Wireless hydraulic execution assembly and wireless hydraulic control system

Abstract

The invention relates to a wireless hydraulic execution assembly and a wireless hydraulic control system.The wireless hydraulic execution assembly comprises an execution element, a pump, a servo motor, a wireless electromagnetic valve and an energy accumulator, the servo motor is in transmission connection with the pump, and the pump is connected with the execution element through the wireless electromagnetic valve; an energy accumulator is arranged between the wireless electromagnetic valve and a rodless cavity of the execution element; a first resonant capacitor is integrated in the wireless electromagnetic valve; or, a first resonant capacitor is integrated in the wireless electromagnetic valve, and a second resonant capacitor is integrated in the servo motor. According to the wireless hydraulic execution assembly, the wireless electromagnetic valve is arranged, the first resonant capacitor and the second resonant capacitor are utilized, and wireless charging can be achieved through magnetic field resonance; a wireless hydraulic execution assembly without a comprehensive hydraulic power station, a hydraulic pipeline and a cable can be integrated by utilizing an execution element self-circulation power integration technology, a wireless electromagnetic valve and other products.

Description

Technical Field

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

[0002] The hydraulic transmission system is a type of transmission device. It is based on the Pascal principle of fluid mechanics and uses liquid as the working medium for energy transmission and control. It is widely used in oil fields and other industries due to its high power density, fast response, stepless speed regulation, and easy remote control. It is mainly composed of four parts: power source, actuator, control part, and auxiliary part. The power source includes hydraulic pump and prime mover (motor, engine), and its function is to convert mechanical energy into hydraulic energy; the actuator includes hydraulic cylinder and hydraulic motor, and its function is to convert hydraulic energy into mechanical energy for driving load; the control part includes pressure, flow, and directional control valves to realize the control of actuator force, speed and direction; the auxiliary part includes oil tank, hydraulic accessories, hydraulic pipelines, etc., which connect various parts and provide oil source.

[0003] The traditional hydraulic control system design is that multiple actuators share a large integrated power station. The wiring method is that the power station, control valve group, and actuators are separated, and the middle is connected by hydraulic pipelines for power transmission. At present, hydraulic solenoid control valves are all actively connected to realize power and signal transmission. The electronic control system is connected to various parts of the hydraulic system through cables to realize motion control. This traditional wired hydraulic control system has a large number of cables when controlling multiple actuators, which will cause a large amount of wiring work and occupy a large area, increase system leakage and pressure loss, thereby reducing system efficiency, causing great personal danger due to hose explosion, high cost, and heavy burden of later maintenance.

[0004] At present, most mechanical equipment at oil sites are driven by traditional wired hydraulic systems with numerous actuators. Due to the drawbacks of traditional wired hydraulic systems, it is inevitable that the cost investment in oil equipment and the burden of on-site installation, commissioning, and maintenance will increase.

[0005] In response to the traditional hydraulic system technical solution described above, "multiple actuators share a large integrated power station, the wiring method is to separate the power station, control valve group, and actuators, and use hydraulic pipelines to connect them for power transmission", the domestic and foreign hydraulic industry markets already have actuator actuators, which integrate the hydraulic station and the actuators together, and consist of an oil tank, a hydraulic pump, and a hydraulic valve actuator. The actuator itself is an independent power unit. Existing problems: There is still a wired connection between the hydraulic solenoid valve and the electronic control system, and between the hydraulic valve group and the actuator. The representative manufacturer name and product name are Rexroth electric drive hydraulic actuators.

[0006] In response to the above description, "hydraulic solenoid control valves are all actively connected to achieve power and signal transmission. The electronic control system is connected to various parts of the hydraulic system through cables to achieve motion control. When controlling multiple actuators, there are many cables, which will cause a large amount of wiring work and increase the burden of on-site installation, debugging, and maintenance." The foreign solutions for components such as active solenoid valves and active sensors are: For the active connection problem of traditional hydraulic valves, the solution is to integrate a self-generating device in each actuator hydraulic module, and solve the problem of remote active power supply of the solenoid valve through internal active connection; solve the problem of remote communication through Bluetooth wireless plugs. 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 publication number is US11909206B2, and the patent name is an invention patent for hydraulic systems and components including wireless control technology.

[0007] In addition, the invention patent with the patent publication number CN 109538262 A discloses a wirelessly powered mining electromagnetic pilot valve, which completely abandons the existing mining electromagnetic pilot valve drive method of using a cable connector to connect through a waterproof plug, and adopts a wireless power supply method to solve the problem of inconvenient pin connection during installation. By sealing the wireless power supply part with glue, the protection performance is better, and the problem of coal ash and sewage flowing into the socket during the later maintenance of the electromagnetic pilot valve, resulting in poor contact, and the increase in the workload of plugging at the plug and socket, is solved. However, this patent still cannot solve the problem of wireless connection and control of the entire hydraulic system. Summary of the invention

[0008] In order to solve one or more technical problems existing in the prior art, the present invention provides a wireless hydraulic actuator and a wireless hydraulic control system.

[0009] The technical solution of the present invention to solve the above technical problems is as follows: a wireless hydraulic actuator assembly, comprising an actuator, a pump, a servo motor, a wireless solenoid valve group and an accumulator, wherein the wireless solenoid valve group comprises a wireless solenoid valve, the servo motor is drivingly connected to the pump, the pump is connected to the actuator through the wireless solenoid valve, and an accumulator is arranged between the wireless solenoid valve and the rodless chamber of the actuator;

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

[0011] The beneficial effects of the present invention are as follows: the wireless hydraulic actuator of the present invention can realize wireless charging through magnetic field resonance by setting a wireless solenoid valve and utilizing the first resonant capacitor and the second resonant capacitor. The self-circulating power integration technology of the actuator and products such as wireless solenoid valves can be utilized to integrate a wireless hydraulic actuator without an integrated hydraulic power station, hydraulic pipelines and cables. There is no need for an integrated power station, large quantities of hydraulic pipelines and cables on site. The wireless hydraulic actuator itself, as a complete independent module of the hydraulic system, replaces the traditional actuator on the device and is controlled by the control system to realize the working condition requirements according to the process flow.

