Pressure control methods, devices, hydraulic systems and operating machinery

Abstract

This invention provides a pressure control method, device, hydraulic system, and operating machinery, belonging to the field of pressure control technology. The method detects the current opening information of the operating handle; determines the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure; and controls a proportional relief valve to adjust the motor pressure based on the target pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor. Since the adjustment method of the motor pressure is determined by the opening information of the operating handle, the operator only needs to control different openings of the operating handle to control different pressures applied to the motor, simplifying the pressure operation and thus effectively improving the efficiency of construction operations.

Description

Technical Field

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

[0002] Large drilling rigs, such as rotary drilling rigs, require a power head to apply axial pressure to the drill rod and control the axial pressurization movement during drilling. To improve construction efficiency, the power head needs to be able to rapidly lift axially during the lifting process. Therefore, a pressurization device is required that can adjust its output pressure according to the drill bit's working condition. Currently, most pressurization methods involve repeatedly performing pressurization operations, with each pressurization operation applying a fixed pressure value.

[0003] However, this method of applying pressure is relatively complex, which leads to relatively low construction efficiency. Summary of the Invention

[0004] This invention provides a pressure control method, device, hydraulic system, and working machinery to solve the defects of complex pressure operation and low construction efficiency in the prior art. It realizes the automatic adjustment of the pressure based on the opening information of the operating handle, which simplifies the pressure operation and improves the construction efficiency compared with the fixed pressure value method.

[0005] This invention provides a pressure control method, comprising:

[0006] Detect the current opening information of the operating handle;

[0007] Based on the correspondence between opening information and applied pressure, the target applied pressure corresponding to the current opening information is determined;

[0008] The proportional relief valve adjusts the motor pressure based on the target applied pressure, and the hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0009] According to a pressure control method provided by the present invention, the detection of the current opening information of the operating handle includes:

[0010] Determine the secondary pilot pressure output by the operating handle;

[0011] The current opening information of the operating handle is determined based on the secondary pilot pressure.

[0012] According to a pressure control method provided by the present invention, the proportional relief valve is used to adjust the motor pressure based on the target pressure, comprising:

[0013] Determine the pressurization current based on the target pressurization pressure;

[0014] The proportional relief valve is controlled to regulate the motor pressure using the pressurized current.

[0015] According to a pressure control method provided by the present invention, after detecting the current opening information of the operating handle, the method further includes:

[0016] Based on the correspondence between the opening information and the motor speed, the target motor speed corresponding to the current opening information is determined;

[0017] The control motor increases or decreases the power head based on the target motor speed.

[0018] According to a pressure control method provided by the present invention, the control motor increases or decreases the power head based on the target motor speed, comprising:

[0019] Based on the current opening information, determine the hydraulic oil flow rate of the main pump;

[0020] Based on the hydraulic oil flow rate of the main pump, the motor is controlled to raise or lower the power head at the target motor speed.

[0021] According to a pressure control method provided by the present invention, before detecting the current opening information of the operating handle, the method further includes:

[0022] Determine the opening range of the operating handle;

[0023] The opening range is divided into a preset number of opening intervals;

[0024] For each of the aforementioned opening intervals, establish a correspondence between opening information and applied pressure, and / or establish a correspondence between opening information and motor speed.

[0025] According to a pressure control method provided by the present invention, the minimum target pressure is greater than the operating pressure for raising or lowering the power head.

[0026] The present invention also provides a pressure control device, comprising:

[0027] The detection module is used to detect the current opening information of the operating handle;

[0028] The determination module is used to determine the target pressure corresponding to the current opening information based on the correspondence between the opening information and the applied pressure.

[0029] The control module is used to control the proportional relief valve to adjust the motor pressure based on the target applied pressure, and the hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0030] The present invention also provides a hydraulic system for performing the pressure control method as described in any of the preceding claims or including the pressure control device as described above.

[0031] The present invention also provides a working machine, which includes the hydraulic system as described above.

[0032] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the pressure control method as described above.

[0033] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the pressure control method as described above.

[0034] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the pressure control method as described above.

