Operation control method, device and equipment of hydraulic system

Abstract

The invention discloses an operation control method, device and equipment of a hydraulic system, the hydraulic system comprises a hydraulic system body, a stop valve, an oil inlet pressure oil pipe arranged between an outlet of the hydraulic system body and the stop valve and a pressure sensor arranged in the oil inlet pressure oil pipe, and the method comprises the steps that the working state of the stop valve is obtained; if it is detected that the working state of the hydraulic system is switched from the open state to the stop state and the working state of the stop valve is the closed state, the oil pipe pressure detected by a pressure sensor is obtained; and if the oil pipe pressure is larger than the preset first pressure threshold value, the oil inlet pressure oil pipe is subjected to pressure relief. The technical problem that major potential safety hazards exist in external hydraulic equipment is solved.

Description

Technical Field

[0001] The present invention belongs to the field of hydraulic technology, and in particular relates to an operation control method, device and equipment for a hydraulic system. Background Art

[0002] At the beginning of the operation of the hydraulic system, there is a risk of instantaneous large flow shock in the external hydraulic equipment, which may lead to major safety accidents, bring significant losses to the enterprise, and further increase the production costs of the enterprise. Therefore, the major safety hazards of external hydraulic equipment are a technical problem that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present invention provide a method, device and equipment for controlling the operation of a hydraulic system, which solve the technical problem that external hydraulic equipment has major safety hazards.

[0004] In a first aspect, an embodiment of the present invention provides an operation control method for a hydraulic system, wherein the hydraulic system includes a hydraulic system body, a cut-off valve, an oil inlet pressure pipe arranged between an outlet of the hydraulic system body and the cut-off valve, and a pressure sensor arranged inside the oil inlet pressure pipe, wherein the method includes: obtaining the working state of the cut-off valve; if it is detected that the working state of the hydraulic system is switched from an open state to a stopped state, and the working state of the cut-off valve is a closed state, obtaining the oil pipe pressure detected by the pressure sensor; if the oil pipe pressure is greater than a preset first pressure threshold, relieving the pressure of the oil inlet pressure pipe.

[0005] In combination with the first aspect of the present invention, in some embodiments, the hydraulic system also includes a return oil pressure-free oil pipe, a pressure relief oil pipe and a unloading valve arranged on the pressure relief oil pipe, one end of the pressure relief oil pipe is connected to the oil inlet pressure oil pipe, and the other end of the pressure relief oil pipe is connected to the return oil pressure-free oil pipe, and the pressure relief of the oil inlet pressure oil pipe includes: controlling the unloading valve to relieve the pressure of the oil inlet pressure oil pipe.

[0006] In combination with the first aspect of the present invention, in some embodiments, the diameter of the unloading valve is 1mm~10mm, and the controlling of the unloading valve to relieve the pressure of the oil inlet pressure pipe includes: controlling the unloading valve to be in an open state according to a preset pressure relief time to relieve the pressure of the oil inlet pressure pipe.

[0007] In combination with the first aspect of the present invention, in some embodiments, the diameter of the unloading valve is 10mm~25mm, the unloading valve is a solenoid valve, and the controlling of the unloading valve to relieve the pressure of the oil inlet pressure pipe includes: determining a target valve opening based on the oil pipe pressure; and controlling the opening of the solenoid valve based on the target valve opening to relieve the pressure of the oil inlet pressure pipe.

[0008] In combination with the first aspect of the present invention, in some embodiments, determining the target valve opening based on the oil pipeline pressure includes: determining an allowable range of valve opening based on the oil pipeline pressure; and selecting an opening value from the allowable range of valve opening based on a preset target pressure relief rate as the target valve opening.

[0009] In combination with the first aspect of the present invention, in some embodiments, determining the allowable range of valve opening based on the oil pipeline pressure includes: if the oil pipeline pressure is greater than a preset second pressure threshold, using a preset first allowable range of opening as the allowable range of valve opening, and the first pressure threshold is less than the second pressure threshold; if the oil pipeline pressure is less than or equal to the second pressure threshold, using a preset second allowable range of opening as the allowable range of valve opening, and the upper limit value of the first allowable range of opening is less than the upper limit value of the second allowable range of opening.

