Pump reversing device, pumping device and method for reversing control thereof

Abstract

The application provides a pumping reversing device, a pumping device and a reversing control method thereof, and the pumping reversing device comprises: a displacement monitoring device installed on a main oil cylinder, the displacement monitoring device is used for monitoring reversing parameter information of a piston assembly arranged correspondingly; a hydraulic control assembly in communication with the first oil cylinder and the second oil cylinder; a controller connected with the displacement monitoring device and the hydraulic control assembly; and a position calibration device arranged on the main oil cylinder and connected with the controller. In the technical scheme of the application, the controller can ensure that the actual reversing position of the main oil cylinder is consistent with the ideal reversing position, thereby ensuring that the piston assembly of the main oil cylinder is reversed at a lubrication point, and the utilization rate of the stroke of the main oil cylinder is improved, and the problems of cylinder collision caused by lagging reversal of the main oil cylinder and easy wear of the piston are avoided, thereby ensuring that the main oil cylinder can work stably and reliably.

Description

Technical Field

[0001] This invention relates to the technical field of main oil pump reversing control equipment, and more specifically, to a pumping reversing device, pumping equipment, and reversing control method thereof. Background Technology

[0002] Currently, when the characteristics of the pumping system change, the stroke of the main cylinder will change. This often results in the main cylinder reversing prematurely, preventing the piston assembly from reaching the lubrication point, which in turn leads to easy piston wear and situations where the cylinder collided due to delayed reversal. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, one object of the present invention is to provide a pumping reversing device.

[0005] Another object of the present invention is to provide a pumping device.

[0006] Another object of the present invention is to provide a commutation control method.

[0007] To achieve the above objectives, embodiments of the present invention provide a pumping reversing device, including a main cylinder, which includes a first cylinder and a second cylinder. The first cylinder includes a first cylinder body and a first piston assembly disposed within the first cylinder body and movable therein. The second cylinder includes a second cylinder body and a second piston assembly disposed within the second cylinder body and movable therein. The pumping reversing device includes: a displacement monitoring device mounted on the main cylinder, used to monitor the reversing parameter information of the piston assembly corresponding to it; a hydraulic control assembly connected to the first and second cylinders; a controller connected to the displacement monitoring device and the hydraulic control assembly; and a position calibration device mounted on the main cylinder and connected to the controller. The controller receives the reversing parameter information transmitted by the displacement monitoring device and controls the hydraulic control assembly to adjust the reversing position of the main cylinder based on the reversing parameter information. The controller also corrects the reversing parameter information of the displacement monitoring device according to the calibration signal of the position calibration device.

[0008] In this technical solution, the controller can calculate the actual reversing position of the main hydraulic cylinder, i.e., the actual reversing position of the piston assembly, based on the reversing parameter information collected by the displacement monitoring device. Then, based on the difference between the actual and theoretical reversing positions and the change in that difference, the controller calculates the reversing position adjustment amount for the main hydraulic cylinder. The reversing position is then adjusted according to this adjustment amount, ensuring that the actual reversing position of the main hydraulic cylinder matches the ideal reversing position. This ensures that the piston assembly of the main hydraulic cylinder reverses at the lubrication point, thereby improving the utilization rate of the main hydraulic cylinder stroke and avoiding problems such as delayed reversing, piston collision, and easy piston wear. This ensures stable and reliable operation of the main hydraulic cylinder. Furthermore, the position calibration device can automatically calibrate the displacement monitoring device. The controller corrects the reversing parameter information of the displacement monitoring device based on the calibration signal, preventing signal drift from the displacement monitoring device from causing control malfunctions. This ensures the controller operates normally and guarantees stable and reliable reversing of the main hydraulic cylinder.

