A wireless hydraulic actuator assembly and a wireless hydraulic control system

Abstract

The present invention relates to a wireless hydraulic actuator assembly and a wireless hydraulic control system. The wireless hydraulic actuator assembly includes an actuator, a pump, a servo motor, a wireless solenoid valve, and an accumulator. The servo motor is in driving connection with the pump. The pump is connected to the actuator through the wireless solenoid valve. An accumulator is provided between the wireless solenoid valve and the rodless cavity of the actuator. A first resonant capacitor is integrated in the wireless solenoid valve; or, a first resonant capacitor is integrated in the wireless solenoid valve and a second resonant capacitor is integrated in the servo motor. The wireless hydraulic actuator assembly of this embodiment can achieve wireless charging through magnetic field resonance by setting the wireless solenoid valve and using the first resonant capacitor and the second resonant capacitor. It is possible to integrate a wireless hydraulic actuator assembly without a comprehensive hydraulic power station, hydraulic pipelines, and cables by using the self-circulating power integration technology of the actuator and products such as the wireless solenoid valve.

Description

Technical Field

[0001] The present invention relates to the technical field of supporting equipment in the fields of petroleum and other engineering technologies, and particularly relates to a wireless hydraulic actuator assembly and a wireless hydraulic control system. Background Art

[0002] A hydraulic transmission system is a type of transmission device. Based on Pascal's principle of fluid mechanics, it uses liquid as the working medium for energy transfer and control. Due to its advantages such as high power density, fast response, stepless speed regulation, and easy implementation of remote control, it is widely used in oil fields and other industries. It mainly consists of four parts: a power source, an actuator, a control section, and an auxiliary section. The power source includes a hydraulic pump and a prime mover (motor, engine), and its function is to convert mechanical energy into hydraulic energy; the actuator includes a hydraulic cylinder and a hydraulic motor, and its function is to convert hydraulic energy into mechanical energy to drive a load; the control section includes pressure, flow, and direction control valves to achieve the control of the force, speed, and direction of the actuator; the auxiliary section includes an oil tank, hydraulic accessories, hydraulic pipelines, etc., which connect each part and provide an oil source.

[0003] The traditional hydraulic control system design scheme is that multiple actuators share a comprehensive large power station. The wiring method is that the power station, control valve group, and actuator are separated, and hydraulic pipelines are used to connect them in the middle for power transmission. At present, hydraulic solenoid control valves are all actively connected to achieve power and signal transmission, and the electric control system is connected to various parts of the hydraulic system through cables to achieve action control. This traditional wired hydraulic control system has a very large number of cables when controlling multiple actuators, which will cause a large amount of wiring work, a large floor area, increase system leakage and pressure loss, thereby reducing system efficiency, a high risk of hose bursting and personal danger, high cost, and a heavy burden on later maintenance.

[0004] At present, most mechanical equipment at oil fields is driven by traditional wired hydraulic systems, and there are many actuators. Due to the disadvantages of traditional wired hydraulic systems, it is inevitable to increase the cost investment of oil equipment and the burden of on-site installation, commissioning, and maintenance.

[0005] Regarding the above-described traditional hydraulic system technical solution of "multiple actuators sharing a comprehensive large power station, with the wiring method that the power station, control valve group, and actuator are separated, and hydraulic pipelines are used to connect them in the middle for power transmission", there are already actuator actuators in the domestic and foreign hydraulic industry markets, that is, integrating the hydraulic station and the actuator together, which consists of an oil tank, a hydraulic pump, and a hydraulic valve actuator. The actuator itself is an independent power unit. Problems exist: there is still a wired connection between the hydraulic solenoid valve and the electric control system, and between the hydraulic valve group and the actuator. The representative manufacturer name and product name are Rexroth electro-hydraulic actuator.

[0006] Regarding the problem described above, "All hydraulic electromagnetic control valves achieve power and signal transmission through active connections. The electronic control system is connected to various parts of the hydraulic system through cables to achieve action control. When controlling the working conditions of multiple actuators, there are a large number of cables, which will result in a large wiring workload and increase the burden of on-site installation, commissioning, and maintenance." The solutions for components such as active solenoid valves and active sensors abroad are as follows: For the problem of active connection of traditional hydraulic valves, the solution is to integrate a self-power generation device in the hydraulic module of each actuator, and solve the problem of remote active power supply for solenoid valves through internal active connection; solve the problem of remote communication through a Bluetooth wireless plug. However, the problems that still exist are: ① The actuator is separated from the power source, and the hydraulic pipeline cannot be omitted; ② The solenoid valve is still actively connected, and the internal cable is not omitted; ③ The power generation device module is complex, occupies a large space, and the voltage is unstable. For example, the invention patent with the publication number US11909206B2 and the patent name "Hydraulic Systems and Components Including Wireless Control Technology".

[0007] In addition, the invention patent with the publication number CN 109538262 A discloses a wireless power supply mining electromagnetic pilot valve, which completely abandons the method of using a cable connector to connect through a waterproof plug for driving the existing mining electromagnetic pilot valve, and adopts a wireless power supply method to solve the problem of inconvenient docking of the pins during installation. By completely encapsulating the wireless power supply part, the protection performance is better, and it solves the problem that coal ash and sewage flow into the socket during the later maintenance of the electromagnetic pilot valve, resulting in poor contact, and the problem of a large amount of sealing work at the plug and socket. However, this patent still cannot solve the problem of wireless connection and control of the entire hydraulic system. Summary of the Invention

[0008] The present invention provides a wireless hydraulic actuator assembly and a wireless hydraulic control system to solve one or several of the technical problems existing in the prior art.

[0009] The technical solution of the present invention to solve the above technical problems is as follows: A wireless hydraulic actuator assembly includes an actuator, a pump, a servo motor, a wireless solenoid valve group, and an accumulator. The wireless solenoid valve group includes a wireless solenoid valve. The servo motor is in transmission connection with the pump. The pump is connected to the actuator through the wireless solenoid valve. An accumulator is provided between the wireless solenoid valve and the rodless cavity of the actuator;

[0010] A first resonant capacitor is integrated in the wireless solenoid valve to form a first resonant circuit; or, a first resonant capacitor is integrated in the wireless solenoid valve to form a first resonant circuit and a second resonant capacitor is integrated in the servo motor to form a second resonant circuit.

[0011] The beneficial effects of the present invention are as follows: The wireless hydraulic actuator assembly of the present invention can achieve wireless charging through magnetic field resonance by setting a wireless solenoid valve and using a first resonant capacitor and a second resonant capacitor. It can integrate products such as the self-circulating power integration technology of the actuator and the wireless solenoid valve to form a wireless hydraulic actuator assembly without a comprehensive hydraulic power station, hydraulic pipelines, and cables. There is no longer a comprehensive power station, a large number of hydraulic pipelines, and cables on-site. The wireless hydraulic actuator assembly itself, as a complete hydraulic system independent module, replaces the traditional actuators on the device and realizes the working conditions requirements according to the technological process through the control system.