[0010] In combination with the first aspect of the present invention, in some embodiments, after controlling the opening of the solenoid valve based on the target valve opening, it also includes: obtaining the real-time pressure of the pressure sensor; if the real-time pressure is less than a preset third pressure threshold, adjusting the opening of the solenoid valve from the target valve opening to zero, and the third pressure threshold is less than the first pressure threshold.

[0011] In combination with the first aspect of the present invention, in some embodiments, after controlling the opening of the solenoid valve based on the target valve opening, it also includes: if the real-time pressure is greater than a preset fourth pressure threshold, setting the hydraulic system to a prohibited working state and outputting an alarm message, and the third pressure threshold is less than the fourth pressure threshold.

[0012] In a second aspect, an embodiment of the present invention provides an operation control device for a hydraulic system, wherein the hydraulic system comprises a hydraulic system body, a cut-off valve, an oil inlet pressure pipe arranged between the outlet of the hydraulic system body and the cut-off valve, and a pressure sensor arranged inside the oil inlet pressure pipe, wherein the device comprises: a state acquisition unit for acquiring the working state of the cut-off valve; a pressure acquisition unit for acquiring the oil pipe pressure detected by the pressure sensor if it is detected that the working state of the hydraulic system is switched from an open state to a stopped state and the working state of the cut-off valve is a closed state; and a pressure relief unit for relieving the pressure of the oil inlet pressure pipe if the oil pipe pressure is greater than a preset first pressure threshold.

[0013] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods described in the first aspect when executing the computer program.

[0014] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0015] The embodiment of the present invention obtains the working state of the shut-off valve; if it is detected that the working state of the hydraulic system switches from the open state to the stopped state, and the working state of the shut-off valve is the closed state, the oil pipe pressure detected by the pressure sensor is obtained; if the oil pipe pressure is greater than the preset first pressure threshold, the oil inlet pressure pipe is depressurized. The oil pipe pressure greater than the preset first pressure threshold indicates that the external hydraulic equipment is at risk of instantaneous large flow shock. At this time, the oil inlet pressure pipe of the hydraulic system is depressurized to reduce the pressure of the oil inlet pressure pipe, thereby avoiding the external hydraulic equipment from being subjected to instantaneous large flow shock. Therefore, the safety of the external hydraulic equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of a hydraulic system and external hydraulic equipment in an embodiment of the present invention;

[0018] Figure 2 is a flow chart of an operation control method of a hydraulic system in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the operating principle of the hydraulic system in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the operating principle of a cut-off valve in an embodiment of the present invention;

[0021] Figure 5 It is a functional module diagram of the operation control device of the hydraulic system in an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The embodiment of the present invention provides an operation control method of a hydraulic system, referring to Figure 1 As shown, Figure 1 Schematic diagram of a hydraulic system and an external hydraulic device in an embodiment of the present invention. The hydraulic system includes a hydraulic system body, a cut-off valve, an oil inlet pressure oil pipe disposed between the outlet of the hydraulic system body and the cut-off valve, and a pressure sensor disposed inside the oil inlet pressure oil pipe. Figure 2 As shown, Figure 2 This is a flow chart of a method for controlling the operation of a hydraulic system in an embodiment of the present invention. The method includes the following steps S201 to S203:

[0026] S201: Obtain the working status of the shut-off valve.

[0027] It should be noted that the cut-off valve is arranged on the oil pipe at the outlet of the hydraulic system. When the cut-off valve is in the closed state, the hydraulic system cannot drive the external hydraulic equipment to work. When the cut-off valve is in the open state, the hydraulic system can drive the external hydraulic equipment to work.

[0028] S202: If it is detected that the working state of the hydraulic system is switched from the open state to the stopped state, and the working state of the cut-off valve is the closed state, the oil pipe pressure detected by the pressure sensor is obtained.

[0029] S203: If the oil pipe pressure is greater than a preset first pressure threshold, the oil inlet pressure oil pipe is depressurized.

[0030] It should be noted that the oil pipe pressure greater than the preset first pressure threshold indicates that the external hydraulic equipment is at risk of instantaneous large flow shock. The instantaneous large flow shock refers to the instantaneous increase in the internal pipeline pressure of the external hydraulic equipment due to excessive oil pipe pressure in the oil inlet pressure pipe.

