Method for adjusting speed of coal mining machine and related product

Abstract

The invention discloses a method for adjusting the speed of a coal mining machine and a related product. The coal mining machine is operated on a scraper conveyor. The method comprises the steps that in the process that the coal mining machine runs along the scraper conveyor, the current running mileage of the coal mining machine on the scraper conveyor is obtained at any current collection time point in a plurality of collection time points; responding to the situation that the current running mileage is not the maximum running mileage and the minimum running mileage of the coal mining machine on the scraper conveyor, and obtaining the current running current of the scraper conveyor; and whether the speed of the coal mining machine is adjusted or not is determined according to the current operation current and the operation current of the scraper conveyor at the previous collection time point of the current collection time point. According to the scheme, whether the speed of the coal mining machine is adjusted or not can be determined by analyzing the actual operation current of the scraper conveyor, compared with constant-speed operation, invalid electric energy loss and equipment loss of the coal mining machine can be reduced, the operation efficiency of the coal mining machine can be improved, and the field working condition requirements are better met.

Description

Technical Field

[0001] The present invention generally relates to the technical field of speed adjustment of coal mining machines, and more specifically, to a method for adjusting the speed of a coal mining machine, an electronic device, a computer-readable storage medium, and a coal mining machine. Background Art

[0002] In the coal mining working face, the coal mining machine is the executive mechanism of coal mining operation and is widely used in coal mines. The coal mining machine adopts a multi-motor drive mode, and its total installed power varies according to the required working conditions and loads, generally between 500kW-4000kW. With the popularization of intelligent working faces, the frequency conversion drive application of coal mining machines has been very extensive, but there is no mature and accurate solution for the automatic speed regulation operation mechanism of coal mining machines. At present, constant speed operation is adopted, which will cause great power loss of coal mining machines, and their operation efficiency is relatively low.

[0003] In view of this, there is an urgent need to provide a solution for adjusting the speed of the coal mining machine, which is more in line with the requirements of on-site working conditions, can reduce the ineffective power loss and equipment loss of the coal mining machine, and improve the operating efficiency. Summary of the invention

[0004] In order to at least solve one or more of the technical problems mentioned above, the present invention proposes a method for adjusting the speed of a coal mining machine, an electronic device, a computer-readable storage medium, and a coal mining machine in multiple aspects.

[0005] In a first aspect, the present invention provides a method for adjusting the speed of a coal mining machine, wherein the coal mining machine operates on a scraper conveyor, and the method comprises: during the operation of the coal mining machine along the scraper conveyor, obtaining a current running mileage of the coal mining machine on the scraper conveyor at any current acquisition time point among a plurality of acquisition time points; in response to the current running mileage not being the maximum running mileage and the minimum running mileage of the coal mining machine on the scraper conveyor, obtaining a current running current of the scraper conveyor; and determining whether to adjust the speed of the coal mining machine based on the current running current and the running current of the scraper conveyor at a previous acquisition time point of the current acquisition time point.

[0006] In one embodiment, determining whether to adjust the speed of the coal mining machine based on the current operating current and the operating current of the scraper conveyor at a previous collection time point before the current collection time point includes: in response to the current operating current of the scraper conveyor being different from the operating current of the scraper conveyor at a previous collection time point before the current collection time point, determining the current operating speed of the coal mining machine at the current collection time point based on the current operating current; and causing the coal mining machine to operate along the scraper conveyor between the current collection time point and the next collection time point according to the current operating speed.

[0007] In one embodiment, determining the current operating speed of the coal mining machine according to the current operating current includes: determining the current operating speed of the coal mining machine according to the current operating current and a correspondence between a predetermined scraper conveyor operating current and the operating speed of the coal mining machine.

[0008] In one embodiment, the correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine includes the correspondence between the current range of the scraper conveyor and the speed range of the coal mining machine, and determining the current operating speed of the coal mining machine based on the current operating current and the predetermined correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine includes: determining the current range to which the current operating current belongs; and determining the current operating speed of the coal mining machine based on the speed range of the coal mining machine corresponding to the current range to which the current operating current belongs.

[0009] In one embodiment, determining the current operating speed of the coal mining machine includes: calculating the speed mean of the speed interval of the coal mining machine corresponding to the current interval to which the current operating current belongs; and determining the speed mean as the current operating speed of the coal mining machine.

