Hydraulic tool and hydraulic tool control method
By connecting the controller to the pressure relief valve and using the solenoid valve lever mechanism, the problem of incomplete pressure relief and slow pressure relief speed in the hydraulic tool's fluid chamber is solved, achieving complete fluid release and improved pressure relief speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU DONGCHENG TOOLS TECH CO LTD
- Filing Date
- 2024-10-22
- Publication Date
- 2026-04-24
AI Technical Summary
The problem with existing hydraulic tools is that the fluid in the hydraulic chamber cannot be completely depressurized and the depressurization speed is slow.
The hydraulic tool design employs an electrical connection between the controller and the pressure relief valve. The hydraulic push rod is moved within the hydraulic chamber by an elastic element. When the hydraulic tool is performing pressure relief work, the controller outputs a signal to the pressure relief valve to control the opening of the pressure relief port. Combined with a solenoid valve and lever mechanism, active pressure relief is achieved.
This achieves complete release of liquid from the liquid chamber and increases the pressure relief speed, preventing the pressure relief port from shrinking as the elastic force decreases, thus improving the pressure relief efficiency.
Smart Images
Figure CN121916210A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hydraulic tool technology, and in particular to a hydraulic tool and a hydraulic tool control method. Background Technology
[0002] In practical applications, hydraulic tools generate pressure by driving a hydraulic push rod through a motor. When the pressure in the hydraulic chamber reaches a certain value, the mechanical pressure relief valve is opened to release pressure. However, as the liquid in the hydraulic chamber decreases, the elastic force of the elastic element in the hydraulic push rod decreases, and the mechanical pressure relief valve does not have sufficient pressure to maintain the pressure relief port. The pressure relief port of the hydraulic tool will gradually decrease, so that the liquid in the hydraulic chamber cannot be completely depressurized, and the pressure relief speed is slow. Summary of the Invention
[0003] In view of the above, this application provides a hydraulic tool and a hydraulic tool control method, which can solve the problems in the prior art where the liquid in the hydraulic cavity cannot be completely depressurized and the depressurization speed is slow.
[0004] The first aspect of this application provides a hydraulic tool, including: a controller, a hydraulic push rod, an elastic element, a liquid chamber, and a pressure relief valve. The controller is electrically connected to the pressure relief valve, which is located at the pressure relief port of the liquid chamber. The elastic element is sleeved on the rod of the hydraulic push rod, which is disposed within the liquid chamber. The elastic element is used to push the hydraulic push rod to move within the liquid chamber when the hydraulic tool is performing pressure relief operations, thereby pushing the liquid in the liquid chamber through the pressure relief port to release pressure. The controller is configured to output a conduction signal to the pressure relief valve when the hydraulic tool is performing pressure relief operations, thereby controlling the pressure relief valve to open the pressure relief port.
[0005] As an optional implementation, the pressure relief valve includes a pressure relief valve core, a lever, and a solenoid valve. One end of the lever is connected to the pressure relief valve core, and the other end of the lever is connected to the solenoid valve, which is electrically connected to the controller. The solenoid valve is configured to respond to an on signal to displace the pressure relief valve core via the lever, thereby opening the pressure relief port.
[0006] As an optional implementation, the hydraulic tool also includes a motor drive module and a motor. The motor is electrically connected to the motor drive module, and the motor drive module is electrically connected to the controller. When the operating current value of the motor drive module changes abruptly, the controller is configured to output a conduction signal to the solenoid valve when the operating current value is less than a first preset current.
[0007] As an optional implementation, after a sudden change in the operating current value of the motor drive module, the controller is configured to output a conduction signal to the solenoid valve and a shutdown signal to the motor drive module when the operating current value is less than a first preset current.
[0008] As an optional implementation, after a sudden change in the operating current value of the motor drive module, the controller is configured to output a stop signal to the motor drive module when the operating current value is less than the second preset current, and output a shutdown signal to the solenoid valve after a preset time; the second preset current is less than the first preset current.
[0009] As an optional implementation, the hydraulic tool also includes a displacement monitoring module. The displacement monitoring module is electrically connected to the controller; when the pressure relief valve spool is displaced, the displacement monitoring module outputs a displacement signal to the controller.
[0010] As an optional implementation, the controller is configured to output a conduction signal to the solenoid valve in response to a displacement signal.