[0012] Based on the above technical solutions, the present invention can be further improved as follows.

[0013] Further, a first rectifier, a first filter, and a Bluetooth module are also integrated in the wireless solenoid valve, and a first resonant capacitor is connected in series to each coil of the wireless solenoid valve;

[0014] A second rectifier and a second filter are also integrated in the servo motor, and the second resonant capacitor is connected in series to the coil of the servo motor.

[0015] The beneficial effects of adopting the above further solution are: By setting rectifiers and filters, the anti-interference ability and transmission efficiency can be improved, and the misoperation of the wireless solenoid valve and the servo motor can be avoided. The setting of the Bluetooth module can realize signal transmission.

[0016] Further, the pump, the servo motor, the wireless solenoid valve group, and the accumulator are all integrated on the actuator. The wireless solenoid valve group is respectively connected to the inlet and outlet of the pump through an internal hydraulic flow channel, and the wireless solenoid valve group is also respectively connected to the rodless cavity and the rod cavity of the actuator through an internal hydraulic flow channel; The accumulator is integrated in the wireless solenoid valve group and is connected to the internal hydraulic flow channel where the rodless cavity is located through a liquid replenishment flow channel.

[0017] The beneficial effects of adopting the above further solution are: Integrating all components on the actuator makes the entire wireless hydraulic actuator assembly an independent whole, which is convenient for use, replacement, etc., and is convenient to replace the traditional separate wired hydraulic system as an independent functional module.

[0018] Further, the wireless solenoid valve is a three-position four-way wireless solenoid valve, a first hydraulic control one-way valve is provided on the internal hydraulic flow channel between the accumulator and the rodless cavity, and the internal hydraulic flow channel where the rod cavity is located is connected to the first hydraulic control one-way valve through a one-way valve hydraulic flow channel.

[0019] Further, the wireless solenoid valve is a first two-position four-way wireless solenoid valve, and a second two-position four-way wireless solenoid valve is also integrated in the wireless solenoid valve group;

[0020] A first pilot-operated check valve is provided on the built-in hydraulic flow channel where the rodless chamber is located, and a second pilot-operated check valve is provided on the built-in hydraulic flow channel where the rod chamber is located. A check valve hydraulic flow channel communicating with the first pilot-operated check valve and the second pilot-operated check valve respectively is further provided in the wireless solenoid valve group; the second two-position four-way wireless solenoid valve is respectively communicated with the inlet and outlet of the pump and the check valve hydraulic flow channel.

[0021] Furthermore, the wireless solenoid valve includes a wireless proportional direction valve and a wireless proportional pressure reducing valve. A first pilot-operated check valve is provided on the built-in hydraulic flow channel where the rodless chamber is located, and the built-in hydraulic flow channel where the rod chamber is located is communicated with the first pilot-operated check valve through a check valve hydraulic flow channel.

[0022] A wireless hydraulic control system includes the above-mentioned wireless hydraulic actuator assembly, and further includes a first energy transmission device, or further includes a first energy transmission device and a second energy transmission device;

[0023] When the resonance frequency of the first energy transmission device is consistent with the resonance frequency of the first resonance circuit, the wireless solenoid valve is energized and operates; when the resonance frequency of the first energy transmission device is inconsistent with the resonance frequency of the first resonance circuit, the wireless solenoid valve is de-energized and stops working;

[0024] When the resonance frequency of the second energy transmission device is consistent with the resonance frequency of the second resonance circuit, the servo motor is energized and operates; when the resonance frequency of the second energy transmission device is inconsistent with the resonance frequency of the second resonance circuit, the servo motor is de-energized and stops working.

[0025] The beneficial effects of the present invention are as follows: Compared with the traditional wired hydraulic system, the wireless hydraulic control system of the present invention reduces energy consumption by 40% and reduces the oil volume by 75%. It can realize no comprehensive hydraulic power station, no hydraulic pipelines and no large quantities of cables on site. As a complete hydraulic system functional module by itself, it replaces the traditional actuators on the device. By controlling the wireless solenoid valve according to the technological process to meet the working conditions requirements, it greatly reduces the on-site construction workload and construction period, reduces the floor area of the hydraulic system, and reduces the equipment installation, commissioning, maintenance burden and cost. At the same time, due to the reduction of energy consumption and the absence of cables, it also greatly reduces the cost investment of the drilling rig hydraulic system, and can achieve cost reduction and efficiency improvement. Taking a single in-service oil drilling rig on site as an example, the application of the wireless hydraulic system can save about 9 million yuan in costs.

[0026] Furthermore, when the wireless solenoid valve is a three-position four-way wireless solenoid valve,

[0027] The actuator lifts the load upward: Set the resonance frequency of the first energy transmission device to be consistent with the resonance frequency of the first resonance circuit where the left coil of the three-position four-way wireless solenoid valve is located, and the left position of the three-position four-way wireless solenoid valve is energized and actuated; The pump, driven by the servo motor, delivers hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve is located. The hydraulic oil enters the rodless cavity of the actuator through the three-position four-way wireless solenoid valve and the first hydraulic control check valve. The actuator moves upward. The oil in the rod chamber of the actuator flows into the inlet of the pump through the oil return passage of the three-position four-way wireless solenoid valve, and then flows into the rodless cavity of the actuator through the pump. The oil quantity difference between the rodless cavity and the rod chamber is replenished by the accumulator;

[0028] The actuator moves downward: Set the resonance frequency of the first energy transmission device to be consistent with the resonance frequency of the first resonance circuit where the right coil of the three-position four-way wireless solenoid valve is located, and the right position of the three-position four-way wireless solenoid valve is energized and actuated; The pump, driven by the servo motor, delivers hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve is located. The hydraulic oil enters the rod chamber of the actuator through the three-position four-way wireless solenoid valve. The actuator moves downward. The oil in the rodless cavity of the actuator flows into the inlet of the pump through the oil return passage of the three-position four-way wireless solenoid valve, and then flows into the rod chamber of the actuator through the pump. The excess oil in the rodless cavity flows into the accumulator;

[0029] The actuator stops: Set the resonance frequency of the first energy transmission device to be inconsistent with the resonance frequency of the first resonance circuit inside the three-position four-way wireless solenoid valve. The three-position four-way wireless solenoid valve loses power and stops working, and the three-position four-way wireless solenoid valve maintains the middle position; The first hydraulic control check valve loses pressure and closes to seal the oil quantity in the rodless cavity of the actuator, and the position of the actuator is maintained.