[0009] In addition, the pumping reversing device in the above embodiments provided by the present invention may also have the following additional technical features:

[0010] In the above technical solution, the displacement monitoring device includes a first displacement monitor and a second displacement monitor, wherein the first displacement monitor is installed on the first hydraulic cylinder and the second displacement monitor is installed on the second hydraulic cylinder, and both the first displacement monitor and the second displacement monitor are connected to the controller.

[0011] In this technical solution, since the hydraulic control component is connected to the first and second hydraulic cylinders, the controller can synchronously control the movements of the first and second hydraulic cylinders by controlling the hydraulic control component. The controller only needs to select either the first or second displacement monitor to monitor the operating position of the main hydraulic cylinder, i.e., the operating position of the first and second piston assemblies. Unused monitors can serve as redundancy, ensuring that the displacement monitoring device can operate normally, thereby ensuring that the pump reversing device can operate normally, and ultimately ensuring that the main hydraulic cylinder can reverse normally to meet the pumping requirements on site.

[0012] In any of the above technical solutions, the displacement monitoring device includes a sensing ring and a detection rod. The sensing ring is disposed on the first piston assembly or the second piston assembly, and the detection rod is used to monitor the commutation parameter information of the sensing ring.

[0013] In this technical solution, since the detection rod can monitor the commutation parameter information of the sensing ring, the displacement monitoring device can monitor the commutation parameter information of the corresponding piston assembly, thereby ensuring that the pumping commutation device can work normally.

[0014] In any of the above technical solutions, the displacement monitoring device and the position calibration device are respectively installed on the first oil cylinder and / or the second oil cylinder, and the sensing ring is used to trigger the position calibration device to generate a calibration signal.

[0015] In this technical solution, the position calibration device can automatically calibrate the displacement monitoring device. The controller corrects the commutation parameter information of the displacement monitoring device according to the calibration signal, thereby preventing signal drift of the displacement monitoring device from causing control disorder, and thus ensuring that the controller can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0016] In any of the above technical solutions, the position calibration device includes a first position calibrator and a second position calibrator, wherein the first position calibrator is disposed on the first cylinder body, the second position calibrator is disposed on the second cylinder body, and both the first position calibrator and the second position calibrator are connected to the controller.

[0017] In this technical solution, the first position calibrator can automatically calibrate the first displacement monitor, the second position calibrator can automatically calibrate the second displacement monitor, and the controller corrects the commutation parameter information of the displacement monitoring device according to the calibration signal, thereby preventing signal drift of the displacement monitoring device from causing control disorder, and thus ensuring that the controller can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0018] The second aspect of the present invention provides a pumping device, including a pumping reversing device as described in any of the first aspects of the present invention.

[0019] In this technical solution, the pumping equipment integrates a pumping reversing device, which enables the pumping equipment to reverse direction stably and reliably.

[0020] The third aspect of the present invention provides a reversing control method. The reversing control method utilizes a pumping reversing device as described in any of the first aspects of the technical solution for reversing control. The reversing control method includes the following steps: Step S70: Obtaining the reversing parameter information of the corresponding piston assembly monitored by the displacement monitoring device; Step S80: Calculating the actual reversing position of the main cylinder based on the reversing parameter information of the piston assembly; Step S90: Calculating the difference between the actual reversing position and the ideal reversing position of the main cylinder and the amount of change of the difference; Step S100: Calculating the reversing position adjustment amount of the main cylinder; Step S110: Controlling the hydraulic control component to adjust the reversing position of the main cylinder based on the reversing position adjustment amount.

