Rams and piston control device and ram control system

Abstract

The present application relates to the technical field of hydraulic pressure, and discloses an oil cylinder piston control device and an oil cylinder control system, wherein the oil cylinder piston control device collects and outputs the displacement parameter corresponding to the oil cylinder piston by using a sampling module, so as to determine whether the current oil cylinder piston has a position change compared with the initial position based on the displacement parameter; the sampling module is connected with a control module, so that the control module outputs a control signal to the driving module connected therewith according to the displacement parameter; the driving module is connected with the oil cylinder through an oil pipe; after receiving the control signal, the driving module drives the hydraulic oil into the oil cylinder based on the control signal, so as to make the oil cylinder piston move towards the initial position, thereby realizing compensation for the volume change of the hydraulic oil in the oil chamber of the oil cylinder caused by internal leakage, ensuring the stability of the position of the oil cylinder piston, and improving the reliability and stability of the corresponding equipment in use.

Description

Technical Field

[0001] This invention relates to the field of hydraulic technology, specifically to a cylinder piston control device and a cylinder control system. Background Technology

[0002] When hydraulic cylinders maintain a load for extended periods, undesirable changes in the piston position can occur due to internal leakage from the cylinder valve or the cylinder itself, as well as temperature variations. Precise control of the piston position is crucial. Current technologies typically focus on accurately controlling the cylinder's extension and retraction speed and length, or integrating displacement sensors into the cylinder itself. However, neither of these methods effectively addresses the issue of automatic reset after minute changes in piston position. Summary of the Invention

[0003] To address the aforementioned shortcomings in the prior art, the purpose of this invention is to provide a hydraulic cylinder piston control device and a hydraulic cylinder control system.

[0004] To achieve the above objectives, a first aspect of the present invention provides a hydraulic cylinder piston control device, comprising:

[0005] The sampling module is used to collect and output the displacement parameters corresponding to the cylinder piston;

[0006] The control module, connected to the sampling module, is configured to output control signals based on displacement parameters;

[0007] The drive module is connected to the control module and is also used to connect to the hydraulic cylinder via an oil pipe.

[0008] The drive module is configured to drive hydraulic oil into the cylinder based on a control signal, so that the cylinder piston moves toward the initial position.

[0009] In this embodiment of the invention, the driving module includes:

[0010] Switching circuit;

[0011] Drive unit; and

[0012] Power supply unit;

[0013] One end of the switching circuit is connected to the control module, and the other end of the switching circuit is connected to the drive unit and the power supply unit respectively. The drive unit is also used to connect to the oil cylinder through the oil pipe.

[0014] In this embodiment of the invention, the switching circuit includes:

[0015] The first switching unit, one end of which is connected to the control module;

[0016] The second switching unit has one end of the first switching unit connected to one end of the second switching unit, and the other end of the second switching unit is connected to the driving unit and the power supply unit respectively.

[0017] The control module is also configured to:

[0018] When the displacement parameter is detected to be less than or equal to the falling offset threshold, a first control signal is output to control the first switching unit to turn on, thereby turning on the second switching unit and connecting the drive unit and the power supply unit.

[0019] In this embodiment of the invention, the first switching unit includes:

[0020] First switching device; and

[0021] Second switching device;

[0022] The first end of the first switching device is connected to the first end of the second switching device, the second end of the first switching device and the second end of the second switching device are respectively connected to the control module, and the third end of the second switching device is connected to the second switching unit.

[0023] The control module is also configured to:

[0024] When the displacement parameter is detected to be less than or equal to the falling offset threshold, a first control signal is output to turn on the first and second switching devices.

[0025] When the displacement parameter is detected to be greater than or equal to the rising offset threshold, a second control signal is output to turn off the second switching device, wherein the rising offset threshold is greater than the falling offset threshold.

[0026] In this embodiment of the invention, the control module includes:

[0027] The first control unit is connected to the second terminal of the first switching device through the first control unit. The first control unit is used to close when the displacement parameter is detected to be less than or equal to a preset falling offset threshold, so as to output a first control signal.

[0028] The second control unit is connected to the second terminal of the second switching device through the second control unit. The second control unit is used to close when the displacement parameter is detected to be greater than or equal to a preset upward offset threshold, so as to output a second control signal.

[0029] In this embodiment of the invention, the driving unit includes:

[0030] The motor is connected to the switching circuit;

[0031] The auxiliary pump is mechanically connected to the motor and is connected to the hydraulic cylinder via an oil pipe.

[0032] In this embodiment of the invention, it further includes:

[0033] The main control switch module is connected to both the drive module and the control module.