[0011] A second aspect of this application may also provide a hydraulic tool control method. The hydraulic tool includes a controller, a hydraulic push rod, an elastic element, a liquid chamber, and a pressure relief valve. The controller is electrically connected to the pressure relief valve, which is located at the pressure relief port of the liquid chamber. The elastic element is sleeved on the rod body of the hydraulic push rod, which is located inside the liquid chamber. The hydraulic tool control method includes: when the hydraulic tool is performing pressure relief work, the controller outputs a conduction signal to the pressure relief valve to control the pressure relief valve to open the pressure relief port.
[0012] As an optional implementation, the hydraulic tool also includes a motor drive module and a motor. The motor is electrically connected to the motor drive module, and the motor drive module is electrically connected to the controller. The controller controls the pressure relief valve to open the pressure relief port by: the controller monitoring the operating current value of the motor drive module; after a sudden change in the operating current value, the controller determining whether the operating current value is less than a first preset current; if the operating current value is less than the first preset current, the controller outputs a conduction signal to the pressure relief valve.
[0013] As an optional implementation, the hydraulic tool also includes a displacement monitoring module, which is electrically connected to the controller. When the hydraulic tool is performing pressure relief work, the hydraulic tool control method also includes: when the displacement monitoring module outputs a displacement signal, the controller controls the pressure relief valve to open the pressure relief port.
[0014] The hydraulic tool using this application includes: a controller, a hydraulic push rod, an elastic element, a liquid chamber, and a pressure relief valve; wherein, the controller is electrically connected to the pressure relief valve, the pressure relief valve is located at the pressure relief port of the liquid chamber, the elastic element is sleeved on the rod body of the hydraulic push rod, and the hydraulic push rod is located inside the liquid chamber; when the hydraulic tool is performing pressure relief work, the elastic element pushes the hydraulic push rod to move within the liquid chamber, so that the liquid in the liquid chamber can be released through the pressure relief port, and the controller outputs a conduction signal to the pressure relief valve to control the pressure relief valve to open the pressure relief port for active pressure relief, so that the liquid in the liquid chamber can be completely released, thereby improving the pressure relief speed of the hydraulic tool. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a hydraulic tool provided in an embodiment of this application.
[0016] Figure 2 This is another structural schematic diagram of the hydraulic tool provided in the embodiments of this application.
[0017] Figure 3 This is another structural schematic diagram of the hydraulic tool provided in the embodiments of this application.
[0018] Figure 4 This is a schematic diagram of the working current waveform of the hydraulic tool provided in the embodiments of this application.
[0019] Figure 5 This is another structural schematic diagram of the hydraulic tool provided in the embodiments of this application.
[0020] Figure 6 This is a schematic flowchart of a hydraulic tool control method provided in an embodiment of this application.
[0021] Figure 7 This is another schematic flowchart of the hydraulic tool control method provided in the embodiments of this application. Detailed Implementation
[0022] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments.
[0023] In the embodiments of this application, terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or order. For example, "first application" and "second application" are used to distinguish different applications, not to describe a specific order of applications. Features specified as "first" or "second" may explicitly or implicitly include one or more of those features.
[0024] Please see Figure 1 One embodiment of this application provides a hydraulic tool, including: a controller 10, a hydraulic push rod 20, an elastic element 30, a hydraulic chamber 40, and a pressure relief valve 50. The controller 10 is electrically connected to the pressure relief valve 50, which is located at the pressure relief port 60 of the hydraulic chamber 40. The elastic element 30 is sleeved on the rod body of the hydraulic push rod 20, which is disposed within the hydraulic chamber 40.
[0025] Specifically, one end of the elastic element 30 abuts against the inner wall of the liquid chamber 40, and the other end of the elastic element 30 abuts against the push head of the hydraulic push rod 20. When the hydraulic tool depressurizes, the elastic element 30 pushes the hydraulic push rod 20 to move within the liquid chamber 40, thereby pushing the liquid in the liquid chamber 40 through the pressure relief port 60 to release pressure. Optionally, please refer to... Figure 1The elastic element 30 is a spring, but in practical applications it is not limited to this; it can be chosen depending on the specific application environment, and all are within the scope of protection of this application. Figure 1 For example, when the hydraulic push rod 20 moves to the right along the liquid chamber 40, the liquid in the liquid chamber 40 can be depressurized through the pressure relief port 60.