[0021] In this technical solution, the controller can calculate the actual reversing position of the main hydraulic cylinder, i.e., the actual reversing position of the piston assembly, based on the reversing parameter information collected by the displacement monitoring device. Then, based on the difference between the actual and theoretical reversing positions and the change in that difference, the controller calculates the reversing position adjustment amount for the main hydraulic cylinder. The reversing position is then adjusted according to this adjustment amount, ensuring that the actual reversing position of the main hydraulic cylinder matches the ideal reversing position. This ensures that the piston of the main hydraulic cylinder reverses at the lubrication point, thereby improving the utilization rate of the main hydraulic cylinder stroke and avoiding problems such as delayed reversing, piston collision, and easy piston wear. This ensures stable and reliable operation of the main hydraulic cylinder. Furthermore, the position calibration device can automatically calibrate the displacement monitoring device. The controller corrects the reversing parameter information of the displacement monitoring device based on the calibration signal, preventing signal drift from the displacement monitoring device from causing control malfunctions. This ensures the controller can operate normally, guaranteeing stable and reliable reversing of the main hydraulic cylinder.

[0022] In any of the above technical solutions, the commutation parameter information includes at least one of displacement information and operating speed information.

[0023] In this technical solution, the controller can calculate the actual reversing position of the main hydraulic cylinder, i.e., the actual reversing position of the piston assembly, based on at least one of the displacement information and operating speed information collected by the displacement monitoring device. This ensures that the main hydraulic cylinder can subsequently reverse accurately. This ensures that the piston assembly of the main hydraulic cylinder reverses at the lubrication point, thereby improving the utilization rate of the main hydraulic cylinder stroke and avoiding problems such as delayed reversing and piston wear, thus ensuring that the main hydraulic cylinder can operate stably and reliably.

[0024] In any of the above technical solutions, the displacement monitoring device includes a first displacement monitor and a second displacement monitor. The first displacement monitor is installed on the first hydraulic cylinder, and the second displacement monitor is installed on the second hydraulic cylinder. Before step S70, the reversing control method further includes a determination step S40: whether at least one of the first displacement monitor and the second displacement monitor is working normally; if the determination result is yes, then step S60 is executed; step S60: select one of the first displacement monitor and the second displacement monitor to work or select the displacement monitor that is working normally to work.

[0025] In this technical solution, the controller always selects a properly functioning displacement monitor to operate, thereby ensuring that the controller can receive the reversing parameter information transmitted by the displacement monitor, and thus ensuring that the pump reversing device can accurately control the hydraulic control component to reverse the main cylinder.

[0026] In any of the above technical solutions, the following steps are also included: Step S200: Receive the calibration signal sent by the position calibration device as the piston assembly passes through; Step S210: Correct the commutation parameter information of the displacement monitoring device according to the calibration signal.

[0027] In this technical solution, the position calibration device can automatically calibrate the displacement monitoring device. The controller corrects the commutation parameter information of the displacement monitoring device according to the calibration signal, thereby preventing signal drift of the displacement monitoring device from causing control disorder, and thus ensuring that the controller can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0028] In any of the above technical solutions, step S210 includes: step S211: obtaining the current commutation parameter information of the displacement monitoring device upon receiving the calibration signal; step S212: obtaining the preset displacement information corresponding to the position calibration device based on the calibration signal; determination step S213: determining whether the displacement information of the displacement monitoring device is normal based on the current commutation parameter information and the preset displacement information; if the determination result is negative, then proceed to step S214; step S214: correcting the commutation parameter information of the displacement monitoring device; if the determination result is positive, then proceed to step S215; step S215: not correcting the commutation parameter information of the displacement monitoring device.

[0029] In this technical solution, the position calibration device can automatically calibrate the displacement monitoring device. The controller corrects the commutation parameter information of the displacement monitoring device according to the calibration signal, thereby preventing signal drift of the displacement monitoring device from causing control disorder, and thus ensuring that the controller can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0030] In any of the foregoing technical solutions, additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0031] 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:

[0032] Figure 1 A schematic diagram of the structure of a pumping reversing device according to an embodiment of the present invention is shown;

[0033] Figure 2 A flowchart of a commutation control method according to an embodiment of the present invention is shown;

[0034] Figure 3 It shows Figure 2 Diagram showing the correction steps for commutation parameter information in the commutation control method;

[0035] Figure 4 It shows Figure 3 The specific steps of step S210 are shown in the diagram.