[0010] In one embodiment, the corresponding relationship between the operating current of the scraper conveyor and the operating speed of the coal mining machine is determined based on a fitting curve of the operating current of the scraper conveyor and the operating speed of the coal mining machine.

[0011] In one embodiment, causing the coal mining machine to run along the scraper conveyor between the current collection time point and the next collection time point according to the current operating speed includes: causing the coal mining machine to start from the current operating speed and adjust the speed according to a fitting curve of the operating current of the scraper conveyor and the operating speed of the coal mining machine until the target operating speed of the coal mining machine at the next collection time point is reached.

[0012] In one embodiment, determining whether to adjust the speed of the coal mining machine based on the current operating current and the operating current of the scraper conveyor at a previous acquisition time point before the current acquisition time point also includes: in response to the current operating current of the scraper conveyor being the same as the operating current of the scraper conveyor at a previous acquisition time point before the current acquisition time point, causing the coal mining machine to run along the scraper conveyor between the current acquisition time point and the next acquisition time point according to the operating speed at the previous acquisition time point.

[0013] In one embodiment, after obtaining the current running mileage of the coal shearer on the scraper conveyor at any current collection time point among multiple collection time points, the method includes: in response to the current running mileage being the minimum running mileage of the coal shearer on the scraper conveyor, determining the current running speed of the coal shearer as the predetermined minimum running speed of the coal shearer, so that the coal shearer starts to adjust the speed according to the fitting curve of the running current of the scraper conveyor and the running speed of the coal shearer from the predetermined minimum running speed of the coal shearer between the current collection time point and the next collection time point, until the target running speed of the coal shearer at the next collection time point is reached; in response to the current running mileage being the maximum running mileage of the coal shearer on the scraper conveyor, determining the current running speed of the coal shearer as the predetermined minimum running speed of the coal shearer, so that the coal shearer runs along the scraper conveyor at the predetermined minimum running speed of the coal shearer at the current collection time point.

[0014] In a second aspect, the present invention further provides an electronic device, comprising: a processor configured to execute program instructions; and a memory configured to store the program instructions, so that when the program instructions are loaded and executed by the processor, the processor executes the method described in any embodiment of the first aspect above.

[0015] In a third aspect, the present invention further provides a computer-readable storage medium, in which program instructions are stored. When the program instructions are loaded and executed by a processor, the processor executes the method according to any embodiment of the first aspect.

[0016] In a fourth aspect, the present invention further provides a coal mining machine, comprising the electronic device according to the embodiment of the aforementioned second aspect.

[0017] Through the scheme for adjusting the speed of the coal mining machine provided above, it is possible to determine whether to adjust the speed of the coal mining machine by analyzing the actual operating current of the scraper conveyor. Compared with constant speed operation, this scheme can reduce the ineffective power loss and equipment loss of the coal mining machine and improve its operating efficiency. In addition, this scheme can determine whether to adjust the speed of the coal mining machine only by the operating current of the scraper conveyor, and requires fewer parameters, so that it is more in line with the requirements of on-site working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 An exemplary flow chart illustrating a method for adjusting the speed of a coal mining machine according to some embodiments of the present invention;

[0020] Figure 2 An exemplary flow chart showing a method for adjusting the speed of a coal mining machine according to other embodiments of the present invention;

[0021] Figure 3 An exemplary flow chart showing a method for adjusting the speed of a coal mining machine according to yet other embodiments of the present invention;

[0022] Figure 4 A structural block diagram of an electronic device according to some embodiments of the present invention is shown;

[0023] Figure 5 A structural block diagram of a coal mining machine according to some embodiments of the present invention is shown. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] It should be understood that the terms "include" and "comprising" used in the description and claims of the present invention indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0026] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the claims, the singular forms of "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in the specification of the present invention and the claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0027] As used in this specification and claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0028] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Figure 1 An exemplary flow chart of a method 100 for adjusting the speed of a coal shearer according to some embodiments of the present invention is shown, wherein the coal shearer is operated on a face conveyor.

[0030] like Figure 1 As shown in , the method 100 may include, at step S101, obtaining the current running mileage of the coal shearer on the scraper conveyor at any current collection time point among a plurality of collection time points during the running of the coal shearer along the scraper conveyor. In order to facilitate accurate speed adjustment of the coal shearer, a plurality of collection time points may be set, and the time intervals between the plurality of collection time points may be set as required, for example, 0.5 seconds, 1 second, or 2 seconds, etc.