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

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

[0014] The servo motor also integrates a second rectifier and a second filter, and the second resonant capacitor is arranged in series with the coil of the servo motor.

[0015] The beneficial effect of adopting the above further solution is that by setting up a rectifier and a filter, the anti-interference ability and transmission efficiency can be improved, and the malfunction of the wireless solenoid valve and the servo motor can be avoided. The setting of the Bluetooth module can realize signal transmission.

[0016] Furthermore, the pump, servo motor, wireless solenoid valve group and accumulator are all integrated on the actuator, the wireless solenoid valve group is connected to the inlet and outlet of the pump respectively through the built-in hydraulic channel, and the wireless solenoid valve group is also connected to the rodless chamber and rod chamber of the actuator respectively through the built-in hydraulic channel; the accumulator is integrated in the wireless solenoid valve group and is connected to the built-in hydraulic channel where the rodless chamber is located through the fluid replenishment channel.

[0017] The beneficial effect of adopting the above further solution is: all components are integrated on the actuator, so that the entire wireless hydraulic actuator assembly acts as an independent entity, which is convenient for use and replacement, and is convenient for replacing the traditional separated wired hydraulic system as an independent functional module.

[0018] Furthermore, the wireless solenoid valve is a three-position four-way wireless solenoid valve, and a first hydraulically controlled one-way valve is provided on the built-in hydraulic channel between the accumulator and the rodless chamber, and the built-in hydraulic channel where the rod chamber is located is connected to the first hydraulically controlled one-way valve through the one-way valve hydraulic channel.

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

[0020] A first hydraulically controlled one-way valve is provided on the built-in hydraulic channel where the rodless chamber is located, and a second hydraulically controlled one-way valve is provided on the built-in hydraulic channel where the rod chamber is located. The wireless solenoid valve group is also provided with a one-way valve hydraulic channel which is respectively connected to the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve; a second two-position four-way wireless solenoid valve is respectively connected to the inlet, outlet and one-way valve hydraulic channel of the pump.

[0021] Furthermore, the wireless solenoid valve includes a wireless proportional directional valve and a wireless proportional pressure reducing valve. A first hydraulically controlled one-way valve is provided on the built-in hydraulic channel where the rodless chamber is located. The built-in hydraulic channel where the rod chamber is located is connected to the first hydraulically controlled one-way valve through the one-way valve hydraulic channel.

[0022] A wireless hydraulic control system, comprising the wireless hydraulic actuator assembly described above, and further comprising a first energy transmitting device, or further comprising the first energy transmitting device and a second energy transmitting device;

[0023] When the resonant frequency of the first energy transmitting device is consistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve is powered on and operates; when the resonant frequency of the first energy transmitting device is inconsistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve loses power and stops working;

[0024] When the resonant frequency of the second energy sending device is consistent with the resonant frequency of the second resonant circuit, the servo motor is powered on and starts; when the resonant frequency of the second energy sending device is inconsistent with the resonant frequency of the second resonant circuit, the servo motor loses power 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 oil consumption by 75%. It can realize the on-site absence of integrated hydraulic power station, hydraulic pipeline and large-volume cables. It itself replaces the traditional actuator on the device as a complete hydraulic system functional module. The control system controls the wireless solenoid valve to achieve the working condition requirements according to the process flow, which greatly reduces the on-site construction workload and construction cycle, reduces the area occupied by the hydraulic system, and reduces the equipment installation, commissioning, maintenance burden and cost. At the same time, due to the reduced energy consumption and the absence of cables, the cost investment of the drilling rig hydraulic system is also greatly reduced, which can achieve cost reduction and efficiency improvement. Taking a single set of oil drilling rigs in service on site as an example, the application of the wireless hydraulic system can save costs of about 9 million yuan.

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

[0027] The actuator lifts the load upward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant 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 electrically 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, and the hydraulic oil enters the rodless cavity of the actuator through the three-position four-way wireless solenoid valve and the first hydraulically controlled one-way valve, and the actuator moves upward, and the oil in the rod cavity of the actuator flows into the inlet of the pump through the oil return channel of the three-position four-way wireless solenoid valve, and then flows into the rodless cavity of the actuator through the pump, and the oil volume difference between the rodless cavity and the rod cavity is replenished through the accumulator;

[0028] The actuator moves downward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant 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 electrically 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, and the hydraulic oil enters the rod chamber of the actuator through the three-position four-way wireless solenoid valve, and the actuator moves downward, and the oil in the rodless chamber of the actuator flows into the inlet of the pump through the oil return channel of the three-position four-way wireless solenoid valve, and then flows into the rod chamber of the actuator through the pump, and the excess oil in the rodless chamber flows into the accumulator;

[0029] The actuator stops moving: the resonant frequency of the first energy sending device is set to be inconsistent with the resonant frequency of the first resonant circuit in 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 hydraulically controlled one-way valve loses pressure and closes, sealing the oil volume in the rodless chamber of the actuator, and the position of the actuator is maintained.

[0030] Furthermore, when the wireless solenoid valve is a 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.

