High-precision pressure regulating control method and isostatic pressing device

Abstract

The application discloses a high-precision pressure regulation control method and an isostatic pressure equipment, and belongs to the technical field of battery manufacturing equipment. The control method comprises the following steps: acquiring a pressure detection signal in a pressurizing cabin chamber in real time; generating a regulation instruction based on a comparison result of the pressure detection signal and a preset pressure range; and selectively driving a pressure increasing part to supplement pressurizing medium to the chamber or driving a pressure relief part to release part of the pressurizing medium in the chamber according to the regulation instruction. The application further provides an isostatic pressure equipment for executing the control method. The control method and the equipment help to prevent high-pressure risks and guarantee that a workpiece completes a densification process under stable pressure conditions.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a high-precision pressure regulation and control method and an isostatic pressing device. Background Technology

[0002] Isostatic pressing involves placing the workpiece in a sealed pressurized chamber and applying uniform pressure in all directions using a high-pressure medium to densify and shape the workpiece.

[0003] During the isostatic pressing process, the pressure inside the pressurization chamber needs to be maintained within the preset process pressure range. If the pressure is too high, there is a risk of overpressure, which may damage the equipment or endanger the safety of the operators; if the pressure is too low, the expected densification effect cannot be achieved.

[0004] In related technologies, pressure relief valves and pressure detection devices are typically located on external pipelines connecting to the pressurization chamber. This decentralized layout results in low system integration, numerous pipeline connection points, and an increased risk of potential leakage. Furthermore, abruptly releasing pressure through direct depressurization can easily disturb the microstructure of the battery electrodes or cells, affecting the bonding effect and the consistency of the final performance. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a high-precision pressure regulation and control method and an isostatic pressing device.

[0006] In a first aspect, the high-precision pressure regulation and control method according to embodiments of the present invention includes the following steps: Real-time acquisition of pressure detection signals inside the pressurization chamber; Based on the comparison between the pressure detection signal and the preset pressure range, an adjustment command is generated; According to the adjustment command, the pressurization unit is driven to replenish the pressurization medium into the pressurization chamber, or the depressurization unit is driven to release part of the pressurization medium in the pressurization chamber, including: When the pressure value represented by the pressure detection signal is lower than the lower limit threshold of the preset pressure range, the booster unit is driven to replenish the pressurization medium into the pressurization chamber. When the pressure value indicated by the pressure detection signal exceeds the upper limit threshold of the preset pressure range, the pressure relief unit is activated to release a portion of the pressurized medium within the pressurization chamber.

[0007] The high-precision pressure regulation and control method according to embodiments of the present invention further includes: Before or during the start-up of the pressurization unit, acquire the status signal of the pressurization medium supply source; Based on the supply source status signal, preprocessing operations are performed on the medium supply source.

[0008] The high-precision pressure regulation and control method according to embodiments of the present invention includes a preprocessing operation comprising at least one of the following: When the medium level indicated by the supply source status signal is lower than the preset level, replenish the medium supply source with medium. When the medium temperature indicated by the supply source status signal is lower than the preset temperature, the medium in the medium supply source is heated.

[0009] According to an embodiment of the high-precision pressure regulation and control method of the present invention, the pressurization unit is connected to the chamber through a first pressurization pipeline and a second pressurization pipeline connected in parallel, and the pressurization unit is driven to supplement the chamber with pressurizing medium, including: In response to the initial injection command, the first and second pressurization lines are activated to simultaneously deliver pressurized medium to the chamber; And / or, In response to the pressure value represented by the pressure detection signal being lower than the preset rapid pressurization threshold, the first and second pressurization lines are activated to simultaneously deliver pressurized medium to the chamber.

[0010] The high-precision pressure regulation and control method according to embodiments of the present invention, which drives the pressurization unit to supplement the chamber with pressurizing medium, further includes at least one of the following methods: Under normal operating conditions, pressurized medium is delivered to the chamber through the first pressurization line. When a fault is detected in the first pressurization line or a maintenance command is received, the system switches to the second pressurization line to deliver pressurized medium to the chamber. Adjust the medium input flow rate of the first booster line and / or the second booster line based on the deviation between the pressure detection signal and the target pressure value.

[0011] According to an embodiment of the high-precision pressure regulation and control method of the present invention, the step of driving the pressure relief section to release part of the pressurized medium in the chamber includes: Obtain the rate of change of the pressure detection signal; Based on the rate of change, determine the pressure relief rate that matches the current operating conditions; Based on the determined depressurization rate, the opening degree or opening and closing frequency of the depressurization section is controlled so that the pressure in the pressurization chamber gradually drops back to the preset pressure range.

[0012] The high-precision pressure regulation and control method according to embodiments of the present invention further includes: When performing the pressure relief operation, the medium recovery cycle is started simultaneously; The pressurized medium released by the pressure relief section is guided to the medium recovery unit, and the recovered pressurized medium is driven to be filtered and returned to the medium supply source or the input end of the pressurization unit.

[0013] According to the high-precision pressure regulation and control method of the present invention, the pressure relief section includes two pressure relief valves arranged in parallel, and the method further includes: when either pressure relief valve responds to a control command to perform active pressure relief; or, The pressure relief unit includes a pressure relief valve and an overflow valve communicating with the chamber. The method further includes: when the overflow valve performs passive pressure relief when the chamber pressure exceeds its set pressure.

[0014] According to an embodiment of the present invention, a high-precision pressure regulation and control method includes a pressure boosting unit comprising a pressure booster and a hydraulic drive unit, wherein driving the pressure boosting unit to supplement the chamber with a pressurizing medium comprises: controlling the hydraulic drive unit to drive the pressure booster to pressurize the medium and delivering the pressurized medium to the chamber.

[0015] The high-precision pressure regulation and control method according to the present invention has at least the following beneficial effects: by acquiring the pressure detection signal in the pressurization chamber in real time and comparing it with the preset pressure range, an adjustment command is generated based on the comparison result to drive the pressurization unit to replenish pressure or drive the depressurization unit to depressurize.

[0016] The control method provided in this application helps maintain the pressure within the pressurization chamber within a preset range through closed-loop regulation, thus helping to avoid the adverse effects of drastic pressure fluctuations on the workpiece molding quality. While preventing high-pressure risks, it also helps ensure that the workpiece completes the densification process under stable pressure conditions, thereby improving the pressing effect and the consistency of molding quality of the product.