[0036] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0037] 10. First hydraulic cylinder; 12. First cylinder body; 14. First piston assembly; 20. Second hydraulic cylinder; 22. Second cylinder body; 24. Second piston assembly; 30. Displacement monitoring device; 32. First displacement monitor; 34. Second displacement monitor; 50. Hydraulic control assembly; 60. Controller; 70. Position calibration device; 72. First position calibrator; 74. Second position calibrator. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0040] The following reference Figures 1 to 4 A pumping reversing device and a reversing control method according to some embodiments of the present invention are described.

[0041] like Figure 1As shown, the present invention and its embodiments provide a pumping reversing device. The pumping reversing device includes a main cylinder, which includes a first cylinder 10 and a second cylinder 20. The first cylinder 10 includes a first cylinder body 12 and a first piston assembly 14 disposed within the first cylinder body 12 and movable therein. The second cylinder 20 includes a second cylinder body 22 and a second piston assembly 24 disposed within the second cylinder body 22 and movable therein. The pumping reversing device includes a displacement monitoring device 30, a hydraulic control assembly 50, a controller 60, and a position calibration device 70. The displacement monitoring device 30 is mounted on the main cylinder and is used to monitor the reversing parameter information of the piston assembly corresponding to it. The hydraulic control assembly 50 is connected to the first cylinder 10 and the second cylinder 20. The controller 60 is connected to the displacement monitoring device 30 and the hydraulic control assembly 50. The position calibration device 70 is mounted on the main cylinder and connected to the controller 60. The controller 60 is used to receive the reversing parameter information transmitted by the displacement monitoring device 30, and control the hydraulic control component 50 to adjust the reversing position of the main cylinder based on the reversing parameter information. The controller 60 is also used to correct the reversing parameter information of the displacement monitoring device 30 according to the calibration signal of the position calibration device 70.

[0042] In the above configuration, the controller 60 can calculate the actual reversing position of the main cylinder, i.e., the actual reversing position of the piston assembly, based on the reversing parameter information collected by the displacement monitoring device 30. It then calculates the reversing position adjustment amount of the main cylinder based on the difference between the actual and theoretical reversing positions and the change in that difference. The controller adjusts the reversing position of the main cylinder according to this adjustment amount, ensuring that the actual reversing position of the main cylinder matches the ideal reversing position. This ensures that the piston assembly of the main cylinder reverses at the lubrication point, thereby improving the utilization rate of the main cylinder stroke and avoiding problems such as delayed reversing, piston collision, and easy piston wear. This ensures that the main cylinder can operate stably and reliably. Furthermore, the position calibration device 70 can automatically calibrate the displacement monitoring device 30. The controller 60 corrects the reversing parameter information of the displacement monitoring device 30 based on the calibration signal, preventing signal drift from the displacement monitoring device 30 and causing control malfunctions. This ensures that the controller 60 can operate normally, guaranteeing stable and reliable reversing of the main cylinder.

[0043] Specifically, such as Figure 1 As shown, in an embodiment of the present invention, the displacement monitoring device 30 includes a first displacement monitor 32 and a second displacement monitor 34, wherein the first displacement monitor 32 is mounted on the first hydraulic cylinder 10, and the second displacement monitor 34 is mounted on the second hydraulic cylinder 20. Both the first displacement monitor 32 and the second displacement monitor 34 are connected to the controller 60.

[0044] In the above configuration, since the hydraulic control component 50 is connected to the first cylinder 10 and the second cylinder 20, the controller 60 can synchronously control the actions of the first cylinder 10 and the second cylinder 20 by controlling the hydraulic control component 50. The controller 60 only needs to select the first displacement monitor 32 or the second displacement monitor 34 to monitor the operating position of the main cylinder, that is, the operating position of the first piston assembly 14 and the second piston assembly 24. The unused monitors can be used as a redundancy design, so as to ensure that if one displacement monitoring device 30 fails, another displacement monitoring device 30 that is working normally can still be used, thereby ensuring that the pump reversing device can work normally, and thus ensuring that the main cylinder can reverse normally to meet the pumping requirements on site.