[0031] The actuator lifts the load upward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant circuit where the first two-position four-way wireless solenoid valve and the left coil of the second two-position four-way wireless solenoid valve are located, and the first two-position four-way wireless solenoid valve and the second two-position four-way wireless solenoid valve are electrically actuated at the left position; the pump, driven by the servo motor, delivers hydraulic oil to the two two-position four-way wireless solenoid valves, and the hydraulic oil enters the control chambers of the two hydraulically controlled one-way valves through the left-position pressure channel of the second two-position four-way wireless solenoid valve, and the channels of the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve are opened, then the system hydraulic oil enters the rodless chamber of the actuator through the left-position pressure channel of the first two-position four-way wireless solenoid valve and the two hydraulically controlled one-way valves, the actuator moves upward, and the oil in the rod chamber of the actuator flows into the inlet of the pump through the return oil flow channel of the first two-position four-way wireless solenoid valve, and then flows into the rodless chamber of the actuator through the pump, and the oil volume difference between the rodless chamber and the rod chamber is replenished through the accumulator;

[0032] The actuator moves downward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant circuit where the left coil of the second two-position four-way wireless solenoid valve is located, and inconsistent with the resonant frequency of the first resonant circuit where the left coil of the first two-position four-way wireless solenoid valve is located, the second two-position four-way wireless solenoid valve is energized in the left position, 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, and the hydraulic oil enters the control chamber of the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve through the left-position pressure oil channel of the second two-position four-way wireless solenoid valve, and the hydraulic flow channel of the one-way valve is opened, and the hydraulic oil enters the rod chamber of the actuator through the right-position pressure channel of the first two-position four-way wireless solenoid valve, the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve, and the actuator moves downward, and the oil in the rodless chamber of the actuator flows into the inlet of the pump through the oil return channel of the first two-position four-way wireless solenoid valve, and flows into the rod chamber of the actuator through the pump, and the excess oil in the rodless chamber flows into the accumulator through the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve;

[0033] The actuator stops moving: the resonant frequency of the first energy sending device is set to be inconsistent with the resonant frequency of the first resonant circuit in the second two-position four-way wireless solenoid valve, the second two-position four-way wireless solenoid valve loses power and stops working, the second two-position four-way wireless solenoid valve remains in the right position, the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve lose pressure and close, the oil volume in the rodless chamber and the rod chamber of the actuator is sealed, and the position of the actuator is maintained.

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

[0035] The actuator lifts the load upward: the resonant frequency of the first energy sending device is set to be consistent with the resonant frequency of the first resonant capacitor connected to the wireless proportional directional valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional directional valve is 4-12 mA, the valve core of the wireless proportional directional valve moves to the left position, and 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 pressure oil channel of the wireless proportional directional valve, and the first hydraulically controlled one-way valve into the rodless chamber of the actuator. The actuator moves upward, and the oil in the rod chamber of the actuator flows into the inlet of the pump through the left return oil channel of the wireless proportional directional valve, and flows into the rodless chamber of the actuator through the pump. The oil volume difference between the rodless chamber and the rod chamber is replenished through the accumulator;

[0036] The actuator moves downward: the resonant frequency of the first energy sending device is set to be consistent with the resonant frequency of the first resonant capacitor connected to the wireless proportional directional valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional directional valve is between 12 and 20 mA, the valve core of the wireless proportional directional valve moves to the right position, and 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 channel of the wireless proportional directional valve, and the first hydraulically controlled one-way valve into the rod chamber of the actuator. The actuator moves downward, and the oil in the rodless chamber of the actuator flows into the inlet of the pump through the right-position return oil channel of the wireless proportional directional valve, and then flows into the rod chamber of the actuator through the pump. The excess oil in the rodless chamber flows into the accumulator through the first hydraulically controlled one-way valve.

[0037] The actuator stops moving: the resonant frequency of the first energy sending device is set to be inconsistent with the resonant frequency of the first resonant capacitor integrated in the wireless proportional directional valve and the wireless proportional pressure reducing valve, the wireless proportional directional valve and the wireless proportional pressure reducing valve lose power and stop working, and the wireless proportional directional valve and the wireless proportional pressure reducing valve remain in the middle position; the first hydraulically controlled one-way valve loses pressure and closes, sealing the oil volume in the rodless chamber of the actuator, and the position of the actuator is maintained. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0043] Figure 6It is a structural schematic diagram of the wireless solenoid valve of the present invention;

[0044] Figure 7 It is a structural schematic diagram of the wireless motor of the present invention;

[0045] Figure 8 It is a structural schematic diagram of the wireless hydraulic actuator of the present invention;

[0046] Fig. 9 It is a structural schematic diagram of the wireless hydraulic execution system of the present invention;

[0047] Fig.10 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0048] Fig.11 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0049] Fig.12 This is a structural principle diagram of embodiment 3 of the present invention.

[0050] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

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

[0052] 200, wireless motor; 201, junction box; 300, wireless hydraulic actuator; 400, charging platform; 500, electronic 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 hydraulically controlled one-way valve; 14. Second hydraulically controlled one-way 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 directional valve; 19. First energy transmitting device; 20. Second energy transmitting device; 21. Wireless proportional pressure reducing valve. DETAILED DESCRIPTION

[0054] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0055] Example 1

[0056] like Figure 1 , Figure 4 , Figure 6 , Figure 8 and Fig. 9As 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 group 600 and an accumulator 4, wherein the wireless solenoid valve group 600 includes a wireless solenoid valve 100, the servo motor 3 is connected to the pump 2 by transmission, the pump 2 is connected to the actuator 1 through the wireless solenoid valve 100, and an accumulator 4 is provided between the wireless solenoid valve 100 and the rodless cavity of the actuator 1; the wireless solenoid valve 100 is integrated with a first resonant capacitor 5 to form a first resonant circuit. The actuator 1 can be a hydraulic cylinder.

