Auger control device and method

Abstract

The present invention provides an auger control device and method, which relates to the technical field of engineering machinery. The auger control device includes a speed sensor, a torque detection mechanism, a controller and a driving mechanism; the speed sensor is used to detect the speed data of the auger and transmit it to the controller; the torque detection mechanism is used to detect the torque output value of the driving mechanism and transmit it to the controller; when the auger stops rotating and the torque output value is greater than the output preset value, the controller controls the driving mechanism to drive the auger in the opposite direction. When the auger stops rotating and the torque output value of the driving mechanism is greater than the output preset value, the controller controls the driving mechanism to drive the auger in the opposite direction to rotate, so that a gap is generated between the transported proppant and the auger, reducing resistance, thereby solving the problem of the auger getting stuck. As can be seen from the above, the above-mentioned setting can automatically solve the problem of the auger getting stuck when it gets stuck, avoiding manual processing by the user, and improving the degree of automation.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to an auger control device and method. Background Art

[0002] A sand mixer truck is a device that automatically tracks the fracturing construction process through an automatic control system, thereby achieving automatic control of parameters such as liquid level, additives, density and sand pump discharge pressure, and is capable of mixing, stirring and conveying fracturing media.

[0003] As a key component of the sand mixer, the auger plays the role of conveying proppant during fracturing construction. The variable pump drives the motor to drive the auger to operate; adjusting the displacement of the variable pump can adjust the speed of the auger, thereby achieving the purpose of adjusting the displacement of the auger.

[0004] At present, when the auger is conveying wet proppant or silt sand proppant, due to the large resistance, the auger may be unable to start and operate, that is, it may be stuck. At this time, the auger needs to be started again through the forward and reverse functions.

[0005] However, in the prior art, when the auger is stuck, it needs to be handled manually, and the degree of automation is low. Summary of the invention

[0006] The object of the present invention is to provide an auger control device and method to alleviate the technical problems existing in the prior art that manual processing is required when the auger is stuck and the degree of automation is low.

[0007] The auger control device provided by the present invention includes: a speed sensor, a torque detection mechanism, a controller and a driving mechanism; the driving mechanism is used to drive the auger to rotate; the controller is connected to the speed sensor, the torque detection mechanism and the driving mechanism respectively; the speed sensor is used to detect the speed data of the auger and transmit it to the controller; the torque detection mechanism is used to detect the torque output value of the driving mechanism and transmit it to the controller; when the auger stops rotating and the torque output value is greater than the output preset value, the controller controls the driving mechanism to drive the auger in the opposite direction.

[0008] Furthermore, the torque detection mechanism is a pressure sensor; the driving mechanism includes a variable pump and a motor; the variable pump is used to adjust the rotation speed of the motor; the motor is used to drive the auger to rotate; the pressure sensor is used to detect the pressure data of the variable pump and transmit it to the controller; when the auger stops rotating and the pressure data is greater than the preset pressure value, the controller controls the motor to rotate in the opposite direction.

[0009] Furthermore, the torque detection mechanism is a frequency converter, and the driving mechanism is an electric motor; the electric motor is used to drive the auger to rotate; the frequency converter is used to detect the torque output data of the motor and transmit the torque output data to the controller; when the auger stops rotating and the torque output data is greater than a preset torque output value, the controller controls the motor to rotate in the opposite direction.

[0010] Furthermore, the rotation speed sensor is fixedly connected to the auger.

[0011] Furthermore, the rotation speed sensor is a photoelectric rotation speed sensor.

[0012] Furthermore, the preset pressure value is 40 MPa.

[0013] Furthermore, the auger control device also includes a start-stop switch; the start-stop switch is connected to the driving mechanism; the start-stop switch is used to control the start and stop of the driving mechanism.

[0014] Furthermore, the auger control device also includes a number prompting mechanism; the number prompting mechanism is connected to the controller; the controller can count the number of times the driving mechanism drives the auger in the reverse direction and transmit it to the number prompting mechanism.

[0015] Furthermore, the present invention also provides an auger control method based on the auger control device, comprising the following steps:

[0016] Detect the rotation speed data of the auger;

[0017] Detecting torque output data of the driving mechanism;

[0018] When the auger stops rotating and the torque output data is greater than the output preset value, the auger is controlled to rotate in the opposite direction.