[0034] In this embodiment of the invention, the main control switch module includes:

[0035] Main control unit; and

[0036] Third switching unit;

[0037] The first end of the third switch unit is connected to the power supply unit of the drive module, the second end of the third switch unit is connected to the switch circuits of the control module and the drive module respectively, and the third end of the third switch unit is connected to the main control unit.

[0038] The main control unit is configured to control the activation of the third switching unit when the hydraulic cylinder stops working.

[0039] In this embodiment of the invention, the control module includes a meter counter.

[0040] A second aspect of the present invention provides a hydraulic cylinder control system, comprising:

[0041] Hydraulic cylinder main power module;

[0042] The hydraulic cylinder piston control device according to the above embodiments; and

[0043] One-way valve;

[0044] The hydraulic cylinder's main power module is connected to the hydraulic cylinder piston control device;

[0045] The drive module of the hydraulic cylinder piston control device is connected to the hydraulic cylinder of the hydraulic cylinder power module via an oil pipe. A check valve is installed on the oil pipe, and the check valve is used to allow hydraulic oil to flow from the drive module to the hydraulic cylinder only.

[0046] In this embodiment of the invention, the hydraulic cylinder active power module includes an active power unit, a main pump, a hydraulic cylinder holding valve, a solenoid directional valve, and a hydraulic cylinder. One end of the active power unit is connected to the drive module of the hydraulic cylinder piston control device, and the other end of the active power unit is mechanically connected to one end of the main pump. The other end of the main pump, the hydraulic cylinder holding valve, the solenoid directional valve, and the hydraulic cylinder are connected in sequence through oil pipes. The sampling module of the control system is installed on the hydraulic cylinder.

[0047] The above technical solution utilizes a sampling module to collect and output displacement parameters corresponding to the cylinder piston. Based on these displacement parameters, it determines whether the current cylinder piston has changed position relative to its initial position. A control module is connected to the sampling module, enabling the control module to output a control signal to the connected drive module based on the displacement parameters. The drive module is connected to the cylinder via an oil pipe. Upon receiving the control signal, it drives hydraulic oil into the cylinder, causing the cylinder piston to move towards its initial position. This compensates for the volume change of the hydraulic oil in the cylinder chamber caused by internal leakage, ensuring the stability of the cylinder piston position and improving the reliability and stability of the corresponding equipment during use.

[0048] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0049] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0050] Figure 1 This is a schematic diagram of a hydraulic cylinder piston control device according to a first embodiment of the present invention;

[0051] Figure 2 This is a schematic diagram of the sampling module structure according to an embodiment of the present invention;

[0052] Figure 3 This is a schematic diagram of the structure of a hydraulic cylinder control system according to an embodiment of the present invention;

[0053] Figure 4 This is a schematic diagram of the application process of an embodiment of the present invention.

[0054] Explanation of reference numerals in the attached figures

[0055] 100. Sampling module; 200. Control module; 300. Drive module; 101. Support; 102. Bracket; 103. Spring; 104. Roller; 105. Encoder; 201. First control unit; 202. Second control unit; 310. Switching circuit; 311. First switching device; 312. Second switching device; 313. Second switching unit; 320. Drive unit; 321. Auxiliary pump; 322. Motor; 3 30. Power supply unit; 340. First switch unit; 361. First contact; 362. Second contact; 363. Third contact; 364. Fourth contact; 365. Fifth contact; 410. Third switch unit; 420. Main control unit; 510. Main power; 520. Main pump; 530. Overflow valve; 540. Filter; 550. Solenoid directional valve; 560. Cylinder holding valve; 600. Check valve; 700. Cylinder. Detailed Implementation

[0056] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0057] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0059] Figure 1 The diagram schematically illustrates a hydraulic cylinder piston control device according to a first embodiment of the present invention. For example... Figure 1 As shown, in one embodiment of the present invention, a hydraulic cylinder piston control device is provided, the hydraulic cylinder piston control device comprising:

[0060] The sampling module 100 is used to collect and output the displacement parameters corresponding to the cylinder piston.

[0061] The control module 200, connected to the sampling module 100, is configured to output a control signal based on the displacement parameters.

[0062] The drive module 300 is connected to the control module 200, and the drive module 300 is also used to connect to the oil cylinder 700 via an oil pipe.

[0063] The drive module 300 is configured to drive hydraulic oil into the cylinder 700 based on a control signal, so that the cylinder piston moves toward the initial position.