[0030] Furthermore, when the wireless solenoid valve is the first two-position four-way wireless solenoid valve, a second two-position four-way wireless solenoid valve is also integrated in the wireless solenoid valve group. At this time,

[0031] The actuator lifts the load upward: Set the resonance frequency of the first energy transmission device to be the same as the resonance frequency of the first resonance circuit where the left coil of the first two-position four-way wireless solenoid valve and the second two-position four-way wireless solenoid valve is located. The first two-position four-way wireless solenoid valve and the left position of the second two-position four-way wireless solenoid valve are energized and actuated. The pump, driven by the servo motor, delivers hydraulic oil to the two two-position four-way wireless solenoid valves. The hydraulic oil enters the control chambers of the two pilot-operated check valves through the left-position pressure channel of the second two-position four-way wireless solenoid valve, opening the channels of the first pilot-operated check valve and the second pilot-operated check valve. Then, the system hydraulic oil passes through the left-position pressure channel of the first two-position four-way wireless solenoid valve and the two pilot-operated check valves and enters the rodless cavity of the actuator. The actuator moves upward. The oil in the rod chamber of the actuator flows into the inlet of the pump through the oil return passage of the first two-position four-way wireless solenoid valve and then into the rodless cavity of the actuator through the pump. The oil volume difference between the rodless cavity and the rod chamber is supplemented by the accumulator.

[0032] The actuator moves downward: Set the resonance frequency of the first energy transmission device to be the same as the resonance frequency of the first resonance circuit where the left coil of the second two-position four-way wireless solenoid valve is located and different from the resonance frequency of the first resonance circuit where the left coil of the first two-position four-way wireless solenoid valve is located. The left position of the second two-position four-way wireless solenoid valve is energized, and the first two-position four-way wireless solenoid valve is de-energized and remains in the right position. The pump, driven by the servo motor, delivers hydraulic oil. The hydraulic oil enters the control chambers of the first pilot-operated check valve and the second pilot-operated check valve through the left-position pressure oil channel of the second two-position four-way wireless solenoid valve, opening the hydraulic flow passage of the check valve. The hydraulic oil passes through the right-position pressure channel of the first two-position four-way wireless solenoid valve, the first pilot-operated check valve, and the second pilot-operated check valve and enters the rod chamber of the actuator. The actuator moves downward. The oil in the rodless cavity of the actuator flows into the inlet of the pump through the oil return passage of the first two-position four-way wireless solenoid valve and then into the rod chamber of the actuator through the pump. The excess oil in the rodless cavity flows into the accumulator through the first pilot-operated check valve and the second pilot-operated check valve.

[0033] The actuator stops moving: Set the resonance frequency of the first energy transmission device to be different from the resonance frequency of the first resonance circuit inside the second two-position four-way wireless solenoid valve. The second two-position four-way wireless solenoid valve is de-energized and stops working. The second two-position four-way wireless solenoid valve remains in the right position. The first pilot-operated check valve and the second pilot-operated check valve are depressurized and closed, sealing the oil volumes in the rodless cavity and the rod chamber of the actuator, and the position of the actuator is maintained.

[0034] Furthermore, when the wireless solenoid valve includes a wireless proportional direction valve and a wireless proportional pressure reducing valve,

[0035] The actuating element lifts the load upward: Set the resonant frequency of the first energy transmitting device to be the same as the resonant frequency of the first resonant capacitor connected to the wireless proportional direction valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional direction valve is between 4 mA and 12 mA, the spool of the wireless proportional direction valve moves to the left position. The pump delivers hydraulic oil under the drive of the servo motor. The hydraulic oil passes through the wireless proportional pressure reducing valve, the left-position pressure oil passage of the wireless proportional direction valve, and the first pilot-operated check valve and enters the rodless chamber of the actuating element. The actuating element moves upward. The oil in the rod chamber of the actuating element flows into the inlet of the pump through the left-position oil return passage of the wireless proportional direction valve, and then flows into the rodless chamber of the actuating element through the pump. The difference in the oil volume between the rodless chamber and the rod chamber is compensated by the accumulator.

[0036] The actuating element moves downward: Set the resonant frequency of the first energy transmitting device to be the same as the resonant frequency of the first resonant capacitor connected to the wireless proportional direction valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional direction valve is between 12 mA and 20 mA, the spool of the wireless proportional direction valve moves to the right position. The pump delivers hydraulic oil under the drive of the servo motor. The hydraulic oil passes through the wireless proportional pressure reducing valve, the right-position pressure oil passage of the wireless proportional direction valve, and the first pilot-operated check valve and enters the rod chamber of the actuating element. The actuating element moves downward. The oil in the rodless chamber of the actuating element flows into the inlet of the pump through the right-position oil return passage of the wireless proportional direction valve, and then flows into the rod chamber of the actuating element through the pump. The excess oil in the rodless chamber flows into the accumulator through the first pilot-operated check valve.

[0037] The actuating element stops operating: Set the resonant frequency of the first energy transmitting device to be different from the resonant frequency of the first resonant capacitor integrated in the wireless proportional direction valve and the wireless proportional pressure reducing valve. The wireless proportional direction valve and the wireless proportional pressure reducing valve lose power and stop working, and the wireless proportional direction valve and the wireless proportional pressure reducing valve maintain the middle position; The first pilot-operated check valve loses pressure and closes, sealing the oil volume in the rodless chamber of the actuating element, and the position of the actuating element is maintained. Description of the Drawings

[0038] Figure 1 It is the structural block diagram of the wireless solenoid valve of the present invention;

[0039] Figure 2 It is the structural block diagram of the wireless motor of the present invention;

[0040] Figure 3 It is the structural block diagram of the wireless hydraulic actuating system of the present invention;

[0041] Figure 4 It is the schematic diagram of the wireless solenoid valve of the present invention;

[0042] Figure 5 It is the schematic diagram of the wireless motor of the present invention;

[0043] Figure 6Structural schematic diagram of the wireless solenoid valve of the present invention;

[0044] Figure 7 Structural schematic diagram of the wireless motor of the present invention;

[0045] Figure 8 Structural schematic diagram of the wireless hydraulic actuator assembly of the present invention;

[0046] Figure 9 Structural schematic diagram of the wireless hydraulic actuator system of the present invention;

[0047] Figure 10 Structural schematic diagram of Embodiment 1 of the present invention;

[0048] Figure 11 Structural schematic diagram of Embodiment 2 of the present invention;

[0049] Figure 12 Structural schematic diagram of Embodiment 3 of the present invention.