[0031] In some embodiments, reference Figure 1 As shown, the hydraulic system also includes a return oil pressure-free oil pipe, a pressure relief oil pipe and a unloading valve arranged on the pressure relief oil pipe. One end of the pressure relief oil pipe is connected to the oil inlet pressure oil pipe, and the other end of the pressure relief oil pipe is connected to the return oil pressure-free oil pipe. Relieving the pressure of the oil inlet pressure oil pipe may include: controlling the unloading valve to relieve the pressure of the oil inlet pressure oil pipe.

[0032] In some embodiments, the diameter of the unloading valve may be 1 mm to 10 mm, and controlling the unloading valve to relieve pressure on the oil inlet pressure pipe may include: controlling the unloading valve to be in an open state according to a preset pressure relief time to relieve pressure on the oil inlet pressure pipe.

[0033] It should be noted that the preset pressure relief time may be greater than 120 seconds, such as 150 seconds. The embodiment of the present invention reduces the computational dependence on hardware and simplifies the complexity of the control of the unloading valve by directly controlling the unloading valve to be in an open state according to the preset pressure relief time.

[0034] In other embodiments, the diameter of the unloading valve may be 10 mm to 25 mm, and the unloading valve may be a solenoid valve. Controlling the unloading valve to release the pressure of the oil inlet pressure oil pipe may include the following steps S2031 to S2032:

[0035] S2031: Determine the target valve opening based on the oil pipe pressure.

[0036] In some implementations, step S2031 may include: determining an allowable range of valve opening based on the oil pipe pressure; and selecting an opening value from the allowable range of valve opening based on a preset target pressure relief rate as the target valve opening.

[0037] In some embodiments, determining the allowable range of valve opening based on the oil pipeline pressure may include: if the oil pipeline pressure is greater than a preset second pressure threshold, using the preset first allowable range of opening as the allowable range of valve opening, and the first pressure threshold is less than the second pressure threshold; if the oil pipeline pressure is less than or equal to the second pressure threshold, using the preset second allowable range of opening as the allowable range of valve opening, and the upper limit value of the first allowable range of opening is less than the upper limit value of the second allowable range of opening.

[0038] It should be noted that, when the diameter of the unloading valve is 10 mm to 25 mm, due to the large diameter of the unloading valve, the pressure can be released at a very fast rate when the unloading valve is fully opened. When the oil pipe pressure is large, the pressure shock suffered by the hydraulic system during pressure relief is more intense, and may even cause damage to the hydraulic system, such as the pressure relief oil pipe being subjected to a large shock and causing unstable connection. Therefore, the embodiment of the present invention limits the determination of the valve opening allowable range based on the oil pipe pressure, and when the oil pipe pressure is large, the upper limit value of the valve opening allowable range is limited to a smaller value, that is, the preset first opening allowable range is used as the valve opening allowable range, thereby avoiding damage to the hydraulic system due to the large oil pipe pressure and improving the safety of the hydraulic system. When the oil pipe pressure is small, even if the unloading valve is fully opened, the pressure shock suffered by the hydraulic system during pressure relief is not large, and will not cause damage to the hydraulic system. When the oil pipe pressure is small, the upper limit value of the valve opening allowable range is limited to a larger value, that is, the preset second opening allowable range is used as the valve opening allowable range, and rapid pressure relief of the hydraulic system can be achieved. Therefore, the safety and pressure relief efficiency of the hydraulic system are taken into account.

[0039] The above-described determination of the allowable range of valve opening based on the oil pipe pressure is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes.

[0040] In some embodiments, an opening value is selected from the allowable range of valve opening based on a preset target pressure relief rate as the target valve opening, which can be: if there is an opening value corresponding to the target pressure relief rate in the allowable range of valve opening, the opening value corresponding to the target pressure relief rate is used as the target valve opening; if there is no opening value corresponding to the target pressure relief rate in the allowable range of valve opening, and the pressure relief rate corresponding to the upper limit value of the allowable range of valve opening is less than the target pressure relief rate, the upper limit value of the allowable range of valve opening is used as the target valve opening; if there is no opening value corresponding to the target pressure relief rate in the allowable range of valve opening, and the pressure relief rate corresponding to the lower limit value of the allowable range of valve opening is greater than the target pressure relief rate, the lower limit value of the allowable range of valve opening is used as the target valve opening.