[0035] This invention provides a pressure control method, device, hydraulic system, and working machinery. The method detects the current opening information of the operating handle; determines the target pressure corresponding to the current opening information based on the correspondence between the opening information and the applied pressure; and controls a proportional relief valve to adjust the motor pressure based on the target applied pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor. Since the adjustment method of the motor pressure is determined by the opening information of the operating handle, the operator only needs to control different openings of the operating handle to control different applied pressures to the motor, simplifying the pressure operation and thus effectively improving the efficiency of construction work. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is one of the flowcharts illustrating the pressure control method provided by the present invention;

[0038] Figure 2 This is a hydraulic schematic diagram of motor pressure control provided by the present invention;

[0039] Figure 3 This is a schematic diagram showing the relationship between current and pressure in the proportional relief valve provided by the present invention;

[0040] Figure 4 This is the second schematic diagram of the pressure control method provided by the present invention;

[0041] Figure 5 This is a schematic diagram illustrating the principle of the correspondence between opening information and applied pressure provided by the present invention;

[0042] Figure 6 This is a schematic diagram illustrating the principle of the correspondence between the opening information and the motor speed provided by the present invention.

[0043] Figure 7 This is a schematic diagram of the pressure control device provided by the present invention;

[0044] Figure 8 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] The following is combined Figures 1-8 This invention describes a pressure control method, device, hydraulic system, and working machinery.

[0047] Figure 1 This is one of the flowcharts of the pressure control method provided by the present invention.

[0048] like Figure 1 As shown in the figure, the present invention provides a pressure control method, the execution subject of which can be an on-board control system, and the method mainly includes the following steps:

[0049] 101. Detect the current opening information of the operating handle.

[0050] In a specific implementation process, a rotary drilling rig will be used as an example for illustration. The current opening information of the rotary drilling rig's operating handle is detected. The current opening information refers to the opening of the operating handle at the current moment. Since the operator operates the operating handle in real time during actual application, the current opening information is a real-time changing value.

[0051] The specific method for detecting the current opening information of the control handle can be as follows: An angle sensor can be used to read the operator's control of the control handle, thereby detecting the current opening information. Alternatively, a pressure sensor can be used, and the current opening information of the control handle can be determined by the data collected by the pressure sensor. The specific detection method is not strictly limited, as long as the current opening information of the control handle can be accurately detected.

[0052] 102. Based on the correspondence between opening information and pressure, determine the target pressure corresponding to the current opening information.

[0053] After accurately detecting the current opening information of the operating handle, the corresponding target applied pressure needs to be determined based on this information. The target applied pressure is the pressure value applied to the drill bit by the motor, determined by the current opening information of the operating handle. Specifically, this can be determined through the correspondence between the opening information and the applied pressure. For example, the opening information and the applied pressure can have a linear correspondence, meaning that the larger the opening information, the larger the target applied pressure. Since the current opening information changes in real time as the operator controls the operating handle, the target applied pressure also changes in real time, allowing the operator to more flexibly control the motor pressure.

[0054] Therefore, the operator can control the target pressure by adjusting the opening of the operating handle according to the actual working conditions. Compared with the traditional fixed pressure value, this enhances the operator's experience and allows for flexible adjustment based on the actual working conditions, effectively improving the operating efficiency of the rotary drilling rig.

[0055] Among them, the minimum target applied pressure is greater than the operating pressure of the power head for lifting or lowering, thereby ensuring the effective lifting of the power head and the smoothness of the lifting or lowering action.

[0056] 103. The proportional relief valve adjusts the motor pressure based on the target applied pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0057] After determining the target pressure that the operator wants to apply to the motor, the target pressure needs to be applied to the motor. The specific method is to increase the motor pressure through a secondary pressure proportional relief valve. The main function of the proportional relief valve is to control the motor's pressure relief, thereby using the target pressure to regulate the motor pressure.

[0058] The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor, thus allowing the motor pressure to be adjusted by controlling the proportional relief valve to achieve the target pressure. A shuttle valve can also be installed between the proportional relief valve and the motor to achieve unidirectional flow of the hydraulic circuit between the proportional relief valve and the motor.