[0026] In practical applications, when hydraulic tools are depressurized, the controller 10 outputs a conduction signal to the pressure relief valve 50 to control the pressure relief valve 50 to open the pressure relief port 60. For example... Figure 1 As shown, 70 is the pressure relief chamber 70 of the hydraulic tool. In practical applications, the liquid chamber 40 is connected to the pressure relief chamber 70 through the pressure relief port 60, so that the liquid in the liquid chamber 40 can be released into the pressure relief chamber 70 through the pressure relief port 60. Practical applications are not limited to this, and all are within the scope of protection of this application.
[0027] The working process of the above-mentioned hydraulic tool is as follows: When the hydraulic tool is performing pressure relief work, the controller 10 outputs a conduction signal to the pressure relief valve 50, controls the pressure relief valve 50 to open the pressure relief port 60, and the elastic element 30 pushes the hydraulic push rod 20 to move in the liquid chamber 40, so as to push the liquid in the liquid chamber 40 to be released through the pressure relief port 60.
[0028] The hydraulic tool provided in this embodiment includes: a controller 10, a hydraulic push rod 20, an elastic element 30, a liquid chamber 40, and a pressure relief valve 50. The controller 10 is electrically connected to the pressure relief valve 50, which is located at the pressure relief port 60 of the liquid chamber 40. The elastic element 30 is sleeved on the rod of the hydraulic push rod 20, which is located within the liquid chamber 40. When the hydraulic tool is depressurizing, the elastic element 30 pushes the hydraulic push rod 20 to move along the liquid chamber 40, allowing the liquid in the liquid chamber 40 to be released through the pressure relief port 60. The controller 10 outputs a conduction signal to the pressure relief valve 50 to control the valve to open the pressure relief port 60 for active pressure relief, ensuring complete release of the liquid in the liquid chamber 40 and improving the depressurization speed of the hydraulic tool.
[0029] Based on the above embodiments, please refer to Figure 1 Another embodiment of this application provides a hydraulic tool with a pressure relief valve 50, which includes a pressure relief valve 50 core, a lever 52, and a solenoid valve 51. One end of the lever 52 is connected to the pressure relief valve 50 core, and the other end is connected to the solenoid valve 51, which is electrically connected to the controller 10. The solenoid valve 51 is configured such that when the controller 10 outputs a conduction signal, it displaces the pressure relief valve 50 core via the lever 52, thereby opening the pressure relief port 60.
[0030] The working process of the above-mentioned hydraulic tool is as follows: When the hydraulic tool is performing pressure relief work, the controller 10 outputs a conduction signal to the solenoid valve 51 to control the solenoid valve 51 to move, and then drives the pressure relief valve 50 core to open the pressure relief port 60 through the lever 52, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60.
[0031] The pressure relief valve 50 in the hydraulic tool provided in this embodiment includes a pressure relief valve 50 core, a lever 52, and a solenoid valve 51. When the solenoid valve 51 receives the conduction signal output by the controller 10, the solenoid valve 51 drives the pressure relief valve 50 core to open the pressure relief port 60 through the lever 52, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60. This prevents the pressure relief port 60 from shrinking as the elastic force of the elastic element 30 decreases, thereby increasing the pressure relief speed of the hydraulic tool and allowing the liquid in the liquid chamber 40 to be completely released.
[0032] Based on the previous embodiment, please refer to Figure 2 Another embodiment of this application provides a hydraulic tool that further includes a motor drive module 80 and a motor 90. The motor 90 is electrically connected to the motor drive module 80, and the motor drive module 80 is electrically connected to the controller 10.
[0033] In practical applications, when the operating current value of the motor drive module 80 changes abruptly and is less than the first preset current, the controller 10 outputs a conduction signal to the solenoid valve 51. (Please refer to...) Figure 3 In practical applications, the controller 10 can monitor the operating current value in the motor drive module 80 through the current monitoring module 91. Specifically, the waveform of the operating current value for the hydraulic tool to complete one pressure relief operation can be as follows: Figure 4 As shown, t is the pressure relief working time of the hydraulic tool, A is the working current value of motor 90, and the abrupt change in the working current value is the moment when the working current value of motor drive module 80 starts to decrease after reaching its maximum value d, i.e. Figure 4 The time when the operating current value shown is greater than the third current value a, but less than the first preset current b.