[0017] Secondly, according to an embodiment of the present invention, an isostatic pressing apparatus is used to perform the above-described high-precision pressure regulation and control method, comprising: A pressurization chamber, which has a cavity inside for containing pressurized media; A pressure detector is connected to the pressurization chamber, and the pressure detector is configured to detect the pressure inside the chamber and output a pressure signal; A pressurization unit is connected to the pressurization chamber, and the pressurization unit is configured to deliver a pressurizing medium into the chamber. A pressure relief section is connected to the pressurized chamber, and the pressure relief section is configured to release the pressure inside the chamber in a controlled manner; The controller is connected to the pressure detector, the pressure boosting unit, and the pressure relief unit respectively. The controller is configured to control the pressure boosting unit and / or the pressure relief unit to operate according to the pressure signal, so as to maintain the pressure in the chamber within a preset pressure range.

[0018] The isostatic pressure apparatus according to the embodiments of the present invention has at least the following beneficial effects: the isostatic pressure apparatus provided in this application integrates a pressure detector, a pressure boosting section, a pressure relief section and a controller, and the controller performs linkage control on the pressure boosting section and the pressure relief section based on the pressure signal fed back in real time by the pressure detector.

[0019] When the pressure inside the chamber is lower than the preset range, the controller controls the pressurization unit to supplement the pressurizing medium.

[0020] When the pressure inside the chamber exceeds the preset range, the controller controls the pressure relief section to release part of the medium.

[0021] This application uses a closed-loop regulation method to help avoid drastic pressure fluctuations. While preventing high pressure risks, it helps ensure that the workpiece completes the densification process under stable pressure conditions, thereby helping to improve the pressing effect and the consistency of molding quality of the product.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a flowchart of the main steps of the high-precision pressure regulation and control method according to an embodiment of the present invention; Figure 2 This is a flowchart of the sub-steps of the injection pretreatment in the high-precision pressure regulation and control method of this invention. Figure 3 This is a flowchart of the sub-steps of the pressure relief process in the high-precision pressure regulation and control method of this invention. Figure 4 This is a flowchart of the sub-steps of the cyclic recycling process in the high-precision pressure regulation and control method of this invention. Figure 5 This is a schematic diagram of the pressure regulating device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the plug structure according to an embodiment of the present invention; Figure 7 This is a partial structural diagram of the isostatic pressing device according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: 100 pressure chamber; 110 plug; 111 medium channel; 1111 first interface; 1112 second interface; 1113 third interface; Boosting unit 200; booster 210; hydraulic drive unit 220; check valve 230; Pressure relief valve 300; 400 relief valve; Circulation unit 500; Media recovery unit 510; Filter 520; Power pump 530; Medium supply source 600; 700-level replenishment valve; Feeding device 800; Feeding device 900. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of the invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If the terms "first" and "second" are used, they are only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0029] This application provides an isostatic pressing apparatus, which is mainly used for isostatic pressing of battery electrodes, cells, or solid-state battery modules. Additionally, this application also provides a high-precision pressure regulation and control method applied to the aforementioned isostatic pressing apparatus.

[0030] Specifically, refer to Figure 5 and Figure 7 The isostatic pressing equipment includes a pressure regulating device, a feeding device 800, a discharging device 900, and a controller.

[0031] A feeding device 800 is located at the inlet end of the pressure chamber 100 in the pressure regulating device, and is used to transport the workpiece to be processed into the cavity of the pressure chamber 100. A discharging device 900 is located at the outlet end of the pressure chamber 100, and is used to remove the workpiece that has undergone isostatic pressing from the cavity and transfer it to the subsequent process. By configuring the feeding device 800 and the discharging device 900, the flow process of the workpiece before and after pressurization is mechanized, which helps to reduce the labor intensity of manual handling. The specific form of the feeding device 800 and the discharging device 900 can be selected according to the production line layout and workpiece specifications, such as roller conveyor, push rod conveyor or robotic gripper, etc., and this application does not make specific limitations in this regard.

[0032] During isostatic pressing, the pressure chamber 100 needs to maintain a high pressure. Improper pressure control can lead to overpressure and safety accidents, while excessively low or unstable pressure directly affects the densification effect of the workpiece. In related technologies, pressure detection and depressurization components are often distributed in external pipelines, resulting in low integration. Furthermore, direct and rapid depressurization can negatively impact the uniformity of the microstructure within the battery electrodes or cells.

[0033] Therefore, referring to Figure 5 The pressure regulating device provided in this application includes a pressure chamber 100, a pressure detector, and a pressure regulating actuator.

[0034] The pressurization chamber 100 has a cavity for containing the pressurizing medium. During operation, the cavity is filled with the pressurizing medium and applies uniform pressure to the workpiece placed inside. A pressure detector is directly connected to the pressurization chamber 100, which can sense pressure changes within the cavity in real time and output corresponding pressure signals.

[0035] The controller establishes signal connections with both the pressure detector and the pressure regulating actuator. The controller receives the pressure signal output from the pressure detector and issues control commands to the pressure regulating actuator according to a preset pressure range.

[0036] The pressure regulating actuator includes a pressurizing section 200 and a pressure relieving section, both of which are connected to the pressurizing chamber 100. The pressurizing section 200 is used to deliver pressurizing medium into the chamber to increase the pressure, and the pressure relieving section is used to release the pressure in the chamber in a controlled manner to reduce the pressure.

[0037] In this embodiment, by controlling the pressure boosting section 200 and the pressure relief section in conjunction with the controller, the pressure in the chamber can be maintained within the preset process pressure range, which helps to avoid safety risks caused by excessive pressure and insufficient densification of the workpiece caused by excessively low pressure.

[0038] According to some embodiments of this application, at least one plug 110 is provided on the pressurization chamber 100. A medium channel 111 is formed inside the plug 110. At least one of the pressurization section 200 and the depressurization section communicates with the chamber of the pressurization chamber 100 through the medium channel 111.

[0039] The plug 110 serves as the connection medium between the pressurization section 200 and the pressure relief section and the pressurization chamber 100. It integrates the channels for medium input and output inside the plug 110, which helps to reduce the number of external pipelines and connection nodes, thereby helping to reduce the potential risk of medium leakage, while making the overall structure of the device more compact.

[0040] In some embodiments, the plug 110 can also serve as a door for the pressurization chamber 100. Specifically, the chamber of the pressurization chamber 100 has an opening for the entry and exit of the workpiece to be processed, and this opening is closed by the openable plug 110. When the plug 110 is in the closed position, its internal medium channel 111 remains in communication with the pressurization section 200 and / or the pressure relief section, enabling normal operation of the medium input and discharge functions. When it is necessary to load or unload workpieces, the plug 110 opens completely, exposing the opening of the chamber, at which point the plug 110 functions as a door. Integrating the plug 110 and the door into a single component helps to further simplify the overall structure of the pressurization chamber 100, reduce the number of independent openings on the chamber, and thus help to improve the pressure-bearing capacity and sealing reliability of the chamber.

[0041] In the practical application of this application, refer to Figure 5 The number of plugs 110 is set to two, namely the first plug and the second plug. The first plug can be used to communicate with at least one of the pressurization section 200 and the pressure relief section, and the second plug can also be used to communicate with at least one of the pressurization section 200 and the pressure relief section.