[0041] It should be noted that under different production situations, the demand for the pressure relief rate of the hydraulic system is different. For example, when the production rhythm is fast, the pressure relief rate of the hydraulic system needs to be increased to quickly enter the next production. At this time, a higher target pressure relief rate can be set according to the user's intention to improve the user experience. When the production rhythm is slow, the pressure relief rate of the hydraulic system can be controlled to maintain a smaller value, and the pressure can be released slowly to avoid damage to the hydraulic system caused by excessive pressure release. Therefore, the embodiment of the present invention not only improves the user experience, but also achieves a balance between the safety and pressure relief efficiency of the hydraulic system by limiting the selection of an opening value from the allowable range of the valve opening based on a preset target pressure relief rate as the target valve opening.

[0042] S2032: Based on the target valve opening, the opening of the solenoid valve is controlled to relieve the pressure of the oil inlet pressure oil pipe.

[0043] In some embodiments, after controlling the opening of the solenoid valve based on the target valve opening, it can also include: obtaining the real-time pressure of the pressure sensor; if the real-time pressure is less than a preset third pressure threshold, adjusting the opening of the solenoid valve from the target valve opening to zero, and the third pressure threshold is less than the first pressure threshold.

[0044] It should be noted that the real-time pressure is less than the preset third pressure threshold, indicating that there is no safety risk to the external hydraulic equipment and the pressure of the oil inlet pressure pipe is small enough.

[0045] In some embodiments, after controlling the opening of the solenoid valve based on the target valve opening, it may also include: setting a preset waiting time interval, if the real-time pressure is greater than a preset fourth pressure threshold, setting the hydraulic system to a prohibited working state, and outputting an alarm message, and the third pressure threshold is less than the fourth pressure threshold.

[0046] It should be noted that the real-time pressure is greater than the preset fourth pressure threshold, indicating that the external hydraulic equipment has a safety risk, and the pressure of the oil inlet pressure pipe is relatively high. The fourth pressure threshold may be 10 bar. The alarm information may be information for prompting that the external hydraulic equipment has a safety risk. The preset waiting time may be 5 minutes, 7 minutes, or 10 minutes, etc.

[0047] It should be noted that, after the preset waiting time, if the real-time pressure is still greater than the preset fourth pressure threshold, it means that the unloading valve or the hydraulic system body has a fault, resulting in the inability to reduce the pressure of the oil inlet pressure pipe. Therefore, the embodiment of the present invention sets the hydraulic system to a prohibited working state and outputs an alarm message, thereby avoiding starting the hydraulic system when the pressure of the oil inlet pressure pipe is high, thereby improving the safety of the hydraulic system and external hydraulic equipment.

[0048] It should be noted that hydraulic technology has the advantages of flexible transmission, large power-to-weight ratio, high control accuracy, and fast response speed, which meets the requirements of large-scale, continuous, and high-precision development in the steel industry. Therefore, it is widely used in the metallurgical industry. As an important power source in the hydraulic system, the hydraulic station plays a pivotal role in the steel industry, especially in hot rolling, cold rolling, and silicon steel processes. At present, due to the lack of an intermediate pipeline unloading device at the outlet of the hydraulic station of the rolling line unit, there is a common instantaneous large flow shock during the start-stop process, which poses a major safety hazard to the entire external hydraulic equipment. The installation of this anti-shock unloading device can effectively prevent damage to the equipment caused by hydraulic shock and ensure the safety of equipment and personnel.