[0059] The pressure control method of this invention is described in general. During operation, the operator controls the motor's pressure by adjusting the opening of the operating handle. Typically, increasing the operating handle opening increases the motor's pressure, and decreasing it decreases it. That is, if the operator needs to increase the motor pressure, they only need to increase the operating handle opening; conversely, if they need to decrease the motor pressure, they only need to decrease the operating handle opening. For the operator, flexible control of the motor's pressure is achieved simply by moving the operating handle to different opening degrees. The opening of the operating handle can be adjusted in real time according to the actual working conditions, thereby adjusting the motor's pressure. This allows the operating handle to control both the raising and lowering of the power head and the pressure of the proportional relief valve, facilitating flexible adjustment of the motor pressure by the user.

[0060] Figure 2 This is a hydraulic schematic diagram of motor pressure control provided by the present invention.

[0061] like Figure 2 As shown, a proportional relief valve for secondary pressurization is added to the traditional pressurization system. Figure 2 The pressure proportional relief valve is controlled by an electrical signal. Therefore, the opening signal of the operating handle is directly sent to the control module, which then controls the pressure proportional relief valve to adjust the motor pressure to the target pressure. The power head upward / pressure relief valve and the power head upward relief valve are traditional pressure relief valves. They adjust the motor pressure after receiving hydraulic signals from the power head downward / pressure or upward movement. Figure 2 By adding a pressure proportional relief valve, the target pressure can be controlled by adjusting the opening of the operating handle, thereby better regulating the motor pressure.

[0062] This embodiment provides a pressure control method that detects the current opening information of the operating handle; determines the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure; and controls a proportional relief valve to adjust the motor pressure based on the target pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor. Since the adjustment method of the motor pressure is determined by the opening information of the operating handle, the operator only needs to control different openings of the operating handle to control different pressures applied to the motor, simplifying the pressure operation and thus effectively improving the efficiency of construction work.

[0063] Furthermore, based on the above embodiments, the detection of the current opening information of the operating handle in this embodiment includes: determining the secondary pilot pressure output by the operating handle; and determining the current opening information of the operating handle based on the secondary pilot pressure.

[0064] Specifically, the operation process involves controlling the opening degree of the operating handle to control the output of different secondary pilot pressures, thereby controlling the applied pressure and applying different pressures to the drill bit via the motor. For example, the secondary pilot pressure and the opening degree of the operating handle can have a linear relationship; that is, the larger the opening degree of the operating handle, the greater the secondary pilot pressure, and vice versa. The opening degree can be calculated based on the magnitude of the secondary pilot pressure. The current opening degree information includes the size and direction of the opening. The size of the opening degree controls the magnitude of the applied motor pressure, and the direction of the opening degree controls the raising or lowering of the power head.

[0065] Furthermore, based on the above embodiments, the control of the proportional relief valve in this embodiment to adjust the motor pressure based on the target applied pressure includes: determining the applied pressure current according to the target applied pressure; and controlling the proportional relief valve to adjust the motor pressure with the applied pressure current.

[0066] Specifically, the working principle of a proportional relief valve is as follows: the proportional relief valve changes the relief pressure by adjusting the force of the spring. The force of the proportional electromagnet acting on the spring can be adjusted proportionally, so the pressure of the proportional relief valve will also change with the input signal. The proportional relief valve is electro-proportional controlled, and the control current is adjusted according to the actual needs to control different motor pressures or pressurizing cylinders.

[0067] Figure 3 This is a schematic diagram illustrating the relationship between current and pressure in the proportional relief valve provided by the present invention, as shown below. Figure 3As shown, within a certain range, the pressure of the proportional relief valve gradually increases with the increase of the current. Since the pressure of the proportional relief valve is controlled by the current, after determining the target pressure, the corresponding pressure current can be determined, and then the proportional relief valve can be controlled to work with the pressure current. Thus, the proportional relief valve will output the target pressure to match the opening degree of the operating handle operated by the user.

[0068] The overall workflow is as follows: the user moves the operating handle to achieve different opening degrees. A sensor detects the current opening degree of the handle, converting the physical signal of the handle's movement into an electrical signal. The control system then obtains this information and, based on the correspondence between the opening degree and the applied pressure, determines the target applied pressure. This target applied pressure is the pressure the operator wants to apply, which is achieved by controlling the proportional relief valve to output the target applied pressure to the motor, thereby increasing the motor pressure. The proportional relief valve works by determining the applied pressure current based on the target applied pressure and providing this current to the valve. Under this applied pressure current, the proportional relief valve outputs the target applied pressure to the motor. Ultimately, this allows the proportional relief valve to adjust the motor pressure according to the opening degree of the operating handle, enabling flexible adjustment of the motor pressure based on the handle's opening.

