A hydraulic system and its control method, device, and equipment

Abstract

This invention provides a hydraulic system and its control method, apparatus, and equipment. By acquiring the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station, when an abnormal working status of the main hydraulic station is detected, a first return oil control can be executed if the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position; and a second return oil control can be executed if the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position. By returning the oil in the main hydraulic station to the main hydraulic station's oil tank and having the backup hydraulic station provide hydraulic power to the hydraulic system, the normal operation of the hydraulic system is ensured. Furthermore, if the working status of the backup hydraulic station is not detected to be abnormal, the main hydraulic station can again provide hydraulic power to the hydraulic system to ensure the normal operation of the hydraulic system.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology, and in particular to a hydraulic system and its control method, device, and equipment. Background Technology

[0002] Throughout the entire production process, many highly integrated small hydraulic control systems play a crucial role, such as the blast furnace cold air venting control system and the top pressure regulation control system.

[0003] These small hydraulic control systems are pre-programmed with controls for valves and hydraulic power, but as equipment ages and maintenance becomes inadequate, problems inevitably arise in the hydraulic power control system. Furthermore, since the hydraulic power control system is indispensable in the entire process control, malfunctions in it often lead to the shutdown or reduced production of the entire process system.

[0004] Therefore, due to the poor robustness of the current hydraulic power control system, the stability and safety of the current production process are not high. Summary of the Invention

[0005] The embodiments of the present invention provide a hydraulic system and its control method, device, and equipment, thereby solving the technical problem of poor robustness of current hydraulic systems.

[0006] In a first aspect, the present invention provides a hydraulic system control method through an embodiment of the present invention, applied to a hydraulic system including a hydraulic cylinder, a main hydraulic station, and a backup hydraulic station; the hydraulic system control method includes: acquiring initial stroke information of the piston of the hydraulic cylinder and the working state of the main hydraulic station; and executing a first return oil control when the working state of the main hydraulic station is detected to be abnormal and the initial stroke information indicates that the piston of the hydraulic cylinder is in the fully open position.

[0007] The first return oil control includes: controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position, and if so, controlling the oil supply line and return oil line of the main hydraulic station to close, and controlling the oil supply line and return oil line of the backup hydraulic station to open.

[0008] Optionally, before closing the oil supply line of the main hydraulic station and the return line of the backup hydraulic station, the method further includes: obtaining real-time liquid level information of the main hydraulic station oil tank, and determining whether the actual liquid level of the main hydraulic station oil tank exceeds the preset upper limit value based on the real-time liquid level information.

[0009] If so, then execute the steps of controlling the oil supply line and return line of the main hydraulic station to close, and controlling the oil supply line and return line of the backup hydraulic station to open.

[0010] Otherwise, the steps of controlling the oil supply line of the main hydraulic station and the return line of the backup hydraulic station to close, and controlling the return line of the main hydraulic station and the supply line of the backup hydraulic station to open shall be performed.

[0011] Optionally, the method further includes: executing a second return oil control when the working state of the main hydraulic station is detected to be abnormal and the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position;

[0012] The second return oil control includes: controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open.

[0013] Optionally, before closing the oil supply line of the main hydraulic station and the return line of the backup hydraulic station, the method further includes: obtaining real-time liquid level information of the main hydraulic station oil tank, and determining whether the actual liquid level of the main hydraulic station oil tank exceeds the preset upper limit value based on the real-time liquid level information.

[0014] If so, then the oil supply line and return line of the main hydraulic station are closed, and the oil supply line and return line of the backup hydraulic station are opened.

[0015] Otherwise, the steps of controlling the oil supply line of the main hydraulic station and the return line of the backup hydraulic station to close, and controlling the return line of the main hydraulic station and the supply line of the backup hydraulic station to open shall be performed.

[0016] Optionally, the second return oil control further includes: after controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open, determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully open position; if so, controlling the oil supply line and the return oil line of the main hydraulic station to close, and controlling the oil supply line and the return oil line of the backup hydraulic station to open.

[0017] Optionally, the method further includes: if an abnormal working state of the main hydraulic station is detected during the movement of the hydraulic cylinder piston from the fully open position to the fully closed position, then the first return oil control is executed in reverse based on the current stroke information.

[0018] Optionally, the method further includes: if an abnormal working state of the main hydraulic station is detected during the movement of the hydraulic cylinder piston from the fully closed position to the fully open position, then the second return oil control is executed in reverse based on the current stroke information.

[0019] Secondly, according to an embodiment of the present invention, a hydraulic system control device is provided for use in a hydraulic system, the hydraulic system including a hydraulic cylinder, a main hydraulic station, and a backup hydraulic station; the hydraulic system control device includes:

[0020] The data acquisition unit is used to acquire the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station;

[0021] The oil return control unit is used to execute the first oil return control when the working state of the main hydraulic station is detected to be abnormal and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position;

[0022] The first return oil control includes: controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open.

[0023] If the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position, then control the oil supply line and return line of the main hydraulic station to close, and control the oil supply line and return line of the backup hydraulic station to open.