[0031] In one embodiment, a signal sending module and a signal receiving module can be installed at the front and rear of the scraper conveyor respectively, and the current running mileage of the coal mining machine on the scraper conveyor can be calculated by the signal transmission speed and time between them. For example, an infrared signal sending module is installed at the front of the machine and an infrared signal receiving module is installed at the rear of the machine, or an infrared signal receiving module is installed at the front of the machine and an infrared signal sending module is installed at the rear of the machine. Since the infrared detection module is added in the speed regulation process, the present scheme can have a higher speed regulation accuracy. In addition to the infrared detection module, the present scheme can also use other detection modules, such as a distance measuring device to measure the current running mileage of the coal mining machine on the scraper conveyor.

[0032] It is understandable that the amount of coal or the transportation volume of the scraper conveyor needs to match its operating current, and the operating current of the scraper conveyor is related to the operating speed of the coal mining machine, that is, when the amount of coal or the transportation volume of the scraper conveyor changes, its operating current also needs to change, and the operating speed of the coal mining machine also needs to change. Correspondingly, when the amount of coal or the transportation volume of the scraper conveyor remains unchanged, its operating current does not need to be changed, and the operating speed of the coal mining machine does not need to be changed. In addition, in order to be more efficient when the coal mining machine is subsequently accelerated, when the coal mining machine is at the minimum operating mileage (operation starting point) on the scraper conveyor, the coal mining machine can start at a predetermined minimum operating speed. In order to reduce equipment energy consumption, when the coal mining machine is at the maximum operating mileage (operation end point) on the scraper conveyor, the coal mining machine can also start at a predetermined minimum operating speed.

[0033] Thus, this scheme can determine whether to adjust the speed of the coal mining machine according to whether the current operating current of the scraper conveyor is different from the operating current of the scraper conveyor at the previous acquisition time point of the current acquisition time point at other positions except the maximum operating mileage and the minimum operating mileage of the coal mining machine on the scraper conveyor. Therefore, at step S102, the method 100 can also obtain the current operating current of the scraper conveyor in response to the current operating mileage not being the maximum operating mileage and the minimum operating mileage of the coal mining machine on the scraper conveyor. The current operating current of the scraper conveyor can be fed back by the frequency converter (which can be a frequency converter integrated machine) of the scraper conveyor. Then, at step S103, the method 100 can determine whether to adjust the speed of the coal mining machine according to the current operating current and the operating current of the scraper conveyor at the previous acquisition time point of the current acquisition time point. The operating current of the scraper conveyor at the previous acquisition time point of the current acquisition time point can be stored after acquisition.

[0034] It can be seen that this scheme can determine whether to adjust the speed of the coal mining machine by analyzing the actual operating current of the scraper conveyor. Compared with constant speed operation, this scheme can reduce the ineffective power loss and equipment loss of the coal mining machine and improve its operating efficiency. In addition, this scheme can determine whether to adjust the speed of the coal mining machine only by the operating current of the scraper conveyor, and requires fewer parameters, which is more in line with the requirements of on-site working conditions.

[0035] The following scheme will combine specific embodiments to illustrate the speed adjustment method of the coal mining machine when the current operating current of the scraper conveyor is different from or different from the operating current of the scraper conveyor at a previous collection time point at the current collection time point.

[0036] Figure 2 An exemplary flow chart of a method 200 for adjusting the speed of a coal mining machine according to other embodiments of the present invention is shown.

[0037] like Figure 2As shown in , method 200 may include, at step S201, in response to the current operating current of the scraper conveyor being different from the operating current of the scraper conveyor at a previous collection time point at the current collection time point, determining the current operating speed of the coal mining machine at the current collection time point based on the current operating current.

[0038] In one implementation scenario, the correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine can be determined through historical data, and the current operating speed of the coal mining machine can be determined based on the current operating current and the predetermined correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine.

[0039] In one implementation, the correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine can be determined based on the fitting curve of the operating current of the scraper conveyor and the operating speed of the coal mining machine. When determining the fitting curve, the operating currents of multiple historical scraper conveyors and the corresponding operating speeds of the coal mining machines can be collected, and the parameters of the fitting curve can be determined by performing data fitting based on the two data sets, and finally the fitting curve is obtained. Speed ​​regulation based on the speed determined based on the fitting curve can make the speed regulation process more linear, thereby improving the operating safety of the coal mining machine, and further reducing the electrical shock caused by it during the acceleration and deceleration process, thereby greatly extending the service life of the equipment and reducing costs.