[0069] Figure 4 This is the second schematic diagram of the pressure control method provided by the present invention.

[0070] like Figure 4 As shown, the pressure control method provided in this embodiment of the invention mainly includes the following steps:

[0071] 401. Detect the current opening information of the operating handle.

[0072] 402. Based on the correspondence between opening information and pressure, determine the target pressure corresponding to the current opening information.

[0073] 403. The proportional relief valve adjusts the motor pressure based on the target applied pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0074] Regarding steps 401-403, they have been described in detail in steps 101-103 of the above embodiments, so they will not be explained in detail in this embodiment. They can be understood by referring to each other.

[0075] 404. Based on the correspondence between opening information and motor speed, determine the target motor speed corresponding to the current opening information.

[0076] In this embodiment, the motor speed control targets the lifting or lowering speed of the power head. The main function is to control the movement speed of the power head by adjusting the opening of the operating handle; a larger opening results in a faster movement speed, and a smaller opening results in a slower movement speed. For the operator, this allows for flexible control of the motor speed by adjusting the opening of the operating handle according to the required movement speed of the power head.

[0077] Once the current opening information of the control handle is determined, the target motor speed corresponding to the current opening information can be determined directly based on the correspondence between the opening information and the motor speed. This can be understood as follows: each opening information corresponds to a specific motor speed; therefore, once the current opening information is determined, the corresponding target motor speed is also uniquely determined.

[0078] 405. Control the motor to increase or decrease the power head based on the target motor speed.

[0079] Specifically, after determining the target motor speed, the motor needs to be controlled to operate at the target motor speed, thereby adjusting the lifting or lowering speed of the power head to match the opening of the operating handle.

[0080] Specifically, adjusting the moving speed of the power head, i.e., adjusting the target motor speed, can be achieved by determining the hydraulic oil flow rate of the main pump based on the current opening information; then, based on the main pump's hydraulic oil flow rate, controlling the motor to raise or lower the power head at the target motor speed. Since the motor speed is controlled by the hydraulic oil flow rate, the motor speed can be increased by adjusting the motor's hydraulic oil flow rate. Increasing the motor's hydraulic oil flow rate requires adjusting the main pump's flow rate, and then further adjusting the motor's hydraulic oil flow rate, ultimately achieving the adjustment of the motor speed.

[0081] The workflow, starting with the operator controlling the operating handle, is as follows: the operator moves the handle to achieve different opening degrees. After converting the opening information into electrical signals, the controller determines the corresponding target motor speed based on this information. Therefore, it is necessary to control the motor to operate at the target speed. This control is achieved by controlling the hydraulic oil flow rate of the main pump. By controlling the hydraulic oil flow rate of the main pump, the hydraulic oil flow rate of the motor is adjusted, thereby controlling the motor to operate at the target speed to raise or lower the power head.

[0082] Furthermore, based on the above embodiments, before detecting the current opening information of the operating handle in this embodiment, the method further includes: determining the opening range of the operating handle; dividing the opening range into a preset number of opening intervals; establishing a correspondence between the opening information and the applied pressure for each opening interval, and / or establishing a correspondence between the opening information and the motor speed.

[0083] Specifically, the opening degree of the operating handle has a certain range. Similarly, the magnitude of the applied pressure and the motor speed also have certain ranges. That is, the opening degree of the operating handle will not increase indefinitely, nor will the applied pressure and motor speed. In order to better establish the correspondence between opening information and applied pressure, it is necessary to accurately determine the range of the operating handle opening degree and the range of applied pressure. Likewise, in order to better establish the correspondence between opening information and motor speed, it is necessary to accurately determine the range of the operating handle opening degree and the range of motor speed.

[0084] Figure 5 This is a schematic diagram illustrating the principle of the correspondence between opening information and applied pressure provided by the present invention. Figure 6 This is a schematic diagram illustrating the principle of the correspondence between the opening information and the motor speed provided by this invention.