[0064] In this embodiment, it should be noted that the hydraulic cylinder achieves its extension and retraction movement through the hydraulic oil within it during normal operation. When the cylinder is stationary, the hydraulic oil within the cylinder chamber is sealed off by the balance valve in the cylinder holding valve 560, thus keeping the cylinder piston stationary. However, in practical applications, the balance valve, like other hydraulic valves, inevitably experiences internal leakage. This causes the cylinder piston position to change, preventing it from remaining in a fixed position. To reduce the impact of the balance valve's internal leakage on the cylinder piston, this embodiment uses a cylinder piston control device to control the position of the cylinder piston.

[0065] Specifically, the hydraulic cylinder piston control device includes a sampling module 100, which is used to collect and output displacement parameters corresponding to the hydraulic cylinder piston. The displacement parameters include the displacement of the current position of the hydraulic cylinder piston relative to its initial fixed position before internal leakage occurs. The hydraulic cylinder piston control device also includes a control module 200, which is connected to the sampling module 100. The control module 200 acquires the displacement parameters output by the sampling module 100 and outputs a control signal based on the displacement parameters. The control signal includes a signal that can directly or indirectly drive the position change of the hydraulic cylinder piston to reset it to the fixed position corresponding to the initial moment. The hydraulic cylinder piston control device also includes a drive module 300, which is connected to the control module 200 and connected to the hydraulic cylinder through an oil pipe. After acquiring the control signal output by the control module 200, the drive module 300 drives hydraulic oil through the oil pipe into the hydraulic cylinder based on the control signal, so that the hydraulic cylinder piston tends to move towards the initial position. The initial position includes the fixed position corresponding to the hydraulic cylinder piston when the hydraulic cylinder is stationary and internal leakage has not yet occurred.

[0066] refer to Figure 2 In one embodiment, the sampling module 100 includes an encoding device, which includes a support 101, a bracket 102, a spring 103, a roller 104, and an encoder 105. One end of the support 101 is connected to one end of the bracket 102, and the other end of the support 101 is connected to the other end of the bracket 102 via the spring 103. The other end of the bracket 102 is also connected to the roller 104, which is placed on the cylinder piston extension component. The support 101 is fixed to the outlet of the cylinder piston extension component. The encoder 105 is connected to the roller 104 and is used to detect the displacement of the cylinder piston based on the movement of the roller.

[0067] By employing the aforementioned hydraulic cylinder piston control device, the sampling module 100 collects and outputs the displacement parameters corresponding to the hydraulic cylinder piston. Based on these displacement parameters, it is determined whether the current hydraulic cylinder piston has undergone a positional change relative to its initial position. The control module 200 is connected to the sampling module 100, so that the control module 200 outputs a control signal to the drive module 300 connected to it based on the displacement parameters. The drive module 300 is connected to the hydraulic cylinder through an oil pipe. After receiving the control signal, it drives hydraulic oil into the hydraulic cylinder based on the control signal, so that the hydraulic cylinder piston tends to move towards its initial position. This compensates for the volume change of the hydraulic oil in the hydraulic cylinder chamber caused by internal leakage, ensures the stability of the hydraulic cylinder piston position, and improves the reliability and stability of the corresponding equipment during use.

[0068] refer to Figure 3 In one embodiment, the driving module 300 includes:

[0069] Switching circuit 310;

[0070] Drive unit 320; and

[0071] Power supply unit 330;

[0072] One end of the switch circuit 310 is connected to the control module 200, and the other end of the switch circuit 310 is connected to the drive unit 320 and the power supply unit 330 respectively. The drive unit 320 is also used to connect to the oil cylinder 700 through the oil pipe.

[0073] In this embodiment, it should be noted that the drive module 300 is used to drive hydraulic oil into the cylinder 700 based on a control signal. Specifically, the drive module 300 includes a switching circuit 310, a drive unit 320, and a power supply unit 330. The drive unit 320 is connected to the power supply unit 330 through the switching circuit 310 and to the cylinder 700 through an oil pipe. The power supply unit 330 includes a power source to provide power to the drive unit 320. When the switching circuit 310 is turned on, connecting the power supply unit 330 and the drive unit 320, the drive unit 320 obtains the power source, thereby driving the hydraulic oil to be input into the cylinder 700 through the oil pipe.

[0074] In one embodiment, the switching circuit 310 includes:

[0075] The first switch unit 340 has one end connected to the control module 200.

[0076] The second switch unit 313 is connected to one end of the first switch unit 340, and the other end of the second switch unit 313 is connected to the drive unit 320 and the power supply unit 330 respectively.

[0077] Control module 200 is also configured to:

[0078] When the displacement parameter is detected to be less than or equal to the falling offset threshold, a first control signal is output to control the first switching unit 340 to turn on, thereby turning on the second switching unit 313 and connecting the driving unit 320 and the power supply unit 330.