[0049] It should be noted that when the hydraulic system is operating normally, the unloading valve is in a closed state (at this time, the oil inlet pressure pipe and the return oil pressureless pipe are not connected). When the hydraulic system stops, the unloading valve (at this time, the oil inlet pressure pipe and the return oil pressureless pipe are connected) is opened for 150 seconds and then closed. The signal output module can be connected to the control valve head of the unloading valve to send a signal Q to control the opening and closing of the unloading valve. The signal input module can be connected to the operating signal of the hydraulic system. After all the main pumps of the hydraulic system are stopped, the operating signal I is detected. The pressure sensor detects the pressure of the oil inlet pressure pipe before the unloading valve. The controller can be connected to the signal input module, the signal output module and the pressure sensor respectively. The signal input module detects the operating signal I and the signal output module sends the signal Q to control the opening of the unloading valve. After opening for 150 seconds, if the pressure value detected by the pressure sensor is greater than 10bar, the interlocking hydraulic main pump cannot be started and an alarm is issued. The following is an example of the hot rolling finishing high pressure system to explain the control process: the normal working pressure of the hydraulic system is 290bar. When the hydraulic pump station stops, the signal input module detects the main pump all stop signal I. The controller receives the input signal and sends the output signal Q through the signal output module. The output signal is transmitted to the unloading valve to control it to open and last for 150 seconds. At this time, the oil inlet pressure oil pipe and the return oil pressureless oil pipe are connected and the pressure is released. After 150 seconds, the output signal stops and the unloading valve is in a closed state. At this time, the oil inlet pressure oil pipe and the return oil pressureless oil pipe are not connected. At this time, the pressure sensor detects the pressure value of the oil inlet pressure oil pipe. If the pressure is less than 10bar, it is normal; if the pressure is greater than 10bar, the main pump cannot be started through the controller interlock and an alarm is issued. The equipment maintenance personnel need to check and eliminate the abnormality before starting the main pump normally.

[0050] It should be noted that an anti-impact unloading device can be installed on the hot rolling and finishing high-pressure system where the problem is most serious. The operating effect is very significant. There is no loud noise or damage caused by instantaneous impact. It plays a very good protective role for the entire hydraulic system and external hydraulic equipment. It can continue to be used in other hydraulic systems such as hot rolling, silicon steel and cold rolling in the future.

[0051] refer to Figure 3 and Figure 4 As shown, Figure 3 is a schematic diagram of the operating principle of the hydraulic system in an embodiment of the present invention, Figure 4 This is a schematic diagram of the operating principle of the shut-off valve in the embodiment of the present invention. There are some problems in the design of the hydraulic system of the rolling line unit. For example, there is no unloading device at the outlet of the hydraulic system. Every time after the hydraulic system is stopped, the high pressure in the pipeline between the outlet of the pump station and the shut-off valve cannot be unloaded by itself. Therefore, when the hydraulic system is started again, the moment the shut-off valve is opened, there is a momentary impact on the entire external system pipeline. During this period, the problem of the hydraulic valve being damaged has occurred many times, and there is a very large safety hazard to the entire hydraulic equipment. In the embodiment of the present invention, an anti-impact unloading device (i.e., a pressure relief oil pipe and an unloading valve) is installed on the pipeline between the outlet of the hydraulic system body and the shut-off valve (i.e., between the oil inlet pressure oil pipe and the return oil pressure-free oil pipe). Modifications are made in the program, requiring that after all the main pumps of the hydraulic system are stopped, the unloading valve automatically opens for 150 seconds to release the residual pressure in the pipe, effectively preventing the residual pressure impact in the pump station from damaging the equipment.

[0052] The embodiment of the present invention obtains the working state of the shut-off valve; if it is detected that the working state of the hydraulic system switches from the open state to the stopped state, and the working state of the shut-off valve is the closed state, the oil pipe pressure detected by the pressure sensor is obtained; if the oil pipe pressure is greater than the preset first pressure threshold, the oil inlet pressure pipe is depressurized. The oil pipe pressure greater than the preset first pressure threshold indicates that the external hydraulic equipment is at risk of instantaneous large flow shock. At this time, the oil inlet pressure pipe of the hydraulic system is depressurized to reduce the pressure of the oil inlet pressure pipe, thereby avoiding the external hydraulic equipment from being subjected to instantaneous large flow shock. Therefore, the safety of the external hydraulic equipment is improved.