[0034] The working process of the above hydraulic tool is as follows: after the working current value of the motor drive module 80 changes abruptly, and the controller 10 detects that the working current value of the motor drive module 80 is less than the first preset current b, the controller 10 outputs a conduction signal to the solenoid valve 51 to control the solenoid valve 51 to open the pressure relief port 60, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60.
[0035] In practical applications, when the hydraulic tool is performing crimping work, the controller 10 outputs a drive signal to the motor drive module 80, so that the motor 90 pushes the hydraulic push rod 20 to perform crimping. Figure 1For example, when the hydraulic push rod 20 moves to the left along the liquid chamber 40, the motor 90 pushes the hydraulic push rod 20 to perform pressing. Optionally, after a sudden change in the operating current value of the motor drive module 80, and when the controller 10 detects that the operating current value of the motor drive module 80 is less than the first preset current b, the controller 10 outputs a conduction signal to the solenoid valve 51 and a stop signal to the motor drive module 80, so as to avoid the motor drive module 80 working against the elastic force of the elastic element 30, which would affect the pressure relief speed of the hydraulic tool.
[0036] Optionally, after a sudden change in the operating current value of the motor drive module 80, and when the controller 10 detects that the operating current value of the motor drive module 80 is less than the second preset current c, the controller 10 outputs a shutdown signal to the motor drive module 80 to prevent the motor drive module 80 from resisting the elastic force of the elastic element 30, thereby affecting the pressure relief speed of the hydraulic tool. After a preset time, the controller 10 outputs a shut-off signal to the solenoid valve 51 to control the solenoid valve 51 to shut off after the pressure relief is completed, thus avoiding the waste of electrical energy.
[0037] Specifically, the second preset current c is less than the first preset current b, and the values of the preset duration, the first preset current b, and the second preset current c are not specifically limited here, but can be determined according to the actual application environment, and are all within the protection scope of this application.
[0038] When the operating current value of the motor drive module 80 of the hydraulic tool provided in this embodiment suddenly changes, and the controller 10 detects that the operating current value of the motor drive module 80 is less than the first preset current b, the controller 10 outputs a conduction signal to the solenoid valve 51 to control the solenoid valve 51 to open the pressure relief port 60, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60, and the pressure relief port 60 will not decrease as the elastic force of the elastic element 30 decreases, thereby improving the pressure relief speed of the hydraulic tool and ensuring that the liquid in the liquid chamber 40 can be completely released.
[0039] Based on the above embodiments, please refer to Figure 5 Another embodiment of this application provides a hydraulic tool that further includes a displacement monitoring module 54. The displacement monitoring module 54 is electrically connected to the controller 10. When the pressure relief valve 50 core is displaced, the displacement monitoring module 54 outputs a displacement signal of the pressure relief valve 50 core to the controller 10.
[0040] Optionally, in practical applications, a Hall sensor can be used as the displacement monitoring module 54, and the Hall sensor can be placed in... Figure 5 The elliptical position in the diagram allows the Hall sensor to output a displacement signal to the controller 10 when the pressure relief valve 50 core is displaced. In practical applications, this is not the only option; it depends on the specific application environment, and all are within the scope of this application.
[0041] The working process of the above-mentioned hydraulic tool is as follows: When the hydraulic tool is performing pressure relief, the hydraulic push rod 20 pushes the liquid in the liquid chamber 40 to generate pressure, so that the pressure relief valve 50 core is displaced and opens the pressure relief port 60. After the displacement monitoring module 54 detects the displacement of the pressure relief valve 50 core, it outputs a displacement signal to the controller 10, so that the controller 10 outputs a conduction signal to the solenoid valve 51, which in turn drives the pressure relief valve 50 core to move through the lever 52, opening the pressure relief port 60, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60.
[0042] For practical applications, please refer to Figure 4 After the pressure relief is completed, for example, when the pressure relief time is greater than t2 or the operating current value of the motor drive module 80 is less than the second preset current c, the controller 10 outputs a shutdown signal to the solenoid valve 51, so as to drive the pressure relief valve 50 core to close the pressure relief port 60 through the lever 52, thereby ending the pressure relief.
[0043] The hydraulic tool provided in this embodiment uses a displacement monitoring module 54 to monitor the position of the pressure relief valve 50 core. When the pressure relief valve 50 core is displaced, a displacement signal is output to the controller 10, so that the controller 10 can control the solenoid valve 51 to drive the pressure relief valve 50 core to displace through the lever 52, open the pressure relief port 60, and allow the liquid in the liquid chamber 40 to be completely released. This improves the pressure relief speed of the hydraulic tool and ensures that the liquid in the liquid chamber 40 is completely released.