[0079] In this embodiment, it should be noted that the switch circuit 310 connects the power supply unit 330 and the drive unit 320, and the control module 200 is connected to the switch circuit 310 to control the on and off states of the switch circuit 310 to control the connection and disconnection between the power supply unit 330 and the drive unit 320. Specifically, the switch circuit 310 includes a first switch unit 340 and a second switch unit 313. The control module 200 is connected to the second switch unit 313 through the first switch unit 340. The second switch unit 313 is also connected to the power supply unit 330. When the first switch unit 340 is on, the second switch unit 313 is energized and conducts, thereby achieving the connection between the drive unit 320 and the power supply unit 330. The descent offset threshold includes a displacement descent threshold, which is used as a reference for the displacement of the cylinder piston retraction after internal leakage. It is a preset value and can be adaptively adjusted according to actual needs and equipment characteristics. When the displacement parameter corresponding to the piston of the hydraulic cylinder is less than or equal to the preset descent offset threshold, the control module 200 will output a first control signal to control the first switch unit 340 to conduct, thereby energizing the second switch unit 313 to conduct, so as to realize the conduction between the drive unit 320 and the power supply unit 330.

[0080] In one embodiment, the first switching unit 340 includes:

[0081] First switching device 311; and

[0082] Second switching device 312;

[0083] The first end of the first switching device 311 is connected to the first end of the second switching device 312, the second end of the first switching device 311 and the second end of the second switching device 312 are respectively connected to the control module 200, and the third end of the second switching device 312 is connected to the second switching unit 313.

[0084] Control module 200 is also configured to:

[0085] When the displacement parameter is detected to be less than or equal to the falling offset threshold, a first control signal is output to turn on the first switching device 311 and the second switching device 312.

[0086] When the displacement parameter is detected to be greater than or equal to the rising offset threshold, a second control signal is output to turn off the second switching device 312, wherein the rising offset threshold is greater than the falling offset threshold.

[0087] In this embodiment, it should be noted that the first switching unit 340 can control the on and off states of the second switching unit 313. When the first switching unit 340 is on, the second switching unit 313 is energized and on; when the first switching unit 340 is off, the second switching unit 313 is de-energized and off. Specifically, the first switching unit 340 includes a first switching device 311 and a second switching device 312. The second ends of the first switching device 311 and the second switching device 312 are respectively connected to the control module 200. The first end of the first switching device 311 is connected to the first end of the second switching device 312, and the third end of the second switching device 312 is connected to the second switching unit 313. When both the first switching device 311 and the second switching device 312 are in an on state, the second switching unit 313 is energized and on. The rising offset threshold includes a displacement rising threshold, used as a reference for the displacement amount during the piston reset process of the cylinder 700 after the drive unit 320 replenishes oil to the cylinder. It is a preset value and can be adaptively adjusted according to actual needs and equipment characteristics. The rising offset threshold is greater than the falling offset threshold; for example, when the falling offset threshold is -2mm, the rising offset threshold is +2mm. The range between the falling and rising offset thresholds can also be -3mm to +5mm, -5mm to 0mm, etc. When the displacement parameter corresponding to the cylinder piston is less than or equal to the preset falling offset threshold, the control module 200 will output a first control signal to connect the first switching device 311 and the second switching device 312, i.e., control the first switching unit 340 to conduct. When the displacement parameter corresponding to the cylinder piston is greater than or equal to the preset rising offset threshold, a second control signal will be output to turn off the second switching device 312, disconnecting the first switching device 311 and the second switching device 312, i.e., control the first switching unit 340 to turn off.

[0088] In one embodiment, the control module 200 includes:

[0089] The first control unit 201 and the power supply unit 330 are connected to the second terminal of the first switching device 311 through the first control unit 201. The first control unit 201 is used to close when the displacement parameter is detected to be less than or equal to a preset falling offset threshold, so as to output a first control signal.

[0090] The second control unit 202 and the power supply unit 330 are connected to the second terminal of the second switching device 312 through the second control unit 202. The second control unit 202 is used to close when the displacement parameter is detected to be greater than or equal to a preset upward offset threshold, so as to output a second control signal.