[0057] like Figure 1 As shown, the wireless solenoid valve 100 of this embodiment is also integrated with a first rectifier 7, a first filter 8 and a Bluetooth module 9; in order to realize the resonant transmission of electric energy, there are many ways to integrate the first resonant capacitor 5, such as connecting it in series with the coil, etc. Each solenoid valve coil 103 of the wireless solenoid valve 100 is connected in series with a first resonant capacitor 5; there are also many ways to integrate the first rectifier 7, the first filter 8 and the Bluetooth module 9, which can be connected in series and parallel to meet the requirements of rectification, filtering and signal transmission. By setting up a rectifier and a filter, the anti-interference ability and transmission efficiency can be improved, and the wireless solenoid valve can be prevented from malfunctioning. The setting of the Bluetooth module can realize signal transmission.

[0058] Specifically, the wireless solenoid valve group 600 includes a valve body 101, a valve core 102, an electromagnet 104 and a built-in hydraulic flow channel 105. The specific structural setting can be set to different solenoid valves according to different needs; 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, the solenoid valves that do not work at the same time can be set to different frequencies. When the selected solenoid valve needs to work, it is only necessary to make the resonant frequency of the energy sending device or charging platform 400 set in the non-explosion-proof area or other positions consistent with the resonant frequency of the selected solenoid valve to work, and the energy space transfer can be achieved through magnetic field resonance, and the solenoid valve is electrically operated. For example, the operating frequency of a single solenoid valve is 26W, and the magnetic field resonance can transmit several kilowatts, which can meet the simultaneous operation of multiple solenoid valves and frequent reversing. The magnetic field resonance transmission distance can reach tens of meters, and it can continue to grow with technological progress. Installing a Bluetooth receiver and an interrogator in the wireless solenoid valve as a Bluetooth module can complete signal transmission.

[0059] like Figure 3 , Figure 8-Figure 9As shown, 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 channel 105. The wireless solenoid valve group 600 is also respectively connected to the rodless cavity and the rod cavity of the actuator 1 through the built-in hydraulic channel 105. The accumulator 4 is integrated in the wireless solenoid valve group 600 and is connected to the built-in hydraulic channel 105 where the rodless cavity is located through the liquid replenishment channel. All components are integrated on the actuator, so that the entire wireless hydraulic actuator assembly is an independent whole, which is convenient for use and replacement, etc., and is convenient to replace the traditional separated wired hydraulic system as an independent functional module.

[0060] The servo motor 3 in this embodiment can be a common motor with a cable, and the entire wireless hydraulic actuator assembly has only one power cable.

[0061] like Fig.10 As shown, the wireless solenoid valve 100 of this embodiment is a three-position four-way wireless solenoid valve 15, and a first hydraulically controlled one-way valve 13 is provided on the built-in hydraulic channel 105 between the accumulator 4 and the rodless chamber, and the built-in hydraulic channel 105 where the rod chamber is located is connected to the first hydraulically controlled one-way valve 13 through a one-way valve hydraulic channel.

[0062] The wireless hydraulic actuator assembly of this embodiment is highly integrated between components. A highly integrated solution is adopted to transform the external hydraulic pipeline into the built-in hydraulic flow channel of the valve block, and to supply oil on demand by controlling the speed of the pump, and to use the principle of oil self-circulation to replenish the return oil of the actuator to the accumulator and the actuator. In this way, the accumulator and the actuator itself can be designed as a power source according to the single volume at the maximum stroke of the actuator, and finally a wireless hydraulic system without cables, low oil volume, and low energy consumption can be realized, and the actuator action can be completed through the control system. The self-circulation of oil and the leakage repair of the accumulator ensure that the actuator has sufficient oil volume for operation. Based on the Pascal principle, the pressure-stabilized transmission can be guaranteed under the control of the pressure valve, and the integrated components can be adjusted according to the specifications of the actuator to limit the installation volume.

[0063] The wireless hydraulic actuator of the present embodiment can realize wireless charging through magnetic field resonance by setting a wireless solenoid valve and utilizing the first resonant capacitor. It can utilize the actuator self-circulating power integration technology and wireless solenoid valve and other products to integrate a wireless hydraulic actuator without an integrated hydraulic power station, hydraulic pipelines and cables. There is no need for an integrated power station, large quantities of hydraulic pipelines and cables on site. The wireless hydraulic actuator itself, as a complete independent module of the hydraulic system, replaces the traditional actuator on the device and is controlled by the control system to realize the working condition requirements according to the process flow.

[0064] Example 2

[0065] Different from the first embodiment, the wireless solenoid valve 100 of the present embodiment is a first two-position four-way wireless solenoid valve 16, and the wireless solenoid valve assembly 600 further includes a second two-position four-way wireless solenoid valve 17; Fig.11 shown.

[0066] A first hydraulically controlled one-way valve 13 is provided on the built-in hydraulic channel 105 where the rodless chamber is located, and a second hydraulically controlled one-way valve 14 is provided on the built-in hydraulic channel 105 where the rod chamber is located. The wireless solenoid valve group 600 is also provided with a one-way valve hydraulic channel respectively connected to the first hydraulically controlled one-way valve 13 and the second hydraulically controlled one-way valve 14; a second two-position four-way wireless solenoid valve 17 is respectively connected to the inlet, outlet and the one-way valve hydraulic channel of the pump 2.

[0067] Example 3

[0068] Different from the first embodiment, the wireless solenoid valve 100 of the present embodiment includes a wireless proportional directional valve 18 and a wireless proportional pressure reducing valve 21, a first hydraulically controlled one-way valve 13 is provided on the built-in hydraulic flow channel 105 where the rodless chamber is located, and the built-in hydraulic flow channel 105 where the rod chamber is located is connected to the first hydraulically controlled one-way valve 13 through a one-way valve hydraulic flow channel. Fig.12 shown.