[0042] By setting two plugs 110, independent channels are provided for the input medium of the pressurization section 200 and the discharge medium of the pressure relief section. This allows for flexible configuration of the liquid inlet and outlet paths according to actual process requirements, and helps to improve the adaptability of the device in different application scenarios.

[0043] In some embodiments, when at least one of the two plugs 110 is used as the door of the pressurized chamber 100, the plug 110 used as the door can be set in a position that facilitates the loading and unloading of workpieces (e.g., the axial end of the pressurized chamber 100), while the other plug 110 can be fixedly set in other parts of the chamber or also set in an openable form, so as to ensure the function of the medium inlet and outlet channel while taking into account the operational convenience of loading and unloading workpieces.

[0044] In some embodiments, refer to Figure 6The medium channel 111 in the first plug and the medium channel 111 in the second plug are both constructed as T-junctions. Each T-junction has three interfaces: a first interface 1111, a second interface 1112, and a third interface 1113. The first interface 1111 communicates with the chamber of the pressurization chamber 100, the second interface 1112 communicates with the pressurization unit 200, and the third interface 1113 communicates with the depressurization unit.

[0045] The plug 110 with a three-way structure integrates the liquid inlet channel and the liquid outlet channel into a single component. The pressurization part 200 and the pressure relief part can establish a fluid connection with the chamber through the same plug 110, which helps to further simplify the interface layout of the pressurization chamber 100 and reduce the number of openings on the chamber, thereby helping to improve the structural strength and sealing reliability of the chamber.

[0046] During operation, when pressurization is required, the controller activates the pressurization unit 200. The pressurized medium enters the medium channel 111 through the second port 1112, which connects to the pressurization unit 200, in the three-way structure, and then enters the pressurization chamber 100 through the first port 1111. When depressurization is required, the controller opens the depressurization unit. The pressurized medium in the chamber enters the medium channel 111 through the first port 1111 and then flows out to the depressurization unit through the third port 1113. Pressurization and depressurization share the same medium channel 111 within the same plug 110, but perform different functions at different times without interfering with each other. Since both the first and second plugs adopt a three-way structure, both plugs 110 can independently realize pressurization input and depressurization output functions. Users can flexibly choose to use one plug 110 or both plugs 110 simultaneously for medium input and discharge operations according to actual pipeline layout requirements.

[0047] Furthermore, regarding the input of the pressurized medium, since both the first plug and the second plug are capable of communicating with the pressurization unit 200, this application can be configured as a dual-pipe input mode. Specifically, the output end of the pressurization unit 200 can be connected to the second interface 1112 of the first plug and the second interface 1112 of the second plug respectively through two parallel input pipes, and both input pipes can independently deliver pressurized medium into the chamber.

[0048] In this embodiment, the pressurization unit 200 is connected to the chamber via a first pressurization pipeline and a second pressurization pipeline connected in parallel. The two input pipelines can each perform different functional roles. One pipeline serves as the main input pipeline, responsible for the medium transport under normal operating conditions, while the other pipeline serves as a backup pipeline or a compensation pipeline.

[0049] When the main input pipeline is unable to operate normally due to maintenance, malfunction, or blockage, the system can switch to the backup pipeline to continue supplying the medium, helping to ensure production continuity. Alternatively, in situations requiring rapid pressurization or precise compensation for pressure fluctuations, both pipelines can be opened to supply the medium simultaneously, increasing the input flow rate and thus helping to shorten pressurization time or accelerate pressure recovery. The dual-pipeline input mode fully utilizes the structural feature that both plugs 110 have pressurization connection capabilities, helping to improve the adaptability and operational reliability of the unit under different operating conditions.

[0050] According to some embodiments of this application, the pressure relief section is specifically configured as a pressure relief valve 300.

[0051] In one embodiment, the pressure relief unit includes two pressure relief valves 300 arranged in parallel. When the pressure inside the chamber exceeds the upper limit threshold of a preset pressure range, the controller sends a control command to the pressure relief valve 300. Either pressure relief valve 300 responds to the control command by performing an active pressure relief operation, releasing part of the pressurized medium inside the chamber. The parallel arrangement of the two pressure relief valves 300 helps to increase the pressure relief flow rate, effectively shortening the pressure relief time in process scenarios requiring rapid pressure reduction, thus helping to improve production efficiency. At the same time, the two pressure relief valves 300 are redundant; even if one becomes blocked or malfunctions, the other can still maintain basic pressure relief functionality, helping to improve the operational reliability of the device.

[0052] In another embodiment, the pressure relief unit includes a pressure relief valve 300 and an overflow valve 400 communicating with the chamber. The pressure relief valve 300 is used to perform active pressure relief operation under the command of the controller. The overflow valve 400 is connected to the chamber as a passive safety protection element. When the pressure in the chamber exceeds the set opening pressure of the overflow valve 400, the overflow valve 400 automatically opens and releases the medium. The pressure relief valve 300 and the overflow valve 400 respectively undertake the functions of active pressure relief and passive overpressure protection. Their functions are independent and do not depend on each other, which helps to ensure the safety of the pressurization chamber 100 even in extreme cases of control system failure or failure of the pressure relief valve 300.

[0053] According to some embodiments of this application, refer to Figure 5 The booster unit 200 includes a booster 210 and a hydraulic drive unit 220.

[0054] The hydraulic drive unit 220 is connected to the booster 210. The hydraulic drive unit 220 provides driving force to the booster 210. Driven by the hydraulic drive unit 220, the booster 210 pressurizes the medium from the medium supply source 600 and delivers the pressurized medium to the chamber of the pressurization chamber 100. The booster 210 and the hydraulic drive unit 220 are separate units. The hydraulic drive unit 220 can be arranged independently of the pressurization chamber 100, which helps to reduce the structural complexity of the pressurization chamber 100. At the same time, the hydraulic drive method has the characteristics of high output pressure and stable operation, and is suitable for isostatic pressure processes that require high working pressure.

[0055] In some other embodiments, the pressurization unit 200 includes an electric booster pump. The input end of the electric booster pump is connected to the medium supply source 600, and the output end of the electric booster pump communicates with the chamber of the pressurization chamber 100. The electric booster pump integrates driving and pressurization functions, directly driving the pump body with a motor to pressurize the medium and deliver it to the chamber. Compared to hydraulic drive solutions, the electric booster pump has a more compact structure, helping to reduce the footprint of the device and the number of pipeline connections, facilitating modular installation and maintenance.

[0056] It should be noted that in both of the above embodiments, the operating state of the pressure boosting unit 200 is controlled by the controller based on the pressure signal fed back by the pressure detector. When the pressure inside the chamber is lower than the lower limit of the preset pressure range, the controller starts the pressure boosting unit 200 to replenish the pressure. When the pressure inside the chamber returns to the preset pressure range, the controller stops the operation of the pressure boosting unit 200.