[0091] In this embodiment, it should be noted that the control module 200 controls the on and off of the first switching unit 340 by outputting control signals. The control module 200 includes a first control unit 201 and a second control unit 202, and the first switching unit 340 includes a first switching device 311 and a second switching device 312. The first control unit 201 can output a first control signal to connect the first switching device 311 and the second switching device 312, that is, to control the first switching unit 340 to conduct. Specifically, the power supply unit 330 is connected to the second terminal of the first switching device 311 through the first control unit 201. The first control unit 201 is used to close when it detects that the displacement parameter is less than or equal to a preset downward offset threshold, so as to output the first control signal and thus turn on the first switching unit 340. The second control unit 202 can output a second control signal to turn off the second switching device 312, that is, to control the first switching unit 340 to disconnect. Specifically, the power supply unit 330 is connected to the second terminal of the second switching device 312 through the second control unit 202. The second control unit 202 is used to close when it detects that the displacement parameter is greater than or equal to a preset upward offset threshold, so as to output the second control signal and turn off the second switching device 312, thereby turning off the first switching unit 340.

[0092] refer to Figure 3 In one embodiment, the control unit includes a relay, a first control unit 201 includes a first relay, and a second control unit 202 includes a second relay; the switching device includes an intermediate relay, a first switching device 311 includes a first intermediate relay, and a second switching device 312 includes a second intermediate relay; the second switching unit 313 includes a first contactor. The first and second relays are in an open state by default; the first intermediate relay includes two normally open contacts: a first contact 361 and a second contact 362; the second intermediate relay includes a normally open contact: a third contact 363, and a normally closed contact: a fourth contact 364; the first relay closes when it detects a displacement parameter less than or equal to a preset downward offset threshold, energizing the first intermediate relay, closing the first contact 361 and the second contact 362, and conducting both the first and second intermediate relays; the second relay closes when it detects a displacement parameter greater than or equal to a preset upward offset threshold, energizing the second intermediate relay, closing the third contact 363, and opening the fourth contact 364. Among them, the rising offset threshold is greater than the falling offset threshold. When the displacement parameter is between the rising offset threshold and the falling offset threshold, the first intermediate relay can be self-energized. At this time, the first intermediate relay and the second intermediate relay are connected, that is, the first switching unit 340 is turned on, so as to realize the second switching unit 313 is energized and turned on, thereby maintaining the connection between the drive unit 320 and the power supply unit 330. The drive unit 320 continuously drives the hydraulic oil into the oil cylinder 700 through the oil pipe.

[0093] In one embodiment, the driving unit 320 includes:

[0094] Motor 322 is connected to switch circuit 310;

[0095] Auxiliary pump 321 is mechanically connected to motor 322, and auxiliary pump 321 is connected to oil cylinder 700 through oil pipe.

[0096] In this embodiment, it should be noted that when the hydraulic system is working normally, the main pump 520 driven by the main force 510 provides hydraulic oil for the extension and retraction of the cylinder 700. The main pump 520 outputs hydraulic oil into the oil chamber of the cylinder 700 until the oil in the cylinder 700 meets the working requirements, and the oil in the cylinder 700 chamber is sealed, and the cylinder piston remains stationary. However, when there is internal leakage, it will cause the cylinder piston to retract. At this time, it is necessary to replenish the oil in the cylinder 700 chamber to reset the cylinder piston to its original position. However, the flow rate and power of the main pump 520 and the main force 510 of the hydraulic system are relatively large. If the pressure oil is provided by the main pump 520, it will be difficult to control the micro-motion of the cylinder 700 and a lot of energy will be wasted. In this embodiment, the hydraulic oil in the input cylinder 700 is driven by the drive unit 320 of the cylinder piston control device. Specifically, the drive unit 320 includes a motor 322 and an auxiliary pump 321. The motor 322 has a smaller power output than the main pump 510, and the auxiliary pump 321 has a smaller displacement than the main pump 520, in order to achieve micro-motion control of the cylinder 700 and reduce energy consumption. The motor 322 is connected to the switching circuit 310. When the switching circuit 310 is turned on, the motor 322 starts to run. The auxiliary pump 321 is mechanically connected to the motor 322. When the motor 322 is running, it drives the auxiliary pump 321 to run. The auxiliary pump 321 delivers hydraulic oil to the cylinder 700 through the oil pipe.

[0097] In one embodiment, it also includes:

[0098] The main control switch module is connected to the drive module 300 and the control module 200 respectively.

[0099] In this embodiment, it should be noted that the main control switch module is connected to the drive module 300 and the control module 200. The drive module 300 includes a power supply unit 330. The on / off state of the main control switch module can control the power supply and power-off state of the control module 200. The control module 200 can control the conduction and disconnection of the switch circuit 310 in the drive module 300, thereby controlling the start and stop of the drive unit 320 in the drive module 300.

[0100] In one embodiment, the main control switch module includes:

[0101] Main control unit 420; and

[0102] Third switching unit 410;

[0103] The first end of the third switch unit 410 is connected to the power supply unit 330 of the drive module 300, the second end of the third switch unit 410 is connected to the switch circuit 310 of the control module 200 and the drive module 300 respectively, and the third end of the third switch unit 410 is connected to the main control unit 420.