[0024] Thirdly, through one embodiment of the present invention, a hydraulic system control device is provided, including a memory, a processor, and code stored in the memory and executable on the processor, wherein the processor executes the code in any of the embodiments of the first aspect.

[0025] Fourthly, through an embodiment of the present invention, a hydraulic system is provided, including a hydraulic cylinder, a main hydraulic station, a backup hydraulic station, and a hydraulic system control device as described in the third aspect, wherein the hydraulic system control device is electrically connected to the electrically controlled valves of the hydraulic cylinder, the main hydraulic station, and the backup hydraulic station, respectively.

[0026] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0027] By acquiring the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station, a first return oil control can be executed when an abnormal working status of the main hydraulic station is detected, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position. This first return oil control includes: closing the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station, and opening the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position; if so, closing the oil supply line and return oil line of the main hydraulic station, and opening the oil supply line and return oil line of the backup hydraulic station. Therefore, in the event of a failure in the main hydraulic station, the oil in the main hydraulic station can be returned to the main hydraulic station's oil tank, and the backup hydraulic station can be switched to provide power to the entire hydraulic system, ensuring the normal operation of the hydraulic system and thus improving its robustness. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the hydraulic system in one embodiment of the present invention;

[0030] Figure 2 This is a flowchart of the hydraulic system control method in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the hydraulic system control device structure in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the hydraulic system control device structure in an embodiment of the present invention. Detailed Implementation

[0033] The embodiments of the present invention provide a hydraulic system and its control method, device, and equipment, thereby solving the technical problem of poor robustness of current hydraulic systems.

[0034] The technical solution provided by the embodiments of the present invention is to solve the above-mentioned technical problems, and the general idea is as follows:

[0035] First, the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station are acquired. This allows for the execution of the first return oil control when an abnormal working status of the main hydraulic station is detected, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position. The first return oil control includes: closing the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station, and opening the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position. If so, the oil supply line and return oil line of the main hydraulic station are closed, and the oil supply line and return oil line of the backup hydraulic station are opened. This allows the oil in the main hydraulic station to flow back to its tank, and switches to the backup hydraulic station to provide power to the entire hydraulic system, ensuring the normal operation of the hydraulic system.

[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0037] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0039] Firstly, through an embodiment of the present invention, the present invention provides a hydraulic system control method that can be applied to hydraulic systems. Please refer to the following... Figure 1 As shown, the hydraulic system may include a hydraulic cylinder 100, a main hydraulic station 101, and a backup hydraulic station 102, with the hydraulic cylinder 100 selectively connected to the main hydraulic station 101 and the backup hydraulic station 102.

[0040] To better monitor the working status of the hydraulic system, a position sensor (not shown) can be installed on the piston of the hydraulic cylinder 100 to continuously acquire the position information of the hydraulic cylinder piston. The hydraulic cylinder 100 can be a double-acting cylinder. It is understood that the hydraulic system control method provided in this embodiment of the invention is also applicable to single-acting cylinders. The following uses a double-acting cylinder as an example, and will not be described in detail here.

[0041] Similarly, in order to control the main hydraulic station 101, a first valve 1011 can be installed in the oil supply line and the oil return line of the main hydraulic station 101. Then, by controlling the first valve 1011, the oil supply line of the main hydraulic station 101 can be opened or closed, and the oil return line of the main hydraulic station 101 can be opened or closed.

[0042] Optionally, the first valve 1011 mentioned above can be a normally open solenoid directional valve, specifically a single-acting two-position normally open hydraulic solenoid directional valve. Both the supply and return lines of the main hydraulic station 101 are equipped with normally open solenoid directional valves, ensuring the priority of the main hydraulic station 101. That is, in the non-faulty state of the main hydraulic station 101, the main hydraulic station 101 prioritizes providing hydraulic power to the entire hydraulic system.

[0043] Similarly, in order to control the standby hydraulic station 102, a second valve 1021 can be installed in the oil supply line and the oil return line of the standby hydraulic station 102. Then, by controlling the second valve 1021, the oil supply line of the standby hydraulic station 102 can be opened or closed, and the oil return line of the standby hydraulic station 102 can be opened or closed.

[0044] Optionally, the second valve 1021 mentioned above can be a normally closed solenoid directional valve, specifically a single-acting two-position normally closed hydraulic solenoid directional valve. Both the supply and return lines of the backup hydraulic station 102 are equipped with normally closed solenoid directional valves, ensuring that the backup hydraulic station 102 can operate normally when necessary. That is, in the event of a failure of the main hydraulic station 101, the backup hydraulic station 102 provides the hydraulic power for the entire hydraulic system.

[0045] In addition, manual ball valves 1022 can be installed on the oil supply line and return line of the backup hydraulic station 102 respectively. The manual ball valves 1022 enhance the controllability of the oil circuit of the backup hydraulic station 102, and can achieve reliable isolation of the backup hydraulic station 102 when the backup hydraulic station 102 or its oil circuit is under maintenance or the main hydraulic station 101 system is completely isolated.