[0050] In the drawings, the list of components represented by each reference numeral is as follows:

[0051] 100, wireless solenoid valve; 101, valve body; 102, spool; 103, solenoid valve coil; 04, electromagnet; 105, built-in hydraulic flow channel;

[0052] 200, wireless motor; 201, junction box; 300, wireless hydraulic actuator assembly; 400, charging platform; 500, electric control system; 600, wireless solenoid valve group;

[0053] 1, actuator; 2, pump; 3, servo motor; 4, accumulator; 5, first resonant capacitor; 6, second resonant capacitor; 7, first rectifier; 8, first filter; 9, Bluetooth module; 10, second rectifier; 11, second filter; 12, load; 13, first hydraulic check valve; 14, second hydraulic check valve; 15, three-position four-way wireless solenoid valve; 16, first two-position four-way wireless solenoid valve; 17, second two-position four-way wireless solenoid valve; 18, wireless proportional direction valve; 19, first energy transmission device; 20, second energy transmission device; 21, wireless proportional pressure reducing valve. Detailed implementation manners

[0054] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0055] Embodiment 1

[0056] As Figure 1 、 Figure 4 、 Figure 6 、 Figure 8 and Figure 9As shown in the figure, this embodiment provides a wireless hydraulic actuator assembly 300, which includes an actuator 1, a pump 2, a servo motor 3, a wireless solenoid valve group 600, and an accumulator 4. The wireless solenoid valve group 600 includes a wireless solenoid valve 100. The servo motor 3 is drivingly connected to the pump 2. The pump 2 is connected to the actuator 1 through the wireless solenoid valve 100. An accumulator 4 is provided between the wireless solenoid valve 100 and the rodless chamber of the actuator 1. A first resonant capacitor 5 is integrated in the wireless solenoid valve 100 to form a first resonant circuit. The actuator 1 can be a hydraulic cylinder.

[0057] As Figure 1 shown in the figure, a first rectifier 7, a first filter 8, and a Bluetooth module 9 are also integrated in the wireless solenoid valve 100 of this embodiment. In order to achieve resonant power transmission, there are various ways to integrate the first resonant capacitor 5, such as connecting it in series with a coil, etc. Each solenoid valve coil 103 of the wireless solenoid valve 100 is serially provided with a first resonant capacitor 5. There are also various ways to integrate the first rectifier 7, the first filter 8, and the Bluetooth module 9. It can be in series or parallel connection as long as it can meet the requirements of rectification, filtering, and signal transmission. By setting the rectifier and filter, the anti-interference ability and transmission efficiency can be improved, and the misoperation of the wireless solenoid valve can be avoided. The setting of the Bluetooth module can achieve signal transmission.

[0058] Specifically, the wireless solenoid valve group 600 includes a valve body 101, a valve core 102, an electromagnet 104, and an internal hydraulic flow channel 105. The specific structure can be set according to different needs for different solenoid valves. The first resonant capacitor 5 is installed in the electromagnet 104 of the wireless solenoid valve 100. By setting the first resonant capacitor 5 in the wireless solenoid valve 100, solenoid valves that do not work simultaneously can be set to different frequencies. When a selected solenoid valve needs to work, only the resonant frequency of the energy transmitting device or the charging platform 400 set in the non-explosion-proof area or other positions needs to be made consistent with the resonant frequency of the selected solenoid valve to be worked, and then the energy can be transferred in space through magnetic field resonance, and the solenoid valve is energized to actuate. For example, the working frequency of a single solenoid valve is 26W, and magnetic field resonance can transmit several kilowatts, which can meet the requirements of multiple solenoid valves working simultaneously and frequent commutation. The magnetic field resonance transmission distance can reach dozens of meters, and it can continue to increase with the progress of technology. Installing a Bluetooth receiver and a transceiver in the wireless solenoid valve as the Bluetooth module can complete signal transmission.

[0059] As Figure 3 、 Figures 8 - 9As shown in the figure, the pump 2, servo motor 3, wireless solenoid valve group 600, and accumulator 4 of this embodiment are all integrated on the actuator 1. The wireless solenoid valve group 600 is respectively connected to the inlet and outlet of the pump 2 through the built-in hydraulic flow channel 105. The wireless solenoid valve group 600 is also respectively connected to the rodless cavity and rod cavity of the actuator 1 through the built-in hydraulic flow channel 105. The accumulator 4 is integrated within the wireless solenoid valve group 600 and is connected to the built-in hydraulic flow channel 105 where the rodless cavity is located through a liquid supplement flow channel. Integrating all components on the actuator makes the entire wireless hydraulic actuator assembly an independent whole, facilitating use, replacement, etc., and making it convenient to replace traditional separate wired hydraulic systems as an independent functional module.

[0060] The servo motor 3 in this embodiment can be an ordinary motor with a cable, and there is only one power cable for the entire wireless hydraulic actuator assembly.

[0061] As Figure 10 As shown in the figure, the wireless solenoid valve 100 of this embodiment is a three-position four-way wireless solenoid valve 15. A first pilot-operated check valve 13 is provided on the built-in hydraulic flow channel 105 between the accumulator 4 and the rodless cavity. The built-in hydraulic flow channel 105 where the rod cavity is located is connected to the first pilot-operated check valve 13 through a one-way valve hydraulic flow channel.

[0062] For the wireless hydraulic actuator assembly of this embodiment, the components are highly integrated. With a highly integrated solution, the external hydraulic pipeline is transformed into a valve block built-in hydraulic flow channel, and the pump's rotational speed is controlled to supply oil as needed. By using the principle of oil self-circulation, the oil returned from the actuator is replenished to the accumulator and the actuator. In this way, the accumulator and the actuator itself can be designed according to the single-volume at the maximum stroke of the actuator as the power source. Finally, a wireless hydraulic system without cables, low oil volume, and low energy consumption can be achieved, and the actuator's actions are completed through the control system. Oil self-circulation and accumulator leak compensation ensure sufficient oil volume for the actuator's operation. Based on Pascal's principle, stable pressure transmission can be ensured under the control of the pressure valve, and the integrated components can be adjusted according to the actuator's specifications to limit the installation volume.

[0063] For the wireless hydraulic actuator assembly of this embodiment, by setting a wireless solenoid valve and using the first resonant capacitor, wireless charging can be achieved through magnetic field resonance. A wireless hydraulic actuator assembly without a comprehensive hydraulic power station, hydraulic pipelines, and cables can be integrated with products such as the actuator self-circulation power integration technology and wireless solenoid valves. There is no longer a comprehensive power station, a large number of hydraulic pipelines, and cables on-site. The wireless hydraulic actuator assembly itself, as a complete hydraulic system independent module, replaces the traditional actuator on the device and controls it through the control system to meet the working conditions requirements according to the technological process.

[0064] Embodiment 2

[0065] Different from Embodiment 1, the wireless solenoid valve 100 in this embodiment is a first two-position four-way wireless solenoid valve 16, and a second two-position four-way wireless solenoid valve 17 is also integrated in the wireless solenoid valve group 600; as Figure 11 shown.

[0066] A first pilot-operated check valve 13 is provided on the built-in hydraulic flow channel 105 where the rodless cavity is located, a second pilot-operated check valve 14 is provided on the built-in hydraulic flow channel 105 where the rod-end cavity is located, and a check valve hydraulic flow channel communicating with the first pilot-operated check valve 13 and the second pilot-operated check valve 14 respectively is also provided in the wireless solenoid valve group 600; the second two-position four-way wireless solenoid valve 17 is respectively communicated with the inlet, the outlet of the pump 2 and the check valve hydraulic flow channel.