[0045] Specifically, in an embodiment of the present invention, the displacement monitoring device 30 includes a sensing ring and a detection rod. The sensing ring is disposed on the first piston assembly 14 or the second piston assembly 24, and the detection rod is used to monitor the commutation parameter information of the sensing ring.

[0046] In the above configuration, since the detection rod can monitor the commutation parameter information of the sensing ring, the displacement monitoring device 30 can monitor the commutation parameter information of the corresponding piston assembly, thereby ensuring that the pumping commutation device can work normally.

[0047] Specifically, such as Figure 1 As shown, in an embodiment of the present invention, the displacement monitoring device 30 and the position calibration device 70 are respectively installed on the first hydraulic cylinder 10 and the second hydraulic cylinder 20, and the sensing ring is used to trigger the position calibration device 70 to generate a calibration signal.

[0048] In the above configuration, the position calibration device 70 can automatically calibrate the displacement monitoring device 30, and the controller 60 corrects the commutation parameter information of the displacement monitoring device 30 according to the calibration signal, thereby preventing the signal drift of the displacement monitoring device 30 from causing control disorder, and thus ensuring that the controller 60 can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0049] Specifically, such as Figure 1 As shown, in an embodiment of the present invention, the position calibration device 70 includes a first position calibrator 72 and a second position calibrator 74, wherein the first position calibrator 72 is disposed on the first cylinder 12 and the second position calibrator 74 is disposed on the second cylinder 22, and both the first position calibrator 72 and the second position calibrator 74 are connected to the controller 60.

[0050] In the above configuration, the first position calibrator 72 can automatically calibrate the first displacement monitor 32, the second position calibrator 74 can automatically calibrate the second displacement monitor 34, and the controller 60 corrects the commutation parameter information of the displacement monitoring device 30 according to the calibration signal, thereby preventing the signal drift of the displacement monitoring device 30 from causing control disorder, and thus ensuring that the controller 60 can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0051] In this embodiment, only one position calibration device 70 is needed under normal circumstances. This position calibration device 70 is set to correspond to the working displacement monitoring device 30, and the other position calibration device 70 is also set as a redundancy.

[0052] The present invention also provides a pumping device, which includes a pumping reversing device as described in any of the embodiments of the first aspect. The pumping device may be, for example, a pump truck, a vehicle-mounted pump, a trailer pump, etc.

[0053] In the above setup, the pumping equipment integrates a pumping reversing device, which enables the pumping equipment to reverse direction stably and reliably.

[0054] like Figures 2 to 4 As shown, the present invention also provides a commutation control method, which utilizes the pumping commutation device of any of the first aspect embodiments for commutation control, and includes the following steps:

[0055] Step S70: Obtain the commutation parameter information of the corresponding piston assembly monitored by the displacement monitoring device;

[0056] Step S80: Calculate the actual reversing position of the main cylinder based on the reversing parameter information of the piston assembly;

[0057] Step S90: Calculate the difference between the actual reversing position and the ideal reversing position of the main hydraulic cylinder, and the amount of change in the difference;

[0058] Step S100: Calculate the reversing position adjustment amount of the main hydraulic cylinder;

[0059] Step S110: Control the hydraulic control component 50 to adjust the reversing position of the main cylinder according to the reversing position adjustment amount.