[0069] Example 4

[0070] On the basis of any one of the first to third embodiments, the servo motor 3 in the above embodiment may also be replaced by a wireless motor 200 .

[0071] Specific as Figure 2 , Figure 3 , Figure 5 , Figure 7 to Figure 9 As 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, wherein the servo motor 3 is connected to the pump 2 through a transmission, and the pump 2 is connected to the actuator 1 through the wireless solenoid valve 100, and an accumulator 4 is provided between the wireless solenoid valve 100 and the rodless cavity of the actuator 1; the wireless solenoid valve 100 is integrated with a first resonant capacitor 5 to form a first resonant circuit, and the servo motor 3 is integrated with a second resonant capacitor 6 to form a second resonant circuit, and the servo motor 3 can realize wireless charging by integrating the second resonant capacitor 6. The servo motor 3 obtains a wireless motor 200 by having a built-in second resonant capacitor 6.

[0072] like Figure 1 As shown, the wireless solenoid valve 100 of this embodiment further integrates a first rectifier 7, a first filter 8 and a Bluetooth module 9, and each coil of the wireless solenoid valve 100 is connected in series with a first resonant capacitor 5; Figure 2As shown, the servo motor 3 of this embodiment is also integrated with a second rectifier 10 and a second filter 11, and the second resonant capacitor 6 is arranged in series 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 wireless solenoid valve and the servo motor can be prevented from malfunctioning. The setting of the Bluetooth module can realize signal transmission. There are many ways to integrate the second resonant capacitor 6, such as connecting it in series with the coil; there are also many ways to integrate the second rectifier 10 and the second filter 11, which can be connected in series and parallel to meet the 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 at the same time can be set to different frequencies. When the selected servo motor needs to work, it is only necessary to make the resonant frequency of the energy sending device or high-power charging platform 400 set in the non-explosion-proof area or other location consistent with the resonant frequency of the selected servo motor to work, and the energy space transfer can be realized through magnetic field resonance. With the advancement of wireless charging technology, it can meet the work of higher power motors.

[0074] When in use, the resonant frequency can be set to be consistent with the frequency of the second energy transmitting device that cooperates with it, so that electric energy can be transferred through magnetic field resonance and charged.

[0075] Example 5

[0076] This embodiment provides a wireless hydraulic control system, including a wireless hydraulic actuator 300 of any one of Embodiments 1 to 3, and also includes a first energy sending device 19, such as Figure 1 , Figure 3 , Figure 4 As 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 starts to work; 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 loses power and stops working;

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

[0079] Compared with the traditional wired hydraulic system, the wireless hydraulic control system of this embodiment reduces energy consumption by 40% and oil consumption by 75%. It can achieve the on-site absence of integrated hydraulic power station, hydraulic pipeline and large-volume cables. It itself replaces the traditional actuator on the device as a complete hydraulic system functional module. The control system controls the wireless solenoid valve to achieve the working condition requirements according to the process flow, which greatly reduces the on-site construction workload and construction cycle, reduces the area occupied by the hydraulic system, and reduces the equipment installation, commissioning, maintenance burden and cost. At the same time, due to the reduced energy consumption and the absence of cables, the cost investment of the drilling rig hydraulic system is also greatly reduced, which can achieve cost reduction and efficiency improvement. Taking a single set of oil drilling rigs in service on site as an example, the application of the wireless hydraulic system can save about 9 million yuan in costs.

[0080] Example 6

[0081] This embodiment provides a wireless hydraulic control system, including a wireless hydraulic actuator 300 of embodiment 4, and also including a first energy sending device 19 and a second energy sending device 20, such as Figure 1 to Figure 5 As shown; the charging platform 400 may include a first energy transmitting device 19 and a second energy transmitting device 20, that is, the first energy transmitting device 19 and the second energy transmitting device 20 are integrated to realize charging of the wireless solenoid valve 100 and the wireless motor 200. The control of all electrical components can be realized through the electric control system 500.

[0082] 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 starts to work; 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 loses power and stops working;

[0083] When the resonant frequency of the second energy sending device 20 is consistent with the resonant frequency of the second resonant circuit, the servo motor 3 is powered on and starts working; when the resonant frequency of the second energy sending device 20 is inconsistent with the resonant frequency of the second resonant circuit, the servo motor 3 loses power and stops working.

[0084] Compared with the traditional wired hydraulic system, the wireless hydraulic control system of this embodiment reduces energy consumption by 40% and oil consumption by 75%. It can achieve the on-site absence of integrated hydraulic power station, hydraulic pipeline and large-volume cables. It itself replaces the traditional actuator on the device as a complete hydraulic system functional module. The control system controls the wireless solenoid valve to achieve the working condition requirements according to the process flow, which greatly reduces the on-site construction workload and construction cycle, reduces the area occupied by the hydraulic system, and reduces the equipment installation, commissioning, maintenance burden and cost. At the same time, due to the reduced energy consumption and the absence of cables, the cost investment of the drilling rig hydraulic system is also greatly reduced, which can achieve cost reduction and efficiency improvement. Taking a single set of oil drilling rigs in service on site as an example, the application of the wireless hydraulic system can save about 9 million yuan in costs.

[0085] Example 7

[0086] On the basis of Example 5 or Example 6, Fig.10 As 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 undergoes magnetic field resonance through the first energy transmitting device, obtains electrical energy transmission, and is charged.