[0040] In one implementation, the correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine may include the correspondence between the current interval of the scraper conveyor and the speed interval of the coal mining machine. In addition, the larger the coal transport capacity of the scraper conveyor, the larger its operating current should be, and the operating speed of the coal mining machine usually needs to be smaller, while the smaller the coal transport capacity of the scraper conveyor, the smaller its operating current should be, and the operating speed of the coal mining machine usually needs to be larger. When the coal transport capacity of the scraper conveyor remains unchanged, its operating current should remain unchanged, and the operating speed of the coal mining machine usually does not need to be changed. Based on this, the operating current of the scraper conveyor and the speed interval of the coal mining machine can be divided into n sub-intervals, respectively, and n can be a positive integer greater than or equal to 2, such as 2, 3, 4 or 5. Taking n=4 as an example, the current range of the four scraper conveyors can be (0-25%]I, (25%-50%]I, (50%-75%]I, (75%-100%]I, I can be the difference between the full load current and the no-load current of the scraper conveyor. In other implementations, the current I can also be other current values. The speed range of the four coal mining machines can be [100%-75%]Vmax, (75%-50%]Vmax, (50%-25%]Vmax, (25%-0]Vmax, Vmax can be the maximum operating speed of the coal mining machine, and the maximum operating speed of the coal mining machine can be determined according to the actual situation on site (such as the height of the coal seam, the conveying capacity of the belt, etc.).

[0041] Based on the above interval division, the current interval (0-25%]I of the scraper conveyor can correspond to the speed interval (100%-75%]Vmax of the coal mining machine, the current interval (25%-50%]I of the scraper conveyor can correspond to the speed interval (75%-50%]Vmax of the coal mining machine, the current interval (50%-75%]I of the scraper conveyor can correspond to the speed interval (50%-25%]Vmax of the coal mining machine, and the current interval (75%-100%]I of the scraper conveyor can correspond to the speed interval (25%-0]Vmax of the coal mining machine.

[0042] Based on the correspondence between the current range of the scraper conveyor and the speed range of the coal mining machine, the current operating speed of the coal mining machine can be determined in the following manner.

[0043] First, determine the current range to which the current operating current belongs. For example, for the current range (0-25%]I of the scraper conveyor listed above corresponds to the speed range (100%-75%]Vmax of the coal mining machine, the current range (25%-50%]I of the scraper conveyor corresponds to the speed range (75%-50%]Vmax of the coal mining machine, the current range (50%-75%]I of the scraper conveyor corresponds to the speed range (50%-25%]Vmax of the coal mining machine, and the current range (75%-100%]I of the scraper conveyor corresponds to the speed range (25%-0]Vmax of the coal mining machine. When the current operating current is 45%I, it is determined to be in (25%-50%]I, and when the current operating current is 77%I, it is determined to be in (75%-100%]I.

[0044] Next, the current operating speed of the coal mining machine can be determined based on the speed range of the coal mining machine corresponding to the current range to which the current operating current belongs. For example, it can be determined that the speed range of the coal mining machine corresponding to the current range of the scraper conveyor to which the current operating current is 45%I is (75%-50%]Vmax, so the current operating speed of the coal mining machine can be determined based on this speed range. Similarly, it can be determined that the speed range of the coal mining machine corresponding to the current range of the scraper conveyor to which the current operating current is 77%I is (25%-0]Vmax, so the current operating speed of the coal mining machine can be determined based on this speed range.

[0045] When determining the current operating speed of the coal mining machine, the speed mean of the speed interval of the coal mining machine corresponding to the current interval to which the current operating current belongs can be calculated, and the speed mean can be determined as the current operating speed of the coal mining machine. The speed mean can be (maximum speed-minimum speed) / 2+minimum speed of the speed interval. For the example of the current operating current being 45%I, since the speed range of the corresponding coal mining machine is (75%-50%]Vmax, its speed average can be 62.5%Vmax, that is, the current operating speed can be 62.5%Vmax; for the example of the current operating current being 77%I, since the speed range of the corresponding coal mining machine is (25%-0]Vmax, its speed average can be 12.5%Vmax, that is, the current operating speed can be 12.5%Vmax. Using the speed average as the operating speed will neither affect production due to too slow speed nor cause damage to other equipment under the coal mining machine due to too fast speed. It can be understood that the speed determination method of using the speed average of the speed range as the current operating speed of the coal mining machine is merely illustrative and not restrictive, and technicians in this field can also select other speeds related to the speed range as the current operating speed of the coal mining machine as needed.