[0067] Embodiment 3

[0068] Different from Embodiment 1, the wireless solenoid valve 100 in this embodiment includes a wireless proportional direction valve 18 and a wireless proportional pressure reducing valve 21. A first pilot-operated check valve 13 is provided on the built-in hydraulic flow channel 105 where the rodless cavity is located, and the built-in hydraulic flow channel 105 where the rod-end cavity is located is communicated with the first pilot-operated check valve 13 through a check valve hydraulic flow channel. As Figure 12 shown.

[0069] Embodiment 4

[0070] Based on any one of Embodiments 1 to 3, the servo motor 3 in the above embodiments can also use a wireless motor 200.

[0071] Specifically, as Figure 2 , Figure 3 , Figure 5 , Figures 7 - 9 shown, this embodiment provides a wireless hydraulic actuator assembly 300, including an actuator 1, a pump 2, a servo motor 3, a wireless solenoid valve 100 and an accumulator 4. The servo motor 3 is drivingly connected to the pump 2. The pump 2 is connected to the actuator 1 through the wireless solenoid valve 100. An accumulator 4 is provided between the wireless solenoid valve 100 and the rodless cavity of the actuator 1; a first resonant capacitor 5 is integrated in the wireless solenoid valve 100 to form a first resonant circuit, and a second resonant capacitor 6 is integrated in the servo motor 3 to form a second resonant circuit. The servo motor 3 can realize wireless charging by integrating the second resonant capacitor 6. The servo motor 3 obtains the wireless motor 200 through the built-in second resonant capacitor 6.

[0072] As Figure 1 shown, a first rectifier 7, a first filter 8 and a Bluetooth module 9 are also integrated in the wireless solenoid valve 100 in this embodiment. Each coil of the wireless solenoid valve 100 is serially provided with a first resonant capacitor 5; as Figure 2As shown in the figure, a second rectifier 10 and a second filter 11 are also integrated in the servo motor 3 of this embodiment. The second resonant capacitor 6 is serially arranged with the coil of the servo motor 3. By setting the rectifier and the filter, the anti-interference ability and transmission efficiency can be improved, and the misoperation of the wireless solenoid valve and the servo motor can be avoided. The setting of the Bluetooth module can realize signal transmission. There are various ways to integrate the second resonant capacitor 6, such as being serially connected with the coil, etc.; there are also various ways to integrate the second rectifier 10 and the second filter 11, and they can be connected in series or parallel, as long as they can meet the requirements of rectification, filtering and signal transmission.

[0073] Specifically, the second resonant capacitor 6 can be installed in the junction box 201 of the servo motor and connected to the coil of the servo motor. Servo motors that do not work simultaneously can be set with different frequencies. When a selected servo motor needs to work, only the resonant frequency of the energy transmitting device or the high-power charging platform 400 set in the non-explosion-proof area or other positions needs to be made consistent with the resonant frequency of the selected servo motor to be operated, and then the energy spatial transfer can be realized through magnetic field resonance. With the progress of wireless charging technology, it can meet the operation of motors with larger power.

[0074] When in use, the frequency of the second energy transmitting device whose resonant frequency matches it can be set to be the same, and then the electric energy transfer can be obtained through magnetic field resonance to enable the charging operation.

[0075] Embodiment 5

[0076] This embodiment provides a wireless hydraulic control system, which includes a wireless hydraulic actuator assembly 300 according to any one of Embodiments 1 to 3, and also includes a first energy transmitting device 19, as Figure 1 、 Figure 3 、 Figure 4 shown;

[0077] When the resonant frequency of the first energy transmitting device 19 is consistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve 100 is powered on and operates; when the resonant frequency of the first energy transmitting device 19 is inconsistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve 100 is powered off and stops working;

[0078] The charging platform 400 can independently include the first energy transmitting device 19 to realize charging for the wireless solenoid valve 100. The control of all electrical components can be realized through the electric control system 500.

[0079] In this embodiment, the wireless hydraulic control system can reduce energy consumption by 40% and oil volume by 75% compared with the traditional wired hydraulic system. It can achieve no comprehensive hydraulic power station, no hydraulic pipelines, and no large quantities of cables on-site. As a complete hydraulic system functional module itself, it replaces the traditional actuators on the device. By controlling the wireless solenoid valve through the control system to meet the working condition requirements according to the technological process, it greatly reduces the on-site construction workload and construction period, reduces the floor area of the hydraulic system, and lowers the burden and cost of equipment installation, commissioning, and maintenance. At the same time, due to the reduced energy consumption and no cables, the cost investment of the drilling rig hydraulic system is also greatly reduced, achieving cost reduction and efficiency improvement. Taking a single in-service oil drilling rig on-site as an example, the application of the wireless hydraulic system can save about 9 million yuan in costs.

[0080] Embodiment 6

[0081] This embodiment provides a wireless hydraulic control system, which includes a wireless hydraulic actuator assembly 300 of Embodiment 4, and also includes a first energy transmitting device 19 and a second energy transmitting device 20, as Figures 1 - 5 shown; the charging platform 400 may include the first energy transmitting device 19 and the second energy transmitting device 20, that is, the first energy transmitting device 19 and the second energy transmitting device 20 are integrally arranged to achieve charging for the wireless solenoid valve 100 and the wireless motor 200. The control of all electrical components can be realized through the electronic control system 500.

[0082] When the resonance frequency of the first energy transmitting device 19 is consistent with the resonance frequency of the first resonance circuit, the wireless solenoid valve 100 is energized and operates; when the resonance frequency of the first energy transmitting device 19 is inconsistent with the resonance frequency of the first resonance circuit, the wireless solenoid valve 100 is de-energized and stops working;

[0083] When the resonance frequency of the second energy transmitting device 20 is consistent with the resonance frequency of the second resonance circuit, the servo motor 3 is energized and operates; when the resonance frequency of the second energy transmitting device 20 is inconsistent with the resonance frequency of the second resonance circuit, the servo motor 3 is de-energized and stops working.

[0084] The wireless hydraulic control system of this embodiment can reduce energy consumption by 40% and oil volume by 75% compared with the traditional wired hydraulic system. It can achieve a site without a comprehensive hydraulic power station, hydraulic pipelines, and a large number of cables. As a complete hydraulic system functional module itself, it replaces the traditional actuators on the device. The wireless solenoid valve is controlled by the control system to meet the working conditions requirements according to the technological process, greatly reducing the on-site construction workload and construction period, reducing the floor area of the hydraulic system, and lowering the burden and cost of equipment installation, commissioning, and maintenance. At the same time, due to the reduction in energy consumption and the absence of cables, the cost investment in the drilling rig hydraulic system is also significantly reduced, achieving cost reduction and efficiency improvement. Taking a single in-service oil drilling rig on-site as an example, the application of the wireless hydraulic system can save about 9 million yuan in costs.

[0085] Embodiment 7

[0086] Based on Embodiment 5 or Embodiment 6, as Figure 10 shown, when the wireless solenoid valve 100 is a three-position four-way wireless solenoid valve 15, the three-position four-way wireless solenoid valve 15 performs magnetic field resonance through the first energy transmission device to obtain power transmission and is thus charged.