[0046] Finally, in order to effectively limit the hydraulic pressure entering the hydraulic system and ensure that the hydraulic cylinder 100 is not damaged by excessive hydraulic pressure, a pressure reducing valve 1023 can be installed in the oil supply line of the backup hydraulic station 102. In this way, the hydraulic pressure entering the hydraulic cylinder 100 can be ensured to be consistent with the preset value by adjusting the pressure reducing valve, thereby ensuring the normal operation of the hydraulic system.

[0047] Please see as follows Figure 2 As shown, the above-mentioned hydraulic system control method may include the following steps:

[0048] Step S201: Obtain the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station.

[0049] Specifically, the initial stroke information of the hydraulic cylinder piston can be continuously obtained through the aforementioned position sensor. The initial stroke information can correspond to the working state of the main hydraulic station 101, that is, the initial stroke information and the working state of the main hydraulic station 101 can be obtained at the same time.

[0050] Specifically, the working status of the main hydraulic station 101 can be monitored online. The monitored objects can be such as oil pumps, power supply or system pressure. Once one or more monitored objects are abnormal, it indicates that the working status of the main hydraulic station 101 is abnormal.

[0051] Step S202: When the working state of the main hydraulic station is detected to be abnormal and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position, the first return oil control is executed.

[0052] Specifically, when the working state of the main hydraulic station 101 is detected to be abnormal, the position sensor detects that the hydraulic cylinder piston has reached the maximum stroke position, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position.

[0053] It should be noted that at this time, the hydraulic cylinder piston can only receive the closing command.

[0054] When the hydraulic cylinder piston receives the closing command, it continues to execute the closing command until it reaches the fully closed position. This process involves controlling the closing of the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102, as well as controlling the opening of the oil supply line of the backup hydraulic station 102 and the return line of the main hydraulic station 101.

[0055] At this time, the hydraulic cylinder piston completes a full-close position, the main hydraulic station 101 completes oil return, the main hydraulic station 101's oil supply and return lines are closed, and the backup hydraulic station 102's oil supply and return lines are opened, so that the backup hydraulic station 102 can be fully put into use.

[0056] If the closing command is not executed completely in one go, and the hydraulic cylinder piston is not in the fully closed position but remains in an intermediate position, the current stroke position of the hydraulic cylinder piston is recorded. If the hydraulic cylinder piston receives another closing command, the process continues to close the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102, and open the oil supply line of the backup hydraulic station 102 and the return line of the main hydraulic station 101. If the hydraulic cylinder piston receives another opening command, and before the hydraulic cylinder piston reaches its current stroke position again, the steps of controlling the closing of the oil supply line and return line of the main hydraulic station 101 and the opening of the oil supply line and return line of the backup hydraulic station 102 will continue until the hydraulic cylinder piston completes one fully closed position, indicating that the return oil from the main hydraulic station 101 is complete. Controlling the closing of the oil supply line and return line of the main hydraulic station 101 and the opening of the oil supply line and return line of the backup hydraulic station 102 ensures that the backup hydraulic station 102 is fully operational.

[0057] The first return oil control includes: controlling the oil supply line of the main hydraulic station 101 and the return oil line of the backup hydraulic station 102 to close, and controlling the return oil line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 to open; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston has completed a fully closed position, and if so, controlling the oil supply line and the return oil line of the main hydraulic station 101 to close, and controlling the oil supply line and the return oil line of the backup hydraulic station 102 to open.

[0058] As an optional implementation, before closing the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102, the real-time liquid level information of the oil tank of the main hydraulic station 101 can be obtained, and the actual liquid level of the oil tank of the main hydraulic station 101 can be determined based on the real-time liquid level information to see if it exceeds the preset upper limit value.

[0059] If so, the steps of closing the oil supply line and return line of the main hydraulic station 101 and opening the oil supply line and return line of the backup hydraulic station 102 are executed; otherwise, the steps of closing the oil supply line of the main hydraulic station 101 and return line of the backup hydraulic station 102 are executed, and the steps of opening the oil supply line of the main hydraulic station 101 and return line of the backup hydraulic station 102 are executed.

[0060] Specifically, a level sensor (not shown) can be installed in the main hydraulic station 101 oil tank to obtain real-time level information of the main hydraulic station 101 oil tank.

[0061] Once the hydraulic cylinder piston completes a full-closed position, it indicates that the oil tank of the main hydraulic station 101 has finished returning oil, and at this time the hydraulic system is completely powered by the standby hydraulic station 102.

[0062] Similar to the above implementation, when the working state of the main hydraulic station 101 is detected to be abnormal and the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position, the second return oil control is executed.

[0063] Specifically, when the working state of the main hydraulic station 101 is detected to be abnormal, the position sensor detects that the hydraulic cylinder piston has reached the minimum stroke position, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position.

[0064] It should be noted that at this time, the hydraulic cylinder piston can only receive the open command.

[0065] When the hydraulic cylinder piston receives the opening command, it continues to execute the opening command until it reaches the fully open position. This process involves controlling the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 to close, and controlling the oil supply line of the backup hydraulic station 102 and the return line of the main hydraulic station 101 to open.