[0057] In addition, it should be further noted that in practical applications, the specific type of pressurizing medium can be selected according to process requirements.

[0058] It should be further noted that, in practical applications, the specific type of pressurizing medium can be selected according to process requirements. The pressurizing medium is a fluid medium, including but not limited to liquid or gaseous media.

[0059] In the battery isostatic pressing process described in this application, high-temperature hot oil can be used as the pressurizing medium. Using high-temperature hot oil helps to uniformly heat the workpiece while pressurizing, thereby promoting the densification process of the material under high pressure and high temperature.

[0060] In other applications, other fluid media such as hydraulic oil or inert gas can also be used.

[0061] When the pressurizing medium is high-temperature hot oil, the selection of the booster unit 200 needs to comprehensively consider the temperature characteristics of the medium and safety factors. In the aforementioned embodiment where the booster 210 and the hydraulic drive unit 220 are separately configured, the booster 210 body can be made of high-temperature resistant material, while the hydraulic drive unit 220 can be arranged in an area far away from the high-temperature medium. The two are connected by hydraulic pipelines, and the high-temperature hot oil does not directly contact the drive unit, thus having good high-temperature adaptability and operational safety. At the same time, the hydraulic drive method can stably output ultra-high pressure, matching the pressure requirements of high-temperature hot oil isostatic processes. In the aforementioned embodiment of the electric booster pump, if it is used to transport high-temperature hot oil, the motor may be affected by the conduction or radiation of the high temperature of the medium, posing a risk of motor overheating. Furthermore, if the pump body seals age or fail due to high temperature, high-temperature hot oil may leak into the electrical component area, posing a certain safety hazard. Therefore, in applications where the medium is high-temperature hot oil, if an electric booster pump is selected, reliable heat insulation measures and high-temperature resistant sealing designs should be adopted, and effective heat dissipation protection should be provided for the motor.

[0062] Therefore, in specific implementation scenarios where the medium is high-temperature hot oil, this application preferably uses a combination of the booster 210 and the hydraulic drive unit 220.

[0063] According to some embodiments of this application, the pressure regulating device further includes a circulation unit 500.

[0064] Reference Figure 5 The circulation unit 500 includes a media recovery unit 510, a filter 520, and a power pump 530 connected in sequence. The input end of the media recovery unit 510 is connected to the output end of the pressure relief section, and it is used to receive the media released by the pressure relief section during the pressure relief process. The filter 520 is used to purify the recovered media, removing any impurity particles that may be mixed in. The input end of the power pump 530 is connected to the output end of the filter 520, and the power pump 530 is configured to deliver the media treated by the filter 520 to the input end of the media supply source 600 or the pressurization unit 200.

[0065] The circulation unit 500 allows the medium discharged during the pressure relief process to be recovered, purified, and reused, rather than being directly discharged as waste, which helps reduce medium consumption and operating costs. Simultaneously, the filter 520 intercepts impurities in the recovered medium, helping to prevent them from entering the pressurization unit 200 or the medium supply source 600, thereby protecting the normal operation of the precision components inside the pressurization unit 200 and extending the service life of the device.

[0066] In some embodiments, refer to Figure 5 A one-way valve 230 is provided on the medium conveying pipeline between the medium supply source 600 and the pressurization unit 200, and on the medium conveying pipeline between the pressurization unit 200 and the pressurization chamber 100.

[0067] The one-way valve 230, located between the medium supply source 600 and the pressurization unit 200, allows the medium to flow from the medium supply source 600 to the pressurization unit 200 while preventing backflow. This helps prevent the medium from flowing back into the medium supply source 600 when the pressurization unit 200 stops working or when there are pressure fluctuations, ensuring the stability of the liquid supply system. The one-way valve 230, located between the pressurization unit 200 and the pressurization chamber 100, allows the pressurized medium to flow from the pressurization unit 200 to the pressurization chamber 100 while preventing the high-pressure medium in the pressurization chamber 100 from flowing back into the pressurization unit 200. This helps prevent the reverse release of high-pressure medium in the pressurization chamber 100 during the pressurization unit 200's shutdown or pressure-holding phase, maintaining pressure stability within the chamber. It also helps protect the pressurization unit 200 from impact damage caused by high-pressure backflow.

[0068] In some embodiments, refer to Figure 5 The medium supply source 600 includes a housing and a heater. The housing is used to contain the medium, and the heater is used to heat the medium inside the housing. Preheating the medium helps to reduce its viscosity when it enters the pressurization section 200, thereby improving the intake efficiency and pressurization effect of the pressurization section 200, especially in low-temperature operating environments.

[0069] In some embodiments, the medium supply source 600 includes a tank, a heater, and a medium replenishment unit. The tank is used to contain the medium, the heater is used to heat the medium inside the tank, and the medium replenishment unit is connected to the tank to replenish the medium inside the tank. By providing the medium replenishment unit, the medium in the tank that has decreased due to long-term operation or pressure relief and recovery losses can be replenished in a timely manner, which helps to maintain a stable liquid level in the tank and ensures the continuity and reliability of the liquid supply from the pressurization unit 200.

[0070] The medium replenishment unit may include a replenishment valve 700, or the aforementioned circulation unit 500, or both the replenishment valve 700 and the circulation unit 500.

[0071] When the media replenishment unit includes a replenishment valve 700, the input end of the replenishment valve 700 is connected to an external media source, and the output end of the replenishment valve 700 is connected to the tank. The replenishment valve 700 can be configured as a manual valve or a solenoid valve. When the media level in the tank is lower than a preset value, the replenishment valve 700 is opened to introduce media from the external media source into the tank, thus completing the media replenishment.

[0072] When the circulation unit 500 is configured as a media replenishment unit, the output end of the power pump 530 in the circulation unit 500 is connected to the housing. The media discharged from the pressure relief section is collected by the media recovery unit 510, purified by the filter 520, and then transported back to the housing by the power pump 530. The circulation unit 500 simultaneously undertakes the dual functions of media recovery and purification and media replenishment, which helps to simplify the overall structural layout of the device.

[0073] When the media replenishment unit includes both a replenishment valve 700 and a circulation unit 500, the replenishment valve 700 provides a fresh media replenishment channel from an external media source, while the circulation unit 500 provides a channel for the reuse of recycled media. The two replenishment methods can be selected or used in combination depending on the actual operating conditions. For example, during the initial startup phase of the unit, the tank can be quickly filled using the replenishment valve 700; during normal operation, replenishment can be achieved using the circulation unit 500; and when media loss accumulates to a certain level, the replenishment valve 700 can be activated again to replenish new media. This helps to balance the continuity of unit operation and media utilization.