[0019] Furthermore, the auger control method further comprises the following steps:

[0020] Record the number of times the auger rotates in the opposite direction;

[0021] When the number is greater than the preset value, the auger is stopped for inspection.

[0022] In the auger control device provided by the present invention, during use, the drive mechanism gradually increases the torque output, thereby driving the auger to rotate to start normal conveying work. When the speed sensor detects that the auger stops rotating and the torque detection mechanism detects that the torque output value of the drive mechanism is greater than the output preset value, it indicates that the auger is in a stuck state and cannot operate normally. At this time, the controller controls the drive mechanism to drive the auger to rotate in the opposite direction, so that a gap is generated between the transported proppant and the auger, reducing resistance, thereby solving the problem of the auger being stuck.

[0023] From the above, it can be seen that the settings of the speed sensor, the torque detection mechanism and the controller can automatically solve the jamming problem when the auger is stuck, avoiding manual processing by the user and improving the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic structural diagram of an auger control device provided in a first embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of an auger control device provided in a second embodiment of the present invention;

[0027] Figure 3 A schematic structural diagram of an auger control device provided in a third embodiment of the present invention;

[0028] Figure 4 A control logic diagram of an auger control device provided by an embodiment of the present invention;

[0029] Figure 5 A flowchart of the steps of the auger control method provided in an embodiment of the present invention.

[0030] Icons: 1-speed sensor; 2-torque detection mechanism; 3-controller; 4-driving mechanism; 5-auger; 6-pressure sensor; 7-variable pump; 8-motor; 9-frequency converter; 10-electric motor; 11-number prompt mechanism. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1As shown, the auger control device provided by the embodiment of the present invention includes: a speed sensor 1, a torque detection mechanism 2, a controller 3 and a driving mechanism 4; the driving mechanism 4 is used to drive the auger 5 to rotate; the controller 3 is respectively connected to the speed sensor 1, the torque detection mechanism 2 and the driving mechanism 4; the speed sensor 1 is used to detect the speed data of the auger 5, and transmit it to the controller 3; the torque detection mechanism 2 is used to detect the torque output value of the driving mechanism 4, and transmit it to the controller 3; when the auger 5 stops rotating and the torque output value is greater than the output preset value, the controller 3 controls the driving mechanism 4 to drive the auger 5 in the reverse direction.

[0033] The controller 3 may be a PLC controller (programmable logic controller).

[0034] Furthermore, the rotation speed sensor 1 is fixedly connected to the auger 5 .

[0035] Preferably, the speed sensor 1 and the auger 5 are detachably fixedly connected, which makes it convenient for workers to disassemble, assemble and replace them.

[0036] The connection and control methods of the controller 3 with the rotation speed sensor 1 , the torque detection mechanism 2 and the driving mechanism 4 are prior arts and will not be described in detail here.

[0037] When the driving mechanism 4 drives the auger 5 forward, the controller 3 controls the driving mechanism 4 to drive the auger 5 in the reverse direction, that is, the driving mechanism 4 drives the auger 5 in reverse; when the driving mechanism 4 drives the auger 5 in reverse, the controller 3 controls the driving mechanism 4 to drive the auger 5 in the reverse direction, and the driving mechanism 4 drives the auger 5 forward.

[0038] Specifically, the preset value of the torque output is 3288 N·m (Newton-meter).

[0039] Specifically, when the auger 5 is stuck in forward rotation, the controller 3 outputs a one-second reverse rotation signal to control the drive mechanism 4 to drive the auger 5 in the reverse direction, that is, to control the auger 5 to reverse; then the reverse rotation signal is executed again for three seconds to control the drive mechanism 4 to drive the auger 5 in the reverse direction, that is, to control the auger 5 to resume forward rotation. The speed sensor 1 is used to detect the speed of the auger 5. When the speed is greater than 0r / min (revolutions per minute), the auger 5 starts and runs normally. If the speed is equal to 0r / min, the controller 3 repeats the command to rotate in the reverse direction.