[0104] The main control unit 420 is configured to control the activation of the third switching unit 410 when the hydraulic cylinder 700 stops working.

[0105] In this embodiment, it should be noted that the main control switch module includes a main control unit 420 and a third switch unit 410, the drive module 300 includes a power supply module and a switch circuit 310, the first end of the third switch unit 410 is connected to the power supply unit 330 of the drive module 300, the second end of the third switch unit 410 is connected to the control module 200 and the switch circuit 310 of the drive module 300 respectively, and the third end of the third switch unit 410 is connected to the main control unit 420. The main control unit 420 controls the conduction of the third switch unit 410 when the oil cylinder 700 stops working.

[0106] refer to Figure 3 In one embodiment, the third switching unit 410 includes a second contactor, which includes a normally closed contact: a fifth contact 365. The main control unit 420 is connected to the main pump 520 of the hydraulic system. When the equipment is working normally, the main control unit 420 controls the main force 510 to drive the main pump 520 to provide hydraulic oil for the extension and retraction of the cylinder 700. At the same time, the main control unit 420 works, controlling the second contactor to be energized, the normally closed fifth contact 365 to open, the second contactor to open, that is, the third switching unit 410 to open. When the equipment is stopped or in standby mode, the cylinder 700 is stationary, the main force 510 and the main pump 520 stop working, the main control unit 420 will stop or be in standby mode, at this time the second contactor is de-energized, the fourth contact 364 is normally closed, the second contactor to conduct, that is, the third switching unit 410 to conduct.

[0107] In this embodiment of the invention, the control module 200 includes a meter counter.

[0108] In this embodiment, it should be noted that the control module 200 can be a meter counter. By using a meter counter as the control module 200, no computer or other complex controller is needed, the control system is simple, and only conventional standardized components are selected, effectively reducing system costs. In one embodiment, the control module 200 may also be implemented using other types of controllers such as a PLC (Programmable Logic Controller). In one embodiment, the meter counter may include an encoder 105 input module, a setting input module, an output reset module, a first control unit 201, and a second control unit 202. The encoder 105 input module is used to receive displacement parameters output by the sampling module 100; the setting input module is used to receive input rising offset thresholds and falling offset thresholds; the output reset module is used to perform a function reset and restore the default state after the oil compensation of the oil chamber of the cylinder 700 is completed; the first control unit 201 and the second control unit 202 are used to control the drive module 300.

[0109] refer to Figure 4The main control unit 420 de-energizes the coil of the third switch unit 410, closes the fifth contact 365, turns on the third switch unit 410, and powers on the control module 200. The output reset module in the control module 200 resets the devices in the switching circuit 310. The control module 200 determines the control signal based on the displacement parameters and preset upward and downward offset thresholds. The sampling module 100 detects the displacement parameters of the cylinder piston in real time. When the displacement parameters are less than or equal to the downward offset threshold, it controls the first control unit 201 to close, so as to output the first control signal to connect the first switch device 311 and the second switch device 312, that is, controls the first switch unit 340 to turn on, so as to turn on the second switch unit 313, thereby enabling the connection between the drive unit 320 and the power supply unit 330. The motor 322 of the drive unit 320 starts, driving the auxiliary pump 321 to work and drive the hydraulic oil into the cylinder 700 through the oil pipe. When the displacement parameter is greater than the falling offset threshold and less than the rising offset threshold, the first control unit 201 is disconnected, the first switch unit 340 is self-closing and conducting, so that the second switch unit 313 is conducting, thereby maintaining the connection between the drive unit 320 and the power supply unit 330. The motor 322 of the drive unit 320 starts, driving the auxiliary pump 321 to work and continuously drive hydraulic oil into the oil cylinder 700 through the oil pipe. When the displacement parameter is greater than or equal to the rising offset threshold, the second control unit 202 is closed, and a second control signal is output to turn off the second switching device 312, thereby turning off the first switching unit 340, disconnecting the drive unit 320 from the power supply unit 330, stopping the motor 322 of the drive unit 320, and stopping the movement of the cylinder piston. The main control switch module controls the power supply to the control module 200 according to the start and stop of the cylinder's main power module. When the control module 200 is powered on, it continuously determines the control signal based on the displacement parameter and the preset rising offset threshold and falling offset threshold to realize the cycle of hydraulic oil compensation of the cylinder 700 until the control module 200 is de-energized.