[0066] At this time, the hydraulic cylinder piston completes a full opening position, the main hydraulic station 101 completes oil return, the main hydraulic station 101's oil supply and return lines are closed, and the backup hydraulic station 102's oil supply and return lines are opened, so that the backup hydraulic station 102 can be fully put into use.

[0067] If the opening command is not executed completely in one go, and the hydraulic cylinder piston is not in the fully open position but remains in an intermediate position, the current stroke position of the hydraulic cylinder piston is recorded. If the hydraulic cylinder piston receives another opening command, the process continues to close the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102, and open the oil supply line of the backup hydraulic station 102 and the return line of the main hydraulic station 101. If the hydraulic cylinder piston receives another closing command, and before the hydraulic cylinder piston reaches its current stroke position again, the steps of controlling the closing of the oil supply line and return line of the main hydraulic station 101 and the opening of the oil supply line and return line of the backup hydraulic station 102 will continue until the hydraulic cylinder piston completes one fully open position, indicating that the return oil from the main hydraulic station 101 is complete. Controlling the closing of the oil supply line and return line of the main hydraulic station 101 and the opening of the oil supply line and return line of the backup hydraulic station ensures that the backup hydraulic station 102 is fully operational.

[0068] The second oil return control includes: controlling the oil supply line of the main hydraulic station 101 and the oil return line of the backup hydraulic station 102 to close, and controlling the oil return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 to open. Optionally, after controlling the oil supply line of the main hydraulic station 101 and the oil return line of the backup hydraulic station 102 to close, and controlling the oil return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 to open, it is determined whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston has completed a fully open position. If so, the oil supply line and the oil return line of the main hydraulic station 101 are controlled to close, and the oil supply line and the oil return line of the backup hydraulic station 102 are controlled to open.

[0069] Correspondingly, before the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 are closed, the real-time liquid level information of the oil tank of the main hydraulic station 101 can be obtained, and the actual liquid level of the oil tank of the main hydraulic station 101 can be determined based on the real-time liquid level information to see if it exceeds the preset upper limit value.

[0070] If so, the oil supply and return lines of the main hydraulic station 101 are closed, and the oil supply and return lines of the backup hydraulic station 102 are opened; otherwise, the steps of closing the oil supply lines of the main hydraulic station 101 and the return lines of the backup hydraulic station 102 are executed, and the steps of opening the oil supply lines of the main hydraulic station 101 and the backup hydraulic station 102 are executed.

[0071] Once the hydraulic cylinder piston completes a full opening position, it indicates that the oil tank of the main hydraulic station 101 has finished returning oil, and at this time the hydraulic system is completely powered by the standby hydraulic station 102.

[0072] It should be noted that during the execution of the first return oil control, the hydraulic cylinder piston moves from the fully open position to the fully closed position. As long as the hydraulic cylinder piston has not completed a full close position, the first return oil control will continue to be executed.

[0073] When an abnormal operating state of the main hydraulic station 101 is detected, and the initial stroke information indicates that the hydraulic cylinder piston is in the middle position. Specifically, when an abnormal operating state of the main hydraulic station 101 is detected, if the position sensor detects that the hydraulic cylinder piston is in the middle position, then the initial stroke information indicates that the hydraulic cylinder piston is in a certain position between the fully closed and fully open stroke, and this middle position is recorded as the initial stroke position.

[0074] It should be noted that when the hydraulic cylinder piston moves between the initial stroke position and the fully open position, the hydraulic cylinder piston can only receive an opening command on the first move; when the hydraulic cylinder piston moves between the initial stroke position and the fully closed position, the hydraulic cylinder piston can only receive a closing command on the first move.

[0075] If the hydraulic cylinder piston moves between the initial stroke position and the fully open position, after the hydraulic cylinder piston receives the opening command, it continues to execute the opening command until the fully open position. This process involves controlling the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 to close, and controlling the oil supply line of the backup hydraulic station 102 and the return line of the main hydraulic station 101 to open.

[0076] At this point, the hydraulic cylinder piston completes one fully open position. Thus, the main hydraulic station 101 completes its oil return cycle between the initial stroke position and the fully open position. Afterward, the hydraulic cylinder piston moves again within this stroke range to close the oil supply and return lines of the main hydraulic station 101, and to open the oil supply and return lines of the backup hydraulic station, so that the backup hydraulic station 102 can be fully put into use.

[0077] If the opening command is not executed completely in one go, and the hydraulic cylinder piston is not in the fully open position but remains in an intermediate position, the current stroke position of the hydraulic cylinder piston is recorded. If the hydraulic cylinder piston receives another opening command, the steps of controlling the closing of the main hydraulic station 101 supply line and the backup hydraulic station 102 return line, and controlling the opening of the backup hydraulic station 102 supply line and the main hydraulic station 101 return line will continue. If the hydraulic cylinder piston receives another closing command, and before the hydraulic cylinder piston reaches its current stroke position again, the steps of controlling the closing of the main hydraulic station 101 supply line and the opening of the backup hydraulic station 102 supply line and return line will continue until the hydraulic cylinder piston completes one fully open position.