[0074] In some embodiments, the operation of the media replenishment unit and the heater can be linked to the liquid level and temperature detection within the tank. A liquid level sensor and a temperature sensor can be installed within the tank to detect the liquid level and temperature of the medium, respectively. When the liquid level sensor detects that the liquid level in the tank is lower than a preset lower limit, the controller, based on the received liquid level signal, controls the media replenishment unit (the replenishment valve 700 or the power pump 530 in the circulation unit 500) to replenish the medium into the tank until the liquid level returns to the preset working liquid level range. When the temperature sensor detects that the temperature of the medium in the tank is lower than a preset working temperature range, the controller controls the heater to start, heating the medium in the tank until the temperature reaches the preset temperature range. Through the joint monitoring and control of liquid level and temperature, it helps ensure that the media supply source 600 maintains suitable liquid level and temperature conditions during operation, thereby improving the stability of the liquid supply from the booster unit 200 and the overall operational reliability of the device.

[0075] The high-precision pressure regulation and control method provided in this application is applied to the aforementioned isostatic pressure equipment, with reference to... Figure 1 The control method mainly includes the following steps: First, the pressure detection signal inside the pressurization chamber 100 is acquired in real time. The pressure detector is directly connected to the pressurization chamber 100, which senses the pressure changes inside the chamber in real time and outputs the corresponding pressure signal. The controller receives this pressure detection signal as the basis for subsequent regulation.

[0076] Next, based on the comparison between the pressure detection signal and the preset pressure range, an adjustment command is generated. The controller compares the pressure value represented by the real-time acquired pressure detection signal with the preset pressure range.

[0077] When the pressure value represented by the pressure detection signal is lower than the lower limit threshold of the preset pressure range, the controller generates a pressure adjustment command to drive the pressurization unit 200 to supplement the pressurization medium into the pressurization chamber 100.

[0078] When the pressure value represented by the pressure detection signal is higher than the upper limit threshold of the preset pressure range, the controller generates a pressure relief adjustment command to drive the pressure relief section to release part of the pressurized medium in the pressurization chamber 100.

[0079] The pressure inside the chamber is maintained within the preset pressure range through the closed-loop regulation method described above.

[0080] According to some embodiments of this application, refer to Figure 2 The control method also includes pretreatment of the pressurized medium.

[0081] Specifically, before or during the start-up of the pressurization unit 200, the controller acquires the status signal of the pressurization medium supply source 600. The status signal of the medium supply source 600 can be acquired by a liquid level sensor and a temperature sensor installed inside the tank, which respectively characterize the liquid level and temperature of the medium.

[0082] Based on the supply source status signal, the controller performs preprocessing operations on the medium supply source 600.

[0083] When the medium level indicated by the supply source status signal is lower than the preset level, the controller controls the medium replenishment unit to replenish the medium supply source 600. The medium replenishment unit can be a replenishment valve 700, a power pump 530 in the circulation unit 500, or a combination of both.

[0084] When the medium temperature indicated by the supply source status signal is lower than the preset temperature, the controller controls the heater to start and heat the medium in the medium supply source 600.

[0085] The above pretreatment operations help ensure that the medium entering the pressurization unit 200 has suitable liquid level and temperature conditions, thereby helping to improve the stability of the liquid supply and pressurization efficiency of the pressurization unit 200.

[0086] According to some embodiments of this application, corresponding to the structure in which the aforementioned pressurizing unit 200 is connected to the chamber via a parallel first pressurizing pipeline and a second pressurizing pipeline, the control method for driving the pressurizing unit 200 to supplement the chamber with pressurizing medium includes at least one of the following: In response to the initial injection command, the first and second pressurization lines are activated to simultaneously deliver pressurized medium; In response to the pressure value represented by the pressure detection signal being lower than the preset rapid pressurization threshold, the first pressurization line and the second pressurization line are activated to simultaneously deliver pressurized medium.

[0087] Understandably, the initial injection command typically corresponds to the device startup phase, at which point the chamber is either not yet filled with pressurized medium or is in a vented state. If injection is performed through only a single pipeline, the injection rate is slow, and the time required to reach the working pressure is long. By simultaneously activating the first and second pressurized pipelines in response to the initial injection command, the pressurized medium is delivered in parallel through both pipelines, which helps to increase the injection flow rate, shorten the initial injection time, and thus allow the chamber pressure to reach the working range more quickly.

[0088] In addition, the preset rapid pressurization threshold is typically set to a pressure value significantly lower than the lower limit of the normal process pressure range. When the pressure value represented by the pressure detection signal is lower than this threshold, it indicates a severe shortage of pressure within the chamber, possibly due to workpiece volume compression, minor leaks, or other factors. In this case, if only a single pipeline is used for pressurization, the pressurization rate will be slow, and the workpiece may remain under low pressure for too long, potentially affecting the densification effect. By simultaneously activating dual pipelines to deliver the pressurizing medium in response to this condition, the pressurization rate can be accelerated, allowing the pressure to recover to the process range as quickly as possible. This helps reduce the exposure time of the workpiece under non-process pressures, ensuring molding quality.

[0089] The two methods mentioned above for triggering simultaneous operation of dual pipelines can be used individually or in combination to adapt to different operating conditions.

[0090] In some embodiments, a multi-way control valve is provided at the junction of the first and second pressurization pipelines. The input end of the multi-way control valve is connected to the output end of the pressurization unit 200, and the multiple output ends of the multi-way control valve are respectively connected to the first and second pressurization pipelines. The controller controls the valve core position of the multi-way control valve or the on / off state of each output end to realize single-pipeline delivery, simultaneous dual-pipeline delivery, or pipeline switching functions. The centralized control structure helps to reduce the number of control valves, simplify pipeline layout, and reduce the complexity of the control system.

[0091] In some other embodiments, a first control valve is provided on the first booster pipeline, and a second control valve is provided on the second booster pipeline. The first and second control valves are respectively connected to the controller via signal connections. The controller controls the on / off state or opening degree of each pipeline by sending independent control commands to the first and second control valves, allowing each pipeline to be independently adjustable and providing more flexible control. For example, when both pipelines are working simultaneously, the flow rate ratio of each pipeline can be adjusted separately, or seamless connection can be achieved during main / standby switching.

[0092] The specific choice can be made based on the spatial layout of the equipment, cost requirements, and control precision requirements; this application does not impose any specific limitations.

[0093] According to some embodiments of this application, the drive booster unit 200 replenishes the chamber with pressurizing medium, and further includes at least one of the following control methods: Under normal operating conditions, pressurized medium is delivered through the first pressurization line. When a fault is detected in the first pressurization line or a maintenance command is received, the system switches to the second pressurization line to deliver the pressurized medium. Adjust the medium input flow rate of the first booster line and / or the second booster line based on the deviation between the pressure detection signal and the target pressure value.