[0040] The auger control device provided by the embodiment of the present invention includes: a speed sensor 1, a torque detection mechanism 2, a controller 3 and a driving mechanism 4; the driving mechanism 4 is used to drive the auger 5 to rotate; the controller 3 is connected to the speed sensor 1, the torque detection mechanism 2 and the driving mechanism 4 respectively; the speed sensor 1 is used to detect the speed data of the auger 5 and transmit it to the controller 3; the torque detection mechanism 2 is used to detect the torque output value of the driving mechanism 4 and transmit it to the controller 3; when the auger 5 stops rotating and the torque output value is greater than the output preset value, the controller 3 controls the driving mechanism 4 to drive the auger 5 in the opposite direction. During use, the driving mechanism 4 gradually increases the torque output, thereby driving the auger 5 to rotate to start normal conveying work. When the speed sensor 1 detects that the auger 5 stops rotating and the torque detection mechanism 2 detects that the torque output value of the driving mechanism 4 is greater than the output preset value, it indicates that the auger 5 is in a stuck state and cannot operate normally. At this time, the controller 3 controls the driving mechanism 4 to drive the auger 5 to rotate in the opposite direction, so that a gap is generated between the transported proppant and the auger 5, reducing resistance, thereby completing the problem of the auger 5 being stuck.

[0041] As can be seen from the above, the arrangement of the speed sensor 1, the torque detection mechanism 2 and the controller 3 can automatically handle the jamming problem when the auger 5 is stuck, avoiding manual handling by the user and improving the degree of automation.

[0042] like Figure 2 As shown, on the basis of the above embodiment, further, the torque detection mechanism 2 is a pressure sensor 6; the driving mechanism 4 includes a variable pump 7 and a motor 8; the variable pump 7 is used to adjust the speed of the motor 8; the motor 8 is used to drive the auger 5 to rotate; the pressure sensor 6 is used to detect the pressure data of the variable pump 7 and transmit it to the controller 3; when the auger 5 stops rotating and the pressure data is greater than the preset pressure value, the controller 3 controls the motor 8 to rotate in the opposite direction.

[0043] Wherein, the variable displacement pump 7 can be an oil pump. When the auger 5 works normally, the pressure of the oil pump is 8-10MPa (megapascals).

[0044] Furthermore, the preset pressure value is 40MPa. When the auger 5 is stuck, the pressure of the oil pump can be held back to a maximum pressure of 45MPa; in order to extend the service life of the oil pump, the preset pressure value is set to a value less than 45MPa, that is, set to 40MPa.

[0045] The pressure sensor 6 may be an infrared pressure sensor.

[0046] Specifically, since the variable pump 7 is used to adjust the speed of the motor 8, and the motor 8 is used to drive the auger 5 to rotate, when the pressure data of the variable pump 7 detected by the pressure sensor 6 is greater than the preset pressure value, the torque value of the motor 8 is greater than the preset output value. Therefore, the torque output value of the motor 8 can be measured by measuring the pressure value of the variable pump 7.

[0047] In this embodiment, during use, the variable pump 7 gradually increases the output to increase the speed of the motor 8, and the motor 8 drives the auger 5 to rotate to start normal conveying work. When the speed sensor 1 detects that the auger 5 stops rotating and the pressure sensor 6 detects that the pressure data of the variable pump 7 is greater than the preset pressure value, it indicates that the auger 5 is in a stuck state and cannot operate normally. At this time, the controller 3 controls the motor 8 to drive the auger 5 to rotate in the opposite direction, so that a gap is generated between the transported proppant and the auger 5, reducing the resistance, thereby solving the problem of the auger 5 being stuck.

[0048] like Figure 3 As shown, on the basis of the above embodiment, further, the torque detection mechanism 2 is a frequency converter 9, and the driving mechanism 4 is a motor 10; the motor 10 is used to drive the auger 5 to rotate; the frequency converter 9 is used to detect the torque output data of the motor 10, and transmit the torque output data to the controller 3; when the auger 5 stops rotating and the torque output data is greater than the torque output preset value, the controller 3 controls the motor 10 to rotate in the opposite direction.

[0049] The frequency converter 9 is used to change the working power frequency of the motor 10 , and the frequency converter 9 can display the torque output data of the motor 10 in real time.

[0050] In this embodiment, during use, the motor 10 gradually increases the torque output, thereby driving the auger 5 to rotate to start normal conveying work. When the speed sensor 1 detects that the auger 5 stops rotating and the frequency converter 9 detects that the torque output value of the motor 10 is greater than the output preset value, it indicates that the auger 5 is in a stuck state and cannot operate normally. At this time, the controller 3 controls the motor 10 to drive the auger 5 to rotate in the opposite direction, so that a gap is generated between the transported proppant and the auger 5, reducing resistance, thereby solving the problem of the auger 5 being stuck.