[0078] At this point, the hydraulic cylinder piston is in the initial stroke position to the fully open position, and the main hydraulic station 101 has completed its oil return. Afterward, the hydraulic cylinder piston moves again within this stroke range to control the closing of the oil supply and return lines of the main hydraulic station 101, and to control the opening of the oil supply and return lines of the standby hydraulic station 102, so that the standby hydraulic station 102 can be fully put into use.

[0079] If the hydraulic cylinder piston moves between the initial stroke position and the fully closed position, after the hydraulic cylinder piston receives the closing command, it continues to execute the closing command until the fully closed position. This process involves controlling the closing of the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102, and controlling the opening of the oil supply line of the backup hydraulic station 102 and the return line of the main hydraulic station 101.

[0080] At this point, the hydraulic cylinder piston completes one fully closed position. Thus, the piston's movement between the initial stroke position and the fully closed position indicates that the main hydraulic station 101 has completed its oil return cycle. Subsequently, if the hydraulic cylinder piston moves again within this stroke range, the main hydraulic station 101's oil supply and return lines are closed, and the standby hydraulic station 102's oil supply and return lines are opened, so that the standby hydraulic station 102 is fully operational.

[0081] If the closing command is not executed completely in one go, and the hydraulic cylinder piston is not in the fully closed position but remains in an intermediate position, the current stroke position of the hydraulic cylinder piston is recorded. If the hydraulic cylinder piston receives another closing command, the steps of controlling the closing of the main hydraulic station 101 supply line and the backup hydraulic station 102 return line, and controlling the opening of the backup hydraulic station 102 supply line and the main hydraulic station 101 return line will continue. If the hydraulic cylinder piston receives another opening command, and before the hydraulic cylinder piston reaches its current stroke position again, the steps of controlling the closing of the main hydraulic station 101 supply line and the opening of the backup hydraulic station 102 supply line and the return line will continue until the hydraulic cylinder piston completes one fully closed position.

[0082] At this point, the hydraulic cylinder piston is between its initial stroke position and its fully closed position, indicating that the main hydraulic station 101 has completed its oil return process. Afterwards, if the hydraulic cylinder piston moves again within this stroke range, the main hydraulic station 101's oil supply and return lines will be closed, and the backup hydraulic station 102's oil supply and return lines will be opened, so that the backup hydraulic station 102 is fully operational.

[0083] In summary, the main hydraulic station 101 can only return oil after the hydraulic cylinder piston completes one fully open position and one fully closed position. Only then can the standby hydraulic station 102 be fully put into use throughout the entire stroke range.

[0084] If the hydraulic cylinder piston stops moving during the execution of the first return oil control, the first return oil control can be executed in reverse, that is, the oil supply line and return line of the main hydraulic station 101 are closed, and the oil supply line and return line of the backup hydraulic station 102 are opened, so that the backup hydraulic station 102 supplies oil and the oil flows back to the oil tank of the backup hydraulic station 102.

[0085] After the hydraulic cylinder piston is in the fully closed position, the oil supply direction of the standby hydraulic station 102 is changed by the reversing valve between the standby hydraulic station 102 and the hydraulic cylinder 100. At the same time, the oil supply line of the main hydraulic station 101 and the return line of the standby hydraulic station 102 are closed, and the return line of the main hydraulic station 101 and the oil supply line of the standby hydraulic station 102 are opened. In this way, when the standby hydraulic station 102 drives the hydraulic cylinder piston from the fully closed position to the fully open position, the oil in the hydraulic cylinder 100 will continue to replenish the oil tank of the main hydraulic station 101.

[0086] It is easy to understand that, based on the difference between the current stroke information and the initial stroke information, the remaining unrecovered oil volume of the main hydraulic station 101 can be determined. Then, during the reverse execution of the first return oil control, the remaining unrecovered oil volume of the main hydraulic station 101 can be replenished by controlling the stroke of the hydraulic cylinder piston.

[0087] Similarly, during the execution of the second return oil control, the hydraulic cylinder piston moves from the fully closed position to the fully open position. As long as the hydraulic cylinder piston has not completed a full open position, the second return oil control will continue to be executed.

[0088] If the hydraulic cylinder piston stops moving during the execution of the second return oil control, the second return oil control can also be executed in reverse, that is, the oil supply line and return line of the main hydraulic station 101 are closed, and the oil supply line and return line of the backup hydraulic station 102 are opened, so that the backup hydraulic station 102 supplies oil and the oil flows back to the oil tank of the backup hydraulic station 102.

[0089] After the hydraulic cylinder piston is in the fully open position, the oil supply direction of the standby hydraulic station 102 is changed by the reversing valve between the standby hydraulic station 102 and the hydraulic cylinder 100. At the same time, the oil supply line of the main hydraulic station 101 and the return line of the standby hydraulic station 102 are closed, and the return line of the main hydraulic station 101 and the oil supply line of the standby hydraulic station 102 are opened. In this way, when the standby hydraulic station 102 drives the hydraulic cylinder piston from the fully open position to the fully closed position, the oil in the hydraulic cylinder 100 will continue to replenish the oil tank of the main hydraulic station 101.