[0060] Based on the above steps, the controller 60 can calculate the actual reversing position of the main cylinder, i.e., the actual reversing position of the piston assembly, according to the reversing parameter information collected by the displacement monitoring device 30. Then, based on the difference between the actual and theoretical reversing positions and the change in that difference, the controller 60 calculates the reversing position adjustment amount for the main cylinder. The controller then adjusts the reversing position of the main cylinder according to this adjustment amount, ensuring that the actual reversing position of the main cylinder matches the ideal reversing position. This ensures that the piston of the main cylinder reverses at the lubrication point, thereby improving the utilization rate of the main cylinder stroke and avoiding problems such as delayed reversing, piston collision, and easy piston wear. This ensures that the main cylinder can work stably and reliably. Furthermore, the position calibration device 70 can automatically calibrate the displacement monitoring device 30. The controller 60 corrects the reversing parameter information of the displacement monitoring device 30 according to the calibration signal, preventing signal drift from the displacement monitoring device 30 and causing control malfunctions. This ensures that the controller 60 can work normally, guaranteeing stable and reliable reversing of the main cylinder.

[0061] Specifically, such as Figure 2 As shown, in an embodiment of the present invention, the commutation parameter information includes at least one of displacement information and running speed information.

[0062] Based on the above steps, the controller 60 can calculate the actual reversing position of the main hydraulic cylinder, i.e., the actual reversing position of the piston assembly, based on at least one of the displacement information and operating speed information collected by the displacement monitoring device 30. This ensures that the main hydraulic cylinder can subsequently reverse accurately. This ensures that the piston assembly of the main hydraulic cylinder reverses at the lubrication point, thereby improving the utilization rate of the main hydraulic cylinder stroke and avoiding problems such as delayed reversing and piston wear, thus ensuring that the main hydraulic cylinder can operate stably and reliably.

[0063] Specifically, such as Figure 2 As shown, in an embodiment of the present invention, the displacement monitoring device 30 includes a first displacement monitor 32 and a second displacement monitor 34. The first displacement monitor 32 is mounted on the first hydraulic cylinder 10, and the second displacement monitor 34 is mounted on the second hydraulic cylinder 20. Before step S70, the reversing control method further includes a determination step S40: whether at least one of the first displacement monitor and the second displacement monitor is working normally; if the determination result is yes, then step S60 is executed; step S60: select one of the first displacement monitor and the second displacement monitor (both displacement monitors can work normally) to work or select the displacement monitor that is working normally (only one displacement monitor is working normally). If the determination result is no, then step S50 is executed; step S50: perform reversing control on the main hydraulic cylinder according to a fixed displacement and a fixed time.

[0064] According to the above steps, the controller 60 always selects the displacement monitor that is working properly to ensure that the controller 60 can receive the reversing parameter information transmitted by the displacement monitor, thereby ensuring that the pump reversing device can accurately control the hydraulic control component 50 to reverse the main cylinder.

[0065] Specifically, such as Figure 3 As shown, in an embodiment of the present invention, the commutation control method further includes the following steps:

[0066] Step S200: Receive the calibration signal sent by the position calibration device indicating the piston assembly has passed through;

[0067] Step S210: Correct the commutation parameter information of the displacement monitoring device according to the calibration signal.

[0068] According to the above steps, the position calibration device 70 can automatically calibrate the displacement monitoring device 30, and the controller 60 corrects the commutation parameter information of the displacement monitoring device 30 according to the calibration signal, thereby preventing the signal drift of the displacement monitoring device 30 from causing control disorder, and thus ensuring that the controller 60 can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0069] Specifically, such as Figure 4 As shown, in an embodiment of the present invention, step S210 includes:

[0070] Step S211: Obtain the current commutation parameter information of the displacement monitoring device upon receiving the calibration signal;

[0071] Step S212: Obtain the preset displacement information corresponding to the position calibration device based on the calibration signal;

[0072] It should be noted that this preset displacement information is pre-stored in the controller. This preset displacement information includes a standard displacement value. The standard displacement value and the displacement value in the displacement information are calculated based on the same origin. The standard displacement value is the actual displacement of the position calibration device from the origin, which is a fixed value.

[0073] Judgment step S213: Determine whether the displacement information of the displacement monitoring device is normal based on the current commutation parameter information and the preset displacement information; if the judgment result is no, proceed to step S214.