[0046] The speed determination method of this solution only requires the current value, requires fewer parameters, is more in line with on-site working conditions, and can make the speed control device and speed control method simpler.

[0047] Generally, the coal quantity or transportation volume of a scraper conveyor is related to the operating mileage of the scraper conveyor, and the operating mileage of the scraper conveyor corresponds to its operating current. When the operating mileage is 0, the coal quantity or transportation volume is close to 0, and the operating current is generally small. As the operating mileage changes, the coal quantity or transportation volume will also change accordingly, and the operating current of the scraper conveyor will generally change accordingly. Based on this relationship and the current range of the scraper conveyor and the speed range of the coal mining machine mentioned above, this scheme can also segment the operating mileage of the coal mining machine on the scraper conveyor and make it correspond to the current range of the scraper conveyor and the speed range of the coal mining machine, so as to verify whether the operating speed of the coal mining machine is accurate in combination with the operating mileage.

[0048] For the current interval division of the scraper conveyor described above, the running mileage of the coal mining machine on the scraper conveyor can be divided into the following four intervals: (0-25%] L, (25%-50%] L, (50%-75%] L, (75%-100%] L, L can be the maximum running mileage of the coal mining machine on the scraper conveyor. If the coal mining machine runs on the entire length of the scraper of the scraper conveyor, then the maximum running mileage can be the scraper length of the scraper conveyor. Based on this, The current interval (0-25%]I of the scraper conveyor can correspond to the operating mileage interval (0-25%]L, the current interval (25%-50%]I of the scraper conveyor can correspond to the operating mileage interval (25%-50%]L, the current interval (50%-75%]I of the scraper conveyor can correspond to the operating mileage interval (50%-75%]L, and the current interval (75%-100%]I of the scraper conveyor can correspond to the operating mileage interval (75%-100%]L.

[0049] The running mileage of the coal mining machine on the scraper conveyor is an accumulated value. By adjusting the speed of the coal mining machine based on the running speed of the coal mining machine determined by the coal mining machine, the measurement error of the sensor can be reduced compared to adjusting the speed of the coal mining machine according to the running position of the coal mining machine on the scraper conveyor, so that the speed can be adjusted more accurately.

[0050] The above-listed current ranges of the scraper conveyor, the speed ranges of the coal mining machine, and the running mileage ranges of the coal mining machine on the scraper conveyor are all evenly divided. It can be understood that based on different needs or application scenarios, the current ranges of the scraper conveyor, the speed ranges of the coal mining machine, and the running mileage ranges of the coal mining machine on the scraper conveyor can also be unevenly divided. For example, the current range of the scraper conveyor may include (0-50%]I, (50%-80%]I, (80%-100%]I, the running mileage range of the coal mining machine on the scraper conveyor may include (0-35%]L, (35%-50%]L, (50%-100%]L, and the speed range of the coal mining machine may include [100%-50%]Vmax, (50%-20%]Vmax, (20%-0]Vmax.

[0051] The above describes a method for determining the current operating speed of a coal mining machine in combination with a plurality of embodiments. Now, let us return to Figure 2 After determining the current operating speed of the coal mining machine at the current collection time point, at step S202, the method 200 may cause the coal mining machine to run along the scraper conveyor according to the current operating speed between the current collection time point and the next collection time point.

[0052] Since the coal transport capacity of the scraper conveyor is constantly changing, its operating current should also be constantly changing, so the operating speed of the coal mining machine should also change accordingly. Therefore, when adjusting the speed, the coal mining machine can be made to start with the current operating speed as the starting point and adjust the speed according to the fitting curve of the operating current of the scraper conveyor and the operating speed of the coal mining machine until the target operating speed of the coal mining machine at the next acquisition time point is reached. For the case of dividing the current interval and the speed interval, the calculation method of the target operating speed can be similar to the method of calculating the current operating speed, that is, the target operating speed can be the speed mean of the speed interval corresponding to the current interval to which the operating current belongs at the next acquisition time point.