[0094] It is understandable that in the first control method mentioned above, the first pressurization pipeline is used as the main working pipeline, and the second pressurization pipeline is used as the backup pipeline.

[0095] Under normal operating conditions, pressurized media are delivered only through the first pressurization line, while the second pressurization line remains in standby mode. The controller can determine whether the first pressurization line is malfunctioning (e.g., blocked, leaking, or valve malfunction) by monitoring the line flow, pressure, or valve status, or it can actively switch lines based on maintenance commands input by the operator. When a fault is detected or a maintenance command is received, the controller switches the media delivery path from the first pressurization line to the second pressurization line, which then takes over from the first pressurization line to continue delivering pressurized media to the chamber.

[0096] The main / standby switching control method helps to ensure the continuity of production. When the first booster pipeline needs maintenance or becomes blocked, the standby pipeline can immediately take over the medium delivery task, avoiding downtime or process interruption due to pipeline failure.

[0097] In the second control method described above, the controller dynamically adjusts the medium input flow rate of the first booster pipeline and / or the second booster pipeline based on the deviation between the pressure detection signal and the target pressure value.

[0098] For example, when the deviation between the pressure detection signal and the target pressure value is small, it indicates that only minor adjustments are needed to the pressure inside the chamber. In this case, pressure can be replenished through a single pipeline at a small flow rate, which helps to achieve precise pressure regulation and avoid overshoot. When the deviation is large, dual pipelines can be used for rapid pressure replenishment at a larger flow rate, which helps to shorten the pressure recovery time. When the deviation is in the intermediate range, a single pipeline can be used for pressure replenishment at a medium flow rate, or dual pipelines can be used and the flow rate of each pipeline can be adjusted separately to match the actual needs.

[0099] By adjusting the flow rate according to the pressure deviation, more precise pressure control can be achieved, allowing the pressure in the chamber to be maintained more stably within the preset range.

[0100] According to some embodiments of this application, refer to Figure 3 The step of driving the pressure relief section to release part of the pressurized medium in the chamber includes a controlled and gradual pressure relief process.

[0101] Specifically, the controller acquires the rate of change of the pressure detection signal. This rate of change reflects the speed at which the pressure inside the chamber rises or falls.

[0102] The controller determines the pressure relief rate that matches the current operating conditions based on the rate of change.

[0103] For example, a large rate of change indicates a rapid pressure rise, requiring a faster rate of pressure relief to suppress overpressure tendencies. Conversely, a small rate of pressure relief can be used to maintain pressure stability.

[0104] The controller controls the opening degree or opening and closing frequency of the pressure relief section according to the determined pressure relief rate, so that the pressure in the pressurization chamber 100 gradually drops back to the preset pressure range.

[0105] Understandably, the rate of change of the pressure detection signal reflects the speed at which the pressure in the chamber rises or falls. A large rate of change indicates a rapid pressure rise, and a fixed depressurization rate may not effectively suppress the overpressure trend. Conversely, a small rate of change, if the depressurization rate is too fast, may cause excessive pressure recovery, resulting in pressure fluctuations.

[0106] The controller dynamically determines the pressure relief rate based on the rate of change. For example, when the rate of change is large, a faster pressure relief rate is used to quickly suppress overpressure, while when the rate of change is small, a slower pressure relief rate is used to smoothly reduce pressure. The pressure relief rate can be adjusted by controlling the opening degree of the pressure relief section (e.g., adjusting the valve opening angle) or the opening and closing frequency (e.g., the ratio of pulse opening and closing time).

[0107] Compared to sudden pressure relief, a controlled and gradual pressure relief process based on the rate of change helps to avoid microstructural damage to the workpiece caused by a sudden drop in pressure, thereby helping to ensure the pressing quality of the product.

[0108] According to some embodiments of this application, refer to Figure 4 The control method also includes: simultaneously initiating a medium recovery cycle when performing a pressure relief operation.

[0109] Specifically, the control method includes: guiding the pressurized medium released by the pressure relief section to the medium recovery unit 510; driving the power pump 530 to transport the recovered medium through the pipeline to the filter 520; and transporting the filtered medium to the input end of the medium supply source 600 or the pressurization unit 200.

[0110] Understandably, the pressure relief operation and the media recovery cycle are initiated simultaneously, ensuring that the pressurized media discharged during the pressure relief process is not directly discarded but collected by the media recovery unit 510. The collected media may contain impurity particles introduced during contact with the workpiece within the chamber, thus requiring purification through the filter 520. After the filter 520 intercepts impurities in the media, the purified media is driven by the power pump 530 and transported via pipeline to the media supply source 600 or directly to the input end of the pressurization unit 200, re-entering the pressurization cycle. This media recovery cycle helps reduce media consumption and operating costs. Simultaneously, the filter 520's interception of impurities in the recovered media helps prevent impurities from entering the pressurization unit 200 or the media supply source 600, thereby protecting the normal operation of the precision components inside the pressurization unit 200 and extending the device's service life.

[0111] According to some embodiments of this application, corresponding to the two optional configurations of the aforementioned pressure relief section, the steps of driving the pressure relief section to release the pressurized medium respectively include: When the pressure relief section is configured with two pressure relief valves 300 arranged in parallel, the control method includes: sending a control command to either pressure relief valve 300 to perform active pressure relief; When the pressure relief section is configured as a pressure relief valve 300 and an overflow valve 400 communicating with the chamber, the control method includes: sending a control command to the pressure relief valve 300 to perform active pressure relief, and when the chamber pressure exceeds the set pressure of the overflow valve 400, the overflow valve 400 automatically performs passive pressure relief.

[0112] It is understood that in the first configuration described above, the pressure relief unit includes two pressure relief valves 300 arranged in parallel. When active pressure relief is required, the controller can send a control command to either pressure relief valve 300, which opens in response to the control command, releasing part of the pressurized medium in the chamber. The two pressure relief valves 300 can operate simultaneously to increase the pressure relief flow, or they can operate alternately to balance the service life of each valve. Furthermore, if one pressure relief valve 300 fails, the other pressure relief valve 300 can continue to perform the pressure relief task. This helps to increase the pressure relief flow and provide redundant protection, effectively shortening the pressure relief time in process scenarios requiring rapid pressure reduction, and also helps to improve the reliability of the pressure relief function.