[0051] On the basis of the above embodiment, further, the rotation speed sensor 1 is a photoelectric rotation speed sensor.

[0052] Among them, the photoelectric speed sensor is an angular displacement sensor, which consists of a slit disk mounted on the measured shaft, a light source, a photoelectric device and an indicating slit disk.

[0053] In this embodiment, the photoelectric rotation speed sensor has the advantages of non-contact, high precision, high resolution, high reliability and fast response.

[0054] On the basis of the above embodiment, further, the control device of the auger 5 also includes a start-stop switch; the start-stop switch is connected to the driving mechanism 4; the start-stop switch is used to control the start and stop of the driving mechanism 4.

[0055] In this embodiment, during use, when encountering special circumstances and requiring the auger 5 to be stopped for inspection, the staff can control the start and stop of the driving mechanism 4 through the start-stop switch.

[0056] like Figure 1-Figure 3 As shown, based on the above embodiment, further, the control device of the auger 5 also includes a number prompting mechanism 11; the number prompting mechanism 11 is connected to the controller 3; the controller 3 can count the number of times the driving mechanism 4 drives the auger 5 in the reverse direction, and transmit it to the number prompting mechanism 11.

[0057] The number prompting mechanism 11 may be a display screen, which is connected to the controller 3. Each time the controller 3 controls the driving mechanism 4 to drive the auger 5 in the reverse direction, the number of driving times will be displayed and accumulated on the display screen.

[0058] like Figure 4 As shown, specifically, when the driving mechanism 4 includes a variable pump 7 and a motor 8, and the torque detection mechanism 2 is a pressure sensor 6, the control logic of the auger 5 control device is:

[0059] The controller 3 outputs a control signal to control the output of the variable pump 7. When the speed sensor 1 measures the speed of the auger 5 to be 0 r / min, the controller 3 controls the variable pump 7 to increase the output. The pressure sensor 6 always measures the pressure data of the variable pump 7 in real time, and the speed sensor 1 always measures the speed of the auger 5 in real time. When the pressure data is not greater than the preset value, the controller 3 controls the variable pump 7 to increase the output until the speed of the auger 5 reaches the preset value. If the auger 5 does not get stuck in the middle of the process, it will operate normally until the end of the work. If the pressure data detected by the pressure sensor 6 is greater than the preset value, the controller 3 controls the motor 8 to rotate in the opposite direction, thereby driving the auger 5 to rotate in the opposite direction, the number prompting mechanism 11 counts and prompts once, and then the controller 3 controls the motor 8 to rotate in the opposite direction again; if the cumulative number of counts and prompts is less than five, the controller 3 continues to control the motor 8 to keep the rotation direction unchanged. At this time, when the speed of the auger 5 detected by the speed sensor 1 is greater than 0r / min, it runs normally until the work is completed; if the speed is not greater than 0r / min, the controller 3 repeats the instruction to control the motor 8 to rotate in the opposite direction, and the number prompting mechanism 11 counts and prompts again, and then the controller 3 controls the motor 8 to rotate in the opposite direction again, until the number of counts and prompts accumulates to five times, the step of rotating in the opposite direction is no longer repeated, and the machine is directly stopped for manual inspection to eliminate obstacles.

[0060] The above control logic can realize the automatic control of the auger 5 and the automatic start of the auger if it is stuck.

[0061] In this embodiment, the frequency prompt mechanism 11 can be used to prompt the staff the number of times the driving mechanism 4 drives the auger 5 in the reverse direction, so that the staff can understand in real time how the auger 5 control device handles the auger 5 jam problem.

[0062] like Figure 5 As shown, based on the above embodiment, further, the embodiment of the present invention also provides an auger control method based on the auger control device, comprising the following steps:

[0063] Detect the rotation speed data of the auger 5;

[0064] Detecting torque output data of the driving mechanism 4;

[0065] When the auger 5 stops rotating and the torque output data is greater than the output preset value, the auger 5 is controlled to rotate in the opposite direction.

