen can present a human-machine interface, which can display alarm information and also facilitate the input of operating commands for controlling the cutter shaft 110 by the operator.

[0036] A method for preventing breakage and blockage according to a first aspect of the present invention, such as... Figure 2 As shown, it includes:

[0037] S410. Detect the operating current and operating speed, wherein the operating speed is the rotational speed of the cutter shaft 110 of the crusher, and the operating current is the current that drives the cutter shaft 110 to rotate.

[0038] S420. When the working current does not meet the current threshold condition and the working speed does not meet the speed threshold condition, the cutter shaft 110 is controlled to perform multiple repeated shearing actions. Each repeated shearing action includes first controlling the cutter shaft 110 to rotate in the reverse direction for a first stroke, and then controlling the cutter shaft 110 to rotate in the forward direction for a second stroke, and the second stroke is greater than the first stroke.

[0039] S430: When the cutter shaft 110 performs repeated shearing actions, the working current and working speed are continuously monitored. When the working current meets the current threshold condition or the working speed meets the speed threshold condition, the cutter shaft 110 is controlled to rotate in the forward direction.

[0040] It is understandable that for some small but hard materials, the crushing process may cause a momentary increase in the working current, but the rotation speed does not change much. Or for some materials, grinding at a low speed is required, but the working current will not be too high. In all of the above situations, there is no need to perform repeated shearing actions.

[0041] The crushing and anti-blocking control method of the present invention uses two parameters, working current and working speed, as judgment conditions. Only when the working current does not meet the current threshold condition and the working speed does not meet the speed threshold condition will the cutter shaft 110 be triggered to perform repeated shearing action. The reasonable judgment of multiple parameters reduces the situation where misjudgment leads to the continuous triggering of repeated shearing action, resulting in a decrease in crushing efficiency.

[0042] Understandably, when encountering materials with large volume, high hardness, and strong toughness, the operating current increases while the operating speed decreases. At this low operating speed, the material cannot pass through the crushing blades, and the cutter shaft 110 is highly likely to stall. Therefore, multiple repeated shearing actions need to be triggered. In each repeated shearing action, the cutter shaft 110 is first controlled to rotate in the reverse direction for the first stroke, equivalent to retracting the blades for the first stroke. Then, the cutter shaft 110 is controlled to rotate in the forward direction for the second stroke. The reverse rotation prevents the crushing blades from forcibly shearing the material. Since the second stroke is longer than the first stroke in each repeated shearing action, the crushing blades attempt to gradually crush the material in each action, ensuring that the operating current does not remain consistently high, reducing the risk of crusher damage. After multiple repeated shearing actions, most of the material will be crushed, and the crusher can operate normally without manual intervention. This design rationally controls the crusher's operation, reduces the need for manual intervention, improves crushing efficiency, and minimizes the risk of damage.

[0043] In some embodiments of the present invention, the current threshold condition includes a current change threshold. The amount of change in the working current is derived from the working current. If the amount of change in the working current is greater than the current change threshold, the working current does not meet the current threshold condition. If the amount of change in the working current is less than or equal to the current change threshold, the working current meets the current threshold condition.

[0044] It should be noted that the calculation of the change in operating current can be done using 0.1 seconds as the sampling unit time. The change in operating current is calculated by calculating the change in operating current for each sampling unit time. It can be understood that when the operating current increases instantaneously during a certain period, it means that there is a greater probability that the crusher will encounter a difficult material to crush and the crusher will become stuck.

[0045] Alternatively, the current threshold condition includes a current magnitude threshold. When the working current is greater than the current magnitude threshold, the working current does not meet the current threshold condition. When the working current is less than or equal to the current magnitude threshold, the working current meets the current threshold condition. Here, the magnitude of the working current is directly judged. When the working current is greater than the current magnitude threshold, it means that there is a high probability that the crushing tool is crushing a difficult-to-crush material and the crushing tool is stuck.

[0046] Similarly, in some embodiments of the present invention, the rotation speed threshold condition includes a rotation speed magnitude threshold. When the working rotation speed is less than the rotation speed magnitude threshold, the working rotation speed does not meet the rotation speed threshold condition. When the working rotation speed is greater than or equal to the rotation speed magnitude threshold, the working rotation speed meets the rotation speed threshold condition. By judging the working rotation speed, when the working rotation speed is low, it means that there is a greater probability that the crushing tool is crushing a difficult-to-crush material and the crushing tool is stuck.

[0047] In order to improve shearing efficiency and optimize crushing effect, in some embodiments of the present invention, in two adjacent repeated shearing actions, the first stroke of the reverse rotation of the cutter shaft 110 is equal to the second stroke of the forward rotation of the cutter shaft 110 in the previous repeated shearing action.