[0113] In the second configuration described above, the pressure relief unit includes a pressure relief valve 300 and an overflow valve 400 communicating with the chamber. The pressure relief valve 300 performs active pressure relief operations under controller commands; that is, when the controller determines that pressure relief is needed based on a pressure detection signal, it sends a control command to the pressure relief valve 300 to open it. The overflow valve 400 serves as a passive safety protection element, and its set pressure is typically set to an upper limit threshold slightly higher than the preset pressure range. During normal operation, the chamber pressure is actively regulated by the controller via the pressure relief valve 300. When an abnormal situation occurs (such as control system failure, pressure relief valve 300 jamming and not responding normally, or pressure surge exceeding the controller's control capability) causing the chamber pressure to rise continuously and exceed the set pressure of relief valve 400, relief valve 400 will automatically open under the direct action of the medium pressure, releasing part of the medium to reduce the pressure. After the pressure drops back below the set pressure, it will automatically close. This combines active pressure relief with passive overpressure protection. The two functions are independent and do not depend on each other, which helps to ensure the safety of pressurization chamber 100 even in extreme cases of control system failure or pressure relief valve 300 failure.

[0114] According to some embodiments of this application, corresponding to the aforementioned pressurization unit 200 including a pressurizer 210 and a hydraulic drive unit 220, the step of driving the pressurization unit 200 to supplement the chamber with pressurized medium includes: the controller controls the hydraulic drive unit 220 to operate, so as to drive the pressurizer 210 to pressurize the medium and deliver the pressurized medium to the chamber.

[0115] Understandably, the controller sends control commands to the hydraulic drive unit 220, which outputs driving force according to the commands to drive the booster 210 to pressurize the medium from the medium supply source 600. Driven by the hydraulic drive unit 220, the booster 210 transports the pressurized high-pressure medium through pipelines to the chamber of the pressurization chamber 100. The hydraulic drive unit 220 and the booster 210 are separate units; the hydraulic drive unit 220 can be arranged independently of the pressurization chamber 100. The controller can control the hydraulic drive unit 220 via electrical or hydraulic signals, featuring high output pressure and stable operation, which helps to achieve stable pressure output.

[0116] In summary, the working principle of the high-precision pressure regulation and control method and isostatic pressure device provided in this application is as follows: First, the feeding device 800 conveys the workpiece to be processed from the feed end into the cavity of the pressurization chamber 100. If the plug 110 also serves as a door, the plug 110 used as a door is closed, sealing the chamber opening. If the plug 110 only serves as a medium inlet / outlet channel and does not also serve as a door, the chamber is sealed by a separate door or end cap. Subsequently, the cavity of the pressurization chamber 100 forms a sealed space.

[0117] Next, the controller initiates operation of the booster unit 200. Before or during the operation of the booster unit 200, the level and temperature sensors inside the media supply source 600 continuously monitor the level and temperature of the media.

[0118] When the liquid level is below the preset lower limit, the controller controls the medium replenishment unit to replenish the medium into the tank. When the temperature is below the preset operating temperature range, the controller controls the heater to heat the medium in the tank to ensure that the medium entering the pressurization section 200 has suitable liquid level and temperature conditions.

[0119] In response to the initial injection command, the controller activates the first and second pressurization lines to simultaneously deliver pressurized medium to the chamber, thereby quickly completing the initial injection process.

[0120] The pressurization unit 200 draws media from the media supply source 600. The media flows through a one-way valve 230 located between the media supply source 600 and the pressurization unit 200. This one-way valve 230 allows the media to flow unidirectionally to the pressurization unit 200, preventing backflow. After being pressurized, the media becomes a high-pressure medium and then flows through another one-way valve 230 located between the pressurization unit 200 and the pressurization chamber 100. This one-way valve 230 allows the high-pressure medium to enter the chamber unidirectionally, preventing reverse leakage of the high-pressure medium from the chamber.

[0121] High-pressure medium enters the chamber of pressurization chamber 100 through medium channel 111 inside plug 110. Pressure detector monitors the pressure changes in the chamber in real time and continuously feeds back the pressure signal to the controller.

[0122] When the pressure value represented by the pressure signal reaches the lower limit of the preset pressure range, the controller maintains the operation of the booster unit 200, allowing the pressure to continue to rise. When the pressure value enters the preset pressure range, the controller controls the booster unit 200 to stop boosting or switch to a pressure holding and replenishment mode.

[0123] During the pressure holding stage, the workpiece undergoes densification under uniform high pressure.

[0124] If high-temperature hot oil is selected as the pressurizing medium, the controller controls the hydraulic drive unit 220 to drive the booster 210 to pressurize the medium and deliver the pressurized medium to the chamber.

[0125] If the pressure inside the chamber drops below the lower limit of the preset pressure range due to workpiece volume compression or minor leakage, the pressure detector will feed back the detected pressure drop signal to the controller. The controller will then control the pressurization unit 200 to start and replenish the chamber with pressurizing medium to restore the pressure to the preset range.

[0126] During this process, if the pressure value represented by the pressure detection signal is lower than the preset rapid pressurization threshold, the controller activates the first pressurization line and the second pressurization line to simultaneously deliver pressurizing medium to the chamber in order to accelerate the pressurization speed.

[0127] Under normal operating conditions, the controller delivers pressurized medium to the chamber through the first pressurization line. When the controller detects a fault in the first pressurization line or receives a maintenance command, it switches to the second pressurization line to deliver pressurized medium to the chamber, ensuring continuous production.

[0128] The controller can also adjust the medium input flow rate of the first booster line and / or the second booster line based on the deviation between the pressure detection signal and the target pressure value, so as to achieve more precise pressure control.

[0129] If the pressure inside the chamber rises above the upper limit of the preset pressure range due to temperature changes or other factors, the controller will open the pressure relief section to release part of the pressurized medium.

[0130] During the depressurization process, the controller acquires the rate of change of the pressure detection signal, determines the depressurization rate that matches the current operating conditions based on the rate of change, and controls the opening degree or opening and closing frequency of the depressurization section according to the determined depressurization rate, so that the pressure in the pressurization chamber 100 gradually drops back to the preset pressure range.

[0131] Simultaneously, during the pressure relief operation, the controller synchronously initiates the media recovery cycle. The pressurized media released by the pressure relief unit is guided to the media recovery unit 510, driven by the power pump 530 and purified by the filter 520, before returning to the input end of the media supply source 600 or the pressurization unit 200, thus realizing the recycling of the media.

[0132] In the specific operation of the pressure relief section, if two pressure relief valves 300 are arranged in parallel, the controller sends a control command to the pressure relief valve 300, and either pressure relief valve 300 responds to the control command to perform active pressure relief. If one pressure relief valve 300 and one relief valve 400 are used, the pressure relief valve 300 performs active pressure relief, while the relief valve 400 automatically performs passive pressure relief when the chamber pressure exceeds its set pressure, providing independent overpressure protection for the pressurized chamber 100.

[0133] Once the pressure holding time meets the process requirements, the controller activates the pressure relief unit to perform controlled pressure relief. The pressure relief unit gradually releases the pressure within the chamber according to a preset pressure relief rate, allowing the pressure to drop smoothly to a safe opening value.