[0053] In order to prevent the constant change in speed from damaging the coal mining machine and affecting its service life, during speed regulation, when the operating current changes within the current range to which it belongs, the coal mining machine can be maintained at a stable speed (for example, the speed average of the speed range corresponding to the current range). When the operating current jumps to another current range, the speed jumps from this speed to the speed average of the speed range corresponding to the other current range and continues to operate.

[0054] For example, when the operating current of the scraper conveyor decreases to the minimum value of its current interval (i.e., the maximum value of the previous current interval), the speed mean of the speed interval corresponding to the previous current interval is determined as the target operating speed of the coal mining machine at the next acquisition time point, and then the coal mining machine is slowly increased from the current operating speed to the target operating speed, and continues to run at the target operating speed.

[0055] Similarly, when the operating current of the scraper conveyor rises to the maximum value of its current interval (i.e. the minimum value of the next current interval), the speed average of the speed interval corresponding to the next current interval is determined as the target operating speed of the coal mining machine at the next acquisition time point, and then the coal mining machine is slowly decelerated from the current operating speed to the target operating speed, and continues to run at the target operating speed.

[0056] Based on this, when the current running mileage x of the coal mining machine on the scraper conveyor (hereinafter referred to as "current running mileage") is within the running mileage range but the current running current y of the scraper conveyor is not within the current range corresponding to the running mileage, the coal mining machine can continue to execute at the running speed of the previous section (current actual running speed) until y reaches the above-mentioned corresponding current range and then runs according to the speed average of the speed range corresponding to the current range.

[0057] The above speed regulation method is illustrated by taking the current range (25%-50%]I of the scraper conveyor, the speed range (75%-50%]Vmax of the coal mining machine, and the corresponding mileage range (25%-50%]L of the scraper conveyor as an example to illustrate the above speed regulation method.

[0058] For example, the current operating current of the scraper conveyor is 40%I, the current actual operating speed of the coal mining machine is 15, and the operating speed 15 is within (75%-50%]Vmax. Assuming it is 60%Vmax, then when the current operating current of the scraper conveyor increases to 50%I, the coal mining machine begins to slowly decelerate until the speed average of (50%-25%]Vmax, that is, 37.5%Vmax, and continues to run at this target operating speed. For example, 37.5%Vmax is 7, and at this time it runs at an operating speed of 7.

[0059] For example, when the current operating current of the scraper conveyor is 53%I, the current actual operating speed of the coal mining machine is 12, and the operating speed 12 is within (50%-25%]Vmax. Assuming it is 43%Vmax, when the current operating current of the scraper conveyor drops to 50%I, the coal mining machine starts to accelerate slowly until the speed average of (75%-50%]Vmax, that is, 62.5%Vmax, and continues to run at this target operating speed. For example, 62.5% Vmax is 17, and it runs at an operating speed of 17 at this time.

[0060] Through the above-mentioned segmented speed regulation process of the coal mining machine, the start-up-acceleration time of the coal mining machine can be extended, thereby reducing the electrical shock when the motor starts, thereby greatly extending the service life of the equipment and reducing costs. In addition, since a delayed deceleration process is set in the deceleration stage of the coal mining machine, it is possible to prevent the coal mining machine from suddenly decelerating and causing speed fluctuations to cause abnormal vibrations, thereby affecting the operation of the coal mining machine.

[0061] The above text describes, in combination with the embodiments, a speed adjustment method for the coal mining machine when the current operating current of the scraper conveyor is different from the operating current of the scraper conveyor at a collection time point before the current collection time point. According to the above text, when the current operating current of the scraper conveyor is the same as the operating current of the scraper conveyor at a collection time point before the current collection time point, there is no need to adjust the speed of the coal mining machine. Therefore, in response to the current operating current of the scraper conveyor being the same as the operating current of the scraper conveyor at a collection time point before the current collection time point, the coal mining machine can be made to run along the scraper conveyor between the current collection time point and the next collection time point according to the operating speed at the previous collection time point.

[0062] The above describes the speed regulation method of the coal shearer when the current running mileage of the coal shearer on the scraper conveyor is not the maximum running mileage and the minimum running mileage of the coal shearer on the scraper conveyor in combination with the embodiment. The speed regulation method of the coal shearer when the current running mileage of the coal shearer on the scraper conveyor is the maximum running mileage and the minimum running mileage of the coal shearer on the scraper conveyor is further described below.