[0048] After the second stroke of the forward rotation of the cutter shaft 110 in the previous repeated shearing action, the cutter shaft 110 does not need to retract much in the next repeated shearing action. It only needs to reverse the first stroke, which is the same as the second stroke in the previous repeated shearing action. This method can ensure that the crushing cutter is first pulled out from the material to be crushed and has a suitable buffer distance, and then the material to be crushed is gradually crushed, thereby improving the shearing efficiency, shortening the time of multiple repeated shearing actions, and optimizing the crushing effect.

[0049] In some embodiments of the present invention, in each repeated shearing action, a second stroke is set according to a first stroke and a travel angle value, wherein the difference between the second stroke and the first stroke is the travel angle value.

[0050] In each repeated shearing action, the second stroke value of the forward rotation is pushed forward by an angle value more than the first stroke value of the reverse rotation. This ensures that each repeated shearing action cuts the material to be crushed by an appropriate amount of travel, gradually crushing the material.

[0051] In some embodiments of the present invention, the method of controlling the cutter shaft 110 to perform multiple repeated shearing actions when the operating current does not meet the current threshold condition and the operating speed does not meet the speed threshold condition further includes:

[0052] The feeder 310 is controlled to reduce the feeding speed, wherein the feeding speed is the speed at which the feeder 310 pushes the material to be crushed to the crushing cutter; and when the working current meets the current threshold condition or the working speed meets the speed threshold condition, the feeder 310 is controlled to increase the feeding speed to restore it.

[0053] When the operating current does not meet the current threshold condition and the operating speed does not meet the speed threshold condition, it can be determined that the cutter shaft 110 is stalled. At this time, repeated shearing action needs to be performed to reduce the feeding speed of the material to be crushed. This prevents the material behind from continuing to enter the crushing cutter during the repeated shearing action, which would worsen the stalling situation or prevent it from being effectively alleviated. It should be noted that here the feeding speed of the material is reduced, but the feeding of the material does not need to be stopped. This can be achieved by feeding to apply appropriate pressure to the material located at the crushing cutter, so that the material at this position can make full contact with the crushing cutter, making it easier for the crushing cutter to squeeze and shear the material at this position to crush it.

[0054] Specifically, when the operating current does not meet the current threshold condition and the operating speed does not meet the speed threshold condition, the feeder 310 is controlled to reduce from the rated feeding speed to the anti-blocking feeding speed. When the operating current meets the current threshold condition or the operating speed meets the speed threshold condition, the feeder 310 is restored from the anti-blocking feeding speed to the rated feeding speed. The rated feeding speed and the anti-blocking feeding speed can both be set by the operator according to the appropriate situation, and the rated feeding speed is greater than the anti-blocking feeding speed.

[0055] In some embodiments of the present invention, such as Figure 3 As shown, the anti-blocking control method for crushing also includes:

[0056] S510, Record the number of times the control cutter shaft 110 performs repeated shearing actions to prevent blockage and breakage;

[0057] S520 When the number of anti-blocking crushing cycles exceeds the repetition threshold, the working current still does not meet the current threshold condition, and the working speed still does not meet the speed threshold condition, the cutter shaft 110 is controlled to stop rotating and an alarm message is output.

[0058] When the operating current and operating speed do not meet the current threshold condition, the recording starts from the first repeated shearing action. If the situation of the operating current and operating speed not meeting the conditions is not improved after repeated shearing actions, the control cutter shaft 110 stops rotating and outputs an alarm message to prevent damage to various components during repeated shearing actions. Only at this time is it necessary for staff to intervene. Specifically, the threshold for the number of repetitions can be set by the staff, which can be 3 times, 6 times or even more.

[0059] The crusher according to a second aspect embodiment of the present invention, such as Figure 1 As shown, it includes: a cutter shaft 110 for driving the crushing cutter to rotate; a drive module 120 connected to the cutter shaft 110 to drive the cutter shaft 110 to rotate; a current detection module 210 for detecting the working current of the drive module 120 driving the cutter shaft 110 to rotate; a speed detection module 220 for detecting the speed of the cutter shaft 110; and a control module 230 connected to the current detection module 210, the speed detection module 220, and the drive module 120 respectively. The control module 230 executes a crushing anti-blocking control method disclosed in any of the above embodiments.

[0060] The control module 230 can be selected from conventional MCUs or CPUs and their associated circuits.

[0061] The crusher of the present invention applies the crushing anti-blocking control method disclosed in any of the above embodiments, which reasonably controls the operation of the crusher, reduces the probability of needing manual intervention, improves crushing efficiency, and reduces the risk of damage.

[0062] According to a third aspect of the present invention, the control device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement a breakage and blockage control method disclosed in any of the above embodiments.