[0090] It is easy to understand that, based on the difference between the current stroke information and the initial stroke information, the remaining unrecovered oil volume of the main hydraulic station 101 can be determined. Then, during the reverse execution of the second return oil control, the remaining unrecovered oil volume of the main hydraulic station 101 can be replenished by controlling the stroke of the hydraulic cylinder piston.

[0091] Once the main hydraulic station 101 returns to normal operation, for the safety of the hydraulic system, the operator can confirm on-site that the main hydraulic station 101 is operating normally, and then manually trigger the backup hydraulic station 102 to switch to provide hydraulic power to the main hydraulic station 101.

[0092] Since the process of switching from the main hydraulic station 101 to the standby hydraulic station 102 is the reverse of the process of switching from the standby hydraulic station 102 to the main hydraulic station 101, the process of switching from the standby hydraulic station 102 to the main hydraulic station 101 can be referred to the above embodiment. For example, if the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position, then the third return oil control is executed.

[0093] The third oil return control includes: controlling the opening of the oil supply line of the main hydraulic station 101 and the oil return line of the backup hydraulic station 102, and controlling the closing of the oil return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position, and if so, controlling the opening of the oil supply line and the oil return line of the main hydraulic station 101, and controlling the closing of the oil supply line and the oil return line of the backup hydraulic station 102.

[0094] As an optional implementation, before opening the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102, the real-time liquid level information of the oil tank of the main hydraulic station 101 can be obtained, and the actual liquid level of the oil tank of the main hydraulic station 101 can be determined based on the real-time liquid level information.

[0095] If so, the steps of controlling the opening of the oil supply line and return line of the main hydraulic station 101 and controlling the closing of the oil supply line and return line of the backup hydraulic station 102 are executed; otherwise, the steps of controlling the opening of the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 are executed, and the steps of controlling the closing of the return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 are executed.

[0096] As long as the hydraulic cylinder piston is in the fully closed position, it indicates that the oil tank of the backup hydraulic station 102 has finished returning oil, and at this time the hydraulic system is completely powered by the main hydraulic station 101.

[0097] Similarly, if the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position, then the fourth return oil control is executed. The fourth return oil control includes: controlling the opening of the oil supply line of the main hydraulic station 101 and the return oil line of the backup hydraulic station 102, and controlling the closing of the return oil line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102.

[0098] Optionally, after controlling the opening of the oil supply line of the main hydraulic station 101 and the oil return line of the backup hydraulic station 102, and controlling the closing of the oil return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102, it is determined whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position. If so, the oil supply line and oil return line of the main hydraulic station 101 are opened, and the oil supply line and oil return line of the backup hydraulic station 102 are closed.

[0099] Correspondingly, before the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 are opened, the real-time liquid level information of the oil tank of the main hydraulic station 101 can be obtained, and the actual liquid level of the oil tank of the main hydraulic station 101 can be judged based on the real-time liquid level information to determine whether the actual liquid level of the oil tank of the main hydraulic station 101 is lower than the preset lower limit value.

[0100] If so, the oil supply and return lines of the main hydraulic station 101 are opened, and the oil supply and return lines of the backup hydraulic station 102 are closed; otherwise, the steps of opening the oil supply lines of the main hydraulic station 101 and the return lines of the backup hydraulic station 102, and closing the oil supply lines of the main hydraulic station 101 and the backup hydraulic station 102 are executed.

[0101] As long as the hydraulic cylinder piston is in the fully open position, it indicates that the oil tank of the backup hydraulic station 102 has finished returning oil, and at this time the hydraulic system is completely powered by the main hydraulic station 101.

[0102] It should be noted that during the execution of the third return oil control, the hydraulic cylinder piston moves from the fully open position to the fully closed position. As long as the hydraulic cylinder piston does not reach the fully closed position, the third return oil control will continue to be executed.

[0103] If the hydraulic cylinder piston stops moving during the execution of the third return oil control, the third return oil control can be executed in reverse, that is, the oil supply line and return line of the main hydraulic station 101 are opened, and the oil supply line and return line of the backup hydraulic station 102 are closed, so that the main hydraulic station 101 supplies oil and the oil flows back to the oil tank of the main hydraulic station 101.

[0104] After the hydraulic cylinder piston is in the fully closed position, the oil supply direction of the main hydraulic station 101 is changed by the reversing valve between the main hydraulic station 101 and the hydraulic cylinder 100. Simultaneously, the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 are opened, and the return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 are closed. Thus, as the main hydraulic station 101 drives the hydraulic cylinder piston from the fully closed position to the fully open position, the oil in the hydraulic cylinder 100 continues to replenish the oil tank of the main hydraulic station 101.

[0105] Similarly, during the execution of the fourth return oil control, the hydraulic cylinder piston moves from the fully closed position to the fully open position. As long as the hydraulic cylinder piston does not reach the fully open position, the fourth return oil control will continue to be executed.