[0044] Based on the above embodiments, another embodiment of this application provides a hydraulic tool control method, applicable to the hydraulic tools described in any of the above embodiments. Please refer to [link to relevant documentation]. Figure 6 The hydraulic tool control method includes:
[0045] S60, the controller outputs a conduction signal to the pressure relief valve to control the pressure relief valve to open the pressure relief port.
[0046] See Figure 1 When the hydraulic tool is performing pressure relief work, the controller 10 outputs a conduction signal to the pressure relief valve 50 to control the pressure relief valve 50 to open the pressure relief port 60.
[0047] For details, please refer to Figure 2 When the hydraulic tool is performing pressure relief work, the controller 10 outputs a conduction signal to the solenoid valve 51 to control the solenoid valve 51 to drive the pressure relief valve 50 core to move through the lever 52, opening the pressure relief port 60, so that when the hydraulic push rod 20 moves in the liquid chamber 40, the liquid in the liquid chamber 40 can be released through the pressure relief port 60.
[0048] Optional, please refer to Figure 5The hydraulic tool also includes a displacement monitoring module 54, which is electrically connected to the controller 10. In practical applications, the hydraulic push rod 20 pushes the liquid in the fluid chamber 40 to generate pressure, causing the pressure relief valve 50 core to displace and open the pressure relief port 60. After detecting the displacement of the pressure relief valve 50 core, the displacement monitoring module 54 outputs a displacement signal to the controller 10, causing the controller 10 to output a conduction signal to the solenoid valve 51. This, in turn, drives the pressure relief valve 50 core to displace through the solenoid valve 51 and the lever 52, fully opening the pressure relief port 60. This allows the liquid in the fluid chamber 40 to be released through the pressure relief port 60, improving the pressure relief speed of the hydraulic tool.
[0049] The hydraulic tool control method provided in this embodiment outputs a conduction signal to the pressure relief valve 50 through the controller 10 when the hydraulic tool is performing pressure relief work, so as to control the pressure relief valve 50 to open the pressure relief port 60, thereby enabling the hydraulic push rod 20 to push the liquid in the liquid chamber 40 to be released through the pressure relief port 60. This avoids the size of the pressure relief port 60 from decreasing as the elastic force of the elastic element 30 decreases during the pressure relief process, which would affect the pressure relief speed of the hydraulic tool. This improves the pressure relief speed of the hydraulic tool and allows the liquid in the liquid chamber 40 to be completely released.
[0050] Based on the above embodiments, another embodiment of this application provides a hydraulic tool control method that can be applied to, for example... Figure 2 Among the hydraulic tools shown, please refer to Figure 7 Step S60 in the hydraulic tool control method provided in another embodiment of this application includes:
[0051] S71, the controller monitors the operating current value of the motor drive module.
[0052] In practical applications, such as Figure 3 As shown, the controller 10 can monitor the operating current value in the motor drive module 80 through the current monitoring module 91.
[0053] S72. The controller determines whether the operating current value is less than the first preset current.
[0054] After a sudden change in the operating current value, the controller 10 determines whether the operating current value of the motor drive module 80 is less than the first preset current b. If the operating current value of the motor drive module 80 is less than the first preset current b, the controller 10 executes step S73; and if the operating current value of the motor drive module 80 is not less than the first preset current b, the controller returns to execute step S72.
[0055] S73, the controller outputs a conduction signal to the pressure relief valve.
[0056] When the operating current of the motor drive module 80 is less than the first preset current b, the hydraulic tool is depressurized. The controller 10 outputs a conduction signal to the pressure relief valve 50 to control the solenoid valve 51 to open the pressure relief port 60, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60.
[0057] Specifically, the value of the first preset current b is not specifically limited here, but can be determined according to the actual application environment, and all are within the protection scope of this application.
[0058] The hydraulic tool control method provided in this embodiment, after a sudden change in the operating current value of the motor drive module 80, and when the controller 10 detects that the operating current value of the motor drive module 80 is less than the first preset current b, outputs a conduction signal to the solenoid valve 51 to control the solenoid valve 51 to open the pressure relief port 60, so that the liquid in the liquid chamber 40 can be released through the pressure relief port 60, and the pressure relief port 60 will not decrease as the elastic force of the elastic element 30 decreases, thereby improving the pressure relief speed of the hydraulic tool and ensuring that the liquid in the liquid chamber 40 can be completely released.