[0063] The control device can be any intelligent terminal, including a central computer, a remote equipment terminal computer, or any other intelligent terminal.

[0064] like Figure 3 As shown, Figure 3 The hardware structure of a control device according to another embodiment is also illustrated. The control device includes:

[0065] The processor 610 can be implemented using a general-purpose central processing unit (CPU), a microprocessor 610, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0066] The memory 620 can be implemented as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 620 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 620 and called and executed by the processor 610 to implement a breakage prevention and blockage control method according to an embodiment of this application.

[0067] The input / output interface 630 is used to realize information input and output;

[0068] The communication interface 640 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0069] Bus 650 transmits information between various components of the device (e.g., processor 610, memory 620, input / output interface 630, and communication interface 640);

[0070] The processor 610, memory 620, input / output interface 630 and communication interface 640 are connected to each other within the device via bus 650.

[0071] According to a fourth aspect of the present invention, a computer-readable storage medium stores a computer program, characterized in that, when executed by a processor, the computer program implements a breakage prevention and blockage control method disclosed in any of the above embodiments.

[0072] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0073] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0074] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0075] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0076] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0077] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0078] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for preventing breakage and blockage, characterized in that, include: The operating current and operating speed are detected, wherein the operating speed is the rotational speed of the cutter shaft of the crusher, and the operating current is the current that drives the cutter shaft to rotate; When the operating current does not meet the current threshold condition and the operating speed does not meet the speed threshold condition, the cutter shaft is controlled to perform multiple repeated shearing actions. Each repeated shearing action includes first controlling the cutter shaft to rotate in the reverse direction for a first stroke, and then controlling the cutter shaft to rotate in the forward direction for a second stroke, and the second stroke is greater than the first stroke. The working current and working speed are continuously monitored when the cutter shaft performs repeated shearing actions. When the working current meets the current threshold condition or the working speed meets the speed threshold condition, the cutter shaft is controlled to rotate in the forward direction. In two consecutive repeated shearing actions, the first stroke of the cutter shaft rotating in the opposite direction is equal to the second stroke of the cutter shaft rotating in the forward direction in the previous repeated shearing action; In each repeated cutting motion, the second stroke is set based on the first stroke and the travel angle value, where the difference between the second stroke and the first stroke is the travel angle value; The method of controlling the cutter shaft to perform multiple repetitive shearing actions when the operating current does not meet the current threshold condition and the operating speed does not meet the speed threshold condition also includes: The feeder is controlled to reduce the feeding speed without stopping the feeding of material, wherein the feeding speed is the speed at which the feeder pushes the material to be crushed to the crushing blade; Furthermore, when the operating current meets the current threshold condition or the operating speed meets the speed threshold condition, the feeder is controlled to increase the feeding speed to recover.

2. The crushing and anti-blocking control method according to claim 1, characterized in that: The current threshold condition includes a current change threshold. The amount of change in the working current is derived from the working current. If the amount of change in the working current is greater than the current change threshold, the working current does not meet the current threshold condition. If the amount of change in the working current is less than or equal to the current change threshold, the working current meets the current threshold condition. Alternatively, the current threshold condition may include a current magnitude threshold. If the operating current is greater than the current magnitude threshold, the operating current does not meet the current threshold condition. If the operating current is less than or equal to the current magnitude threshold, the operating current meets the current threshold condition.

3. The crushing and anti-blocking control method according to claim 1, characterized in that: The speed threshold condition includes a speed magnitude threshold. When the operating speed is less than the speed magnitude threshold, the operating speed does not meet the speed threshold condition. When the operating speed is greater than or equal to the speed magnitude threshold, the operating speed meets the speed threshold condition.

4. The crushing and anti-blocking control method according to claim 1, characterized in that, Also includes: Record the number of times the control cutter shaft performs repeated shearing actions to prevent blockage and breakage; When the number of anti-blocking crushing cycles exceeds the repetition threshold, the operating current still does not meet the current threshold condition, and the operating speed still does not meet the speed threshold condition, the control cutter shaft stops rotating and an alarm message is output.

5. A crusher, characterized in that, include: The cutter shaft is used to drive the crushing cutter to rotate; The drive module is connected to the cutter shaft to drive the cutter shaft to rotate; The current detection module is used to detect the working current of the drive module that drives the cutter shaft to rotate; The rotational speed detection module is used to detect the rotational speed of the tool shaft; The control module is connected to the current detection module, the speed detection module and the drive module respectively, and the control module executes the crushing and anti-blocking control method as described in any one of claims 1-4.

6. A control device, characterized in that: The control device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the crushing and anti-blocking control method according to any one of claims 1 to 4.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the anti-blocking control method for breakage as described in any one of claims 1 to 4.

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