[0053] Based on the same inventive concept, Figure 5 As shown, an embodiment of the present invention provides an operation control device 10 for a hydraulic system, wherein the hydraulic system includes a hydraulic system body, a cut-off valve, an oil inlet pressure pipe arranged between the outlet of the hydraulic system body and the cut-off valve, and a pressure sensor arranged inside the oil inlet pressure pipe. The operation control device 10 for the hydraulic system includes: a state acquisition unit 110, for acquiring the working state of the cut-off valve; a pressure acquisition unit 120, for acquiring the oil pipe pressure detected by the pressure sensor if it is detected that the working state of the hydraulic system is switched from an open state to a stopped state, and the working state of the cut-off valve is a closed state; and a pressure relief unit 130, for relieving the pressure of the oil inlet pressure pipe if the oil pipe pressure is greater than a preset first pressure threshold.

[0054] It can be understood that the hydraulic system also includes a return oil pressure-free oil pipe, a pressure relief oil pipe and a unloading valve arranged on the pressure relief oil pipe. One end of the pressure relief oil pipe is connected to the oil inlet pressure oil pipe, and the other end of the pressure relief oil pipe is connected to the return oil pressure-free oil pipe. The pressure relief unit 130 includes: a valve control subunit, which is used to control the unloading valve to relieve the pressure of the oil inlet pressure oil pipe.

[0055] In some embodiments, the diameter of the unloading valve is 1 mm to 10 mm, and the valve control subunit is specifically used to control the unloading valve to be in an open state according to a preset pressure relief time to relieve the pressure of the oil inlet pressure pipe.

[0056] In other embodiments, the diameter of the unloading valve is 10 mm to 25 mm, the unloading valve is a solenoid valve, and the valve control subunit includes: an opening determination module, used to determine the target valve opening based on the oil pipe pressure; an opening control module, used to control the opening of the solenoid valve based on the target valve opening to relieve the pressure of the oil inlet pressure pipe.

[0057] It can be understood that the opening determination module is specifically used to: determine the valve opening allowable range based on the oil pipe pressure; select an opening value from the valve opening allowable range based on the preset target pressure relief rate as the target valve opening. Wherein, determining the valve opening allowable range based on the oil pipe pressure includes: if the oil pipe pressure is greater than the preset second pressure threshold, using the preset first opening allowable range as the valve opening allowable range, and the first pressure threshold is less than the second pressure threshold; if the oil pipe pressure is less than or equal to the second pressure threshold, using the preset second opening allowable range as the valve opening allowable range, and the upper limit value of the first opening allowable range is less than the upper limit value of the second opening allowable range.

[0058] It can be understood that the operation control device 10 of the hydraulic system also includes: an opening adjustment unit, which is used to obtain the real-time pressure of the pressure sensor after controlling the opening of the solenoid valve based on the target valve opening; if the real-time pressure is less than a preset third pressure threshold, the opening of the solenoid valve is adjusted from the target valve opening to zero, and the third pressure threshold is less than the first pressure threshold.

[0059] It can be understood that the operation control device 10 of the hydraulic system also includes: an alarm unit, which is used to control the opening of the solenoid valve based on the target valve opening, and then set the hydraulic system to a prohibited working state and output an alarm message at a preset waiting time interval if the real-time pressure is greater than the preset fourth pressure threshold. The third pressure threshold is less than the fourth pressure threshold.

[0060] It should be understood that more implementation details of the operation control device 10 of the hydraulic system in the embodiment of the present invention refer to the operation control method of the hydraulic system described above, and for the sake of brevity of the specification, they are not repeated here.

[0061] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, such as Figure 6 As shown, it includes a memory 604, a processor 602, and a computer program stored in the memory 604 and executable on the processor 602. The processor 602 executes the program to implement the steps described in any implementation of the operation control method of the hydraulic system.

[0062] Among them, Figure 6 In the embodiment of the present invention, a bus architecture (represented by bus 600) is shown, which may include any number of interconnected buses and bridges, and bus 600 links various circuits including one or more processors represented by processor 602 and memory represented by memory 604. Bus 600 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 605 provides an interface between bus 600 and receiver 601 and transmitter 603. Receiver 601 and transmitter 603 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 602 is responsible for managing bus 600 and general processing, while memory 604 may be used to store data used by processor 602 when performing operations.