[0087] The actuator 1 lifts the load 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 coil of the three-position four-way wireless solenoid valve 15 is located, so as to generate resonance and transfer electric energy, and the left position of the three-position four-way wireless solenoid valve 15 is electrically actuated; the pump 2, driven by the servo motor 3, delivers hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve 15 is located, and the hydraulic oil enters the rodless cavity of the actuator 1 through the three-position four-way wireless solenoid valve 15 and the first hydraulically controlled one-way valve 13, and 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 channel of the three-position four-way wireless solenoid valve 15, and then flows into the rodless cavity of the actuator 1 through the pump 2, and the oil volume difference between the rodless cavity and the rod cavity is replenished through the accumulator 4;

[0088] The actuator 1 moves downward: 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 right coil of the three-position four-way wireless solenoid valve 15 is located, generating resonance to transfer electric energy, and the right position of the three-position four-way wireless solenoid valve 15 is electrically actuated; the pump 2, driven by the servo motor 3, delivers hydraulic oil to the hydraulic system where the three-position four-way wireless solenoid valve 15 is located, and 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 return oil flow channel of the three-position four-way wireless solenoid valve 15, 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, and the first hydraulically controlled one-way valve 13 can control the speed of the actuator to prevent it from losing control when it moves downward;

[0089] The actuator 1 stops moving: the resonant frequency of the first energy sending device 19 is set to be inconsistent with the resonant frequency of the first resonant 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 hydraulically controlled one-way valve 13 loses pressure and closes, sealing the oil volume in the rodless chamber of the actuator 1, and the actuator 1 maintains its position and stops moving.

[0090] Example 8

[0091] On the basis of Example 5 or Example 6, Fig.11 As shown, when the wireless solenoid valve 100 is a 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, obtains electrical energy transfer, and is charged.

[0092] The actuator 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 resonant electrical 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, so as to generate resonance and transfer electric energy; the first two-position four-way wireless solenoid valve 16 and the second two-position four-way wireless solenoid valve 17 are electrically actuated in the left position; the pump 2, driven by the servo motor 3, delivers hydraulic oil to the two two-position four-way wireless solenoid valves, and the hydraulic oil passes through the second two-position four-way wireless solenoid valve 17. The left-position pressure channel enters the control chambers of the two hydraulically controlled one-way valves, and the channels of the first hydraulically controlled one-way valve 13 and the second hydraulically controlled one-way valve 14 are opened. 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 hydraulically controlled one-way valves and enters the rodless chamber of the actuator 1. The actuator 1 moves upward, and the oil in the rod chamber of the actuator 1 flows into the inlet of the pump 2 through the return oil flow channel of the first two-position four-way wireless solenoid valve 16, and then flows into the rodless chamber of the actuator 1 through the pump 2. The oil volume difference between the rodless chamber and the rod chamber is replenished through the accumulator 4;

[0093] The actuator 1 moves downward: the resonant frequency of the first energy transmitting device 19 is set to be consistent with the resonant frequency of the first resonant electrical circuit where the left coil of the second two-position four-way wireless solenoid valve 17 is located, and inconsistent with the resonant frequency of the first resonant circuit where the left coil of the first two-position four-way wireless solenoid valve 16 is located. Then the first energy transmitting device 19 will resonate and transfer electric energy with the valve consistent with the set resonant frequency, and the valve inconsistent with the set resonant frequency cannot resonate and transfer electric energy. The second two-position four-way wireless solenoid valve 17 is energized in the left position, 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 delivers hydraulic oil under the drive of the servo motor 3, and the hydraulic oil passes through the second two-position four-way wireless solenoid valve 17. The left pressure oil channel of the wire solenoid valve 17 enters the control chamber of the first hydraulically controlled one-way valve 13 and the second hydraulically controlled one-way valve 14, opening the hydraulic flow channels of the two one-way valves, and the hydraulic oil enters the rod chamber of the actuator 1 through the right pressure channel of the first two-position four-way wireless solenoid valve 16, the first hydraulically controlled one-way valve 13 and the second hydraulically controlled one-way valve 14, and the actuator 1 moves downward, and the oil in the rodless chamber of the actuator 1 flows into the inlet of the pump 2 through the return oil channel of the first two-position four-way wireless solenoid valve 16, and 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 hydraulically controlled one-way valve 13 and the second hydraulically controlled one-way valve 14, and the two hydraulically controlled one-way valves can control the speed of the actuator to prevent it from losing control when it moves downward;

[0094] The actuator 1 stops moving: the resonant frequency of the first energy sending device 19 is set to be inconsistent with the resonant frequency of the first resonant circuit in the second two-position four-way wireless solenoid valve 17, the second two-position four-way wireless solenoid valve 17 loses power and stops working, the second two-position four-way wireless solenoid valve 17 maintains the right position under the action of the spring force, the first hydraulically controlled one-way valve 13 and the second hydraulically controlled one-way valve 14 lose pressure and close, sealing the oil volume in the rodless chamber and the rod chamber of the actuator 1, the actuator 1 maintains its position and stops moving.

[0095] Example 9

[0096] On the basis of Example 5 or Example 6, Fig.12 As shown, when the wireless solenoid valve 100 includes a wireless proportional directional valve 18 and a wireless proportional pressure reducing valve 21, a magnetic field resonance is performed through a first energy transmitting device to obtain electric energy transfer and be charged, and then the wireless charging current is adjusted through the wireless charging current adjustment technology, so that the valve core opening of the wireless proportional directional valve and the wireless proportional pressure reducing valve can be adjusted to achieve flow and pressure control of the actuator.