[0063] Figure 3 An exemplary flow chart of a method 300 for adjusting the speed of a coal mining machine according to yet other embodiments of the present invention is shown.

[0064] like Figure 3 As shown in , at step S301, method 300 can obtain the current running mileage of the coal mining machine on the scraper conveyor at any current collection time point among multiple collection time points. The setting method of the collection time point and the collection method of the running mileage can refer to the method of the embodiment described above, and will not be described in detail here.

[0065] Next, at step S302, in response to the above-mentioned current running mileage being the minimum running mileage of the coal mining machine on the scraper conveyor, method 300 can determine that the current running speed of the coal mining machine is the predetermined minimum running speed of the coal mining machine, so that the coal mining machine starts to adjust the speed according to the fitting curve of the running current of the scraper conveyor and the running speed of the coal mining machine from the current collection time point to the next collection time point with the predetermined minimum running speed of the coal mining machine as the starting point, until the target running speed of the coal mining machine at the next collection time point is reached. The calculation method of the target running speed of the coal mining machine at the next collection time point can be calculated by referring to the method described above, which will not be described in detail here.

[0066] The speed regulation method based on the fitting curve has been described in the previous text in conjunction with the embodiment, that is, when the operating current reaches the minimum value of the corresponding current interval, the target operating speed at this time is calculated, so that the coal mining machine is slowly accelerated from the predetermined minimum operating speed to the target operating speed, and continues to operate at this speed. This speed regulation method can make the speed regulation process more linear, thereby improving the operating safety of the coal mining machine, and further reducing the electrical shock caused by it during the acceleration process.

[0067] At step S303, in response to the current running mileage being the maximum running mileage of the coal mining machine on the scraper conveyor, the method 300 may determine that the current running speed of the coal mining machine is the predetermined minimum running speed of the coal mining machine, so that the coal mining machine runs along the scraper conveyor at the predetermined minimum running speed of the coal mining machine at the current collection time point. Since there is no coal mining task at the maximum running mileage, running at the minimum running speed can reduce the ineffective power loss and equipment loss of the equipment, thereby achieving energy saving and consumption reduction.

[0068] It can be understood that the above only describes the method of determining the operating speed and the method of speed regulation by taking the operating current, operating speed and operating mileage into multiple intervals as an example. Based on different application scenarios and requirements, technical personnel in this field may not divide the operating current, operating speed and operating mileage into intervals. For example, they may calculate the corresponding operating current based on the fitting curve according to the change in current and adjust the operating speed in real time.

[0069] Figure 4 A structural block diagram of an electronic device 400 according to some embodiments of the present invention is shown.

[0070] like Figure 4 As shown in , the electronic device 400 of the present application may include a processor 401 and a memory 402, wherein the processor 401 and the memory 402 communicate with each other via a bus 403. The memory 402 stores program instructions executable by the processor 401, and when the program instructions are executed by the processor 401, the device executes the method steps described above in conjunction with the accompanying drawings.

[0071] According to the method for adjusting the speed of the coal mining machine described in the foregoing combined with multiple embodiments, the electronic device 400 of this solution can reduce the ineffective power loss and equipment loss of the coal mining machine and improve its operating efficiency. In addition, the electronic device 400 of this solution is more in line with the needs of on-site working conditions.

[0072] A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium, which, when executed, executes the steps of the above method embodiment.

[0073] Figure 5 A block diagram of a coal mining machine 500 according to some embodiments of the present invention is shown.

[0074] like Figure 5 As shown in the figure, the coal mining machine 500 may include an electronic device 501 described in the foregoing text and the accompanying drawings. The processor 5011, the memory 5012 and the bus 5013 for connecting the two of the electronic device 501 are the same as or similar to the embodiments described in the foregoing text and will not be described in detail here.

[0075] According to the electronic device described in the above embodiment, the coal mining machine 500 of this solution can reduce ineffective power loss and equipment loss, and improve operating efficiency. In addition, the coal mining machine 500 of this solution is more in line with the needs of on-site working conditions.