[0063] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0064] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0065] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0066] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0067] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling the operation of a hydraulic system, characterized in that: The hydraulic system comprises a hydraulic system body, a cut-off valve, an oil inlet pressure oil pipe arranged between an outlet of the hydraulic system body and the cut-off valve, and a pressure sensor arranged inside the oil inlet pressure oil pipe, and the method comprises: Obtaining the working status of the cut-off valve; If it is detected that the working state of the hydraulic system is switched from the open state to the stopped state, and the working state of the cut-off valve is the closed state, the oil pipe pressure detected by the pressure sensor is obtained; If the oil pipe pressure is greater than a preset first pressure threshold, the oil inlet pressure oil pipe is depressurized.

2. The operation control method of the hydraulic system according to claim 1, characterized in that: The hydraulic system further includes a return oil pressureless oil pipe, a pressure relief oil pipe and an unloading valve arranged on the pressure relief oil pipe, one end of the pressure relief oil pipe is connected to the oil inlet pressure oil pipe, and the other end of the pressure relief oil pipe is connected to the return oil pressureless oil pipe, and the pressure relief of the oil inlet pressure oil pipe includes: The unloading valve is controlled to relieve the pressure of the oil inlet pressure oil pipe.

3. The operation control method of the hydraulic system according to claim 2, characterized in that: The diameter of the unloading valve is 1 mm to 10 mm. The controlling of the unloading valve to release the pressure of the oil inlet pressure oil pipe includes: According to the preset pressure relief time, the unloading valve is controlled to be in an open state to relieve the pressure of the oil inlet pressure oil pipe.

4. The operation control method of the hydraulic system according to claim 2, characterized in that: The unloading valve has a diameter of 10 mm to 25 mm, and is a solenoid valve. The unloading valve is controlled to release the pressure of the oil inlet pressure pipe, including: determining a target valve opening based on the oil pipe pressure; Based on the target valve opening, the opening of the solenoid valve is controlled to relieve the pressure of the oil inlet pressure oil pipe.

5. The operation control method of the hydraulic system according to claim 4, characterized in that: Determining the target valve opening based on the oil pipe pressure includes: Determining an allowable range of valve opening based on the oil pipe pressure; An opening value is selected from the allowable range of the valve opening based on a preset target pressure relief rate as the target valve opening.

6. The operation control method of the hydraulic system according to claim 5, characterized in that: The step of determining the allowable range of valve opening based on the oil pipe pressure includes: If the oil pipe pressure is greater than a preset second pressure threshold, a preset first opening allowable range is used as the valve opening allowable range, and the first pressure threshold is less than the second pressure threshold; If the oil pipe pressure is less than or equal to the second pressure threshold, the preset second opening allowable range is used as the valve opening allowable range, and the upper limit value of the first opening allowable range is less than the upper limit value of the second opening allowable range.

7. The operation control method of the hydraulic system according to claim 4, characterized in that: After controlling the opening of the solenoid valve based on the target valve opening, the method further includes: Acquiring the real-time pressure of the pressure sensor; If the real-time pressure is less than a preset third pressure threshold, the opening of the solenoid valve is reduced from the target valve opening to zero, and the third pressure threshold is less than the first pressure threshold.

8. The operation control method of the hydraulic system according to claim 7, characterized in that: After controlling the opening of the solenoid valve based on the target valve opening, the method further includes: The waiting time is preset at intervals. If the real-time pressure is greater than a preset fourth pressure threshold, the hydraulic system is set to a prohibited working state and an alarm message is output. The third pressure threshold is less than the fourth pressure threshold.

9. An operation control device for a hydraulic system, characterized in that: The hydraulic system comprises a hydraulic system body, a cut-off valve, an oil inlet pressure oil pipe arranged between an outlet of the hydraulic system body and the cut-off valve, and a pressure sensor arranged inside the oil inlet pressure oil pipe, and the device comprises: A state acquisition unit, used for acquiring the working state of the cut-off valve; A pressure acquisition unit, for acquiring the oil pipe pressure detected by the pressure sensor if it is detected that the working state of the hydraulic system is switched from the open state to the stopped state and the working state of the cut-off valve is the closed state; The pressure relief unit is used to relieve the pressure of the oil inlet pressure oil pipe if the oil pipe pressure is greater than a preset first pressure threshold.

10. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 8 when executing the computer program.

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