[0097] The actuator 1 lifts the load 12 upward: the resonant frequency of the first energy sending device 19 is set to be consistent with the resonant frequency of the first resonant capacitor 5 connected to the wireless proportional directional valve 18 and the wireless proportional pressure reducing valve 21. When the control current of the wireless proportional directional valve 18 is 4-12 mA, the valve core of the wireless proportional directional valve 18 moves to the left position, and 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 left pressure oil channel of the wireless proportional directional valve 18, and the first hydraulically controlled one-way valve 13 to enter the rodless cavity of the actuator 1. 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 left return oil channel of the wireless proportional directional valve 18, and flows 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. By adjusting the current of the wireless proportional pressure reducing valve, different output pressures can be obtained;

[0098] The actuator 1 moves downward: the resonant frequency of the first energy sending device 19 is set to be consistent with the resonant frequency of the first resonant capacitor 5 connected to the wireless proportional directional valve 18 and the wireless proportional pressure reducing valve 21, so as to generate resonance to transfer electric energy, and the wireless charging current is adjusted by the wireless charging current adjustment technology. When the control current of the wireless proportional directional valve 18 is between 12 and 20 mA, the valve core of the wireless proportional directional valve 18 moves to the right position, and 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 right-position pressure oil channel of the wireless proportional directional valve 18, and the first hydraulically controlled one-way valve 13 to enter the rod chamber of the actuator 1. The actuator 1 moves downward, and the oil in the rodless chamber of the actuator 1 flows into the inlet of the pump 2 through the right-position return oil channel of the wireless proportional directional valve 18, and then flows into the rod chamber of the actuator 1 through the pump 2. The excess oil in the rodless chamber flows into the accumulator 4 through the first hydraulically controlled one-way valve 13; the first hydraulically controlled one-way valve 13 can control the speed of the actuator 1 to prevent it from losing 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 moving: the resonant frequency of the first energy sending device 19 is set to be inconsistent with the resonant frequency of the first resonant capacitor 5 integrated in the wireless proportional directional valve 18 and the wireless proportional pressure reducing valve 21, the wireless proportional directional valve 18 and the wireless proportional pressure reducing valve 21 lose power and stop working, and the wireless proportional directional valve 18 and the wireless proportional pressure reducing valve 21 remain in the middle position; the first hydraulically controlled one-way valve 13 loses pressure and closes, sealing the oil volume in the rodless chamber of the actuator 1, the actuator 1 maintains its position, and stops moving.

[0100] In the description of the present invention, it is necessary to understand that the terms "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

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

[0102] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, 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 limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

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

[0105] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A wireless hydraulic actuator, characterized in that: It includes an actuator, a pump, a servo motor, a wireless solenoid valve group and an accumulator, wherein the wireless solenoid valve group includes a wireless solenoid valve, the servo motor is drivingly connected to the pump, the pump is connected to the actuator through the wireless solenoid valve, and an accumulator is provided between the wireless solenoid valve and the rodless chamber of the actuator; The wireless solenoid valve is integrated with a first resonant capacitor to form a first resonant circuit; or, the wireless solenoid valve is integrated with a first resonant capacitor to form a first resonant circuit and the servo motor is integrated with a second resonant capacitor to form a second resonant circuit.

2. A wireless hydraulic actuator according to claim 1, characterized in that: The wireless solenoid valve also integrates a first rectifier, a first filter and a Bluetooth module; The servo motor also has a second rectifier and a second filter integrated therein.

3. A wireless hydraulic actuator according to claim 2, characterized in that: The pump, servo motor, wireless solenoid valve group and accumulator are all integrated on the actuator. The wireless solenoid valve group is connected to the inlet and outlet of the pump respectively through the built-in hydraulic channel. The wireless solenoid valve group is also connected to the rodless cavity and the rod cavity of the actuator respectively through the built-in hydraulic channel. The accumulator is integrated in the wireless solenoid valve group and is connected to the built-in hydraulic channel where the rodless cavity is located through the fluid replenishment channel.

4. A wireless hydraulic actuator according to claim 3, characterized in that: The wireless solenoid valve is a three-position four-way wireless solenoid valve. A first hydraulically controlled one-way valve is provided on the built-in hydraulic channel between the accumulator and the rodless chamber. The built-in hydraulic channel where the rod chamber is located is connected to the first hydraulically controlled one-way valve through the one-way valve hydraulic channel.

5. A wireless hydraulic actuator according to claim 3, characterized in that: 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 hydraulically controlled one-way valve is provided on the built-in hydraulic channel where the rodless chamber is located, and a second hydraulically controlled one-way valve is provided on the built-in hydraulic channel where the rod chamber is located. The wireless solenoid valve group is also provided with a one-way valve hydraulic channel which is respectively connected to the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve; a second two-position four-way wireless solenoid valve is respectively connected to the inlet, outlet and one-way valve hydraulic channel of the pump.

6. A wireless hydraulic actuator according to claim 3, characterized in that: The wireless solenoid valve includes a wireless proportional directional valve and a wireless proportional pressure reducing valve. A first hydraulically controlled one-way valve is provided on the built-in hydraulic channel where the rodless chamber is located. The built-in hydraulic channel where the rod chamber is located is connected to the first hydraulically controlled one-way valve through the one-way valve hydraulic channel.

7. A wireless hydraulic control system, characterized in that: A wireless hydraulic actuator as claimed in any one of claims 1 to 6, further comprising a first energy transmitting device, or further comprising a first energy transmitting device and a second energy transmitting device; When the resonant frequency of the first energy transmitting device is consistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve is powered on and operates; when the resonant frequency of the first energy transmitting device is inconsistent with the resonant frequency of the first resonant circuit, the wireless solenoid valve loses power and stops working; When the resonant frequency of the second energy sending device is consistent with the resonant frequency of the second resonant circuit, the servo motor is powered on and starts; when the resonant frequency of the second energy sending device is inconsistent with the resonant frequency of the second resonant circuit, the servo motor loses power and stops working.