[0087] The actuator 1 lifts the load upward: The resonance frequency of the first energy transmission device 19 is set to be the same as the resonance frequency of the first resonance circuit where the left coil of the three-position four-way wireless solenoid valve 15 is located, generating resonance to transmit power, and the left position of the three-position four-way wireless solenoid valve 15 is energized to actuate; The pump 2 is driven by the servo motor 3 to deliver hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve 15 is located. The hydraulic oil enters the rodless cavity of the actuator 1 through the three-position four-way wireless solenoid valve 15 and the first hydraulic control check valve 13. The actuator 1 moves upward, and the oil in the rod cavity of the actuator 1 flows into the inlet of the pump 2 through the oil return passage of the three-position four-way wireless solenoid valve 15 and then into the rodless cavity of the actuator 1 through the pump 2. The oil volume difference between the rodless cavity and the rod cavity is supplemented by the accumulator 4;

[0088] The actuator 1 moves downward: The resonance frequency of the first energy transmission device 19 is set to be the same as the resonance frequency of the first resonance circuit where the right coil of the three-position four-way wireless solenoid valve 15 is located, generating resonance to transmit power, and the right position of the three-position four-way wireless solenoid valve 15 is energized to actuate; The pump 2 is driven by the servo motor 3 to deliver hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve 15 is located. The hydraulic oil enters the rod cavity of the actuator 1 through the three-position four-way wireless solenoid valve 15. The actuator 1 moves downward, and the oil in the rodless cavity of the actuator 1 flows into the inlet of the pump through the oil return passage of the three-position four-way wireless solenoid valve 15 and then into the rod cavity of the actuator 1 through the pump 2. The excess oil in the rodless cavity flows into the accumulator 4, and the first hydraulic control check valve 13 can control the speed of the actuator when it moves downward without losing control;

[0089] The actuating element 1 stops operating: The resonance frequency of the first energy transmitting device 19 is set to be inconsistent with the resonance frequency of the first resonance circuit in the three-position four-way wireless solenoid valve 15. The three-position four-way wireless solenoid valve 15 loses power and stops working, and the three-position four-way wireless solenoid valve 15 maintains the middle position; The first hydraulic control check valve 13 loses pressure and closes, sealing the oil volume in the rodless cavity of the actuating element 1. The position of the actuating element 1 is maintained and the operation stops.

[0090] Embodiment 8

[0091] Based on Embodiment 5 or Embodiment 6, as Figure 11 shown, when the wireless solenoid valve 100 is the first two-position four-way wireless solenoid valve 16, a second two-position four-way wireless solenoid valve 17 is also integrated in the wireless solenoid valve group 600. At this time, the wireless solenoid valve group 600 performs magnetic field resonance through the first energy transfer device to obtain power transfer and is thus charged.

[0092] The actuating element 1 lifts the load 12 upward: The resonance frequency of the first energy transmitting device 19 is set to be consistent with the resonance frequency of the first resonance circuit where the left coils of the first two-position four-way wireless solenoid valve 16 and the second two-position four-way wireless solenoid valve 17 are located to generate resonance for power transfer; The left positions of the first two-position four-way wireless solenoid valve 16 and the second two-position four-way wireless solenoid valve 17 are energized and operate; The pump 2 is driven by the servo motor 3 to deliver hydraulic oil to the two two-position four-way wireless solenoid valves. The hydraulic oil enters the control cavities of the two hydraulic control check valves through the left-position pressure channel of the second two-position four-way wireless solenoid valve 17, opening the channels of the first hydraulic control check valve 13 and the second hydraulic control check valve 14. Then, the system hydraulic oil passes through the left-position pressure channel of the first two-position four-way wireless solenoid valve and the two hydraulic control check valves into the rodless cavity of the actuating element 1. The actuating element 1 moves upward, and the oil in the rod chamber of the actuating element 1 flows into the inlet of the pump 2 through the oil return passage of the first two-position four-way wireless solenoid valve 16 and then flows into the rodless cavity of the actuating element 1 through the pump 2. The oil volume difference between the rodless cavity and the rod chamber is supplemented by the accumulator 4;

[0093] The actuator 1 moves downward: The resonance frequency of the first energy transmission device 19 is set to be the same as the resonance frequency of the first resonance circuit where the left coil of the second two-position four-way wireless solenoid valve 17 is located, and different from the resonance frequency of the first resonance circuit where the left coil of the first two-position four-way wireless solenoid valve 16 is located. Then, the first energy transmission device 19 will resonate with the valve with the set resonance frequency to transmit electric energy, and the valve with a resonance frequency different from the set value cannot resonate to transmit electric energy. The left position of the second two-position four-way wireless solenoid valve 17 is energized, and the first two-position four-way wireless solenoid valve 16 is de-energized and remains in the right position under the action of the spring force. The pump 2 transports hydraulic oil under the drive of the servo motor 3. The hydraulic oil enters the control chambers of the first pilot-operated check valve 13 and the second pilot-operated check valve 14 through the left-position pressure oil passage of the second two-position four-way wireless solenoid valve 17, opening the hydraulic flow passages of the two check valves. The hydraulic oil enters the rod chamber of the actuator 1 through the right-position pressure passage of the first two-position four-way wireless solenoid valve 16, the first pilot-operated check valve 13, and the second pilot-operated check valve 14. The actuator 1 moves downward. The oil in the rodless chamber of the actuator 1 flows into the inlet of the pump 2 through the oil return passage of the first two-position four-way wireless solenoid valve 16, flows into the rod chamber of the actuator 1 through the pump 2, and the excess oil in the rodless chamber flows into the accumulator 4 through the first pilot-operated check valve 13 and the second pilot-operated check valve 14. The two pilot-operated check valves can control the speed of the actuator during downward movement without losing control.

[0094] The actuator 1 stops moving: The resonance frequency of the first energy transmission device 19 is set to be different from the resonance frequency of the first resonance circuit in the second two-position four-way wireless solenoid valve 17. The second two-position four-way wireless solenoid valve 17 is de-energized and stops working. The second two-position four-way wireless solenoid valve 17 remains in the right position under the action of the spring force. The first pilot-operated check valve 13 and the second pilot-operated check valve 14 are depressurized and closed, sealing the oil volumes in the rodless chamber and the rod chamber of the actuator 1. The position of the actuator 1 is maintained and the action stops.

[0095] Embodiment 9

[0096] Based on Embodiment 5 or Embodiment 6, as Figure 12 shown, when the wireless solenoid valve 100 includes a wireless proportional direction valve 18 and a wireless proportional pressure reducing valve 21, magnetic field resonance is carried out through the first energy transmission device to obtain electric energy transmission and be charged. Furthermore, the wireless charging current is adjusted through the wireless charging current adjustment technology, so that the opening degrees of the spools of the wireless proportional direction valve and the wireless proportional pressure reducing valve can be adjusted, realizing the control of the flow rate and pressure of the actuator.