[0106] If the hydraulic cylinder piston stops moving during the execution of the fourth return oil control, the fourth return oil control can be executed in reverse, that is, the oil supply line and return line of the main hydraulic station 101 are opened, and the oil supply line and return line of the backup hydraulic station 102 are closed, so that the main hydraulic station 101 supplies oil and the oil flows back to the oil tank of the main hydraulic station 101.

[0107] After the hydraulic cylinder piston is in the fully open position, the oil supply direction of the main hydraulic station 101 is changed by the reversing valve between the main hydraulic station 101 and the hydraulic cylinder 100. Simultaneously, the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 are opened, and the return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 are closed. Thus, as the main hydraulic station 101 drives the hydraulic cylinder piston from the fully open position to the fully closed position, the oil in the hydraulic cylinder 100 continues to replenish the oil tank of the main hydraulic station 101.

[0108] Secondly, based on the same inventive concept, the present invention provides a hydraulic system control device through an embodiment of the present invention, which can be applied to the aforementioned hydraulic system.

[0109] Please see as follows Figure 3 As shown, the hydraulic system control device may include:

[0110] The data acquisition unit 301 is used to acquire the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station 101.

[0111] The return oil control unit 302 is used to perform the first return oil control when the working state of the main hydraulic station 101 is detected to be abnormal and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position.

[0112] The first return oil control includes: controlling the oil supply line of the main hydraulic station 101 and the return oil line of the backup hydraulic station 102 to close, and controlling the return oil line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 to open; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position, and if so, controlling the oil supply line and return oil line of the main hydraulic station 101 to close, and controlling the oil supply line and return oil line of the backup hydraulic station 102 to open.

[0113] As an optional implementation, the hydraulic system control device further includes:

[0114] The liquid level monitoring unit 303 is used to acquire real-time liquid level information of the main hydraulic station 101 oil tank and determine whether the actual liquid level of the main hydraulic station 101 oil tank exceeds the preset upper limit value based on the real-time liquid level information. If so, it executes the steps of controlling the oil supply line and return line of the main hydraulic station 101 to close and controlling the oil supply line and return line of the backup hydraulic station 102 to open; otherwise, it executes the steps of controlling the oil supply line of the main hydraulic station 101 and the return line of the backup hydraulic station 102 to close and controlling the return line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 to open.

[0115] As an optional implementation, the oil return control unit 302 is also used for:

[0116] When the working state of the main hydraulic station 101 is detected to be abnormal, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position, the second return oil control is executed.

[0117] The second return oil control includes: controlling the oil supply line of the main hydraulic station 101 and the return oil line of the backup hydraulic station 102 to close, and controlling the return oil line of the main hydraulic station 101 and the oil supply line of the backup hydraulic station 102 to open; determining whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully open position, and if so, controlling the oil supply line and return oil line of the main hydraulic station 101 to close, and controlling the oil supply line and return oil line of the backup hydraulic station 102 to open.

[0118] As an optional implementation, the oil return control unit 302 is also used for:

[0119] If the working state of the main hydraulic station 101 is detected to be abnormal during the movement of the hydraulic cylinder piston from the fully open position to the fully closed position, the first return oil control is executed in reverse based on the current stroke information.

[0120] Furthermore, if an abnormal working state of the main hydraulic station 101 is detected during the movement of the hydraulic cylinder piston from the fully closed position to the fully open position, the second return oil control is executed in reverse based on the current stroke information.

[0121] Since the hydraulic system control device described in this embodiment is an electronic device used to implement the hydraulic system control method in this embodiment of the invention, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the hydraulic system control method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the hydraulic system control method in this embodiment of the invention falls within the scope of protection of this invention.

[0122] Thirdly, based on the same inventive concept, the embodiments of the present invention provide a hydraulic system control device that can be applied to the aforementioned hydraulic system.

[0123] Please refer to Figure 4 As shown, the hydraulic system control device provided in this embodiment of the invention includes: a memory 401, a processor 402, and code stored in the memory and executable on the processor 402. When the processor 402 executes the code, it implements any of the embodiments of the hydraulic system control method described above.

[0124] Among them, Figure 4In this document, a bus architecture (represented by bus 400) is used. Bus 400 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 402 and memory represented by memory 401. Bus 400 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 405 provides an interface between bus 400 and receiver 403 and transmitter 404. Receiver 403 and transmitter 404 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 401 can be used to store data used by processor 402 during operation.

[0125] Fourthly, based on the hydraulic control device provided in the third aspect, the present invention provides a hydraulic system through an embodiment of the present invention, including a hydraulic cylinder, a main hydraulic station, a backup hydraulic station, and a hydraulic system control device as described in the third aspect, wherein the hydraulic system control device is electrically connected to the electrically controlled valves of the hydraulic cylinder, the main hydraulic station, and the backup hydraulic station, respectively.

[0126] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0127] 1. By acquiring the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station 101, when an abnormal working status of the main hydraulic station 101 is detected, if the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position, the first return oil control can be executed. If the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position, the second return oil control can be executed. Therefore, in the event of a failure in the main hydraulic station 101, the oil in the main hydraulic station 101 can be returned to the main hydraulic station 101 oil tank, and the backup hydraulic station 102 can be switched to provide power to the entire hydraulic system, ensuring the normal operation of the hydraulic system and thus improving the robustness of the hydraulic system.