[0074] It should be noted that when the commutation parameter information is the running speed information, the running speed information can be converted into displacement information.

[0075] Step S214: Correct the commutation parameter information of the displacement monitoring device;

[0076] For example, adjustments can be made to displacement information and operating speed information. For instance, after the displacement monitoring device has been running for a period of time, the detected displacement information may deviate. For example, the displacement value in the displacement information may be 1 to 2 mm more or less than the actual displacement value (standard displacement value). In this case, by comparing the displacement value in the displacement information with the standard displacement value in the preset displacement information, it can be determined that the displacement value in the displacement information has deviated. The controller can then correct the displacement information, for example, by decreasing or increasing the displacement value by 1 to 2 mm. If the determination result is yes, then step S215 is executed.

[0077] Step S215: Do not correct the commutation parameter information of the displacement monitoring device.

[0078] According to the above steps, the position calibration device 70 can automatically calibrate the displacement monitoring device 30, and the controller 60 corrects the commutation parameter information of the displacement monitoring device 30 according to the calibration signal, thereby preventing the signal drift of the displacement monitoring device 30 from causing control disorder, and thus ensuring that the controller 60 can work normally, so as to ensure that the main cylinder can commutate stably and reliably.

[0079] The commutation control method of this application has the following advantages:

[0080] 1. The position calibration device 70 performs real-time automatic calibration to prevent displacement sensor signal drift.

[0081] 2. The main cylinder stroke is adjusted by calculating the reversing position adjustment amount through the fuzzy control algorithm of the controller 60. The adjustment is made according to the reversing position adjustment amount to reduce the influence of external factors on the stroke and greatly improve the utilization rate of the main cylinder stroke.

[0082] From the above description, it can be seen that the controller 60 can calculate the actual reversing position of the main cylinder, i.e., the actual reversing position of the piston assembly, based on the reversing parameter information collected by the displacement monitoring device 30. It then calculates the reversing position adjustment amount of the main cylinder based on the difference between the actual and theoretical reversing positions and the change in that difference. The controller adjusts the reversing position of the main cylinder according to this adjustment amount, ensuring that the actual reversing position of the main cylinder matches the ideal reversing position. This ensures that the piston assembly of the main cylinder reverses at the lubrication point, thereby improving the utilization rate of the main cylinder stroke and avoiding problems such as delayed reversing, piston collision, and easy piston wear. This ensures that the main cylinder can work stably and reliably. Furthermore, the position calibration device 70 can automatically calibrate the displacement monitoring device 30. The controller 60 corrects the reversing parameter information of the displacement monitoring device 30 based on the calibration signal, preventing signal drift from the displacement monitoring device 30 and causing control malfunctions. This ensures that the controller 60 can work normally, guaranteeing stable and reliable reversing of the main cylinder.

[0083] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pumping reversing device, comprising a main cylinder, the main cylinder comprising a first cylinder (10) and a second cylinder (20), the first cylinder (10) comprising a first cylinder body (12) and a first piston assembly (14) disposed within the first cylinder body (12) and movable therein, the second cylinder (20) comprising a second cylinder body (22) and a second piston assembly (24) disposed within the second cylinder body (22) and movable therein, characterized in that, The pumping reversing device includes: A displacement monitoring device (30) is installed on the main oil cylinder. The displacement monitoring device (30) is used to monitor the reversing parameter information of the piston assembly corresponding to it. The hydraulic control assembly (50) is connected to the first hydraulic cylinder (10) and the second hydraulic cylinder (20); The controller (60) is connected to the displacement monitoring device (30) and the hydraulic control assembly (50); A position calibration device (70) is mounted on the main cylinder and connected to the controller (60); The controller (60) is used to receive the reversing parameter information transmitted by the displacement monitoring device (30) and control the hydraulic control component (50) to adjust the reversing position of the main cylinder based on the reversing parameter information. The controller (60) is also used to correct the reversing parameter information of the displacement monitoring device (30) according to the calibration signal of the position calibration device (70). The displacement monitoring device (30) includes a first displacement monitor (32) and a second displacement monitor (34), wherein the first displacement monitor (32) is installed on the first hydraulic cylinder (10), and the second displacement monitor (34) is installed on the second hydraulic cylinder (20). Both the first displacement monitor (32) and the second displacement monitor (34) are connected to the controller (60). The controller (60) selects either the first displacement monitor (32) or the second displacement monitor (34) to monitor the operating position of the main cylinder, with the unactivated monitor serving as a redundancy design.