[0097] The actuator 1 lifts the load 12 upward: Set the resonance frequency of the first energy transmission device 19 to be the same as the resonance frequency of the first resonance capacitor 5 connected to the wireless proportional direction valve 18 and the wireless proportional pressure reducing valve 21. When the control current of the wireless proportional direction valve 18 is between 4 mA and 12 mA, the spool of the wireless proportional direction valve 18 moves to the left position. The pump 2 delivers hydraulic oil under the drive of the servo motor 3. The hydraulic oil passes through the wireless proportional pressure reducing valve 21, the pressure oil passage of the left position of the wireless proportional direction valve 18, and the first hydraulic control check valve 13 and enters the rodless cavity of the actuator 1. The actuator 1 moves upward. The oil in the rod cavity of the actuator 1 flows into the inlet of the pump 2 through the oil return passage of the left position of the wireless proportional direction valve 18, and then flows into the rodless cavity of the actuator 1 through the pump 2. The oil quantity difference between the rodless cavity and the rod cavity is supplemented by the accumulator 4. By adjusting the current of the wireless proportional pressure reducing valve, different output pressures can be obtained.

[0098] The actuator 1 moves downward: Set the resonance frequency of the first energy transmission device 19 to be the same as the resonance frequency of the first resonance capacitor 5 connected to the wireless proportional direction valve 18 and the wireless proportional pressure reducing valve 21 to generate resonance and transmit electric energy. Adjust the wireless charging current through the wireless charging current adjustment technology. When the control current of the wireless proportional direction valve 18 is between 12 mA and 20 mA, the spool of the wireless proportional direction valve 18 moves to the right position. The pump 2 delivers hydraulic oil under the drive of the servo motor 3. The hydraulic oil passes through the wireless proportional pressure reducing valve 21, the pressure oil passage of the right position of the wireless proportional direction valve 18, and the first hydraulic control check valve 13 and enters the rod cavity of the actuator 1. The actuator 1 moves downward. The oil in the rodless cavity of the actuator 1 flows into the inlet of the pump 2 through the oil return passage of the right position of the wireless proportional direction valve 18, and then flows into the rod cavity of the actuator 1 through the pump 2. The excess oil in the rodless cavity flows into the accumulator 4 through the first hydraulic control check valve 13. The first hydraulic control check valve 13 can control the speed of the actuator 1 from getting out of control when it moves downward. By adjusting the current of the wireless proportional pressure reducing valve, different output pressures can be obtained.

[0099] The actuator 1 stops operating: Set the resonance frequency of the first energy transmission device 19 to be different from the resonance frequency of the first resonance capacitor 5 integrated in the wireless proportional direction valve 18 and the wireless proportional pressure reducing valve 21. The wireless proportional direction valve 18 and the wireless proportional pressure reducing valve 21 lose power and stop working, and the wireless proportional direction valve 18 and the wireless proportional pressure reducing valve 21 remain in the middle position. The first hydraulic control check valve 13 loses pressure and closes to seal the oil quantity in the rodless cavity of the actuator 1. The position of the actuator 1 is maintained and it stops operating.

[0100] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "left", "right", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0101] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0102] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0104] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0105] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A wireless hydraulic control system, characterized in that, It includes a wireless hydraulic actuator assembly, and also includes a first energy transmission device, or also includes a first energy transmission device and a second energy transmission device; The wireless hydraulic actuator assembly includes an actuator, a pump, a servo motor, a wireless solenoid valve group, and an accumulator. The wireless solenoid valve group includes wireless solenoid valves. The servo motor is drivingly connected to the pump. The pump is connected to the actuator through the wireless solenoid valve. An accumulator is provided between the wireless solenoid valve and the rodless chamber of the actuator; A first resonant capacitor is integrated in the wireless solenoid valve to form a first resonant circuit; or, a first resonant capacitor is integrated in the wireless solenoid valve to form a first resonant circuit and a second resonant capacitor is integrated in the servo motor to form a second resonant circuit; When the resonant frequency of the first energy transmission device is consistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve is energized to operate; when the resonant frequency of the first energy transmission device is inconsistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve is de-energized and stops working; When the resonant frequency of the second energy transmission device is consistent with the resonant frequency of the second resonant circuit, the servo motor is energized to operate; when the resonant frequency of the second energy transmission device is inconsistent with the resonant frequency of the second resonant circuit, the servo motor is de-energized and stops working.

2. The wireless hydraulic control system according to claim 1, characterized in that A first rectifier, a first filter, and a Bluetooth module are also integrated in the wireless solenoid valve; A second rectifier and a second filter are also integrated in the servo motor.

3. The wireless hydraulic control system according to claim 2, characterized in that The pump, the servo motor, the wireless solenoid valve group, and the accumulator are all integrated on the actuator. The wireless solenoid valve group is respectively connected to the inlet and outlet of the pump through an internal hydraulic flow channel. The wireless solenoid valve group is also respectively connected to the rodless chamber and the rod chamber of the actuator through an internal hydraulic flow channel; The accumulator is integrated in the wireless solenoid valve group and is connected to the internal hydraulic flow channel where the rodless chamber is located through a liquid supplement flow channel.

4. The wireless hydraulic control system according to claim 3, characterized in that, The wireless solenoid valve is a three-position four-way wireless solenoid valve. A first hydraulic control check valve is provided on the internal hydraulic flow channel between the accumulator and the rodless chamber. The internal hydraulic flow channel where the rod chamber is located is connected to the first hydraulic control check valve through a one-way valve hydraulic flow channel.

5. The wireless hydraulic control system according to claim 3, wherein The wireless solenoid valve is a first two-position four-way wireless solenoid valve, and a second two-position four-way wireless solenoid valve is also integrated in the wireless solenoid valve group; A first hydraulic control check valve is provided on the internal hydraulic flow channel where the rodless chamber is located. A second hydraulic control check valve is provided on the internal hydraulic flow channel where the rod chamber is located. A one-way valve hydraulic flow channel that is respectively connected to the first hydraulic control check valve and the second hydraulic control check valve is also provided in the wireless solenoid valve group; The second two-position four-way wireless solenoid valve is respectively connected to the inlet, outlet of the pump, and the one-way valve hydraulic flow channel.

6. The wireless hydraulic control system according to claim 3, wherein The wireless solenoid valve includes a wireless proportional direction valve and a wireless proportional pressure reducing valve. A first hydraulic control check valve is provided on the internal hydraulic flow channel where the rodless chamber is located. The internal hydraulic flow channel where the rod chamber is located is connected to the first hydraulic control check valve through a one-way valve hydraulic flow channel.