[0110] In existing technologies, precise control of the cylinder piston position typically focuses on accurately controlling the extension speed and extension length of the cylinder 700, or on integrating the cylinder 700's own extension displacement sensor. Neither approach effectively solves the technical problem of resetting the cylinder piston after a position change. In this embodiment, a sampling module 100 collects and outputs displacement parameters corresponding to the cylinder piston. Based on these displacement parameters, it determines whether the current cylinder piston has changed position relative to its initial position. A control module 200 is connected to the sampling module 100, enabling the control module 200 to output a control signal to the connected drive module 300 based on these displacement parameters. The drive module 300 is connected to the cylinder 700 via an oil pipe. Upon receiving the control signal, it drives hydraulic oil into the cylinder 700, causing the cylinder piston to move towards its initial position. This compensates for volume changes in the hydraulic oil chamber of the cylinder 700 caused by internal leakage, ensuring the stability of the cylinder piston position and improving the reliability and stability of the equipment during use. Furthermore, by using a meter counter as the control module 200, no computer or other complex controller is required, resulting in a simple control system that uses only conventional standardized components, effectively reducing system costs. Moreover, the equipment's own backup battery can be used as the power supply unit 330 to provide energy, eliminating the need for the main power unit 510 to operate, thus saving energy and reducing emissions. This also does not affect the normal function of the main power unit 510 or the main pump 520's oil circuit. The equipment's attitude can be maintained at a very low cost. Through a small-power motor 322 and a small-displacement auxiliary pump 321, there is no need to configure a flow control valve. Utilizing the small-displacement auxiliary pump 321's characteristic of outputting a tiny flow rate, good micro-movement is achieved during oil replenishment, with low standby power consumption and low operating energy consumption.

[0111] This invention provides a hydraulic cylinder control system, comprising:

[0112] Hydraulic cylinder main power module;

[0113] The hydraulic cylinder piston control device according to the above embodiments; and

[0114] 600-degree check valve;

[0115] The hydraulic cylinder's main power module is connected to the hydraulic cylinder piston control device;

[0116] The drive module 300 of the hydraulic cylinder piston control device is connected to the hydraulic cylinder 700 of the hydraulic cylinder power module via an oil pipe. A one-way valve 600 is installed on the oil pipe and is used to allow hydraulic oil to flow from the drive module 300 to the hydraulic cylinder 700 only.

[0117] In this embodiment, it should be noted that the hydraulic cylinder active power module is used to provide hydraulic oil for the extension and retraction of the hydraulic cylinder 700 when the hydraulic system is working normally. The hydraulic cylinder piston control device is used to reduce or eliminate the influence of internal leakage on the position of the hydraulic cylinder piston when the hydraulic cylinder 700 is stationary. The one-way valve 600 is provided on the oil pipe between the hydraulic cylinder piston control device and the hydraulic cylinder 700, allowing hydraulic oil to flow from the drive module 300 of the hydraulic cylinder piston control device to the hydraulic cylinder 700 only.

[0118] Specifically, the hydraulic cylinder power module includes a power source 510, a main pump 520, a cylinder holding valve 560, a solenoid directional valve 550, and a hydraulic cylinder 700. One end of the power source 510 is connected to the drive module 300 of the hydraulic cylinder piston control device, and the other end of the power source 510 is mechanically connected to one end of the main pump 520. The other end of the main pump 520, the cylinder holding valve 560, the solenoid directional valve 550, and the hydraulic cylinder 700 are connected in sequence through oil pipes. The sampling module 100 of the control system is installed on the hydraulic cylinder 700.

[0119] When the hydraulic cylinder 700 is operating normally, the main power 510 drives the hydraulic oil output by the main pump 520 to enter the oil chamber of the hydraulic cylinder 700 through the solenoid directional valve 550 and the cylinder holding valve 560. The movement direction of the hydraulic cylinder 700 is controlled by the solenoid directional valve 550. When the hydraulic cylinder 700 is stationary, the balance valve in the cylinder holding valve 560 keeps the position of the cylinder piston stationary. In one embodiment, the hydraulic cylinder main power module also includes an overflow valve 530 and a filter 540 disposed between the main pump 520 and the solenoid directional valve 550.

[0120] The aforementioned hydraulic cylinder control system provides hydraulic oil to the hydraulic cylinder 700 for telescopic movement during normal operation of the hydraulic system via the hydraulic cylinder active power module. When the hydraulic cylinder 700 is stationary, the hydraulic cylinder piston control device replenishes oil to the cylinder 700 based on the collected displacement parameters of the cylinder piston. This compensates for the volume change in the oil chamber of the cylinder 700 caused by internal leakage, reducing or eliminating the impact of internal leakage on the position of the cylinder piston.