[0076] Although multiple embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may conceive of many changes, modifications, and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The appended claims are intended to define the scope of protection of the present invention, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A method for regulating the speed of a coal mining machine, wherein the coal mining machine is operated on a scraper conveyor, and the method include: In the process of the coal mining machine running along the scraper conveyor, obtaining the current running mileage of the coal mining machine on the scraper conveyor at any current collection time point among multiple collection time points; In response to the current running mileage not being the maximum running mileage and the minimum running mileage of the coal mining machine on the scraper conveyor, obtaining the current running current of the scraper conveyor; as well as Whether to adjust the speed of the coal mining machine is determined according to the current operating current and the operating current of the scraper conveyor at a previous collection time point before the current collection time point.

2. The method according to claim 1, wherein whether to adjust the speed of the coal mining machine is determined according to the current operating current and the operating current of the scraper conveyor at the previous acquisition time point of the current acquisition time point. include: In response to the current operating current of the scraper conveyor being different from the operating current of the scraper conveyor at a previous acquisition time point at the current acquisition time point, determining the current operating speed of the coal mining machine at the current acquisition time point according to the current operating current; as well as The coal mining machine is caused to run along the scraper conveyor according to the current running speed between the current collection time point and the next collection time point.

3. The method according to claim 2, wherein the current operating speed of the coal mining machine is determined according to the current operating current include: The current operating speed of the coal mining machine is determined according to the current operating current and the correspondence between the predetermined operating current of the scraper conveyor and the operating speed of the coal mining machine.

4. The method according to claim 3, wherein the correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine includes the correspondence between the current interval of the scraper conveyor and the speed interval of the coal mining machine, and the current operating speed of the coal mining machine is determined according to the current operating current and the predetermined correspondence between the operating current of the scraper conveyor and the operating speed of the coal mining machine. include: Determining the current interval to which the current operating current belongs; as well as The current operating speed of the coal shearer is determined according to the speed interval of the coal shearer corresponding to the current interval to which the current operating current belongs.

5. The method of claim 4, wherein the current operating speed of the coal mining machine is determined include: Calculate the speed mean of the speed interval of the coal mining machine corresponding to the current interval to which the current operating current belongs; as well as The speed mean is determined to be the current operating speed of the coal mining machine.

6. The method according to claim 3, wherein the corresponding relationship between the operating current of the scraper conveyor and the operating speed of the coal mining machine is determined based on a fitting curve of the operating current of the scraper conveyor and the operating speed of the coal mining machine.

7. The method according to any one of claims 2 to 6, wherein the coal mining machine is caused to run along the scraper conveyor according to the current running speed between the current collection time point and the next collection time point. include: The coal mining machine starts to adjust its speed according to the fitting curve of the operating current of the scraper conveyor and the operating speed of the coal mining machine with the current operating speed as the starting point, until the target operating speed of the coal mining machine at the next acquisition time point is reached.

8. The method according to claim 1, wherein whether to adjust the speed of the coal mining machine is determined based on the current operating current and the operating current of the scraper conveyor at the previous acquisition time point before the current acquisition time point. include: In response to the fact that the current operating current of the scraper conveyor is the same as the operating current of the scraper conveyor at a previous collection time point before the current collection time point, the coal mining machine runs along the scraper conveyor between the current collection time point and the next collection time point according to the operating speed at the previous collection time point.

9. The method according to claim 1, after obtaining the current running mileage of the coal mining machine on the scraper conveyor at any current collection time point among multiple collection time points, the method include: In response to the current running mileage being the minimum running mileage of the coal shearer on the scraper conveyor, determining the current running speed of the coal shearer as the predetermined minimum running speed of the coal shearer, so that the coal shearer starts to adjust the speed according to the fitting curve of the running current of the scraper conveyor and the running speed of the coal shearer from the current collection time point to the next collection time point with the predetermined minimum running speed of the coal shearer as the starting point, until the target running speed of the coal shearer at the next collection time point is reached; In response to the current running mileage being the maximum running mileage of the coal mining machine on the scraper conveyor, the current running speed of the coal mining machine is determined to be the predetermined minimum running speed of the coal mining machine, so that the coal mining machine can run along the scraper conveyor at the predetermined minimum running speed of the coal mining machine at the current collection time point.

10. An electronic device, include: a processor configured to execute program instructions; as well as A memory configured to store the program instructions, which, when loaded and executed by the processor, causes the processor to perform the method according to any one of claims 1 to 9. 11 . A computer-readable storage medium having program instructions stored therein, which, when loaded and executed by a processor, causes the processor to execute the method according to claim 1 .

12. A coal mining machine comprising the electronic device according to claim 10.

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