[0066] In this embodiment, during use, the drive mechanism 4 gradually increases the torque output, thereby driving the auger 5 to rotate to start normal conveying work. When the speed sensor 1 detects that the auger 5 stops rotating and the torque detection mechanism 2 detects that the torque output value of the drive mechanism 4 is greater than the output preset value, it indicates that the auger 5 is in a stuck state and cannot operate normally. At this time, the controller 3 controls the drive mechanism 4 to drive the auger 5 to rotate in the opposite direction, so that a gap is generated between the transported proppant and the auger 5, reducing resistance, thereby solving the problem of the auger 5 being stuck.

[0067] As can be seen from the above, the above-mentioned auger control method can automatically handle the jamming problem when the auger 5 is jammed, avoiding manual handling by the user, thereby improving the degree of automation.

[0068] like Figure 5 As shown, based on the above embodiment, the auger control method further includes the following steps:

[0069] Record the number of times the auger 5 rotates in the opposite direction;

[0070] When the number is greater than the preset value, the auger 5 is stopped for inspection.

[0071] Among them, the preset value of the number of times can be five times.

[0072] In this embodiment, when the number of times the auger 5 rotates in the opposite direction is greater than the preset value, there may be a foreign object entering the auger 5. At this time, there is no need to waste energy and time to rotate in the opposite direction. Instead, the machine can be stopped for inspection directly and switched to manual mode for manual troubleshooting, thereby improving work efficiency.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A auger control device, characterized in that: The auger control device comprises: a speed sensor (1), a torque detection mechanism (2), a controller (3) and a driving mechanism (4); the driving mechanism (4) is used to drive the auger (5) to rotate; the controller (3) is connected to the speed sensor (1), the torque detection mechanism (2) and the driving mechanism (4) respectively; the speed sensor (1) is used to detect the speed data of the auger (5) and transmit it to the controller (3); the torque detection mechanism (2) is used to detect the torque output value of the driving mechanism (4) and transmit it to the controller (3); when the auger (5) stops rotating and the torque output value is greater than the output preset value, the controller (3) controls the driving mechanism (4) to drive the auger (5) in the reverse direction; The auger (5) control device further comprises a frequency prompting mechanism (11); the frequency prompting mechanism (11) is connected to the controller (3); the controller (3) is capable of counting the number of times the driving mechanism (4) drives the auger (5) in the reverse direction, and transmitting the count to the frequency prompting mechanism (11); Recording the number of times the auger (5) performs reverse rotation; when the number is greater than a preset value, stopping the auger (5) for inspection; The torque detection mechanism (2) is a pressure sensor (6); the driving mechanism (4) comprises a variable pump (7) and a motor (8); the variable pump (7) is used to adjust the rotation speed of the motor (8); the motor (8) is used to drive the auger (5) to rotate; the pressure sensor (6) is used to detect pressure data of the variable pump (7) and transmit it to the controller (3); when the auger (5) stops rotating and the pressure data is greater than a preset pressure value, the controller (3) controls the motor (8) to rotate in the opposite direction; The preset pressure value is 40MPa; When the auger is stuck in forward rotation, the controller (3) outputs a reverse rotation signal for one second to control the drive mechanism (4) to drive the auger in the reverse direction, that is, to control the auger to reverse; then the reverse rotation signal is executed again for three seconds to control the drive mechanism (4) to drive the auger in the reverse direction, that is, to control the auger to resume forward rotation. The speed sensor (1) is used to detect the speed of the auger. When the speed is greater than 0r / min (revolutions per minute), the auger starts to run normally. If the speed is equal to 0r / min, the controller (3) repeats the reverse rotation command.

2. The auger control device according to claim 1, characterized in that: The rotation speed sensor (1) is fixedly connected to the auger (5).

3. The auger control device according to claim 1, characterized in that: The rotation speed sensor (1) is a photoelectric rotation speed sensor (1).

4. The auger control device according to claim 1, characterized in that: The auger (5) control device further comprises a start-stop switch; the start-stop switch is connected to the drive mechanism (4); the start-stop switch is used to control the start and stop of the drive mechanism (4).

5. An auger control method based on the auger control device according to any one of claims 1 to 4, characterized in that: The following steps are involved: Detecting the rotation speed data of the auger (5); detecting the torque output data of the driving mechanism (4); When the auger (5) stops rotating and the torque output data is greater than the output preset value, the auger (5) is controlled to rotate in the opposite direction.

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