[0121] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0122] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0123] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0124] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A ram piston control device, characterized by, The application relates to a hydraulic cylinder displacement control system, comprising: a sampling module for collecting and outputting displacement parameters of a cylinder piston; a control module connected with the sampling module and configured to output a control signal according to the displacement parameters; a driving module connected with the control module, the driving module being further configured to drive hydraulic oil into the cylinder to move the cylinder piston towards an initial position based on the control signal; the driving module comprising: a switching circuit; a driving unit; and a power supply unit; wherein one end of the switching circuit is connected with the control module, and the other end of the switching circuit is connected with the driving unit and the power supply unit respectively, and the driving unit is further configured to be connected with the cylinder through an oil pipe; the switching circuit comprising: a first switching unit, one end of the first switching unit being connected with the control module; a second switching unit, the other end of the first switching unit being connected with one end of the second switching unit, and the other end of the second switching unit being connected with the driving unit and the power supply unit respectively; the control module being further configured to: output a first control signal to control the first switching unit to be turned on when it is detected that the displacement parameter is less than or equal to a falling offset threshold, so as to turn on the second switching unit and connect the driving unit and the power supply unit; the driving unit comprising: a motor connected with the switching circuit; an auxiliary pump mechanically connected with the motor, the auxiliary pump being connected with the cylinder through an oil pipe. the first switching unit comprising:

2. The ram piston control apparatus of claim 1, wherein a first switching device; and a second switching device; a first end of the first switching device being connected with a first end of the second switching device, a second end of the first switching device and a second end of the second switching device being connected with the control module respectively, and a third end of the second switching device being connected with the second switching unit; the control module being further configured to: output a first control signal to turn on the first switching device and the second switching device when it is detected that the displacement parameter is less than or equal to the falling offset threshold; output a second control signal to turn off the second switching device when it is detected that the displacement parameter is greater than or equal to a rising offset threshold, wherein the rising offset threshold is greater than the falling offset threshold. the control module comprising:

3. The ram piston control apparatus of claim 2 wherein, a first control unit, the power supply unit being connected with the second end of the first switching device through the first control unit, the first control unit being used to be closed to output a first control signal when it is detected that the displacement parameter is less than or equal to a preset falling offset threshold; a second control unit, the power supply unit being connected with the second end of the second switching device through the second control unit, the second control unit being used to be closed to output a second control signal when it is detected that the displacement parameter is greater than or equal to a preset rising offset threshold. further comprising:

4. The ram piston control apparatus of claim 1 wherein, a master control switching module connected with the driving module and the control module respectively. the master control switching module comprising:

5. The ram piston control apparatus of claim 4 wherein, a master control unit; and a third switching unit. ​ The first end of the third switch unit is connected with the power supply unit of the driving module, the second end of the third switch unit is connected with the switch circuit of the control module and the driving module respectively, and the third end of the third switch unit is connected with the main control unit. The main control unit is configured to control the conduction of the third switch unit when the oil cylinder stops working.

6. The ram piston control apparatus of claim 1 wherein, The control module comprises a meter.

7. A ram control system characterized by, The oil cylinder active power module is connected with the oil cylinder piston control device. The oil cylinder piston control device comprises: A one-way valve; The driving module of the oil cylinder piston control device is connected with the oil cylinder of the oil cylinder active power module through an oil pipe, the one-way valve is arranged on the oil pipe, and the one-way valve is used to allow hydraulic oil to flow from the driving module to the oil cylinder only. The oil cylinder active power module further comprises a main power, a main pump, an oil cylinder holding valve and an electromagnetic reversing valve, one end of the main power is connected with the driving module of the oil cylinder piston control device, the other end of the main power is mechanically connected with one end of the main pump, the other end of the main pump, the oil cylinder holding valve, the electromagnetic reversing valve and the oil cylinder are sequentially connected through an oil pipe, and a sampling module of the control system is installed on the oil cylinder. The oil cylinder active power module is connected with the oil cylinder piston control device. The driving module of the oil cylinder piston control device is connected with the oil cylinder of the oil cylinder active power module through an oil pipe, the one-way valve is arranged on the oil pipe, and the one-way valve is used to allow hydraulic oil to flow from the driving module to the oil cylinder only.

8. The ram control system of claim 7, wherein, The oil cylinder active power module further comprises a main power, a main pump, an oil cylinder holding valve and an electromagnetic reversing valve, one end of the main power is connected with the driving module of the oil cylinder piston control device, the other end of the main power is mechanically connected with one end of the main pump, the other end of the main pump, the oil cylinder holding valve, the electromagnetic reversing valve and the oil cylinder are sequentially connected through an oil pipe, and a sampling module of the control system is installed on the oil cylinder.

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