[0128] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable code.

[0129] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer instructions. These computer instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0130] These computer instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0131] These computer instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0132] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0133] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A hydraulic system control method, characterized in that, Applied to a hydraulic system, the hydraulic system includes a hydraulic cylinder, a main hydraulic station, and a backup hydraulic station; the hydraulic system control method includes: Obtain the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station; When the working state of the main hydraulic station is detected to be abnormal, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position, the first return oil control is executed. The first return oil control includes: controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open. If the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position, then control the oil supply line and return line of the main hydraulic station to close, and control the oil supply line and return line of the backup hydraulic station to open.

2. The method as described in claim 1, characterized in that, Before the oil supply line of the main hydraulic station and the return line of the backup hydraulic station are closed, the system further includes: The real-time liquid level information of the main hydraulic station oil tank is obtained, and based on the real-time liquid level information, it is determined whether the actual liquid level of the main hydraulic station oil tank exceeds the preset upper limit value. If so, then execute the steps of controlling the oil supply line and return line of the main hydraulic station to close, and controlling the oil supply line and return line of the backup hydraulic station to open. Otherwise, the steps of controlling the oil supply line of the main hydraulic station and the return line of the backup hydraulic station to close, and controlling the return line of the main hydraulic station and the supply line of the backup hydraulic station to open shall be performed.

3. The method as described in claim 1, characterized in that, Also includes: When the working state of the main hydraulic station is detected to be abnormal, and the initial stroke information indicates that the hydraulic cylinder piston is in the fully closed position, the second return oil control is executed. The second return oil control includes: controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open.

4. The method as described in claim 3, characterized in that, Before the oil supply line of the main hydraulic station and the return line of the backup hydraulic station are closed, the system further includes: The real-time liquid level information of the main hydraulic station oil tank is obtained, and based on the real-time liquid level information, it is determined whether the actual liquid level of the main hydraulic station oil tank exceeds the preset upper limit value. If so, then the oil supply line and return line of the main hydraulic station are closed, and the oil supply line and return line of the backup hydraulic station are opened. Otherwise, the steps of controlling the oil supply line of the main hydraulic station and the return line of the backup hydraulic station to close, and controlling the return line of the main hydraulic station and the supply line of the backup hydraulic station to open shall be performed.

5. The method as described in claim 3 or 4, characterized in that, The second return oil control also includes: After the main hydraulic station's oil supply line and the backup hydraulic station's oil return line are closed, and the main hydraulic station's oil return line and the backup hydraulic station's oil supply line are opened, it is determined whether the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully open position. If so, the main hydraulic station's oil supply line and oil return line are closed, and the backup hydraulic station's oil supply line and oil return line are opened.

6. The method as described in claim 5, characterized in that, Also includes: During the movement of the hydraulic cylinder piston from the fully open position to the fully closed position, if an abnormal working state of the main hydraulic station is detected, the first return oil control is executed in reverse based on the current stroke information. The reverse execution of the first return oil control involves controlling the oil supply line and return oil line of the main hydraulic station to close, and controlling the oil supply line and return oil line of the backup hydraulic station to open.

7. The method as described in claim 5, characterized in that, Also includes: During the movement of the hydraulic cylinder piston from the fully closed position to the fully open position, if an abnormal working state of the main hydraulic station is detected, the second return oil control is executed in reverse based on the current stroke information. The reverse execution of the second return oil control involves controlling the oil supply line and return oil line of the main hydraulic station to close, and controlling the oil supply line and return oil line of the backup hydraulic station to open.

8. A hydraulic system control device, characterized in that, Applied to a hydraulic system, the hydraulic system includes a hydraulic cylinder, a main hydraulic power unit, and a backup hydraulic power unit; the hydraulic system control device includes: The data acquisition unit is used to acquire the initial stroke information of the hydraulic cylinder piston and the working status of the main hydraulic station; The oil return control unit is used to execute the first oil return control when the working state of the main hydraulic station is detected to be abnormal and the initial stroke information indicates that the hydraulic cylinder piston is in the fully open position; The first return oil control includes: controlling the oil supply line of the main hydraulic station and the return oil line of the backup hydraulic station to close, and controlling the return oil line of the main hydraulic station and the oil supply line of the backup hydraulic station to open. If the current stroke information of the hydraulic cylinder piston indicates that the hydraulic cylinder piston is in the fully closed position, then control the oil supply line and return line of the main hydraulic station to close, and control the oil supply line and return line of the backup hydraulic station to open.

9. A hydraulic system control device, comprising a memory, a processor, and code stored in the memory and executable on the processor, characterized in that, When the processor executes the code, it implements the method described in any one of claims 1-7.

10. A hydraulic system, characterized in that, It includes a hydraulic cylinder, a main hydraulic station, a backup hydraulic station, and a hydraulic system control device as described in claim 9, wherein the hydraulic system control device is electrically connected to the electrically controlled valves of the hydraulic cylinder, the main hydraulic station, and the backup hydraulic station, respectively.

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