[0134] After depressurization is complete, the sealed chamber of the pressurization chamber 100 is opened. If the plug 110 also serves as a hatch, the plug 110 is opened. If a separate hatch is used, the hatch is opened.

[0135] The unloading device 900 removes the workpiece that has undergone isostatic pressing from the cavity and transfers it to the next process. This completes one work cycle.

[0136] Throughout the entire operation, the pressure detector is directly installed in the pressure chamber 100. The pressurization unit 200 and the pressure relief unit are connected to the chamber through the medium channel 111 within the plug 110. All components are tightly integrated into the body of the pressure chamber 100, reducing the use of external pipelines and helping to reduce the risk of leakage at pipeline connections. Based on the real-time feedback from the pressure detector, the controller performs linked closed-loop control of the pressurization unit 200 and the pressure relief unit, maintaining the pressure within the chamber within the preset process range. This helps prevent the risk of overpressure and provides a stable pressure environment for the workpiece, ensuring the consistency and reliability of the product molding quality.

[0137] The high-precision pressure regulation and control method and isostatic pressure equipment provided in this application acquire pressure detection signals in real time and compare them with a preset pressure range. Based on the comparison results, it selectively drives the pressure boosting unit 200 to replenish pressure or the pressure relief unit to release pressure, forming a closed-loop control mechanism. During the pressure boosting process, various control methods such as dual-pipeline parallel input, main / standby switching, and flow regulation can be adopted to adapt to different working conditions. During the pressure relief process, the pressure relief rate can be determined according to the pressure change rate to achieve smooth pressure relief and avoid disturbing the workpiece. At the same time, through media recovery and circulation, pretreatment operations, and pressure relief redundancy configuration, it helps to improve media utilization and device operational reliability. This control method and equipment help to ensure the forming quality of the workpiece while preventing high pressure risks.

[0138] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0139] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-precision pressure regulation and control method, characterized in that, include: Real-time acquisition of pressure detection signals within the pressurization chamber (100); Based on the comparison between the pressure detection signal and the preset pressure range, an adjustment command is generated; According to the adjustment command, the pressurization unit (200) is driven to replenish the pressurization medium into the pressurization chamber (100) or the depressurization unit is driven to release part of the pressurization medium in the pressurization chamber (100), including: When the pressure value represented by the pressure detection signal is lower than the lower limit threshold of the preset pressure range, the booster unit (200) is driven to replenish the pressurizing medium into the pressurization chamber (100); When the pressure value represented by the pressure detection signal is higher than the upper limit threshold of the preset pressure range, the pressure relief section is driven to release part of the pressurized medium in the pressurization chamber (100).

2. The high-precision pressure regulation and control method according to claim 1, characterized in that, Also includes: Before or during the start-up of the pressurization unit (200), the status signal of the pressurization medium supply source (600) is acquired; Based on the supply source status signal, a preprocessing operation is performed on the medium supply source (600).

3. The high-precision pressure regulation and control method according to claim 2, characterized in that, Preprocessing operations include at least one of the following: When the medium level indicated by the supply source status signal is lower than the preset level, the medium is replenished to the medium supply source (600); When the medium temperature indicated by the supply source status signal is lower than the preset temperature, the medium in the medium supply source (600) is heated.

4. The high-precision pressure regulation and control method according to claim 1, characterized in that, The pressurization unit (200) is connected to the chamber via a first pressurization line and a second pressurization line connected in parallel. The pressurization unit (200) is driven to replenish the chamber with pressurizing medium, including: In response to the initial injection command, the first and second pressurization lines are activated to simultaneously deliver pressurized medium to the chamber; And / or, In response to the pressure value represented by the pressure detection signal being lower than the preset rapid pressurization threshold, the first and second pressurization lines are activated to simultaneously deliver pressurized medium to the chamber.

5. The high-precision pressure regulation and control method according to claim 4, characterized in that, The booster unit (200) supplies pressurized medium to the chamber, and also includes at least one of the following methods: Under normal operating conditions, pressurized medium is delivered to the chamber through the first pressurization line. When a fault is detected in the first pressurization line or a maintenance command is received, the system switches to the second pressurization line to deliver pressurized medium to the chamber. Adjust the medium input flow rate of the first booster line and / or the second booster line based on the deviation between the pressure detection signal and the target pressure value.

6. The high-precision pressure regulation and control method according to claim 2, characterized in that, The step of driving the pressure relief section to release part of the pressurized medium in the chamber includes: Obtain the rate of change of the pressure detection signal; Based on the rate of change, determine the pressure relief rate that matches the current operating conditions; Based on the determined depressurization rate, the opening degree or opening and closing frequency of the depressurization section is controlled so that the pressure in the pressurization chamber (100) gradually drops back to the preset pressure range.

7. The high-precision pressure regulation and control method according to any one of claims 2 or 6, characterized in that, Also includes: When performing the pressure relief operation, the medium recovery cycle is started simultaneously; The pressurized medium released by the pressure relief section is guided to the medium recovery unit (510), and the recovered pressurized medium is driven to be filtered and returned to the input end of the medium supply source (600) or the pressure boosting unit (200).

8. The high-precision pressure regulation and control method according to claim 7, characterized in that, The pressure relief section includes two pressure relief valves (300) arranged in parallel, and the method further includes: when either pressure relief valve (300) responds to a control command to perform active pressure relief; or, The pressure relief unit includes a pressure relief valve (300) and an overflow valve (400) communicating with the chamber. The method further includes: when the overflow valve (400) performs passive pressure relief when the chamber pressure exceeds its set pressure.

9. The high-precision pressure regulation and control method according to claim 1, characterized in that, The pressurization unit (200) includes a pressurizer (210) and a hydraulic drive unit (220) to drive the pressurization unit (200) to replenish the chamber with pressurized medium, including: controlling the hydraulic drive unit (220) to drive the pressurizer (210) to pressurize the medium and deliver the pressurized medium to the chamber.

10. An isostatic pressure apparatus, used to execute the high-precision pressure regulation and control method according to any one of claims 1 to 9, characterized in that, include: A pressurization chamber (100) having an interior chamber for containing a pressurized medium; A pressure detector is connected to the pressurization chamber (100), the pressure detector being configured to detect the pressure inside the chamber and output a pressure signal; A pressurization unit (200) is connected to the pressurization chamber (100), and the pressurization unit (200) is configured to deliver a pressurizing medium into the chamber; A pressure relief section is connected to the pressurized chamber (100), and the pressure relief section is configured to release the pressure inside the chamber in a controlled manner; The controller is connected to the pressure detector, the pressure boosting unit (200), and the pressure relief unit respectively. The controller is configured to control the pressure boosting unit (200) and / or the pressure relief unit to operate according to the pressure signal, so as to maintain the pressure in the chamber within a preset pressure range.

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