[0085] like Figure 5 As shown, when the opening information of the operating handle is within 5%, no pressure is applied, which can solve the problem of accidental contact with the operating handle. When the opening of the operating handle is between 5% and 90%, the opening information and the applied pressure are directly proportional. As the opening increases, the applied pressure gradually increases. When the opening information reaches 90%, the applied pressure reaches its maximum value. Even if the opening information of the operating handle continues to increase, the applied pressure will no longer change.

[0086] Similarly, such as Figure 6 As shown, when the opening information of the operating handle is within 5%, there is no motor speed, which can solve the problem of accidental touch of the operating handle. When the opening information of the operating handle is between 5% and 90%, the opening information and the motor speed are directly proportional. As the opening increases, the motor speed gradually increases. When the opening information reaches 90%, the motor speed reaches its maximum value. Even if the opening information of the operating handle continues to increase, the motor speed will no longer change.

[0087] From the perspective of actively applying pressure control, the entire workflow is as follows: detect the current opening information of the operating handle, determine the current opening range corresponding to the current opening information, use the correspondence within the current opening range to determine the target pressure corresponding to the current opening information, determine the pressure current of the proportional relief valve based on the correspondence between the target pressure and the pressure current, and control the proportional relief valve to operate with the pressure current in order to adjust the motor pressure through the target pressure.

[0088] By controlling the opening of the operating handle, both the lowering or raising speed of the power head and the applied pressure of the motor can be controlled. This allows for flexible control of the applied pressure and the lowering or raising speed of the power head based on the opening of the operating handle. Compared to a fixed applied pressure, the adjustment method is more flexible and the operation is simpler, improving the operator's experience and increasing work efficiency.

[0089] Based on the same general inventive concept, this invention also protects a pressure control device. The pressure control device provided by this invention will be described below. The pressure control device described below and the pressure control method described above can be referred to in correspondence.

[0090] Figure 7 This is a schematic diagram of the pressure control device provided by the present invention.

[0091] like Figure 7 As shown, the present invention provides a pressure control device, comprising:

[0092] The detection module 701 is used to detect the current opening information of the operating handle;

[0093] The determination module 702 is used to determine the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure.

[0094] The control module 703 is used to control the proportional relief valve to adjust the motor pressure based on the target applied pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0095] This embodiment provides a pressure control device that detects the current opening information of the operating handle; determines the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure; and controls a proportional relief valve to adjust the motor pressure based on the target pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor. Since the adjustment method of the motor pressure is determined by the opening information of the operating handle, the operator only needs to control different openings of the operating handle to control different pressures applied to the motor, simplifying the pressure operation and thus effectively improving the efficiency of construction work.

[0096] Furthermore, the detection module 701 in this embodiment is specifically used for:

[0097] Determine the secondary pilot pressure output by the operating handle;

[0098] The current opening information of the operating handle is determined based on the secondary pilot pressure.

[0099] Furthermore, the control module 703 in this embodiment is specifically used for:

[0100] Determine the pressurization current based on the target pressurization pressure;

[0101] The proportional relief valve is controlled to regulate the motor pressure using the pressurized current.

[0102] Furthermore, this embodiment also includes a speed adjustment module, used for:

[0103] Based on the correspondence between the opening information and the motor speed, the target motor speed corresponding to the current opening information is determined;

[0104] The control motor increases or decreases the power head based on the target motor speed.

[0105] Furthermore, the speed adjustment module in this embodiment is specifically used for:

[0106] Based on the current opening information, determine the hydraulic oil flow rate of the main pump;

[0107] Based on the hydraulic oil flow rate of the main pump, the motor is controlled to raise or lower the power head at the target motor speed.

[0108] Furthermore, this embodiment also includes a creation module, used for:

[0109] Determine the opening range of the operating handle;

[0110] The opening range is divided into a preset number of opening intervals;

[0111] For each of the aforementioned opening intervals, establish a correspondence between opening information and applied pressure, and / or establish a correspondence between opening information and motor speed.

[0112] Furthermore, in this embodiment, the minimum target applied pressure is greater than the operating pressure for raising or lowering the power head.

[0113] Based on the same general inventive concept, the present invention also protects a hydraulic system for performing a pressure control method as described in any of the above embodiments or including a pressure control device as described in any of the above embodiments.

[0114] Based on the same general inventive concept, the present invention also protects a working machine, which includes a hydraulic system as described in the above embodiments, wherein the working machine includes a rotary drilling rig, etc.