8. A wireless hydraulic control system according to claim 7, characterized in that: When the wireless solenoid valve is a three-position four-way wireless solenoid valve, The actuator lifts the load upward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant 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 electrically 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, and the hydraulic oil enters the rodless cavity of the actuator through the three-position four-way wireless solenoid valve and the first hydraulically controlled one-way valve, and the actuator moves upward, and the oil in the rod cavity of the actuator flows into the inlet of the pump through the oil return channel of the three-position four-way wireless solenoid valve, and then flows into the rodless cavity of the actuator through the pump, and the oil volume difference between the rodless cavity and the rod cavity is replenished through the accumulator; The actuator moves downward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant 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 electrically 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, and the hydraulic oil enters the rod chamber of the actuator through the three-position four-way wireless solenoid valve, and the actuator moves downward, and the oil in the rodless chamber of the actuator flows into the inlet of the pump through the oil return channel of the three-position four-way wireless solenoid valve, and then flows into the rod chamber of the actuator through the pump, and the excess oil in the rodless chamber flows into the accumulator; The actuator stops moving: the resonant frequency of the first energy sending device is set to be inconsistent with the resonant frequency of the first resonant circuit in 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 hydraulically controlled one-way valve loses pressure and closes, sealing the oil volume in the rodless chamber of the actuator, and the position of the actuator is maintained.

9. A wireless hydraulic control system according to claim 7, characterized in that: When the wireless solenoid valve is a 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. The actuator lifts the load upward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant circuit where the first two-position four-way wireless solenoid valve and the left coil of the second two-position four-way wireless solenoid valve are located, and the first two-position four-way wireless solenoid valve and the second two-position four-way wireless solenoid valve are electrically actuated at the left position; the pump, driven by the servo motor, delivers hydraulic oil to the two two-position four-way wireless solenoid valves, and the hydraulic oil enters the control chambers of the two hydraulically controlled one-way valves through the left-position pressure channel of the second two-position four-way wireless solenoid valve, and the channels of the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve are opened, then the system hydraulic oil enters the rodless chamber of the actuator through the left-position pressure channel of the first two-position four-way wireless solenoid valve and the two hydraulically controlled one-way valves, the actuator moves upward, and the oil in the rod chamber of the actuator flows into the inlet of the pump through the return oil flow channel of the first two-position four-way wireless solenoid valve, and then flows into the rodless chamber of the actuator through the pump, and the oil volume difference between the rodless chamber and the rod chamber is replenished through the accumulator; The actuator moves downward: the resonant frequency of the first energy transmitting device is set to be consistent with the resonant frequency of the first resonant circuit where the left coil of the second two-position four-way wireless solenoid valve is located, and inconsistent with the resonant frequency of the first resonant circuit where the left coil of the first two-position four-way wireless solenoid valve is located, the second two-position four-way wireless solenoid valve is energized in the left position, 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, and the hydraulic oil enters the control chamber of the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve through the left-position pressure oil channel of the second two-position four-way wireless solenoid valve, and the hydraulic flow channel of the one-way valve is opened, and the hydraulic oil enters the rod chamber of the actuator through the right-position pressure channel of the first two-position four-way wireless solenoid valve, the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve, and the actuator moves downward, and the oil in the rodless chamber of the actuator flows into the inlet of the pump through the oil return channel of the first two-position four-way wireless solenoid valve, and flows into the rod chamber of the actuator through the pump, and the excess oil in the rodless chamber flows into the accumulator through the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve; The actuator stops moving: the resonant frequency of the first energy sending device is set to be inconsistent with the resonant frequency of the first resonant circuit in the second two-position four-way wireless solenoid valve, the second two-position four-way wireless solenoid valve loses power and stops working, the second two-position four-way wireless solenoid valve remains in the right position, the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve lose pressure and close, the oil volume in the rodless chamber and the rod chamber of the actuator is sealed, and the position of the actuator is maintained.

10. A wireless hydraulic control system according to claim 7, characterized in that: When the wireless solenoid valve includes a wireless proportional directional valve and a wireless proportional pressure reducing valve, The actuator lifts the load upward: the resonant frequency of the first energy sending device is set to be consistent with the resonant frequency of the first resonant capacitor connected to the wireless proportional directional valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional directional valve is 4-12 mA, the valve core of the wireless proportional directional valve moves to the left position, and 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 pressure oil channel of the wireless proportional directional valve, and the first hydraulically controlled one-way valve into the rodless chamber of the actuator. The actuator moves upward, and the oil in the rod chamber of the actuator flows into the inlet of the pump through the left return oil channel of the wireless proportional directional valve, and flows into the rodless chamber of the actuator through the pump. The oil volume difference between the rodless chamber and the rod chamber is replenished through the accumulator; The actuator moves downward: the resonant frequency of the first energy sending device is set to be consistent with the resonant frequency of the first resonant capacitor connected to the wireless proportional directional valve and the wireless proportional pressure reducing valve. When the control current of the wireless proportional directional valve is between 12 and 20 mA, the valve core of the wireless proportional directional valve moves to the right position, and 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 channel of the wireless proportional directional valve, and the first hydraulically controlled one-way valve into the rod chamber of the actuator. The actuator moves downward, and the oil in the rodless chamber of the actuator flows into the inlet of the pump through the right-position return oil channel of the wireless proportional directional valve, and then flows into the rod chamber of the actuator through the pump. The excess oil in the rodless chamber flows into the accumulator through the first hydraulically controlled one-way valve. The actuator stops moving: the resonant frequency of the first energy sending device is set to be inconsistent with the resonant frequency of the first resonant capacitor integrated in the wireless proportional directional valve and the wireless proportional pressure reducing valve, the wireless proportional directional valve and the wireless proportional pressure reducing valve lose power and stop working, and the wireless proportional directional valve and the wireless proportional pressure reducing valve remain in the middle position; the first hydraulically controlled one-way valve loses pressure and closes, sealing the oil volume in the rodless chamber of the actuator, and the position of the actuator is maintained.

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