7. The wireless hydraulic control system according to claim 1, characterized in that When the wireless solenoid valve is a three-position four-way wireless solenoid valve, The actuator lifts the load upward: Set the resonance frequency of the first energy transmission device to be consistent with the resonance frequency of the first resonance circuit where the left coil of the three-position four-way wireless solenoid valve is located. The left position of the three-position four-way wireless solenoid valve is energized and actuates. The pump, driven by the servo motor, delivers hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve is located. The hydraulic oil enters the rodless cavity of the actuator through the three-position four-way wireless solenoid valve and the first pilot-operated check valve. The actuator moves upward. The oil in the rod chamber of the actuator flows into the inlet of the pump through the oil return passage of the three-position four-way wireless solenoid valve, and then flows into the rodless cavity of the actuator through the pump. The oil quantity difference between the rodless cavity and the rod chamber is replenished by the accumulator. The actuator moves downward: Set the resonance frequency of the first energy transmission device to be consistent with the resonance frequency of the first resonance circuit where the right coil of the three-position four-way wireless solenoid valve is located. The right position of the three-position four-way wireless solenoid valve is energized and actuates. The pump, driven by the servo motor, delivers hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve is located. The hydraulic oil enters the rod chamber of the actuator through the three-position four-way wireless solenoid valve. The actuator moves downward. The oil in the rodless cavity of the actuator flows into the inlet of the pump through the oil return passage of the three-position four-way wireless solenoid valve, and then flows into the rod chamber of the actuator through the pump. The excess oil in the rodless cavity flows into the accumulator. The actuator stops operating: Set the resonance frequency of the first energy transmission device to be inconsistent with the resonance frequency of the first resonance circuit inside the three-position four-way wireless solenoid valve. The three-position four-way wireless solenoid valve loses power and stops working, and the three-position four-way wireless solenoid valve maintains the middle position. The first pilot-operated check valve loses pressure and closes, sealing the oil quantity in the rodless cavity of the actuator, and the position of the actuator is maintained.

8. The wireless hydraulic control system according to claim 1, wherein When the wireless solenoid valve is the first two-position four-way wireless solenoid valve, a second two-position four-way wireless solenoid valve is also integrated in the wireless solenoid valve group. At this time, The actuator lifts the load upward: Set the resonance frequency of the first energy transmission device to be consistent with the resonance frequency of the first resonance circuit where the left coils of the first two-position four-way wireless solenoid valve and the second two-position four-way wireless solenoid valve are located. The left positions of the first two-position four-way wireless solenoid valve and the second two-position four-way wireless solenoid valve are energized and actuated. The pump, driven by the servo motor, delivers hydraulic oil to the two two-position four-way wireless solenoid valves. The hydraulic oil enters the control cavities of the two pilot-operated check valves through the left-position pressure passage of the second two-position four-way wireless solenoid valve, opening the passages of the first pilot-operated check valve and the second pilot-operated check valve. Then, the system hydraulic oil enters the rodless cavity of the actuator through the left-position pressure passage of the first two-position four-way wireless solenoid valve and the two pilot-operated check valves. The actuator moves upward. The oil in the rod chamber of the actuator flows into the inlet of the pump through the oil return passage of the first two-position four-way wireless solenoid valve, and then flows into the rodless cavity of the actuator through the pump. The oil quantity difference between the rodless cavity and the rod chamber is replenished by the accumulator. The actuating element moves downward: The resonance frequency of the first energy transmitting device is set to be the same as the resonance frequency of the first resonance circuit where the left coil of the second two-position four-way wireless solenoid valve is located, and is different from the resonance frequency of the first resonance circuit where the left coil of the first two-position four-way wireless solenoid valve is located. The left position of the second two-position four-way wireless solenoid valve is energized, and the first two-position four-way wireless solenoid valve is de-energized and maintains the right position. The pump delivers hydraulic oil under the drive of the servo motor. The hydraulic oil enters the control chambers of the first pilot-operated check valve and the second pilot-operated check valve through the left-position pressure oil passage of the second two-position four-way wireless solenoid valve, opening the one-way valve hydraulic flow passage. The hydraulic oil passes through the right-position pressure passage of the first two-position four-way wireless solenoid valve, the first pilot-operated check valve and the second pilot-operated check valve and enters the rod chamber of the actuating element. The actuating element moves downward. The oil in the rodless chamber of the actuating element flows into the inlet of the pump through the oil return passage of the first two-position four-way wireless solenoid valve, flows through the pump and into the rod chamber of the actuating element. The excess oil in the rodless chamber flows into the accumulator through the first pilot-operated check valve and the second pilot-operated check valve; The actuating element stops moving: The resonance frequency of the first energy transmitting device is set to be different from the resonance frequency of the first resonance circuit inside the second two-position four-way wireless solenoid valve. The second two-position four-way wireless solenoid valve is de-energized and stops working. The second two-position four-way wireless solenoid valve maintains the right position. The first pilot-operated check valve and the second pilot-operated check valve are depressurized and closed, sealing the oil volumes in the rodless chamber and the rod chamber of the actuating element, and the position of the actuating element is maintained.

9. The wireless hydraulic control system according to claim 1, characterized in that When the wireless solenoid valve includes a wireless proportional direction valve and a wireless proportional pressure reducing valve, The actuating element lifts the load upward: The resonance frequency of the first energy transmitting device is set to be the same as the resonance frequency of the first resonance capacitor connected to the wireless proportional direction valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional direction valve is between 4 and 12 mA, the spool of the wireless proportional direction valve moves to the left position. The pump delivers hydraulic oil under the drive of the servo motor. The hydraulic oil passes through the wireless proportional pressure reducing valve, the left-position pressure oil passage of the wireless proportional direction valve, and the first pilot-operated check valve and enters the rodless chamber of the actuating element. The actuating element moves upward. The oil in the rod chamber of the actuating element flows into the inlet of the pump through the left-position oil return passage of the wireless proportional direction valve, flows through the pump and into the rodless chamber of the actuating element. The oil volume difference between the rodless chamber and the rod chamber is supplemented by the accumulator; The actuating element moves downward: The resonance frequency of the first energy transmitting device is set to be the same as the resonance frequency of the first resonance capacitor connected to the wireless proportional direction valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional direction valve is between 12 and 20 mA, the spool of the wireless proportional direction valve moves to the right position. The pump delivers hydraulic oil under the drive of the servo motor. The hydraulic oil passes through the wireless proportional pressure reducing valve, the right-position pressure oil passage of the wireless proportional direction valve, and the first pilot-operated check valve and enters the rod chamber of the actuating element. The actuating element moves downward. The oil in the rodless chamber of the actuating element flows into the inlet of the pump through the right-position oil return passage of the wireless proportional direction valve, then flows through the pump and into the rod chamber of the actuating element. The excess oil in the rodless chamber flows into the accumulator through the first pilot-operated check valve; The actuating element stops operating: The resonant frequency of the first energy transmitting device is set to be inconsistent with the resonant frequencies of the first resonant capacitors integrated in the wireless proportional direction valve and the wireless proportional pressure reducing valve. The wireless proportional direction valve and the wireless proportional pressure reducing valve lose power and stop working, and the wireless proportional direction valve and the wireless proportional pressure reducing valve maintain the neutral position. The first hydraulic check valve loses pressure and closes, sealing the oil volume in the rodless chamber of the actuating element, and the position of the actuating element is maintained.

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