[0059] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, any appropriate changes and variations made to the above embodiments that fall within the essential spirit and scope of this application should be considered within the scope of protection claimed by this application.
Claims
1. A hydraulic tool, characterized in that, include: Controller, hydraulic push rod, elastic element, fluid chamber, and pressure relief valve; among which, The controller is electrically connected to the pressure relief valve, the pressure relief valve is located at the pressure relief port of the liquid chamber, the elastic element is sleeved on the rod body of the hydraulic push rod, and the hydraulic push rod is located inside the liquid chamber; When the hydraulic tool is performing pressure relief work, the elastic element is used to push the hydraulic push rod to move within the liquid chamber, so as to push the liquid in the liquid chamber through the pressure relief port to relieve pressure; The controller is configured to: When the hydraulic tool is performing pressure relief work, the pressure relief valve is controlled to open the pressure relief port.
2. The hydraulic tool according to claim 1, characterized in that, The pressure relief valve includes: a pressure relief valve core, a lever, and a solenoid valve; One end of the lever is connected to the pressure relief valve core, and the other end of the lever is connected to the solenoid valve, which is electrically connected to the controller; The controller is configured to output a conduction signal to the pressure relief valve when the hydraulic tool is performing a pressure relief operation; The solenoid valve is configured to respond to the conduction signal to displace the pressure relief valve core via the lever and open the pressure relief port.
3. The hydraulic tool according to claim 2, characterized in that, The hydraulic tool also includes: a motor drive module and a motor; The motor is electrically connected to the motor drive module, and the motor drive module is electrically connected to the controller; After a sudden change in the operating current value of the motor drive module, the controller is configured to output the conduction signal to the solenoid valve when the operating current value is less than a first preset current.
4. The hydraulic tool according to claim 3, characterized in that, After a sudden change in the operating current value of the motor drive module, the controller is configured to output the turn-on signal to the solenoid valve and the stop signal to the motor drive module when the operating current value is less than a first preset current.
5. The hydraulic tool according to claim 4, characterized in that, After a sudden change in the operating current value of the motor drive module, the controller is configured to output a shutdown signal to the motor drive module when the operating current value is less than a second preset current; and the controller is configured to output a shutdown signal to the solenoid valve after a preset duration of outputting the shutdown signal. The second preset current is less than the first preset current.
6. The hydraulic tool according to claim 3, characterized in that, The hydraulic tool also includes: a displacement monitoring module; The displacement monitoring module is electrically connected to the controller; When the pressure relief valve core is displaced, the displacement monitoring module outputs a displacement signal to the controller.
7. The hydraulic tool according to claim 6, characterized in that, The controller is configured to output the conduction signal to the solenoid valve in response to the displacement signal.
8. A hydraulic tool control method, characterized in that, The hydraulic tool includes a controller, a hydraulic push rod, an elastic element, a hydraulic chamber, and a pressure relief valve. The controller is electrically connected to the pressure relief valve, which is located at the pressure relief port of the hydraulic chamber. The elastic element is sleeved on the rod body of the hydraulic push rod, which is disposed within the hydraulic chamber. The hydraulic tool control method includes: When the hydraulic tool is performing pressure relief, the controller outputs a conduction signal to the pressure relief valve to control the pressure relief valve to open the pressure relief port.
9. The hydraulic tool control method according to claim 8, characterized in that, The hydraulic tool further includes a motor drive module and a motor, the motor being electrically connected to the motor drive module, and the motor drive module being electrically connected to the controller. The controller controls the pressure relief valve to open the pressure relief port, including: The controller monitors the operating current value of the motor drive module; After the operating current value changes abruptly, the controller determines whether the operating current value is less than a first preset current. If the operating current value is less than the first preset current, the controller outputs a conduction signal to the pressure relief valve.
10. The hydraulic tool control method according to claim 8, characterized in that, The hydraulic tool further includes a displacement monitoring module, which is electrically connected to the controller. When the hydraulic tool is depressurizing, the hydraulic tool control method further includes: When the displacement monitoring module outputs a displacement signal, the controller controls the pressure relief valve to open the pressure relief port.