2. The pumping reversing device according to claim 1, characterized in that, The displacement monitoring device (30) includes a sensing ring and a detection rod. The sensing ring is disposed on the first piston assembly (14) or the second piston assembly (24), and the detection rod is used to monitor the commutation parameter information of the sensing ring.

3. The pumping reversing device according to claim 2, characterized in that, The displacement monitoring device (30) and the position calibration device (70) are respectively installed on the first cylinder (10) and / or the second cylinder (20), and the sensing ring is used to trigger the position calibration device (70) to generate a calibration signal.

4. The pumping reversing device according to claim 1, characterized in that, The position calibration device (70) includes a first position calibrator (72) and a second position calibrator (74), wherein the first position calibrator (72) is disposed on the first cylinder (12) and the second position calibrator (74) is disposed on the second cylinder (22), and both the first position calibrator (72) and the second position calibrator (74) are connected to the controller (60).

5. A pumping device, characterized in that, Includes the pumping reversing device as described in any one of claims 1 to 4.

6. A commutation control method, characterized in that, The reversing control method utilizes the pumping reversing device as described in any one of claims 1 to 4 for reversing control, and includes the following steps: Step S70: Obtain the commutation parameter information of the corresponding piston assembly monitored by the displacement monitoring device; Step S80: Calculate the actual reversing position of the main cylinder based on the reversing parameter information of the piston assembly; Step S90: Calculate the difference between the actual reversing position and the ideal reversing position of the main hydraulic cylinder and the amount of change in the difference; Step S100: Calculate the reversing position adjustment amount of the main hydraulic cylinder; Step S110: Control the hydraulic control component (50) to adjust the reversing position of the main cylinder according to the reversing position adjustment amount; The displacement monitoring device (30) includes a first displacement monitor (32) and a second displacement monitor (34). The first displacement monitor (32) is mounted on the first hydraulic cylinder (10), and the second displacement monitor (34) is mounted on the second hydraulic cylinder (20). Before step S70, the reversing control method further includes a determination step S40: Whether at least one of the first displacement monitor and the second displacement monitor is working properly; if the determination result is yes, then proceed to step S60; Step S60: Select one of the first displacement monitor and the second displacement monitor to work, or select the displacement monitor that is working normally.

7. The commutation control method according to claim 6, characterized in that, The commutation parameter information includes at least one of displacement information and running speed information.

8. The commutation control method according to claim 6, characterized in that, It also includes the following steps: Step S200: Receive the calibration signal sent by the position calibration device indicating the piston assembly has passed through; Step S210: Correct the commutation parameter information of the motion monitoring device according to the calibration signal.

9. The commutation control method according to claim 8, characterized in that, Step S210 includes: Step S211: Upon receiving the calibration signal, obtain the current commutation parameter information of the displacement monitoring device; Step S212: Obtain the preset displacement information corresponding to the position calibration device based on the calibration signal; Determination step S213: Determine whether the displacement information of the displacement monitoring device is normal based on the current reversing parameter information and the preset displacement information; if the determination result is no, proceed to step S214. Step S214: Correct the commutation parameter information of the displacement monitoring device; If the determination result is yes, then proceed to step S215; Step S215: Do not correct the commutation parameter information of the motion monitoring device.

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