[0115] Figure 8 This is a schematic diagram of the structure of the electronic device provided by the present invention.

[0116] like Figure 8As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute a pressure control method. This method includes: detecting the current opening information of the operating handle; determining the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure; and controlling a proportional relief valve to adjust the motor pressure based on the target pressure. The hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0117] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0118] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the pressure control method provided by the above methods. The method includes: detecting the current opening information of the operating handle; determining the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure; and controlling a proportional relief valve to adjust the motor pressure based on the target pressure, wherein the hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0119] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the pressure control method provided by the above methods, the method comprising: detecting current opening information of an operating handle; determining a target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure; controlling a proportional relief valve to adjust the motor pressure based on the target pressure, wherein the hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor.

[0120] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0121] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure control method, characterized in that, include: Detect the current opening information of the operating handle; The current opening information refers to the opening degree of the operating handle at the current moment, and the current opening information is a real-time changing value; The detection of the current opening information of the operating handle includes: determining the secondary pilot pressure output by the operating handle; determining the current opening information of the operating handle based on the secondary pilot pressure; the secondary pilot pressure and the opening information of the operating handle are linearly related; the current opening information includes the opening size and the opening direction; the opening size is used to control the magnitude of the motor pressure; and the opening direction is used to control the lifting or lowering of the power head. Based on the correspondence between opening information and applied pressure, the target applied pressure corresponding to the current opening information is determined; The proportional relief valve is controlled to adjust the motor pressure based on the target applied pressure, and the hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor; the control of the proportional relief valve to adjust the motor pressure based on the target applied pressure includes: determining the applied pressure current according to the target applied pressure; and controlling the proportional relief valve to adjust the motor pressure with the applied pressure current. Before detecting the current opening information of the operating handle, the method further includes: Determine the opening range of the operating handle; The opening range is divided into a preset number of opening intervals; For each of the aforementioned opening intervals, establish a correspondence between opening information and applied pressure, and / or establish a correspondence between opening information and motor speed.

2. The pressure control method according to claim 1, characterized in that, After detecting the current opening information of the operating handle, the method further includes: Based on the correspondence between the opening information and the motor speed, the target motor speed corresponding to the current opening information is determined; The control motor increases or decreases the power head based on the target motor speed.

3. The pressure control method according to claim 2, characterized in that, The control motor increases or decreases the power head based on the target motor speed, including: Based on the current opening information, determine the hydraulic oil flow rate of the main pump; Based on the hydraulic oil flow rate of the main pump, the motor is controlled to raise or lower the power head at the target motor speed.

4. The pressure control method according to claim 1, characterized in that, The minimum target applied pressure is greater than the operating pressure required for the power head to lift or lower.

5. A pressure control device, characterized in that, include: The detection module is used to detect the current opening information of the operating handle; the current opening information refers to the opening of the operating handle at the current moment, and the current opening information is a real-time changing value; the detection module is specifically used to determine the secondary pilot pressure output by the operating handle; based on the secondary pilot pressure, the current opening information of the operating handle is determined; the secondary pilot pressure and the opening information of the operating handle have a linear relationship, and the current opening information includes the opening size and opening direction, the opening size is used to control the magnitude of the motor pressure, and the opening direction is used to control the lifting or lowering of the power head; Before detecting the current opening information of the operating handle, the method further includes: determining the opening range of the operating handle; dividing the opening range into a preset number of opening intervals; establishing a correspondence between opening information and applied pressure for each opening interval, and / or establishing a correspondence between opening information and motor speed. The determination module is used to determine the target pressure corresponding to the current opening information based on the correspondence between the opening information and the pressure applied. The control module is used to control the proportional relief valve to adjust the motor pressure based on the target applied pressure, wherein the hydraulic circuit of the proportional relief valve is connected to the hydraulic circuit of the motor; specifically, the control module is used to determine the applied pressure current according to the target applied pressure; and control the proportional relief valve to adjust the motor pressure with the applied pressure current.

6. A hydraulic system, characterized in that, The hydraulic system is used to perform the pressure control method as described in any one of claims 1-4 or includes the pressure control device as described in claim 5.

7. A type of operating machinery, characterized in that, The operating machinery includes the hydraulic system as described in claim 6.

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